Compression band

The invention relates to a device for clamping a hose on a nipple or the like., Which consists of a hose comprising the band and two closure parts, wherein the one closure part for

Anchoring by inserting and bending back the one band end has a slot and a

Claw connection between the band and closure member is provided and the closure parts by a

Screw bolt connected together and are mutually movable.

It is a device of this type is known in which the ends of the band are firmly connected by means of a claw connection with the closure members and the closure members by means of a bolt for tightening the band are mutually movable. This device can therefore be used disadvantageously only for a specific hose diameter.

It has also been proposed a hose clamp in which a perforated metal strip is used, which firmly attracts the band laid around the tube by means of a separate closure member with compressible bulge. Although in this band clamp only a perforated piece of tape is necessary, which is cut off according to the respectively desired length of a supply roll, their applications are limited because the perforations have to have a certain mutual distance with respect to the required strip strength and further the compression of the bulge of the closure member can produce the required clamping effect only for a very limited range of tube sizes.

The aim of the invention is now to avoid the mentioned disadvantages of the known devices and to provide a clamping device which has a very simple construction, inexpensive to manufacture and easy to install and regardless of the size of the clamped hose is applicable.

The device of the invention is characterized in that the slot of the closure member, as known per se, is directed approximately perpendicular to the hose facing surface of the closure member and the closure member claws for engaging in apertures provided in a conventional manner in the band are.

In a preferred embodiment of the device whose closure parts have a bottom part and side parts and the side part of a closure member is provided with a through hole, according to the invention consist of the bottom part of a bottom plate and the side parts of two side walls and a spacer arranged between the walls, said the two spacers have the bores, and wherein a bore is formed as a threaded bore. According to further features of the invention, in this device, the bottom plates may each have tongue-shaped extensions which overlap in the position of use of the device and serve as a guide for the closure parts when tensioning the tape, wherein the width of a tongue-shaped extension can decrease towards the end.

The perforated band can be divided into several sections, which are joined together by elastic fasteners and give the pressure band a self-tensioning effect, which is necessary in certain cases, for example in fast-fluctuating tube pressures, or to compensate for the aging of the tubing.

In the drawings, the subject invention is shown, for example. It show Fig.l in perspective view of the device, Figures 2 and 3, the assembled closure parts in view or Top view, Figures 4 and 5, the two closure parts in perspective view, Figure 6 shows the individual parts of an elastic connecting element for the connection of two band sections in perspective view and Figure 7 connected by the connecting element band sections in perspective view.

In the drawings, in which like parts are numbered alike, there is designated by -10- a hose which is to be clamped onto a solid metal part -11-, for example a nipple. With -20- is designated a perforated belt, which is provided with openings -21-. This band consists of a suitable steel, wherein in each case the required strip length can be cut from a supply roll.

The two ends of the band -20- are tightened on the tube -10- by means of a closure -30- which consists of two parts -30a, 30b- (Figs.2 to 5). The two parts are held together by a bolt -31- and tightened. Each of the parts -30a and 30b- has two lateral walls -31a, 32a and 31b, 32b- which are formed by a right-angled bend of the central floor panels -33a and 33b-, respectively. The floor panels -33a and 33b- may be provided with a slight bend in the circumferential direction of the band so that they more easily conform to the curvature of the item to which they must be mounted. The side walls -31a, 32a and 31b, 32b- are provided with aligned openings -45-, which serve for receiving the pins -35a, 35b- (Figure 3) of cylindrical spacers -34a and 34b-, wherein the pins are secured in the openings -45- in any known manner. The spacer -34a- is provided with a smooth bore -36a which is transverse to its longitudinal direction, while the spacer -34b- has a threaded bore -36b-. The central base plate -33- has at one end a tongue-shaped extension -38a- and at the other end a protection -37-, through which the tape can be inserted therethrough and then bent back, as will be described later. The

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No.311752 tongue-shaped extension -38a overlaps the extension -38b- of the other closure member -30b- according to Figure 5. Part -30b- is also provided with a second extension -39b- which has punched-out claws -40-, two of which are shown in the drawings. In the

Circumferentially curved extensions -38a, 38b and 39a, 39b- have the same curvature as the bottom plates -33a and 33b-, as shown in FIG.

The assembly and the operation of the device will be explained in more detail below.

First, the end -20- of the band -20- is inserted from above through the slot -37- and then bent back, as shown in Fig.l shows. The closure -30- consisting of the two parts -30a, 30b- and the bolts -31- was previously assembled by the tongue-shaped extension -38b- pushed over the tongue-shaped extension -38a- and the bolt -31- in the borehole - 36a and engaged with the threaded hole -36b- is engaged.

The width of the tongue-shaped extension -38b- decreases towards the end, as indicated at -38 'and 38 "in Figs. 3 and 5, so that the extension can be easily inserted between the lateral parts of the part -30a , As a next step, the tape's end -20b- is passed through apertures formed on the one hand by the spacer -34b-, the side walls -31b and 32b- and the bottom plate -33b- and on the other hand by the spacer -34a-, the side walls -31a and 32a and the bottom plate -33a- are formed. The band -20- is then placed as tight as possible around the tube -10-, with the claws -40- with the nearest breakthrough -21- can engage. The claws -40- are stamped so that they are inclined in the direction of the clamping movement and facilitate the assembly. After the claws -40- are hooked in the corresponding perforations -21-, the bolt -31- is rotated by means of a simple screwdriver until the bolt head -31'- abuts the spacer -34a-, whereupon by the further rotation of the bolt Parts -30a and 30b- are tightened and the band -20- tightened around the hose -10- is tightened until the desired contact pressure is reached.

In order to remove the pressure band, only the bolt -31- has to be turned back until the band -20- with its openings -21- can be released from the claws. One of the main advantages of the device is that the tape can be mounted and removed without destroying a part.

In certain applications of the device, it may be desirable for a portion of the band to have self-adjustable spring elasticity to compensate for frequently changing pressures within the tube or aging of the tube. Since the closure -30- is not elastic, the band -20- can be divided into sections -20 'and 20 "- which are connected together by an elastic omega-shaped coupling element -50- (Figures 6 and 7). The coupling element has a bulge -51-, two attached to this at -54- rag -52, 53- and an elastic pin -55- rubber, plastic or the like. on. The band sections -20 'and 20 "- are at their

Ends with openings - 21 '- provided, which protrude into the bulge - 51 -. If forces occur that increase the diameter of the printing band, the transverse edges -21 "- the

Breakthroughs -21'- the band portions -20 'and 20 "- with the bends -54- in engagement and there exert a pressure that acts against the natural spring force of the bulge -51-. As a result, an elastic spring force counteracts any change in the band diameter or compensates for the changes in the band circumference magnifying force.