Gasketed pipe clamp.

(54) Title: PIPE CLAMP WITH JOINTS. (54) Title: GASKETED PIPE CLAMP.

(57) Summary

A pipe clamp including a band having an inner surface defining a first channel segment located internally of the first and second axial ends of the band, a clamping mechanism for pulling the first and second circumferential ends of the band from each other to tighten the band, and a bridge that splices the inner surface and that circumferentially spans an interval in the first channel segment that is located in the tightening mechanism. The bridge has a second channel segment aligned with the first channel segment such that the first and second channel segments together define a substantially continuous circular channel located in an inner portion of the clamp. The pipe clamp further includes a second gasket at least partially within the channel. The bridge can be connected to a reaction block used in the clamping mechanism to maintain the proper position during band clamping.

(57) Abstract

A pipe clamp that ineludes a band having an inner surface defining a first channel segment located inwardly of first and second axial ends of the band, a tightening mechanism for drawing first and second circumferential ends I heard the band toward each other to tighten the band, and a bridge abutting the inner surface and circumferentially spanning a break in the first channel segment that is located at the tightening mechanism, The bridge has a second channel segment aligned with the first channel segment such that the first and second channel segments together define a substantially continuous circular channel located at an interior portion of the clamp. The pipe clamp f urther ineludes a gasket seated at least partially within the channel. The bridge can be attached to a reaction block used in the tightening mechanism to maintain proper position during tightening of the band.

_I KNOW_

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Λ ', Ι, ίιίν

Institute

Mexican Property

Industrial

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PATENT TITLE YEAR. 338366

Owner (s): NORMA U S. HOLDING LLC

Address: 2430 E. Walton Boulevard, Auburn Hills, Michigan, 48326, USA

Name: PIPE CLAMP WITH JOINTS Classification: lnt.CI.8. F16B2 / 08; F16J15 / 10; F16L21 / 06; F16L21 / 08

Inventor (s): BRIAN T. GEESE; BRIAN T. IGNACZAK

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, T¹

MX / dfeO12 / QQ | 626

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PRIORITY

Date:

January 2010

Number:

61/296,939

Validity: Twenty years | Coot of VencInlentoHfeO

The reference ii to eerga with fugdameni ormidad with the articulj da from the date I hos. i subscribes to this t Sedad Industrial (Diario i ¡1/2004, 16/0672005, 25

a), 4th and 12th fraction 9/2002, 07/15/2004, 28 Mexican Institute of Law, this patent is valid for twenty years improl I and will be subject to the payment of the fee to * maintain vid

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Ut and Ϊ * bis 2 of the

........- ustrial (DOF 12/27/1999, reform snero of 2031 ¡articles 1 °, 2 ° fraction V, 6 ° fraction III, and 59 gives the Law of Industrial Property.

of the I ydelaPi presented him with the ogables, before those with the Federation (D (/ 2006, 06 5 / 2009,06 / 01/201 of Instifi regulations

92004 and 7, 3/2007); Articles 1, 3 », 4 'ppiedad Ir delegates regional fai, Deputy Directors DivisíoñaTes''Cóó'rdinadoresDepartarñéntales y otros sül Industrial. (DOF 12/15/1999, amended on 02/04/2000, 07/29/2004, 08/04/2004 and 09/13/2007).

r articles 8^to run on 08/02/1994, 41 ^ 0199 ^ 12/26/1997. 11 10 .; 01/07/2012 1 0aW20ie); items 1^to, 3·

....... '““ “.OF 12/14/1 999, ües I and III and 30 of the Statuti 9/07/2004, 08/04/2004 and 13/09/2 2C otherssuoWsmosaennstrluloMSacanoaelai and from / 1999, icclón V side el irgánico '); one^to, 3^toS of the ^rrobbery

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Issue Date: April 13, 2016

DIVISIONAL DIRECTOR OF PATENTS

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NAHANNY CANAL REYES

Sand! No. 550, Floor 1,

Santa María Tepepan town. Xochimiico, CP 16020.

Mexico City on. (55) 53 34 07 00 www ¡mpi.gob-¡Tix ·

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MX / 2016/28987

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Μχ (α | Zciz Iccqó2¿

11VI ΓI

PIPE CLAMP WITH JOINTS. ^_JTO —-~~~¹ - ~~~ DELA PROHfDAD

DESCRIPTION OF THE INVENTION

This invention relates to pipe clamps, and to pipe clamps having gaskets.

Pipe clamps are commonly used to join tubular components together, for example pipes or tubular housings. These clamps can be used in a variet y of applications with some clamps specifically designed for specific components or for use in specific applications, and others from a design intended to make them more generally or universally applicable. Such an application of pipe clamps is for connecting pipes or other components in automobile exhaust systems. Frequently, these exhaust system applications require or at least desirably provide a pipe end joint that seals against exhaust gas leakage and has good resistance against axial separation. One type of pipe clamp is a band clamp that is used with telescopically overlapping pipe ends, and another type is a pipe coupler that is used with end to end splice pipe ends. Both types normally include a metal band that is placed and tightened over the pipe ends, and both types can include a sealing sleeve and / or a gasket that is sandwiched between the band and

<img file="MX338366B_D0012.tif" />

<img file="MX338366B_D0013.tif" />

pipe ends.

In accordance with an embodiment of the invention, a pipe clamp is provided that includes a band having an inner surface defining an internally located first channel segment of the first and second axial ends of the band, a clamping mechanism for removing the first and second circumferential ends of the band with each other to tighten the band, and a bridge splicing the inner surface and circumferentially spanning an interval in the first channel segment that is located in the clamping mechanism, the bridge has a second channel segment aligned with the first channel segment so that the first and second channel segments together define a substantially continuous circular channel located in an inner portion of the clamp. The pipe clamp also includes a sealed joint, at least partially within the channel.

In accordance with another embodiment of the invention, a pipe clamp is provided that includes a band having an inner surface defining a first channel segment located internally of the first and second axial ends of the band, a clamping mechanism for removing the first and second circumferential ends of the band with each other to tighten the band, a bridge that buttresses the inner surface and encompasses

<img file="MX338366B_D0014.tif" />

INSTITUTO Mr.X! CANO DE LA HROWEDaD

INDUSTRIAL

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circumferentially a gap in the first channel segment that is located in the clamping mechanism, and a sealed joint, at least partially within the first channel segment. The clamping mechanism includes a reaction block, with the bridge being connected to a radially oriented surface of the reaction block. By tightening the clamping mechanism, the bridge is held with the reaction block when the first and second circumferential ends of the band approach or approach the reaction block.

In other embodiments of the invention, a pipe clamp is provided having a band, clamping mechanism, bridge, and gasket located at least partially within a channel that circumferentially extends around the band and across the bridge. In some of these embodiments, the bridge may have circumferential ends that are chamfered at a selected angle (for example, within the range of 1 ° to 10 °) to thereby provide a substantially uninterrupted interior surface of the channel against which it sits board. In any of these or other embodiments, the clamping mechanism may include a reaction block that couples one or more radially projecting reliefs on the bridge to thereby exert a radially inward force on the bridge during

<img file="MX338366B_D0016.tif" />

<img file="MX338366B_D0017.tif" />

band tightening. Also in these or other modalities, the bridge and band may each have comparative pilot features that act to guide the placement of the bridge under the band during use and the tightening of the clamp. Pilot features can be implemented in any suitable way, but in some embodiments include a slant cut located on the band and tongue can be located on each axial end of the band and bridge so that the bridge is prevented from moving axially with respect to the band in the axial direction by the coupling of the tabs with their respective skewed cuts.

BRIEF DESCRIPTION OF THE DRAWINGS Preferred exemplary embodiments of the invention will be described hereinafter together with the accompanying drawings, where similar designations denote similar elements, and wherein:

FIGURE 1 is a perspective view of a multi-pipe assembly;

<td></td><td>the</td><td>FIGURE 2 is</td><td>a</td><td>view</td><td>elongated</td><td>of</td><td>a</td><td>modality</td>

<td>copy</td><td>from i</td><td colspan="4">a pipe clamp;</td><td></td><td></td><td></td>

<td></td><td>the</td><td>FIGURE 3 is</td><td>a</td><td>view</td><td>exploded view</td><td>of</td><td>the</td><td>clamp</td>

<td colspan="2">for pipe</td><td>of the FIGURE</td><td> 2;</td><td></td><td></td><td></td><td></td><td></td>

<td></td><td>the</td><td>FIGURE 4 is</td><td>a</td><td>view</td><td>elongated</td><td>of</td><td>a</td><td>modality</td>

<td>copy</td><td>of</td><td>a bridge</td><td colspan="2">used</td><td>with the</td><td colspan="3">clamp for</td>

pipe of FIGURE 2;

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

<img file="MX338366B_D0018.tif" />

FIGURE 5 is a sectional view of the pipe clamp of FIGURE 2 taken along line 5-5 of the figure;

FIGURE 6 is an elongated view of exemplary embodiments of the pilot features used with the pipe clamp of FIGURE 2;

FIGURE 7 is a side view of the pipe clamp of FIGURE 2;

FIGURE 8 is an elongated view of an exemplary embodiment of a test mouth used with the clamp for FIGURE 2;

FIGURE 9 is an elongated view of an exemplary embodiment of a bridge and gasket assembly shown in a loose state;

FIGURE 10 is a partially exploded view of the bridge assembly and FIG. 9;

FIGURE 11 is an elongated view of the bridge and joint assembly of FIGURE 9 shown in a tight state;

FIGURE 12 is a sectional view taken along line 12-12 in FIGURE 11;

<td></td><td>the</td><td>FIGURE</td><td>13 is</td><td>a</td><td>sectional view taken at</td><td>the</td>

<td>length of</td><td>the</td><td>line</td><td> 13-13</td><td>in the</td><td>FIGURE 11, which shows</td><td>the</td>

<td>assemble</td><td>of</td><td>bridge</td><td>and board</td><td>than</td><td>interacts with one end</td><td>of</td>

<td>pipeline;</td><td>and</td><td></td><td></td><td></td><td></td><td></td>

FIGURE 14 is an elongated view of one embodiment

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MEXICAN INSTITUTE OF PROPERTY

INDUSTRIAL

<img file="MX338366B_D0020.tif" />

specimen of a bridge and gasket assembly shown in a tight condition.

Referring to the drawings, an exemplary embodiment of a pipe clamp 10 is used to join pipe ends together in an automobile exhaust system to provide a fluid tight seal with good resistance against axial separation. As shown and described, the pipe clamp 10 is suitable for use as a pipe coupler to secure spliced ​​pipe ends, but could be adapted for telescopic overlapping pipe ends. In general, the pipe clamp 10 has a mostly circular and cylindrical shape that defines an axial direction extending along or generally parallel to a central axis of the shape, a radial direction extending along along the radius of the shape, and a circumferential direction that extends along the circumference of the shape.

With reference to FIGURE 1, multiple clamps 10 can be used in a multi-pipe assembly 12 commonly equipped on large trucks such as semi-trailer trucks, and commonly associated with Diesel Particulate Filters (DPF). In these high-temperature applications, a thermal shield (imaginary) 14 is often placed around the multi7 assembly 12

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pipes to insulate it from its surroundings, and multiple pipe clamps 10 are oriented so that their structures do not interfere with thermal shielding. In addition to the DPF application shown in FIGURE 1, the pipe clamp 10 can be used with other exhaust system components, as well as with a simple exhaust pipe assembly, and smaller cars without thermal shields. Thus, the pipe clamps described and claimed herein can be used not only to secure regular straight pipe sections, but also for such things as DPF baskets, catalytic converters, and other tubular components in automotive systems as well as applications. they are not for cars.

Referring to FIGS. 2 and 3, the pipe clamp 10 joins a first end 18 of splice pipe or narrow splice of a first pipe 16 with a second pipe end 22 of a second pipe 20. In the illustrated embodiment, pipe clamp 10

<td>It includes</td><td>a band</td><td> 24,</td><td>a clamping mechanism 26, a bridge</td>

<td colspan="2">28, and a board 30.</td><td></td><td></td>

<td></td><td>The band</td><td> 24</td><td>circumferentially surrounds the first and</td>

<td>second</td><td>extremes</td><td> 18,</td><td>22 of pipe. Band 24 can</td>

<td>form</td><td>starting</td><td>of</td><td>a sheet of steel, such as steel</td>

409 grade stainless, or other suitable material, i.e.

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worked in metal in an open loop. In different examples, band 24 has an axial width ranging from about 55-68mm and has a radial thickness of about 1.22mm; of course other dimensions are possible and will depend on the application. Still referring to FIGURES 2 and 3, the band 24 extends circumferentially from a first circumferential end 32 to a second circumferential end 34, and extends axially from a first axial end 36 to a second axial end 38. On a radially and internally oriented side, the band 24 has an inner surface 40, and an radially and externally oriented side the band has an outer surface 42.

In the embodiment shown, band 24 has a first and second flanges 44, 46, a first channel segment 48, and a first and second pilot features 50, 52, and a trial muzzle 54. As best shown in FIGURE 4, the first and second flanges 44, 46 respectively comprise unit portions of the first and second circumferential ends 32, 34, and are formed by portions of the band 24 folded away from each other and on themselves To provide a pair of radially projecting loops, each loop has an inner and an outer limb. The first channel segment 48 receives gasket 30 and is located approximately axially in the middle of band 24

<img file="MX338366B_D0023.tif" />

internally of the first and second axial ends 36, 38, and extends circumferentially at least so

<td>partial between the</td><td>first</td><td>and second</td><td>extremes</td><td> 32,</td><td> 34</td>

<td>circumferential. The</td><td>first</td><td>segment 48</td><td>channel se</td><td>locates</td><td>in</td>

<td colspan="2">inner surface 40</td><td>and produces</td><td>a flange</td><td>than</td><td>I know</td>

<td>projects radially</td><td>in the</td><td>surface</td><td>42 exterior</td><td>. In</td><td>a</td>

For example, the radial depth of the first channel segment 48 as measured from the immediately surrounding inner surface 40 without channel is approximately 0.4 mm, the exact radial depth of the first channel segment may vary for different applications and may depend on Among other factors, the radial thickness of the seal 30. The first channel segment 48 is linked by first and second sloped transition sections 56, 58, leading to the axial extension of the first and second side walls 60. 62. In some embodiments, the first channel segment extends circumferentially toward the first and second flanges 44, 46 such that each flange has a radially projecting flange or a beveled or slotted section located in a lower portion thereof, and mating with the radiantly projecting rim of the outer surface 42 so that the flanges can accommodate the first channel segment.

The first and second pilot features 50, 52 interact with complementary pilot features of the

<img file="MX338366B_D0024.tif" />

bridge 28 to guide bridge placement relative to band 24. When initially assembled, the pilot features help locate bridge 28 axially and circumferentially with band 24. Also, when tightened, the pilot features help maintain axial and circumferential positions of bridge 28 with band 24. Referring to FIGURES 2 and 6, in the illustrated embodiment, the first and second pilot features 50, 52 are first and second rectangular bias cuts located respectively at the first and second axial ends 36, 38. In other embodiments, the first and second pilot features 50, 52 may have different designs and locations. For example, pilot features could be openings located in band 24 and positioned axially inside axial ends 36, 38, pilot features could be radially inward projections, a single pilot feature, or more than two pilot features could be provided, or a combination thereof. Furthermore, the first and second pilot characteristics need not be provided in band 24.

Referring to FIGURES 2 and 8, the test port 54 receives a temperature and / or pressure gauge so that the temperature and / or pressure of the exhaust gases passing through the first and second pipes 16, 20 can

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be taken. Test mouth 54 is mounted on band 24 by peripheral solder 64 at an interconnection between test mouth and band. Test port 54 is located in the first channel segment 4 8 so that the associated meter can be inserted through a gap 65 located between the first and second pipe ends 18, 22 (FIGURE 5). The meter can be inserted through a passage 66 located in the test mouth 54 and through a passage 68 located in the band 24. In other embodiments, the test mouth 54 need not be provided.

The clamping mechanism 26 connects to the band 24 and can be tightened and loosened to bring the first and second circumferential ends 32, 34 towards and away from each other. Referring to FIGURE 3, in the illustrated embodiment, the clamping mechanism 26 includes a combination of double bolt fastener and nut, a reaction block 70, and a reinforcing plate 72. The fastener combination includes a first and second T bolt 74, 7 6, and a first and second nut 78, 80. Each bolt has a semi-round head to evenly distribute clamping forces, and has a partially threaded stem. Reaction block 70 has a double convex shape and has a pair of passages for receiving the first and second T bolts 74, 76. Reaction block 70 has a radially inward facing surface 82 (FIGURE 5), which may be a flat surface or it can be

IMPI

MEXICAN INSTITUTE OF THE «ΈΟΚΕΩΑυ INDUSTRIAL

<img file="MX338366B_D0026.tif" />

an arched surface. The support plate 72 is semi-round in shape and has a pair of passages for receiving the first and second T-bolts 74, 76. When assembled, the first and second T-bolts 74, 76 are inserted through the respective passages and through the steps located on the first and second tabs 44, 46. When tightened, the first and second nuts 78, 80 are screwed into the first and second T bolts 74, 7 6 and the semi-round heads, the reaction block 70, and the support plate 72 act together to pull the first and second ends 32, 34 circumferential with each other to cause a radially internal force that is uniformly distributed across the circumference of band 24. In other embodiments, the clamping mechanism 26 can have different constructions and configurations. For example, the clamping mechanism 26 may have a combination of a single bolt fastener and nut, the reaction block 70 and the support plate 72 may have a notch provided on their radially inward facing surfaces to accommodate a flange that is projects radially, the reaction block and / or the support plate need not be provided, and the clamping mechanism may be of the quick connect type, as shown for example in US Patent No. 7,441,311 to Lovgren et al., to name a few examples.

When assembled, bridge 28 spans a

<img file="MX338366B_D0027.tif" />

Interval 84 (FIGURE 3) in band 24 is somewhat circumferentially continuous and protects against exhaust gas leakage therein. In the cross-sectional profile, bridge 28 generally coincides with that of band 24 and in one sense bridge 28 is a cut-away segment of band 24. In some cases, bridge 28 replaces a circumferentially continuous inner seal sleeve or a discontinuous circumferentially divided inner seal sleeve provided in other pipe clamps, although not required. Bridge 28 may be formed of steel, such as 409 grade stainless steel, or other suitable material. In different examples, bridge 28 can have an axial width ranging from about 55-68mm and can have a radial thickness of about 1.22mm, about 0.74mm, or about 0.38mm; Of course, other dimensions are possible and may depend on the application. For example, the exact radial thickness of the bridge 28 may depend, among other factors, on the required or desired structural integrity of the band and the radial thickness of the joint 30.

Referring to FIGURES 3 and 4, bridge 28 spans the axial extent of band 24 and has a first axial end 86 that is axially aligned with the first axial end 36 of the band, and has a second axial end 88 that is axially aligns with second end 38

ΙΜ

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<img file="MX338366B_D0028.tif" />

MEXICAN INSTITUTE \ Τ · ί-ηDE the industrial axial PROPERTY of the band. Bridge 28 has a circumferential length that is at least co-extensive with the circumferential extent of interval 84 and may be larger or smaller than shown. Bridge 28 extends circumferentially from a first circumferential end 90 to a second circumferential end 92. The first circumferential end 90 may have a first chamfer or bevel 94 (FIGURE 7), and the second circumferential end 92 may have a second chamfer or bevel 96. The first and second bevels 94, 96 provide mostly uninterrupted and continuous feed between bridge 28 and band 24 to accommodate the seated joint 30, compared to a non-beveled end which can produce vertical staggering therein and at In some cases it could deform the seal and thus be a source of fluid leakage. In some cases, a minimal transition structure (eg, a beveled edge) between bridge 28 and band 24 facilitates the use of a thinner joint than might otherwise be the case (eg, vertical staggered). In one example, the first and second beveled surfaces create an angle of 1-10 °, preferably 2 °, with respect to an exterior surface 100 of bridge 28. The first and second bezels 94, 96 are located continuously along the edge of the respective first and second circumferential ends 90, 92. On one side facing radially and internally, the

<img file="MX338366B_D0029.tif" />

<img file="MX338366B_D0030.tif" />

Bridge 28 has an inner surface 98, and on one radially and externally oriented side, the bridge has outer surface 100.

Referring to FIGURES 3-5, in the illustrated embodiment, bridge 28 has a second channel segment 102 102, a first and second relief 104, 106, and a first and second pilot feature 108, 110. The second channel segment 102 is similar in shape and size to the first channel segment 48 of band 24. When assembled, the first and second channel segments 48, 102 together define a circumferentially continuous circular channel 112 that is located on the inner portion of the pipe clamp 10 or on the radially and internally oriented inner surface of the pipe clamp. The second channel segment 102 receives a section of the joint 30 and is located approximately axially halfway in the bridge 28 internally from the first and second axial ends 86, 88, and extends circumferentially between the first and second circumferential ends 90, 92. The axial extent of the second channel segment 102 may be substantially the same as that of the first channel segment 48, or slightly less than that of the first channel segment. The second channel segment 102 is located on the inner surface 98 and produces a radially projecting rim on the outer surface 100. In one example, the

IMPI

INSTITUTE, ΜΞΧιΌλΝΟ D £ THE INDUSTRIAL PROPERTY

<img file="MX338366B_D0031.tif" />

radial depth of the second channel segment 102 as measured from the immediately surrounding inner surface 98 and without channel is approximately 0.4 mm, the exact radial depth of the second channel segment may vary for different applications and may depend, among other factors, on the · radial thickness of the seal 30. The second channel segment 102 is linked by the first and second inclined transition sections 114, 116 leading to the axial extension of the first and second side walls 118, 120.

The first and second reliefs 104, 106 are located respectively on the first and second side walls 118, 120 and, when assembled, are located radially under the clamping mechanism 26. Each relief 104, 106 may produce a rectangular structure projecting radially onto the outer surface 100, or may produce a structure of another shape. Axially, each relief 104, 106 spans most of the axial extent of the respective side wall 118, 120, and circumferentially, each relief spans the circumferential extent of the reaction block 70. When assembled and in a loose (i.e. not tight) state, a first and second gap 122, 124 are located between the first and second relief 104, 106 and the first and second pipes 16, 20.

The first and second characteristics 108, 110

<img file="MX338366B_D0032.tif" />

pilot complement and interact with the first and second pilot characteristics 50, 52 of the band 24. Referring to FIGURES 3, 4, and 6, in the illustrated embodiment, the first and second pilot features 108, 110 are first and second tabs respectively extending radially and externally from the first and second axial ends 86, 88. The first and second tabs are received at the first and second slant cut of band 24. Similar to the first and second pilot features 50, 52 of the band 24, the first and second pilot features 108, 110 may have different designs and locations and may largely depend on the design and location of the pilot features of the band, or vice versa. For example, the pilot features could be located internally from the axial ends, the pilot features could be skewed cuts or openings, a single pilot feature or more than two pilot features could be provided, or a combination thereof. Also, pilot features do not need to be provided on the bridge.

In some embodiments, bridge 28 can be preassembled on other components of pipe clamp 10, although they are not required. For example, jumper 28 may be connected to band 24 by one or more spot welds on one side of the bridge and the band opposite pilot features such as near second end 92

<img file="MX338366B_D0033.tif" />

circumferential; in this case, the first circumferential end 90 and the first and second pilot features 108, 110 may be slidable in the circumferential direction with respect to the first circumferential end 32 with the assembly and tightening for proper circumferential fit. Also, bridge 28 can be connected to reaction block 70 by one or more spot welds. These spot welds can be located away from the second channel segment 102 to avoid deformation of the channel segment and possible interference with the gasket 30 with the assembly. In addition, bridge 28 can be connected to band 24 by mechanical interlocking, such as by folded flaps that are wrapped around the first and second axial ends 36, 38 of the band.

Gasket 30 is seated in channel 112 and forms a metal gasket seal at the first and second pipe ends 18, 22. Gasket 30 can be formed of any material suitable for the intended application. For example, a relatively soft material that compresses when the pipe clamp 10 is tightened; for automotive applications such materials may include a graphite material, a mica material, a ceramic fiber, and a glass fiber. In some cases, and depending on the material used for gasket 30, a stainless steel sheet may be located on an interior surface 126 to protect

IMPI

MEXICAN INSTITUTE

OF THE PRO? In DA D VX- r Zf -J.

INDUSTRIAL gasket against direct contact with exhaust gas which could cause oxidation. Referring to FIGURES 3 and 5, gasket 30 has an outer surface 128, and has an axial width approximately equal to that of channel 112. Gasket 30 may have a radial thickness approximately equal to or greater than the radial depth of channel 112. In case of a greater radial thickness than the radial depth, the joint can be radially compressed after wear of the clamping mechanism 26 to allow a metal-to-metal coupling between the side walls 60, 62 and the outer surfaces of the pipes 16, 20 In some cases, a radially thinner gasket 30 can facilitate such metal-to-metal coupling. Radial joint thickness 30 includes 0.5mm, 0.7 6mm, and 1.5mm, of course other thicknesses are possible. A pressure sensitive adhesive can be located on the outer surface 128 to join the gasket 30 to the band 24 and / or the bridge 28, or a stainless steel structure can be integrated into the gasket to impart a radially extending elastic bending force which pre-assembles the gasket to the band by means of a press fit. And although not shown, a passage can be located in gasket 30 to receive the temperature and / or pressure probe. In other embodiments, the gasket 30 can have different constructions. For example, gasket 30 need not be continuous circumferential as shown and in fact could

<img file="MX338366B_D0034.tif" />

be circumferentially discontinuous similar to an open circuit with circumferential joining ends, or the joint may have an axial width greater or less than that of channel 112.

In use, the bridge 28 is positioned within the band 24 and radially under the clamping mechanism 26. The outer surface 100 of the bridge 28 splices against the inner surface 40 of the band 24, and the outer surface of the radially projecting flange formed by the second channel segment 102 and the outer surfaces of the first and second relief 104, 106 splice against the inner surface 82 of the reaction block 70. Gasket 30 may settle into channel 112 before pipe clamp 10 is placed around the ends of pipe 18, 22. The gasket 30 then remains seated in the channel 112 by an outward bending force exerted by the gasket against the channel due to its intrinsic elasticity, or may be held more positively in the channel by an adhesive, retainer, or other mechanical interconnect.

Upon tightening, the reaction block 70 exerts a radial inward force against the radially projecting, radially projecting protrusion of the second channel segment 102 and the first and second reliefs 104, 106, which in turn exert a downward force. radially against the joint 30 and the first and second pipe ends 18, 22. Of this

IMPI

MEXICAN INSTITUTE OF THE INDUSTRIAL PEOPLE

<img file="MX338366B_D0035.tif" />

Thus, together the radially projecting protrusion and the first and second relief 104, 106 distribute the radial inward force exerted across the axial width of bridge 28 and toward the underlying joint 30 and pipe ends 18, 22, as opposed to completely distribute the radial force exerted to the radially projecting projection on the bridge which could deform by itself and over compress the joint. The first and second reliefs 104, 106 stiffen and reinforce the bridge 28 at a location under the reaction block 70 that prevents over-compression of the gasket 30 therein and the resulting leakage that may occur from another. Also, the distributed radial force avoids deformation in the reaction block 70 that may otherwise present itself against the radially projecting rim without the first and second relief 104, 106. In the illustrated embodiment, the circumferential extension of the slanting cuts in the band allows the band to shrink circumferentially with tightening while avoiding interference that may otherwise arise from the first and second tabs of bridge 28.

Referring to FIGURES 9-13, an illustrated embodiment of a bridge and gasket assembly includes a bridge.

228, a first joint 230, and a second joint 231. The bridge and joint assembly may be a part of the pipe clamp 10 with the band and the mechanism of

<img file="MX338366B_D0036.tif" />

tightening described with reference to FIGURES 1-8. Bridge 228 is similar in certain ways to bridge 28 in FIGURES 1-8, and some of these similarities will not be described here. When assembled, bridge 228 spans a gap 284 in band 224 otherwise continuously and protects against exhaust gas leakage therein. In the illustrated embodiment, bridge 228 is generally rectangular in shape and spans the axial extent of band 224, and has a first axial end 286 and a second axial end 288. Bridge 228 also has a first circumferential end 290 and a second circumferential end 292; The first and second circumferential ends do not, although they may, have a chamfered or chamfered edge. On a radial and externally oriented side, bridge 228 has an inner surface 298, and on a radial and externally oriented side, bridge has an outer surface 300. Inner surface 298 is a generally flush surface and does not, although it may, have a channel segment located therein.

In the side profile and in an untightened state, as shown in FIGURES 10, bridge 228 has a steeper and tighter curve than band 224; in other words, the bridge has a smaller radius of curvature than that of the band. This structural relationship produces a radial gap between the respective first and second circumferential ends of bridge 228 and band 224.

<img file="MX338366B_D0037.tif" />

when the bridge is connected to the clamping mechanism 226. During the tightening of the pipe clamp 210, interference is avoided between the respective first and second circumferential ends of the bridge 228 and the band 224, which may occur in some without any radial air gap. The radial gap also delays contact and engagement between bridge 228 and band 224, between bridge and first joint 230, and between first joint and second joint 231 until later stages of the tightening action when the first and second circumferential ends 232, 234 of the band are pulled out together. This can help to avoid bad positions of the bridge 228 with respect to the band 224, and can help to avoid bad positions of the first and second bands 230, 231 with respect to each other such as accumulation and fixing of the gasket material, especially accumulation of First joint material at the first and second circumferential ends 290, 292 of the bridge.

Referring to FIGURES 9-11, in the illustrated embodiment, bridge 228 has a first tab 301, a second tab (not shown), a first skewed cut 303, and a second skewed cut 305. The first and second tabs 301 help locate bridge 228 on band 224 and help reinforce bridge 228 structure to help prevent subsidence and other deformation that could occur

<img file="MX338366B_D0038.tif" />

MEXICAN INSTITUTE OF THE PROPERTY

INDUSTRIAL

<img file="MX338366B_D0039.tif" />

during assembly, tightening, and use. The first and second flanges 301 are respectively located at the axial ends 286, 288 and are angled sides folded perpendicular to the outer surface 300. The first and second flanges 301 need not be provided for certain applications, such as where no structural reinforcement features are needed or where different structure reinforcement characteristics are provided similar to circumferentially directed flanges.

The first and second slanted cuts 303, 305 facilitate the transition between the first and second joints 230, 231 in coupling and confronting the joints. The slanted cuts 303, 305 limit the direct coupling between the bridge 228 and the first joint 230 during the clamping action, and can help to avoid bad positions such as accumulation or fixation of the joint material, especially accumulation of the material of the first joint at the first and second ends 290. 292 circumferential of the bridge. The first and second slanted cuts 303, 305 are respectively located at the circumferential ends 290, 292 and are generally U-shaped cavities at the ends; Of course, other shapes of cavities are possible such as semi-circular shapes. The first and second slanted cuts 303, 305 have an axial extension that can be equal to or greater than the axial extension of the

<img file="MX338366B_D0040.tif" />

MEXICAN INSTITUTE 0- LA ΡΠΟ? / ΡλΟ

INDUSTRIAL

<img file="MX338366B_D0041.tif" />

second joint 231, and having a circumferential extension sufficient to span the gap 284 in band 224, when the band is tightened. Each slant cut has a first side edge 307, a second side edge 309, and a bottom edge 311. Bias cuts 303, 305 need not be provided as necessary in bridge 228.

In the assembly, bridge 228 connects to reaction block 27 0 such that the bridge remains with the reaction block during the clamping action to properly locate the position of the bridge relative to band 224; for example, for suitable circumferential position with respect to the circumferential ends 232, 234 of the band. Bridge 228 can be pre-assembled and connected to reaction block 270 before pipe clamp 210 is placed around pipe ends. Referring to FIGURE 10, during tightening, band 228 moves with reaction block 270 as the first and second tabs 244, 246 of band 224 move toward each other, when one of the first and second tab moves towards each other, and / or when the reaction block itself moves towards one of the first and second tabs of the band (movement of the reaction block represented by arrows A, B). This can also help to avoid bad positions such as accumulation or fixing of the gasket material, especially the accumulation of the gasket material.

IMPI

Mexican Institute of Industrial Property

<img file="MX338366B_D0042.tif" />

first joint 230 at the first and second circumferential ends 290, 292 and / or at the lower edge 311 of bridge 228. Referring to FIGURES 9 and 11, bridge 228 may be connected to reaction block 270 by spot welds 313 which they bring the outer surface 300 into direct contact with the radially inward facing surface of the reaction block. Bridge 228 can also be connected in another way, such as by folded fins extending from the bridge and piercing both sides of reaction block 270 or engaging a retaining structure.

The first joint 230 sits in the first channel segment 248 of the strip 224 and forms a metal joint seal against the first and second pipe ends. The first gasket 230 may be formed of any suitable material as described above in conjunction with gasket 30. In this regard the first gasket 230 is somewhat similar to gasket 30 of FIGURES 1-8, and some of these Similarities will not be described here. Referring to FIGURES 9-11, the first gasket 230 has an inner surface 326 and an outer surface 328. A stainless steel sheet can be located on the inner surface 326 as previously described for the embodiment of FIGURES 1-8, and a pressure sensitive adhesive, an integrated stainless steel structure, or some other adhesion feature can be used and / or stand on the surface

IMPI

INSTITUTO MEXICANO Dt LA PROPERTY INDL'S:?; '-.L

<img file="MX338366B_D0043.tif" />

328 exterior to pre-assemble and connect the first joint 230 to the band 224. The first joint 230 has an open and divided loop structure, and has first and second circumferential ends 315, 317. Referring to FIGURES 10 and 12, when the first joint 230 is assembled it follows the inner surface 240 of the band 224, and the first and second circumferential ends 315, 317 wrap at least a portion with the first and second flanges 244, 246 of the band. The first and second circumferential ends 315, 317 face the inner surface 240 on the first and second flanges 244, 246 and may maintain direct contact with the inner surface on the flanges (FIGURE 12) or may oppose the inner surface on the flanges through an air gap (not shown).

The second joint 231 is located against the interior surface 298 of the bridge 228 and forms a metal joint seal against the first and second ends of the pipe (although it is shown in imaginary in FIGURE 9, which sometimes indicates that a part is hidden behind or under another part). The second gasket 231 is somewhat similar to gasket 30 of FIGURES 1-8, and some of these similarities such as material will not be described here. Referring to FIGURES 9-11, the second gasket 231 has an inner surface 319 and an outer surface 321. A stainless steel sheet can be located on the inner surface 319 as described

IMPI

1N 5 TI Π J rO Μ Ε Λ i CA h! O DE LA PROKEüAP ÍNDUSTauí

<img file="MX338366B_D0044.tif" />

previously for the embodiment of FIGURES 1-8, and a pressure sensitive adhesive, or some other adhesion feature can be used and / or located on the outer surface 321 to pre-assemble and connect the second joint 321 to the bridge 228. The second joint 231 has an arcuate structure, and has first and second circumferential ends 323, 325. Referring to FIGURES 9 and 11, the circumferential ends of the second joint 231 at least partially overlap the skew cuts 303, 305 and extend in the circumferential direction beyond the bottom edges 311 of the skew cuts.

The bridge and joint assembly of FIGURES 9-13 is designed to provide a mostly uninterrupted and continuous transition and feed between the first and second joints 230, 231, and between the bridge 228 and the first joint. In other words, the assembly is designed to jointly reduce or eliminate a vertical ledge or other non-flush surface, which in some cases could deform the second joint 231 and / or cause uneven surface-to-surface contact between the clamp 210 for pipe and tubing, and therefore be a source of exhaust gas leakage. One way to facilitate a mostly uninterrupted transition is to maintain certain radial thickness relationships between bridge 228, first joint 230, and second joint 231. For example, the

<img file="MX338366B_D0045.tif" />

First joint 230 may have a radial thickness value that is greater than the radial thickness of bridge 228, and greater than the radial thickness of second joint 231. Also, the radial thickness of first joint 230 may be greater than or equal to the sum of the radial thicknesses of bridge 228 and the second joint 231. In one example, the radial thickness of bridge 228 is approximately 0.38 mm, the radial thickness of first seal 230 is approximately 1.0 mm, and the radial thickness of second seal 231 is approximately 0.45 mm. Of course, the bridge 228 and the first and second joints 230, 231 do not meet these relationships, and may have different values ​​of radial thickness for each of the bridge and the first and second joints; for example, the first joint and / or the second joint may have a radial thickness of approximately 0.6 mm.

Referring to FIGURES 12 and 13, when the pipe clamp 210 is in a tight state, the first and second joints 230, 231 are compressed together against the outer surface of the pipes (second pipe 220 shown), and the bridge 228 is buried in the material of the first joint. This is partially facilitated by meeting at least part of the radial thickness ratios described above, although it may exist in some cases without meeting the ratios. Referring to FIGURE 13, the first circumferential end 323 of the second joint

<img file="MX338366B_D0046.tif" />

231 and the confronted portion of the first joint 230 are compressed together, and the bottom edge portion 311 of the bridge 228 integrates with the confronted portion of the first joint to create a substantially uninterrupted transition section T therein and a substantially interconnected to the flush between them. This occurs at the other end of the joints and the bridge as well, although not shown.

Referring to FIGURE 14, another illustrated embodiment of a bridge and gasket assembly is shown to be somewhat similar to the bridge and gasket assembly of FIGURES 9-13, and some of these similarities will not be described here; for example, a first joint 430 is similar to the first joint 230, and a second joint 431 is similar to the second joint 231.

A bridge 428 spans a gap in band 424 otherwise continuously and protects against exhaust gas leakage therein. Bridge 428 has a first axial end 486 and a second axial end 488, and has a first circumferential end 490 and a second circumferential end 492. Similar to bridge 228, bridge 428 has a steeper and tighter curvature than band 424 .

In the illustrated embodiment, bridge 428 includes first and second triangular arms 527, 529 that extend in opposite circumferential directions with

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

<img file="MX338366B_D0047.tif" />

respect each other. A first and second axial sides 531, 533 on each of the arms 527, 529 converge with each other and towards an axial center line C of the second joint 431. The sides 531, 533 may meet at a point as shown, but not they need and can create a rounder or blunt circumferential end. In use, the potential exhaust gas leak is drawn and migrates along the sides 531, 533 towards the axial center line C and is therefore prevented from leaking from the joint.

Similar to bridge 228, bridge 428 is connected to reaction block 470 by, for example, spot welds 513. The second joint 431 is shown in imaginary and is located on the inner surface of the bridge 428. The second joint 431 has circumferential ends that extend in the circumferential direction behind the first and second arms 527, 529. And, bridge 428 may possess the radial thickness ratios described above for bridge 228, and in a tight state the joints 430, 431 are compressed and the bridge 428 is integrated into the material of the first joint.

It will be understood that the foregoing description is not a definition of the invention, but a description of one or more preferred exemplary embodiments of the invention. The invention is not limited to the particular embodiments described herein, but rather is defined only

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by the following claims. Furthermore, the statements contained in the foregoing description refer to particular modalities and should not be construed as limitations on the scope of the invention or on the definition of terms used in the claims, except where a term or phrase is expressly defined in the foregoing. Various other modalities and various changes and modifications to the described modalities will become apparent to those of skill in the art. All other modalities, changes and modifications are intended to come within the scope of the appended claims.

As used in this specification and the claims, the terms for example, say, and such as, and the verbs it comprises, has, includes, and its other verb forms, when used in conjunction with a list of one or more components or other terms, each should be interpreted as not limited meaning, as the list will not be considered as excluding other additional components or terms. Other terms will be interpreted using their broadest reasonable meaning unless they are used in a context that requires a different interpretation.

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