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WO1996034223A1 - Hose clamp with tension maintaining loop - Google Patents

Hose clamp with tension maintaining loop Download PDF

Info

Publication number
WO1996034223A1
WO1996034223A1 PCT/AU1996/000237 AU9600237W WO9634223A1 WO 1996034223 A1 WO1996034223 A1 WO 1996034223A1 AU 9600237 W AU9600237 W AU 9600237W WO 9634223 A1 WO9634223 A1 WO 9634223A1
Authority
WO
WIPO (PCT)
Prior art keywords
band
clamp
clip
spring
deviation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU1996/000237
Other languages
French (fr)
Inventor
Richard Wellesley Lennox
John Mills Hopper
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tridon Australia Pty Ltd
Original Assignee
Tridon Australia Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tridon Australia Pty Ltd filed Critical Tridon Australia Pty Ltd
Priority to AU53932/96A priority Critical patent/AU5393296A/en
Publication of WO1996034223A1 publication Critical patent/WO1996034223A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose-connectors, i.e. single members engaging both hoses
    • F16L33/02—Hose-clips
    • F16L33/08—Hose-clips in which a worm coacts with a part of the hose-encircling member that is toothed like a worm-wheel

Definitions

  • the following invention relates to a clamp or clip adapted to surround a substantially cylindrical object such as, for example, a hose.
  • the device might equally be adapted to secure together interconnecting tubular components such as pipe fittings.
  • the invention more particularly, though not exclusively, relates to hose clamps to secure a flexible hose of an automotive cooling system to say a water pump or radiator inlet/outlet port.
  • hose clamps/clips comprise a metallic band to surround the hose to be clamped. Such clamps/clips further comprise a housing within which there is situated a screw engageable with the band which is typically provided with corresponding threads.
  • a clamp/clip comprising: a band for surrounding an object of substantially circular cross-section, tightening means to tension the band about the object, wherein the band comprises a resilient deviation and/or attachment remote from the tightening means to allow the band to expand/contract should the object expand/contract when the clamp/clip is in position, tensioned about the object.
  • the deviation comprises a protruding loop of the band.
  • the attachment comprises a spring which applies spring force to the band at either side of the deviation.
  • the spring is "C" shaped.
  • Fig. 1 is a schematic elevational view of a hose clamp/clip
  • Fig. 2 is a schematic end elevational view of the clamp/clip of Fig. 1
  • Fig. 3 is a schematic elevational view of another clamp/clip
  • Fig. 4 is a schematic end elevational view of the clamp/clip of Fig. 3
  • Fig. 5 is a schematic cross-sectional view of the band of either of the clips of Figs. 1 to 4 and a liner.
  • a hose clamp/clip 10 comprises a band 11, typically fabricated from stainless steel or zinc plated carbon steel.
  • Screw 13 Attached to the overlapping portion of the band 11 is a screw housing 12 within which a screw 13 is situated.
  • Screw 13 can typically be formed of yellow dichromate carbon steel, zinc plated carbon steel or stainless steel, and engages with thread 16 formed in band 11.
  • Thread 16 may for example be solid pressed thread or perforated cut thread.
  • the band 11 comprises a deviation 14 in the form of a protruding loop.
  • the deviation 14 defines a pair of indentations 18 at opposed positions at either side of a gap 19 in the band 11.
  • deviation 14 might provide a sufficient degree of resilience to allow expansion/contraction of the band 11.
  • an additional spring 15 may be provided.
  • Spring 15 might also be provided for additional spring force where the band 11 is sufficiently resilient, though does not in itself provide the desired spring force.
  • Spring 15, typically fabricated from spring steel, is to be "C" shaped comprising a pair of opposed edges 20 which press against the band 11 at the opposing indentations 18. In the configuration depicted in Fig. 1, the band 11 is under tension thus providing the gap 19 as shown.
  • deviation 14 and spring 15 are in a pre-tension state.
  • Figs. 3 and 4 is substantially the same as that of Figs. 1 and 2 except that the tightening means (housing 12 and screw 13) are of different shape.
  • the deviation 14 and spring 15 as shown in a pre-tension state corresponding to the non-expanded state of the band 11.
  • either of the clamps/clips may also comprise a liner 17.
  • the liner 17 is to be situated around the inside surface 21 of the clamp/clip to protect a rubber hose for example from being pinched at gap 19, or otherwise damaged as a result of abrasion by the clamp/clip 10.
  • the liner 17 is typically a plastics extrusion (say nylon) or metallic strip which may slightly overlap upon itself within the clamp/clip 10.
  • the clamp/clip 10 is placed about a hose and the screw 13 tightened to contract the band 11 about the hose.
  • the clamp/clip 10 is also designed to absorb or follow the relaxation or shrinkage of a rubber/silicone (or other compound) hose as the material shrinks with age. In many instances hose shrinkage is a major cause of leakage associated with hoses used to circulate air, fuel and water in engine environments.
  • the device may be tightened to an extent just sufficient to create a slight gap 19. From a cold start, and when the cooling system of a motor vehicle warms up, the radiator inlet/outlet port about which the hose is clamped by the device may expand. As a result, the gap 19 may open against the resilience of deviation 14 and spring 15. After stopping the vehicle and the cooling system cooling down, the resilience of deviation 14 and spring 15 will reduce the dimension of gap 19 to its original dimension.
  • the tension of band 11 is substantially constant whether the cooling system is hot or cold.
  • more than one deviation and/or clamp may be provided along the length of the band 11.
  • two or three such individual components or combinations thereof may surround a hose on a single clamp.
  • each end of the band can be connected by means of a bolt extending substantially tangentially to the curve of the band, the ends of the band being drawing together by means of a nut upon that bolt.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)

Abstract

A hose clamp or clip (10) is typically adapted to secure a flexible hose of an automotive cooling system to say a water pump or radiator inlet/outlet port. The clamp (10) comprises a band (11) typically fabricated from stainless steel or zinc plated carbon steel. Attached to the overlapping portion of the band (11) is a screw housing (12) within which a screw (13) is situated. The band (11) comprises a deviation (14) in the form of a protruding loop. Where the band (11) is fabricated from sufficiently resilient material, deviation (14) provides a sufficient degree of resilience to allow expansion/contraction of the band (11). However, should band (11) not be formed of sufficiently resilient material, an additional spring (15) can be provided. Spring (15), typically fabricated from spring steel, is 'C' shaped and comprises a pair of opposed edges (20) which press against the band (11) at opposing identations (18). The invention is particularly advantageous in applications where the clamped fittings undergo thermal expansion/contraction.

Description

HOSE CLAMP WITH TENSION MAINTAINING LOOP
Field of the Invention
The following invention relates to a clamp or clip adapted to surround a substantially cylindrical object such as, for example, a hose. The device however might equally be adapted to secure together interconnecting tubular components such as pipe fittings.
The preferred application of the present invention is in the automotive industry. For example, the invention more particularly, though not exclusively, relates to hose clamps to secure a flexible hose of an automotive cooling system to say a water pump or radiator inlet/outlet port.
Known hose clamps/clips comprise a metallic band to surround the hose to be clamped. Such clamps/clips further comprise a housing within which there is situated a screw engageable with the band which is typically provided with corresponding threads. Once such clamps/clips are tensioned about a hose, the circumferential dimension of the clamp is fixed. Accordingly, when say the radiator inlet/outlet port expands or contracts with fluctuations in heat, the clamping force provided by such known clamps varies. Such variation may cause leakage between the hose and the port, or damage to the hose resulting from repeated abrasion upon its outer surface.
Object of the Invention It is the object of the present invention to overcome or substantially ameliorate the above disadvantages.
Disclosure of the Invention
There is disclosed herein a clamp/clip comprising: a band for surrounding an object of substantially circular cross-section, tightening means to tension the band about the object, wherein the band comprises a resilient deviation and/or attachment remote from the tightening means to allow the band to expand/contract should the object expand/contract when the clamp/clip is in position, tensioned about the object.
Preferably, the deviation comprises a protruding loop of the band. Preferably, the attachment comprises a spring which applies spring force to the band at either side of the deviation.
Brief Description of the Drawings
Preferably, the spring is "C" shaped.
Preferred forms of the present invention will now be described by way of example with reference to the accompanying drawings, wherein:
Fig. 1 is a schematic elevational view of a hose clamp/clip,
Fig. 2 is a schematic end elevational view of the clamp/clip of Fig. 1, Fig. 3 is a schematic elevational view of another clamp/clip, Fig. 4 is a schematic end elevational view of the clamp/clip of Fig. 3, and Fig. 5 is a schematic cross-sectional view of the band of either of the clips of Figs. 1 to 4 and a liner.
Description of the Preferred Embodiments
In Figs. 1 and 2 of the accompanying drawings there is depicted a hose clamp/clip 10. Clip 10 comprises a band 11, typically fabricated from stainless steel or zinc plated carbon steel.
Attached to the overlapping portion of the band 11 is a screw housing 12 within which a screw 13 is situated. Screw 13, can typically be formed of yellow dichromate carbon steel, zinc plated carbon steel or stainless steel, and engages with thread 16 formed in band 11. Thread 16 may for example be solid pressed thread or perforated cut thread.
The band 11 comprises a deviation 14 in the form of a protruding loop. The deviation 14 defines a pair of indentations 18 at opposed positions at either side of a gap 19 in the band 11. Where the band 11 is fabricated from sufficiently resilient material, deviation 14 might provide a sufficient degree of resilience to allow expansion/contraction of the band 11. However, should band 11 not be formed of sufficiently resilient material, an additional spring 15 may be provided. Spring 15 might also be provided for additional spring force where the band 11 is sufficiently resilient, though does not in itself provide the desired spring force. Spring 15, typically fabricated from spring steel, is to be "C" shaped comprising a pair of opposed edges 20 which press against the band 11 at the opposing indentations 18. In the configuration depicted in Fig. 1, the band 11 is under tension thus providing the gap 19 as shown. Thus deviation 14 and spring 15 are in a pre-tension state.
The embodiment of Figs. 3 and 4 is substantially the same as that of Figs. 1 and 2 except that the tightening means (housing 12 and screw 13) are of different shape. However, for the purpose of illustration, the deviation 14 and spring 15 as shown in a pre-tension state corresponding to the non-expanded state of the band 11. As shown in Fig. 5 either of the clamps/clips may also comprise a liner 17. Liner
17 is to be situated around the inside surface 21 of the clamp/clip to protect a rubber hose for example from being pinched at gap 19, or otherwise damaged as a result of abrasion by the clamp/clip 10. The liner 17 is typically a plastics extrusion (say nylon) or metallic strip which may slightly overlap upon itself within the clamp/clip 10. In use, the clamp/clip 10 is placed about a hose and the screw 13 tightened to contract the band 11 about the hose. The clamp/clip 10 is also designed to absorb or follow the relaxation or shrinkage of a rubber/silicone (or other compound) hose as the material shrinks with age. In many instances hose shrinkage is a major cause of leakage associated with hoses used to circulate air, fuel and water in engine environments. The device may be tightened to an extent just sufficient to create a slight gap 19. From a cold start, and when the cooling system of a motor vehicle warms up, the radiator inlet/outlet port about which the hose is clamped by the device may expand. As a result, the gap 19 may open against the resilience of deviation 14 and spring 15. After stopping the vehicle and the cooling system cooling down, the resilience of deviation 14 and spring 15 will reduce the dimension of gap 19 to its original dimension.
Generally, once the clamp/clip is in place, the tension of band 11 is substantially constant whether the cooling system is hot or cold.
It is envisaged that a clamp/clip of a particular size will be suitable for application upon hoses of widely varying diameter. Moreover, clamps of many individual sizes would not be necessary as a result of the length of band 11.
It should be appreciated that modifications and alterations obvious to those skilled in the art are not to be considered as beyond die scope of the present invention. For example, more than one deviation and/or clamp may be provided along the length of the band 11. For example, two or three such individual components or combinations thereof may surround a hose on a single clamp.
Furthermore, rather than the provision of a screw housing 12 within which a screw
13 is situated, any means of tightening the band 11 can be provided. For example, each end of the band can be connected by means of a bolt extending substantially tangentially to the curve of the band, the ends of the band being drawing together by means of a nut upon that bolt.

Claims

Claims:
1. A clamp/clip comprising: a band for surrounding an object of substantially circular cross-section, tightening means to tension the band about the object, wherein the band comprises a resilient deviation and/or attachment remote from the tightening means to allow the band to expand/contract should the object expand/contract when the clamp/clip is in position, tensioned about the object.
2. The clamp/clip of claim 1, wherein the deviation comprises a protruding loop of the band.
3. The clamp/clip of claim 1, wherein the attachment comprises a spring which applies spring force to the band at either side of the deviation.
4. The clamp/clip of claim 3, wherein the spring is "C" shaped.
PCT/AU1996/000237 1995-04-24 1996-04-24 Hose clamp with tension maintaining loop Ceased WO1996034223A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU53932/96A AU5393296A (en) 1995-04-24 1996-04-24 Hose clamp with tension maintaining loop

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN2589A AUPN258995A0 (en) 1995-04-24 1995-04-24 Hose clamp/clip
AUPN2589 1995-04-24

Publications (1)

Publication Number Publication Date
WO1996034223A1 true WO1996034223A1 (en) 1996-10-31

Family

ID=3786940

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1996/000237 Ceased WO1996034223A1 (en) 1995-04-24 1996-04-24 Hose clamp with tension maintaining loop

Country Status (2)

Country Link
AU (1) AUPN258995A0 (en)
WO (1) WO1996034223A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1746327A3 (en) * 2005-07-22 2007-02-07 Rasmussen GmbH Clamp with an accessory element
US7389568B2 (en) * 2005-07-27 2008-06-24 Epicor Industries, Inc. Compression hose clamp
WO2009059599A3 (en) * 2007-11-10 2009-09-03 Scheibe, Marianne Mounting element, mounting arrangement and tool for machining a mounting element

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2101195A (en) * 1981-07-07 1983-01-12 Placencia Textil Sa Clamp for flexible tubes
AU2987889A (en) * 1988-03-31 1989-10-05 Wittek Industries, Inc. Self-aligning spring clamp
US4987652A (en) * 1990-02-09 1991-01-29 Spaulding George E Spring clamp
AU6681490A (en) * 1989-12-06 1991-06-13 Hans Oetiker Ag Maschinen- Und Apparatefabrik Balanced clamp structure
US5111555A (en) * 1984-06-20 1992-05-12 Hans Oetiker High strength clamp structure
AU1861592A (en) * 1991-07-15 1993-01-21 Hans Oetiker Ag Maschinen- Und Apparatefabrik Adjustable screw-type clamp
US5230246A (en) * 1984-06-20 1993-07-27 Hans Oetiker Ag Maschinen- Und Apparatefabrik Balancing arrangement for rotating member
US5230126A (en) * 1991-03-15 1993-07-27 Hans Oetiker Ag Maschinen- Und Apparate-Fabrik Stepless clamp
AU3805193A (en) * 1992-03-16 1993-10-21 Scientific-Atlanta, Inc. Digital audio data muting system and method
US5261145A (en) * 1991-02-19 1993-11-16 Triad Metal Products Company Self-actuating louvered clamp
AU8033394A (en) * 1993-12-09 1995-06-15 Hans Oetiker Ag Maschinen- Und Apparatefabrik Earless, stepless clamp structure
AU8033794A (en) * 1993-12-09 1995-06-15 Hans Oetiker Ag Maschinen- Und Apparatefabrik Clamp structure with sawtooth-like locking arrangement
AU2831495A (en) * 1994-08-19 1996-02-29 Hans Oetiker Ag Maschinen- Und Apparatefabrik Tolerance-compensating hose clamp

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2101195A (en) * 1981-07-07 1983-01-12 Placencia Textil Sa Clamp for flexible tubes
US5111555A (en) * 1984-06-20 1992-05-12 Hans Oetiker High strength clamp structure
US5230246A (en) * 1984-06-20 1993-07-27 Hans Oetiker Ag Maschinen- Und Apparatefabrik Balancing arrangement for rotating member
AU2987889A (en) * 1988-03-31 1989-10-05 Wittek Industries, Inc. Self-aligning spring clamp
AU6681490A (en) * 1989-12-06 1991-06-13 Hans Oetiker Ag Maschinen- Und Apparatefabrik Balanced clamp structure
US4987652A (en) * 1990-02-09 1991-01-29 Spaulding George E Spring clamp
US5261145A (en) * 1991-02-19 1993-11-16 Triad Metal Products Company Self-actuating louvered clamp
US5230126A (en) * 1991-03-15 1993-07-27 Hans Oetiker Ag Maschinen- Und Apparate-Fabrik Stepless clamp
AU1861592A (en) * 1991-07-15 1993-01-21 Hans Oetiker Ag Maschinen- Und Apparatefabrik Adjustable screw-type clamp
AU3805193A (en) * 1992-03-16 1993-10-21 Scientific-Atlanta, Inc. Digital audio data muting system and method
AU8033394A (en) * 1993-12-09 1995-06-15 Hans Oetiker Ag Maschinen- Und Apparatefabrik Earless, stepless clamp structure
AU8033794A (en) * 1993-12-09 1995-06-15 Hans Oetiker Ag Maschinen- Und Apparatefabrik Clamp structure with sawtooth-like locking arrangement
AU2831495A (en) * 1994-08-19 1996-02-29 Hans Oetiker Ag Maschinen- Und Apparatefabrik Tolerance-compensating hose clamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1746327A3 (en) * 2005-07-22 2007-02-07 Rasmussen GmbH Clamp with an accessory element
US7389568B2 (en) * 2005-07-27 2008-06-24 Epicor Industries, Inc. Compression hose clamp
WO2009059599A3 (en) * 2007-11-10 2009-09-03 Scheibe, Marianne Mounting element, mounting arrangement and tool for machining a mounting element

Also Published As

Publication number Publication date
AUPN258995A0 (en) 1995-05-18

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