Improved piston and driver assembly
Abstract
This record has no abstract on file.
Term
Term ended
Expired 9 August 1999, 27.1 years ago.
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20 claims: 3 independent, 17 dependent
- 1R ΐ I Υ I N D I CA S_flE-S li - Conjunto de êmbolo e accionador de grampeadores aperfeiçoado para utilização em máquinas de grampear, caracterizado pelo facto de incluir um corpo de êmbolo;um calço de êmbolo removivelmente montado e fixado no interior do referido corpo do êmbolo;e um accionador interligado e fixado no referido calço.
- 22· - Conjunto de êmbolo e accionador, de acordo com a reivindicação 1, caracterizado pelo facto de o referido êmbolo incluir superfícies superiores e o mencionado calço compreender uma parte superior afunilada que encaixa nas citadas superfícies superiores do referido êmbolo. 31 - Conjunto de êmbolo e accionador, de acordo com a reivindicação 2, caracterizado pelo facto de o referido corpo do êmbolo incluir um furo inclinado que abre para cima e o mencionado calço incluir uma parte trancocónica que se prolonga para baixo e com conicidade para dentro a partir do citado topo afunilado,
- 34· - Conjunto de êmbolo e accionador, de acordo com a reivindicação 3, caracterizado pelo facto de a referida parte trancocónica incluir superfícies que encostam e assentem no referido furo cónico.
- 45· - Conjunto de êmbolo e accionador, de acordo com a reivindicação 4, caracterizado pelo facto de o referido corp© incluir um furo roscado por baixo do mencionado furo inclinado e o citado calço incluir uma parte roscada macho para encaixe de ligação operativa com oa fios de rosca existentes no citado corpo do êmbolo.
- 56© - Conjunto de êmbolo e accionador, de acordo com a reivindicação 5, caracterizado pelo facto de o referido calço ser ranhurado e o mencionado accionador compreender uma lâmina que tem uma parte superior afunilada para cima, colocada na mencionada ranhura e que se conforma aproximadamente com a forma da referida parte troncocónica do referido calço em áreas adjacentes às suas superfícies.
- 67· - Conjunto de êmbolo e accionador de acordo com a reivindicação 6, caracterizado pelo facto de incluir um furo transversal através da parte troncocónica do referido calço e a parte afunilada superior da lâmina nele montada. ► É / fc í
- 78» - Conjunto de êmbolo e accionador de acordo com a reivindicação 7, caracterizado pelo facto de incluir um perno inserido no referido furo transversal que fixa a mencionada lâmina no citado calço.
- 89© - Conjunto de êmbolo a accionador de acordo com a reivindicação 8, caracterizado pelo facto de a referida ranhura terminar próximo do mencionado topo afunilado do citado calço e a referida parte superior afunilada d( accionador encostar à parte de baixo do mencionado topo afunilado do citado calço,
- 910· - Conjunto de êmbolo e accionador de acordo com a reivindicação 5, caracterizado pelo facto de paj tes do referido topo afunilado, da mencionada parte troncocónica e da citada parte macho roscada do referido calço de êmbolo encostarem operativamente a superfícies respectivas do mencionado êmbolo para fixarem o citado êmbolo e o referi do accionador no e em relação ao mencionado êmbolo.
- 1011· - Conjunto de êmbolo e accionador de acordo com a reivindicação 10, caracterizado pelo facto de o referido calço ser ranhurado e a mencionada lâmina do accic nador ser colocada dentro da citada ranhura e se prolongar para fora a partir do referido êmbolo e o mencionado furo roj cado do citado êmbolo ter dimensões menores do que a referi da parte macho roscada do mencionado calço, comprimindo a citada parte roscada macho a referida ranhura de enôontro à mencionada lâmina accionadora quando o citado calço é aparafusado no referido êmbolo.
- 1112· - Conjunto de êmbolo e accionador, de acordo com a reivindicação 2, caracterizado pelo facto de o referido êmbolo incluir superfícies superiores, uma parte das quais define uma área solta na mencionada parte superior do êmbolo, sendo o citado topo afunilado do referido calço colocado dentro da mencionada área em relevo de tal maneira que o citado topo afunilado fique no mesmo plano que o topo do referido corpo do êmbolo.
- 1213· - Conjunto de êmbolo e accionador de grampos para utilizar numa máquina de grampear, caracterizad< pelo facto de compreender um corpo de êmbolo que tem um furo rosòado e um furo com inclinação para fora que se prolonga a partir do referido furo roscado;um calço de êmbolo colocado no mencionado furo roscado e no citado furo incllAado e que inclui uma parte macho roscada que é aparafusada no referido furo roscado e uma parte troncocónica que tem superfícies que cooperam e encostam no mencionado tubo inclinado;uma ranhura longitudinal no citado calço através da referida parte macho roscada e da mencionada parte troncocónica;e um accionador colocado na citada ranhura, encostando o referido calço com atrito e mantendo o mencionado accionador.
- 1314· - Conjunto de êmbolo e accionador de, acordo com a reivindicação 13, caracterizado pelo facto de o referido furo roscado ter umas dimensões menores do que a mencionada parte macho roscada de tal maneira que o citado calço fica comprimido no referido accionador quando o mencionado calço é roscado no citado êmbolo. B EB·:
- 1415® Conjunto de êmbolo e accionador, de acordo com a reivindicação 14, caraterizado pelo facto de o referido calço incluir um topo afunilado que tem um diâmetro maior do que a mencionada parte troncocónioa, prolongando-se a citada ranhura através do mencionado calço pelo menos até ao citado topo afunilado.
- 1516a - Conjunto de êmbolo e accionador, de acordo com a reivindicação 15, caracterizado pelo facto de incluir um furo transversal através da referida parte tron cocónica e do mencionado accionador e um pernp colocado no citado furo transversal para manter o referido accionador na mencionada ranhura e no citado calço.
- 1617· - Conjunto de êmbolo e accionador, de acordo com a reivindicação 15, caracterizado pelo facto de o referido êmbolo ter uma área em relevo na mencionada superfície superior e o citado topo afunilado do referido calço ficar colocado dentro da mencionada área em relevo da citada superfície superior.
- 1718» - Conjunto de êmbolo e accionador, de acordo com a reivindicação 14, caracterizado pelo facto de o referido furo inclinado no mencionado corpo de êmbolo ter umas dimensões menores do que a citada parte troncocónica do referido calço.
- 1819» - Conjunto de êmbolo e accionador, de acordo com a reivindicação 13, caracterizado pelo facto de o referido accionador compreender uma lâmina accionadora que tem uma parte superior com margens que se conformam com a forma troncocónica da mencionada parte troncocónica do citado calço.
- 1920» - Conjunto de êmbolo e accionador para utilização numa máquina de grampear, caracterizado pelo facto de incluir um corpo de êmbolo;um calço de êmbolo colocado no interior do corpo de *ί“ êmbolo;e um accionador fixado dentro do mencionado calço de êmbolo e dentro do citado corpo do êmbolo, incluindo o referido corpo do êmbolo um recesso de menores dimensões do que o mencionado calço para receber o citado calço e apertar o citado calço quando o referido calço ê introduzido no mencionado corpo do êmbolo e para apertar o citado calço em volta do referido accionador e fixar por atrito o referido accionador no mencionado calço. I I I !!
- 2021 8 - Conjunto de êmbolo e accionador de acordo com a reivindicaçSo 20, caracterizado pelo facto de o referido accionador compreender uma lâmina de accionamento plana e o mencionado calço ser, pelo menos parôialmente, bifurcado originando duas pernas do calço, tendo a referida lâmina de accionamento uma parte que fica dentro da bifurcação do mencionado calço entre as citadas pernas. Xisboa, 9 de Agosto de 1984 0 Agente Oficial da Propriedade Industrial
Independent claims20
69 paragraphs in 1 section, as filed
DESCRIPTION OF THE INVENTION for an "Enhanced Actuator Embedded Assembly" featuring
SENCO PRODUCTS, INC., North American, industrial and commercial, based in 8485 Broadwell Road, Cincinnati, Ohio 45244, United States of America
RESUME
The present invention relates to an improved plunger and actuator assembly for use in stapling machines (10), characterized in that it includes a synthetic plunger body, a forked plunger pad (12) and a fixed plunger (22). into the shim by means of a bolt and by frictional engagement of the actuator on the piston shim when the shim is mounted on the piston body. 0 Piston pad has an enlarged upper portion to dissipate operating pressures on the piston body.
The present invention relates to plungers for use in stapling machines and more particularly to combined plungers and actuators for use in stapling machines.
In the application of staples, such as nail staples, it is known that staples can be fed in series to a drive station under a piston and associated actuator such that when, for example, pneumatic pressure is applied above the piston, it is driven to move the actuator against the clamp and thus serves to apply the clamp within and through suitable materials. Such a stapling machine is described, for example, in U.S. Patent No. 3,170,487.
The typical machine for applying clamps works at a pressure range of from about 4.9 kg / cm to about 8.4 kg / cm<sup>2</sup> (About 70 psi to about 120 psi) and larger or heavier machines give an energy of 6.3 to 6.9 kgm (45 to 50 pounds, for example, by applying staples. The unit consisting of the piston and actuator * is subjected to great forces and forces, particularly at the junction of the piston and the actuator. First, pneumatic pressure is applied instantaneously to the plunger, seeing the inertia of the plunger and actuator at rest and pushing them down toward a clamp. The abutment of the clamp and subsequent actuation of the clamp exerts effort on the clamp and is transmitted to the plunger. Also, when the plunger reaches the bottom of its stroke, it abuts an end-stroke of elastomeric material that abruptly stops the plunger while the inertia of forward movement of the actuator forces the plunger / actuator connection towards the end. opposite before the plunger rises to take another stroke.
Occasionally, a staple machine works dry or operates without driving a staple such as when the machine is being tested or when the machine works without stapling because the staple supply has run out. In this case, the piston ® at the elastomeric end of stroke at the end of its stroke with even greater forces, shocking the piston and actuator and fatigating the parts and tensioning the components, particularly the piston connection to the actuator. Consequently, these normal operating pressures and energies applied to the piston and its associated actuator exert pulling forces which, over a prolonged course of use, may eventually lead to piston or actuator failure.
More particularly, it is typical to attach the actuator, such as a drive blade, directly to the piston. The actuator is surrounded by a protrusion extending from the piston and accommodating the actuating blade and a stem is inserted through the protrusion and the actuator. It is in the area of coupling of the drive blade with the piston near the pemo that damage typically occurs as a result of the above efforts.
Accordingly, it is an object of the present invention to provide an improved piston and actuator combination.
Another object of the present invention is to provide an improved piston assembly and associated actuator which minimizes or dissipates the stress generated by operating forces and increases the duration of the piston and actuator.
As mentioned above, the plunger and actuator in a pneumatic clamp machine are accelerated to a desired speed in order to bury a clamp of suitable material. For a particular material and a determined clamp length a certain speed is required to ensure proper drive of the
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clamp to proper depth. Accordingly, it is understood that if the piston and actuator can be light in weight, the energy required to overcome the inertia of the reciprocating piston and actuator is not so large and less energy can be used to achieve the same. or higher driver speeds.
Accordingly, it is a further object of the present invention to reduce the weight of the combined piston and actuator assembly by use of an improved piston and actuator structure and thus to reduce the energy required to operate the clamp machine for a particular use.
For these purposes, an embodiment of the invention provides for the use of a synthetic piston body, a piston insert and an actuator fixed to the piston body by means of the insert. The actuator is fixed in a manner that dissipates operating voltages over larger areas than immediately surrounding the actuator / piston bolt.
In more detail, the piston body includes a circular piston having a hole centrally positioned therethrough. A lower part of the hole is threaded while an upper part of the hole is inclined, opening upwards and outwards from the piston. The top of the plunger body comprises an upper surface having a relief area, preferably concentric with the bore through it.
The piston insert includes a threaded lower male portion and an upwardly extending frusto-conical portion having the smallest diameter area adjacent the threaded portion. The insert includes a swollen top of larger diameter than the trunk portion. A prolon5 longitudinal slot
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It is passed through the threaded portion and into the trunk portion to an enlarged top near the end of the groove. An actuator, such as a flat drive blade, having an upper part shaped like a straight section of the groove through the piston insert, is fixed to the piston insert by a bolt extending through the frustoconical portion of the piston insert and from the top of the drive blade. 0 The top of the drive blade is seated against the end of the slot adjacent the enlarged top of the insert.
Preferably, at least the threaded portion of the piston body is slightly smaller in size than the male threaded portion of the piston insert.
As a result, when the plunger insert is screwed into the plunger body, the insert is thus forced into the drive blade to frictionally engage the drive blade and to keep the drive blade securely within the insert. not only by the bolt extending therethrough but also by the frictional engagement of the applied actuator achieved by mounting the insert in the piston body.
The preferred embodiment of the present invention has a number of advantages. Specifically, the frictional engagement of the insert against the drive blade, for example, serves to spread any forces acting on the drive blade or the plunger or the plunger insert over a much larger area than immediately surrounding it. the stud. While the bolt serves to connect the actuator to the insert, it does not support all the effort exerted by one part relative to the other and the area of the actuator immediately surrounding the bolt is not overloaded.
As a consequence, the drive blade is more
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taken more securely within the insert and within the plunger. The stress exerted on the areas immediately surrounding the pin hole in the drive blade spreads over a larger area and is relieved, thereby reducing drive blade fatigue and premature rupture.
In addition, the top of the enlarged insert, which rests on the upper parts of the piston body, serves to spread normal pneumatic operating forces over a substantial area of the piston body, thereby distributing the actuating forces over the entire structure. This dissipates forces applied to the piston and drive structure over the entire unit and eliminates force concentration in any small area of the piston or insert.
The enlarged top of the insert is preferably seated in the corresponding relieved area or recess in the top surface of the piston body. This relieved assembly lowers the final position of the insert relative to the piston body. The piston seal, such as a tertiary washer, can be mounted closer to the top of the piston, effectively reducing the volume of the chamber above the piston before firing, thereby promoting efficiency.
These and other advantages will be appreciated by reading the following detailed description of an embodiment of the present invention and observing the drawings, in which Figure 1 is a cross-sectional view of a typical clamp drive machine having the piston and actuator. In accordance with the present invention;
Figure 2 is an enlarged cross-sectional view of the piston and actuator of Figure 1; and
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Figure 3 is a cross-sectional view of the piston and actuator taken along lines 3-3 of Figure 2.
Turning now to the drawings, they represent a pneumatically operated stapling machine or gun 10. Such a machine can be, for example, a stapling machine as shown in United States Patent Νβ 3 170 487 which, to As part of the piston and actuator as referred to herein, it is not part of the present invention. The illustration of a staple driver 10 of Figure 1 is provided for illustrative purposes only to show how the plunger and actuator are generally used. Of course, the staple retainer with which it is used is not shown in Figure 1. the stapling machine 10.
In use, pressurized fluid such as air is introduced into area 10 above the plunger and actuator 12 of Figure 1, whereby the plunger and actuator 12 are accelerated downward as shown in Figure 1, for the purpose of driving a clamp as is commonly known in the art. After reaching the elastomeric material damper 13, the piston and actuator 12 are forced to stop and then returned to their upper position shown in Figure 1 for a new clamp drive cycle.
As shown in the drawings, the stapling apparatus and the plunger and actuator are arranged in a vertical position as when pushing down a staple. Please note that, in the following description, reference to terms such as down, top or up is made in relation to this orientation for description purposes but that the stapling apparatus and the piston and actuator may be inverted or arranged horizontally or in accordance with other arrangements.
Turning now to the description of the piston and actuator combination 12, attention is directed to Figure 2 where the unit formed by the piston and actuator unit 12 is shown in great detail. The plunger and actuator 12 include a plunger body 20, a plunger insert 21, a driving blade 22 and a bolt 23. The plunger body 20 preferably comprises a disc-like portion 26 and a downwardly extending protruding portion 27 . A circumferential groove 28 is provided around the disc-like portion 26 for receiving a sealing O-ring 29 (shown only in Figure 1). This seal works to seal the piston against the cylinder walls of the clamp application apparatus.
The piston body 20 also includes an interior passage or bore 35 comprising an upwardly sloping bore 36 and a threaded bore 37 extending downwardly from the upwardly inclined bore 36. The upper surface of the piston body 20 also includes a circular recess 38, the function of which will be described below.
Plunger insert 21 Includes a swollen top 40, a downwardly sloping tapered portion 41 extending inwardly from the swollen top 40 and a straight threaded portion 42. Insert 21 has a groove or is bifurcated as shown in FIG. Figure 2, effectively dividing the insert through the threaded and frusto-conical parts into two semi-cylindrical or semitronchronic legs. This slot or fork is called 43.
The actuator or drive blade 22 has an upper end 45 that substantially conforms to the cross-sectional shape of the piston insert 21. This relationship is best seen in Figure 3, where the upper 45 end of the drive blade 22 should be supported. against the enlarged top 40 of the piston insert 21.
Although the plunger components may be made of any suitable material, one material that may be considered appropriate for the plunger body is a polyester elastomeric material manufactured by Dueton Corporation under the trademark 'ΉϊΤΚΕΙι', Type Νδ 6345. This material has good overall shock resistance. 0 Plunger insert can be made of hot or soft rolled Νδ 1020 steel with carbon nitride for surface grinding, while the drive blade can be made of spring steel such as alloy steel Νδ 6150.
In accordance with the present invention, the threaded bore 37 of the protrusion 27 of the piston body 20 has a slightly smaller diameter than that of the corresponding right-hand threaded portion 42 of the piston insert 21. In addition, the inclined surfaces of the piston portion should be inclined. The tapered insert 41 of the piston insert 21 has a shape substantially in accordance with the inclined shape of the hole with the upward opening 36 of the piston body 20.
When the plunger and actuator are mounted, the top or top end 45 of the drive blade 22 is inserted into the groove 43 of the piston insert 21 such that the top end 45 of the drive blade 22 preferably rests on the enlarged top 40. As much material as possible above pin 23 should be provided to strengthen the blade in this area. Therefore and depending on the particular size of the plunger and the plunger insert and the position of the pin 23, the swollen top 40 may have a groove to a desired depth for receiving the upper end 45 of the drive blade 22. This allows a significant amount of the drive blade material is over pin 23 to reduce
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the fatigue of the drive blade above the pemo. Deformation occurs in this area for example when the piston and actuator are pushed down and the drive blade 22 tends to continue its forward movement after the piston body 20 has been stopped, for example by touching a shoulder or end. the stapler.
Once the drive blade 22 is inserted into the piston insert 21, the piston insert 21 is screwed into the piston body 20. As the threaded hole 37 is slightly smaller in size than the right threaded portion 42 of the piston insert, this mounting operation works to tighten the bifurcated legs of the piston insert 21 'together and tightly against the drive blade 22 thereby improving the frictional engagement of the insert 21 into the drive blade 22. 0 continuous movement of the plunger insert 21 into the plunger body 20 thereafter plunges the plunger insert 21 into passage 35. The frusto-conical surfaces of plunger insert 21 engage the inclined passage or bore 36 and serve to further tighten the piston insert 21 against the drive blade 22.
When the plunger insert 21 is completely seated on the plunger body 20, it is preferable that the swollen top 40 is within recess 38 of the plunger body 20 rather than extending over it.
This eliminates any projections over the top surface of the piston body 20 and allows the groove 28 to be located as high as possible in the piston body 20, thereby effectively decreasing the volume of the expandable chamber above the piston and promoting drive efficiency. and initially the acceleration of the piston, as is convenient.
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It is also convenient that the inclination of the upwardly opening hole 36 and the inclination of the frusto-conical surfaces 41 of insert 21 are approximately 15Â ° to the vertical as shown in the drawings. This inclination is suitable for promoting movement within forked legs of insert 21 against actuator blade 22, while at the same time reducing the amount of plastic material that has to be removed in order to form the passageway receiving the insert. Using as much plastic as possible contributes to the greater overall mechanical strength of the plunger body and, although other angles can be taken, it is preferably believed to be about 15Â °. This inclined engagement also serves to dissipate the forces exerted on the insert over a large part of the piston body.
It is also convenient for the flanged or swollen top 40 of the piston insert 21 to extend outwardly from the passage 35 and into recess 38 over a substantial portion of the piston body. Accordingly, when pneumatic pressure is introduced above the piston, the pneumatic pressure acting on the swollen top 40 dissipates from the swollen top as well as the swollen portion of the insert over a substantial portion of the piston body 20 and mechanical stress. downward is not exerted precisely on the insert 21 relative to the plunger but also on the plunger body 20, thus decreasing the tendency for the plunger insert 21 to push through the plunger body 20, for example.
With respect to mounting the plunger insert 21 into the plunger body 20, it is convenient that the swollen top 40 of the insert 21 may be of any shape so as to permit the application of a tool to screw the insert into the plunger body 20. As shown Figure 2, at the tapered top 40, provide holes for a screwdriver to tighten the insert in the piston body 20. Other means could also be used for this purpose.
It is convenient that, in use, when the plunger and actuator are actuated downwardly, the actuating blade 22 abuts a clamp and pushes it into or through the stapling material. When the plunger is acting downward with the actuator abutting the clamp, downward forces are exerted on both the top of the plunger insert 21 and the plunger. This force is resisted by the opposite forces produced by the thrust clamp thrust. These opposite forces are transmitted through the drive blade 22 to the plunger insert by frictionally inserting the insert 21 into the drive blade 22 and by means of the insert. from the top of the actuator blade 45 at the upper end of the piston insert 21. These forces may also be at least partially supported by the engagement of the drive blade 22 with the stem 23 around the surfaces of the hole 48 in the blade 22. Due to the friction pop engagement of the drive blade 22 with the insert 21 and the direct top engagement of the The insert driver, however, forces spread over an area substantially larger than the area immediately surrounding the hole 48 of the drive blade 22. Thus, the stress on the drive blade 22 dissipates from any particular focal point, thereby increasing the duration and fatigue strength of the drive blade 22. As a result, the immediately surrounding portion of the drive blade The stud 23 is not overloaded.
Once the plunger is pushed to its lower position and abuts for example the elastomeric shock absorber 13, it would be expected that the insert of the lip body 21 and the drive blade 22 would normally be subjected to shock as a result of the abrupt stop. and unit inertia. Instead of the shock being completely supported by stud 23 β by the area of the drive blade immediately around the pin 23, the plunger according to the present invention tends to dissipate these forces throughout the upper part of the drive blade 22, including the part that is frictionally engaged by the piston insert 21, relieving very strongly concentrated stresses in the bore 48 immediately surrounding the bolt 23. This structure thus serves to dissipate fatigue efforts over a large area and increase component life.
It is also convenient that the piston, being made of a synthetic material at least in its body, can be manufactured to have a slight weight. This reduced weight or mass translates into a small inertia that must be overcome to accelerate the piston to a desired drive speed. Therefore, once the driving force of the clamp has been calculated, it is convenient that less pneumatic force is required to give a given driving speed to push a single clamp into a given material compared to higher weight pistons. This results in greater piston and actuator acceleration in accordance with the present invention. At the same time, the improved piston and actuator assembly as described serves to dissipate fatigue forces throughout the entire piston and actuator structure and thus to extend both piston and actuator life.
of
These and other advantages and modifications will be readily apparent to those of ordinary skill in the art, without departing from the scope of the present invention which is defined by the following claims only.
<img file="PT79052B_D0011.tif" />
R ΐ I Υ INDI CA S_flE-S
26 members in 15 offices
Priority claims1
| Document | Office | Kind | Date |
|---|---|---|---|
| 52264583 | United States of America | A |
Members26
| Document | Office | Kind | |
|---|---|---|---|
| FI843146A0 | Finland | A0 | |
| DK386384D0 | Denmark | D0 | |
| PT79052A | Portugal | A | |
| GR80038B | Greece | B | |
| DK386384A | Denmark | A | |
| FI843146A | Finland | A | |
| NO843216L | Norway | L | |
| AU3138484A | Australia | A | |
| EP0133813A1 | European Patent Office (EPO) | A1 | |
| ZA846002B | South Africa | B | |
| JPS6062471A | Japan | A | |
| US4530455A | United States of America | A | |
| ES535093A0 | Spain | A0 | |
| ES8604445A1 | Spain | A1 | |
| PT79052BThis record | Portugal | B | |
| NZ209098A | New Zealand | A | |
| AU565818B2 | Australia | B2 | |
| CA1227901A | Canada | A | |
| EP0133813B1 | European Patent Office (EPO) | B1 | |
| AT32575T | Austria | T | |
| ATE32575T1 | Austria | T1 | |
| DE3469418D1 | Germany | D1 | |
| NO158172B | Norway | B | |
| NO158172C | Norway | C | |
| FI79254B | Finland | B | |
| FI79254C | Finland | C |
Numbers
- Application
- 79052
Titles
- English
- IMPROVED PISTON AND DRIVER ASSEMBLY
Classification
- CPC, 2
- F16J1/12
- B25C1/047
- IPC, 2
- B25C1 04
- F16J1 12