HK1195605B - Hose clamp - Google Patents

Description

State of the art

An open hose clamping with the characteristics given in the general term of claim 1 is known from US 4.299.012, where the ear-shaped clamping device is designed to keep the clamping in the tensioned state given to it when mounted on the object to be clamped.

US 4.053.965 describes an open tube clamping in which the end sections of the clamping band are equipped with interlocking toothed areas in the overlapping state. A clip not described therein is used to keep the end areas interlocking. A clip is known from US 3.078.532. US 1.804.725 describes another tube clamping in which a first toothed area provided on the outside of a tongue works together with a second toothed area formed on the inside of a raised area. All tube clamps working with this denture can be assembled by free pulling at the outer end of the clamping.

From CH 580 779 A and JPH 11-223287 (Figure 12) a hose clamping is known according to the general concept of claim 1.

The invention is discontinued

The purpose of the invention is to eliminate at least part of the disadvantages which comparable clamp systems have in the present state of the art. A more specific purpose of the invention is to specify a clamp system which can be easily tightened to the desired holding force and which can safely maintain this holding force in the mounted state.

The solution to this problem is the tube clamping defined in claim 1. In this case, the ear-like clamping device is only used to clamp during installation, which can be done automatically or manually with a tool common to ear clamps, such as a pin, which can also produce high holding forces easily. In the mounted state, the holding forces obtained during clamping are absorbed by the interlocking teeth, while the ear is relieved of forces. Since the gear, which acts like a lock, is located outside the ear area, the installed tube clamping can safely perform its function even if the ear is still protruding outwards, which is damaged after the end.

The double-gear, as described in claim 2, has the advantage of reducing the force required to stamp the teeth.

The training according to claims 3 to 5 results in a well-handled hose clamping without a dangerous protruding outward clamping end.

The closing device referred to in claim 6 provides a secure mutual guidance of the two clamping band end sections in the band-length direction.

The design according to claims 7 and 8 is designed to prevent the extension of the mounted clamps, for example due to material fatigue.

Further measures to improve the practical use and handling of the hose clamps are given in claims 9 to 11.

A brief description of the drawings

The following illustrations illustrate examples of the invention: Fig. 1 a side view of a hose clamp according to a first example of the design in the closed but not yet tensioned state;Fig. 2 and 3 perspective representations of the hose clamp according to Fig. 1, seen from opposite sides;Fig. 4 and 5 perspective representations of the hose clamp according to Fig. 1 in the stretched state, seen from the closed inner or outer clamp side;Fig. 6 and 7 enlarged drawing views of parts of the hose clamp according to Fig. 1 to 5;Fig. 8 to 10 similar representations of a hose clamp according to a further variant;Fig. 11 an enlarged view of a part of the hose clamp according to Fig. 10 in the stretched state;Fig. 12 and 13 enlarged and detailed representations of a clamp.

Examples of implementation

Err1:Expecting ',' delimiter: line 1 column 1066 (char 1065)

The longitudinal slot 14 in the first toothed area 15 means that the force of the dentition can be reduced.

The tube clamps, when closed in the supply state, are positioned axially on the object to be clamped, e.g. a tube pin with a suspended end of the tube, and then the tube clamps are tightened by tightening the ear 24 by means of an automatic or manual clamping tool, e.g. a pin 25 attached to the two thighs, the two toothed areas 15 and 23 being engaged. This action causes the tube clamps to lock in the tensioned state, relieving the ear 24 now outside the tensioned area. Even damage to the outward-pointing ear no longer has a significant effect on the function of the tube clamps.

In the closed condition of the hose clamp shown in Figures 1 to 3, the guide nozzle 13 on the inner clamp band 11 is at the beginning of the guide slot 20 within the raised area 22. During the clamping operation, the tongue 12 moves into the section below the deck area 19, being guided by the continuation of the guide slot 20 therein until the subsequent area of full clamp bandwidth approaches the stage 21. In this condition the object to be clamped is essentially surrounded by the full width of the hose clamp band over its entire gap and stepless area.

As shown in Figures 2 and 7, the clamping tape may bear a mark 30 on the side of the deck area 19 at the guide slot 20 to indicate the position of the guide nozzle 13 and thus to indicate the visibly tense condition of the hose clamping.

The example shown in Figures 8 to 10 differs from that shown in Figures 1 to 7 in that the first toothed area 15 is formed at the inner end of the clamping band on the tongue 12 and the second toothed area 23 is correspondingly more distant from the ear 24. In this design, which is particularly suitable for larger clamping diameters, the clamping device (ear 24) and the locking device (toothed areas 15, 23) are well decoupled from each other, so that unintended unlocking is safely avoided.

In addition, within the tension area of the clamping band 10, a drop-shaped, radially open recess 31 is provided, the edge of which lies entirely within the clamping band and its width decreases away from the centre of the clamping band measured in the band-length direction. As shown in the example shown in Figure 11, the edge of the recess 31 may be reinforced by a circular sieve 32. During the tension movement of the hose clamping, material from the object to be clamped (hose) is pushed into recess 31, which is forced into the rejuvenating part of the drops with the opposite movement, thereby preventing movement in this direction.

Figures 8 to 10 show that the deck area 19 for the tongue 12 is strongly arched out from the clamping band 10 to safely accommodate a longer tongue end resulting from a larger range of tension.

In the case of the variant shown in Figures 11 to 13, the supporting handle 16 is fitted with a guide finger 33 which, when the hose clip is closed, intervenes in a gap 34 open to the ear 24 of the supporting handle 27 so that the inner clamping band 11 can be guided in the direction of the hose clip even without the guide nozzle 13 on the tongue 12 in the first example.

The characteristic (stress marking) described in Figures 1 and 7 may be provided in all the examples and variants described above; the measure to guide the inner clamping band described in Figures 11 to 13 may also be applied in the examples shown in Figures 1 to 7 and 8 to 10; and the measure to prevent the effects of the clamping being felt in Figures 9, 10 and 11 (drip-forming) may be applied in all the examples.

Reference mark

10Clamping band11Inner clamping band 12Tongue13Forearmose14Long lock15First toothed area16Supporting hooks17Guidance hooks18Security hooks19Deck area20Guidance slot21Level22elevated area23Second toothed area24Ear25Limbs26Step27Supporting hook 28Guidance hook 29Outer clamping band 30Marking31Depthening32Sicke33Guidance fingers34Saving

Claims (9)

1. A hose clamp made of a clamping band (10) having an inner end portion overlapped by an outer end portion, closing means (16, 17, 27, 28) for maintaining both end portions in mutual engagement in the closed condition of the hose clamp, and ear-like tightening means (24) provided in the clamping band (10) and having two outward extending legs (25) interconnected by a bridge portion (26), wherein the outer side of the inner end portion has a first toothed portion (15) which in the tightened condition of the hose clamp engages a second toothed portion (23) disposed on the inner side of the outer end portion and on the side of the tightening means (24) remote from the outer clamping band end (29), characterised in that the inner end portion terminates in a tongue (12) which has a width smaller than the full band width and which, in the closed condition of the hose clamp, extends through a step (21) provided on the outer end portion, and the outer end portion has a part (19) covering the tongue (12) in an area adjoining the step (21).
2. The hose clamp of claim 1, wherein at least one of the toothed portions (15, 23) is formed in a part of the clamping band that is divided by a longitudinal slot (14).
3. The hose clamp of claim 1, wherein the first toothed portion (15) is formed on the tongue (12).
4. The hose clamp of any preceding claim, wherein the closing means (16, 17, 27, 28) has at least one depression (27) formed on the outer end portion and a projection (16) formed on the inner end portion and engaging the depression (27) in the closed condition of the hose clamp, the depression (27) having a cut-out (34) open toward the tightening means (24) for engaging a guide finger (33) formed on the projection (16).
5. The hose clamp of any preceding claim, wherein the inner side of the clamping bend (10) has a depression (31) which, in the closed condition, comes to lie on the hose, the periphery of which depression (31) is completely within the clamping band (10) and which has a width decreasing from the centre of the clamping band (10) in the longitudinal direction of the band.
6. The hose clamp of claim 5, wherein the periphery of the depression (31) is reinforced by a circumferential bead (32).
7. The hose clamp of any preceding claim, wherein the tongue (12) carries a guide nose (13) for engaging a guide slot (20) provided in the outer end portion.
8. The hose clamp of claim 7 including a marking (30) at the guide slot (20) for observing the closing condition of the hose clamp.
9. The hose clamp of any preceding claim, wherein the outer side of the clamping band (10) has a securing hook (18) for the outer clamping band end (29) to prevent any inadvertent opening of the hose clamp.