WO1984003133A1 - Seal, especially for a coupling between an air intake on a tilting truck cab and a pipe securely mounted on the chassis - Google Patents

Seal, especially for a coupling between an air intake on a tilting truck cab and a pipe securely mounted on the chassis Download PDF

Info

Publication number
WO1984003133A1
WO1984003133A1 PCT/SE1984/000041 SE8400041W WO8403133A1 WO 1984003133 A1 WO1984003133 A1 WO 1984003133A1 SE 8400041 W SE8400041 W SE 8400041W WO 8403133 A1 WO8403133 A1 WO 8403133A1
Authority
WO
WIPO (PCT)
Prior art keywords
hose
lip
tubular element
bead
bellows
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/SE1984/000041
Other languages
French (fr)
Inventor
Tommy Sundquist
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.)
Volvo AB
Original Assignee
Volvo AB
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 Volvo AB filed Critical Volvo AB
Priority to DE8484900769T priority Critical patent/DE3464792D1/en
Publication of WO1984003133A1 publication Critical patent/WO1984003133A1/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
    • F16L27/00—Adjustable joints; Joints allowing movement
    • F16L27/10—Adjustable joints; Joints allowing movement comprising a flexible connection only
    • F16L27/107—Adjustable joints; Joints allowing movement comprising a flexible connection only the ends of the pipe being interconnected by a flexible sleeve
    • F16L27/11—Adjustable joints; Joints allowing movement comprising a flexible connection only the ends of the pipe being interconnected by a flexible sleeve the sleeve having the form of a bellows with multiple corrugations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/921—Snap-fit

Definitions

  • the present invention relates to a 'device for establish ⁇ ing a tight communication between an air intake mounted on a spring-balanced tilting truck cab and a connecting pipe securely mounted on the truck chassis, comprising a hose of elastic material, which at least over a portion -of its length has a wall folded in the form of a bellow, the hose having one end designed to be secured to a first tubular element and the other end designed, to be detach- ably coupled to a second tubular element.
  • a seal of this type can be designed for example to pre ⁇ vent dust, water, snow and the like from penetrating into the intake conduit from the engine air filter. It must permit a resilient movement of the cab relative to the chassis without any risk to the sealing function. Furthermore, it must be easily detachable and connectable when tilting the cab upward down. Ideally, it should be detachable without any particular manipulation when the cab is tilted and returned to its original sealing posi ⁇ tion automatically when the cab is tilted back to its operational position.
  • Sealing devices known up to now for the stated purpose fulfill the requirements to varying degrees.
  • One device consists of a simple rubber bellows which merely abuts against a flange on the connecting pipe when the cab is tilted from the forward position back to the operational position.
  • This seal does not require any particular manipulation to be detached and reconnected, but on the other hand the risk of leakage is great, especially if there is a great bouncing movement of the cab relative to the chassis. It is also known to fix an equally simple rubber bellows to the connecting pipe on the chassis with the aid of a hose clamp. This does provide an effective seal in all positions, but it does require extra manipulation for detaching and reconnecting.
  • a spring is used which presses the rubber bellows against the connecting pipe. It is true that this seal does not require any extra manipulation when the cab is tilted, but it is relatively expensive and complicated.
  • a fourth known device uses permanent magnets embedded in the bellows, which hold the bellows tightly to the con- necting pipe. This solution is relatively expensive and requires that the connecting pipe be made of magnetic material.
  • the purpose of the present invention is to achieve a sealing device of the type described by way of introduc ⁇ tion which is uncomplicated and inexpensive and provides a completely satisfactory seal even if there is signi ⁇ ficant movement of the cab as well as being automatically uncoupled and recoupled when the cab is tilted forward and back.
  • a device which is characterized in that said second end of the hose is provided on its inside with at least one annular lip inclined towards the first mentioned end of the hose and that the second tubular element is provided on its outside with at least one annular bead, which, when the hose is mounted, is disposed axially inside the lip, the hose and the second tubular element having interacting parts, abutting against each other and causing a com ⁇ pression of the folded portion when the tubular elements are moved towards each other.
  • the invention will -be described in more detail below with reference to examples shown in the accompanying drawing.
  • the Figure shows a side view in partial section of a sealing device.
  • the hose 1 shown in the Figure consists of a flexible material, e.g. rubber, and has a folded bellows portion 2, a connecting portion 3 and a connecting portion 4.
  • the portion 3 has smooth interior and exterior lateral surfaces and is designed to be securely attached with the aid of a hose clamp to a connecting pipe (not shown) , e.g. to an intake air filter mounted on a tiltable truck cab.
  • the portion 4 is coupled to a connecting pipe 5 securely mounted on the chassis.
  • the portion 4 is provided with an interior annular lip 6, which is inclined axially inwards, i.e. in the direction of the end portion 3.
  • the pipe 5 is provided at its end edge with a bead 7 of semicircular cross section, which when the
  • the connecting portion 4 has a substantially greater wall thickness than the rest of the hose.
  • a metal stiffener ring 8 is embedded in the wall, in order to ensure that the portion 4 will keep its shape adapted to the pipe end.
  • the thickness of the material and the ring will provide weight to•the portion 4 to keep the bellows extended when hanging free (cab tilted forward) .
  • This in addition to the height of the pipe 5 will ensure that when the cab is tilted back in place and the bellows is compressed against the bead, there will be sufficient force to snap the locking lip over the bead, i.e. so that the force to press the lip downwards over the bead will not be greater than the force required for a certain predetermined compression of the bellows portion 2 of the hose.
  • the bouncing movement of the cab is compensated for primarily by compression and expansion of the bellows portion 2.
  • a radial flange 9 which in the lower end position forms an abut ⁇ ment against the bead 7.
  • the hose portion 4 is provided at its lower end with an extra sealing lip 10 which is in contact with a radial
  • the length of the lip 10 is selected so that the edge of the lip rests against the flange 11 even when the lip 6 abuts against the lower edge of the bead 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Joints Allowing Movement (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Sealing Devices (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Body Structure For Vehicles (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

A rubber bellows (1) for sealing between an air intake on a spring-balanced, tilting truck cab and a connecting pipe (5) securely mounted on the chassis. The connecting pipe is provided at one end with a bead (7) and the bellows and the corresponding end with an interior lip (6), which when the bellows is connected to the pipe is forced over the bead and in its coupled position is inclined towards the bead, so that the force necessary to pull off the bellows is substantially greater than the force necessary for connecting the bellows.

Description

Seal/ especially for a coupling between an air intake on a tilting truck cab and a pipe securely mounted on the chassis
The present invention relates to a 'device for establish¬ ing a tight communication between an air intake mounted on a spring-balanced tilting truck cab and a connecting pipe securely mounted on the truck chassis, comprising a hose of elastic material, which at least over a portion -of its length has a wall folded in the form of a bellow, the hose having one end designed to be secured to a first tubular element and the other end designed, to be detach- ably coupled to a second tubular element.
A seal of this type can be designed for example to pre¬ vent dust, water, snow and the like from penetrating into the intake conduit from the engine air filter. It must permit a resilient movement of the cab relative to the chassis without any risk to the sealing function. Furthermore, it must be easily detachable and connectable when tilting the cab upward down. Ideally, it should be detachable without any particular manipulation when the cab is tilted and returned to its original sealing posi¬ tion automatically when the cab is tilted back to its operational position.
Sealing devices known up to now for the stated purpose fulfill the requirements to varying degrees. One device consists of a simple rubber bellows which merely abuts against a flange on the connecting pipe when the cab is tilted from the forward position back to the operational position.
This seal does not require any particular manipulation to be detached and reconnected, but on the other hand the risk of leakage is great, especially if there is a great bouncing movement of the cab relative to the chassis. It is also known to fix an equally simple rubber bellows to the connecting pipe on the chassis with the aid of a hose clamp. This does provide an effective seal in all positions, but it does require extra manipulation for detaching and reconnecting.
In a third device, a spring is used which presses the rubber bellows against the connecting pipe. It is true that this seal does not require any extra manipulation when the cab is tilted, but it is relatively expensive and complicated.
A fourth known device uses permanent magnets embedded in the bellows, which hold the bellows tightly to the con- necting pipe. This solution is relatively expensive and requires that the connecting pipe be made of magnetic material.
The purpose of the present invention is to achieve a sealing device of the type described by way of introduc¬ tion which is uncomplicated and inexpensive and provides a completely satisfactory seal even if there is signi¬ ficant movement of the cab as well as being automatically uncoupled and recoupled when the cab is tilted forward and back.
This is achieved according to the invention by a device which is characterized in that said second end of the hose is provided on its inside with at least one annular lip inclined towards the first mentioned end of the hose and that the second tubular element is provided on its outside with at least one annular bead, which, when the hose is mounted, is disposed axially inside the lip, the hose and the second tubular element having interacting parts, abutting against each other and causing a com¬ pression of the folded portion when the tubular elements are moved towards each other. i By virtue of this design with an inclined lip, the lower portion of the hose can be pressed with very little force over the bead on the chassis connecting pipe. Due to the direction of incline of the lip and the friction between the lip and the connecting pipe, however, a much greater force is required to pull the lip over the bead in the opposite direction, which means that the hose will be held securely in place and provide a fully satisfactory seal even during large cab movement. When the cab is tilted, however, this force is not so great as to present any problem in pulling the hose off the connecting pipe. An advantage of the design according to the invention over the known design with embedded magnets is that a secure coupling is achieved regardless of the material in the connecting pipe. It need not consist of a ferro¬ magnetic material, but can be made of plastic for example.
The invention will -be described in more detail below with reference to examples shown in the accompanying drawing. The Figure shows a side view in partial section of a sealing device.
The hose 1 shown in the Figure consists of a flexible material, e.g. rubber, and has a folded bellows portion 2, a connecting portion 3 and a connecting portion 4. The portion 3 has smooth interior and exterior lateral surfaces and is designed to be securely attached with the aid of a hose clamp to a connecting pipe (not shown) , e.g. to an intake air filter mounted on a tiltable truck cab. The portion 4 is coupled to a connecting pipe 5 securely mounted on the chassis.
According to the invention, the portion 4 is provided with an interior annular lip 6, which is inclined axially inwards, i.e. in the direction of the end portion 3.
Furthermore, the pipe 5 is provided at its end edge with a bead 7 of semicircular cross section, which when the
QMPI sty , WIPO hose has been mounted, is disposed axially inside the lip 6, as can be seen in the Figure. With this construc¬ tion, the lip will provide relatively little resistance when the portion 4 is slipped on to the pipe 5. On the other hand, the lip will provide significantly greater resistance when the hose is pulled off the pipe 5, since the pressure of the lip against the pipe will increase when the lip strikes the bead. Only after the lip has been deformed enough to fold outwards can the hose be pulled off the pipe. The lip and the bead thus function as a sort of snaplock.
As can be seen in the Figure, the connecting portion 4 has a substantially greater wall thickness than the rest of the hose. A metal stiffener ring 8 is embedded in the wall, in order to ensure that the portion 4 will keep its shape adapted to the pipe end. The thickness of the material and the ring will provide weight to•the portion 4 to keep the bellows extended when hanging free (cab tilted forward) . This in addition to the height of the pipe 5 will ensure that when the cab is tilted back in place and the bellows is compressed against the bead, there will be sufficient force to snap the locking lip over the bead, i.e. so that the force to press the lip downwards over the bead will not be greater than the force required for a certain predetermined compression of the bellows portion 2 of the hose.
The bouncing movement of the cab is compensated for primarily by compression and expansion of the bellows portion 2. Axially inside the lip, there is a radial flange 9 which in the lower end position forms an abut¬ ment against the bead 7. To prevent the deposit of conta- rainents on the outside of the pipe 5, which could cause heavy wear on the lip 6 as it moves relative to the pipe, the hose portion 4 is provided at its lower end with an extra sealing lip 10 which is in contact with a radial
QMPI flange 11 on the pipe 5. The length of the lip 10 is selected so that the edge of the lip rests against the flange 11 even when the lip 6 abuts against the lower edge of the bead 7.

Claims

1. Device for establishing a tight communication between an air intake mounted on a spring-suspended tilting truck cab and a connecting pipe securely mounted on the truck chassis, comprising a hose of elastic material, which at least over a portion of its length has a wall folded in the form of a bellows, the hose having one end designed to be secured to a first tubular element and a second end designed to be detachably coupled to a second tubular element, characterized in that said second end (4) of the hose is provided on its inside with at least one annular lip (6) inclined towards the first mentioned end of the hose, and that the-second tubular element (5) is provided on its outside with at least one annular bead (7), which, when the hose is mounted, is disposed axially inside the lip, the hose and the second tubular element having interacting parts (9,7), abutting against each other and causing a compression of the folded portion (2) when the tubular elements are moved towards each other.
2. Device according to Claim 1 , characterized in that the hose is provided with an additional sealing lip (10) which is disposed axially outside the first-mentioned * sealing lip (6) and extends obliquely outwards from the hose end (4) , and that the second tubular element (5) is provided on its outside, axially spaced from the bead (7), with an annular, radially directed flange (11), against which said additional sealing lip abuts, when the hose has been mounted.
3. Device according to Claim 2, characterized in that the sealing lips (6,10) are provided with a portion (4) of greater wall thickness than the folded hose wall (2) and that at least one stiffener ring (8) is embedded in this portion.
4. Device according to Claim 2 or 3, characterized in that the hose is provided on its inside with a radially directed abutment flange (9) , which is disposed axially inside of the first mentioned lip (6) , and in that the axial length of the additional lip' (10) is at least equal to the distance between the flange (9) and the first mentioned lip.
PCT/SE1984/000041 1983-02-09 1984-02-08 Seal, especially for a coupling between an air intake on a tilting truck cab and a pipe securely mounted on the chassis Ceased WO1984003133A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8484900769T DE3464792D1 (en) 1983-02-09 1984-02-08 Seal, especially for a coupling between an air intake on a tilting truck cab and a pipe securely mounted on the chassis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8300679A SE435313B (en) 1983-02-09 1983-02-09 SEALING DEVICE BETWEEN AN AIR INPUT ON A TIPPABLE VEHICLE CABIN AND A CHASSIS FAST MOUNTED PIPE

Publications (1)

Publication Number Publication Date
WO1984003133A1 true WO1984003133A1 (en) 1984-08-16

Family

ID=20349958

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1984/000041 Ceased WO1984003133A1 (en) 1983-02-09 1984-02-08 Seal, especially for a coupling between an air intake on a tilting truck cab and a pipe securely mounted on the chassis

Country Status (6)

Country Link
US (1) US4575128A (en)
EP (1) EP0135531B1 (en)
JP (1) JPS60500880A (en)
DE (1) DE3464792D1 (en)
SE (1) SE435313B (en)
WO (1) WO1984003133A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0395303A3 (en) * 1989-04-26 1992-01-08 Thermopol Limited Flexible hoses
WO2014098712A1 (en) * 2012-12-20 2014-06-26 Scania Cv Ab Air intake system and motor vehicle comprising such an air intake system

Families Citing this family (20)

* Cited by examiner, † Cited by third party
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DE8805399U1 (en) * 1988-04-23 1989-08-24 Klöber, Johannes, 58256 Ennepetal Vent hose
US5794733A (en) * 1996-08-16 1998-08-18 Volvo Gm Heavy Truck Corporation Vehicle air intake and method
US6367802B1 (en) 1999-11-30 2002-04-09 Malcolm Mann Inc. Annular gasket with locking structure
SE516790C2 (en) * 2000-05-02 2002-03-05 Volvo Lastvagnar Ab Motor vehicles with a divisible coupling between a first duct part and a second duct part and a method for sealing and locking such a coupling
US7469905B2 (en) 2000-11-30 2008-12-30 Springseal Inc. Permanently lubricated film gasket and method of manufacture
US20040041347A1 (en) * 2000-11-30 2004-03-04 Beach Jefferey Kurtis Permanently lubricated gasket
US6550775B2 (en) 2000-11-30 2003-04-22 Malcolm Mann, Inc. Annular gasket
PT1341244E (en) * 2001-12-17 2006-08-31 Akkumulatorenfabrik Moll Gmbh ACCUMULATOR WITH A COVER OF TWO PARTS
SE527283C2 (en) * 2004-06-14 2006-01-31 Scania Cv Ab Motor vehicle with ventilation device
EP1819496A4 (en) 2004-12-08 2009-10-28 Advanced Elastomer Systems Molded gasket and method of making
KR100715897B1 (en) * 2005-04-27 2007-05-08 현대자동차주식회사 Supporting apparatus for a bellows hose of the snorkel duct
CN103157165B (en) 2005-08-15 2016-12-28 瑞思迈有限公司 humidifier and/or flow generator for CPAP device
US8544465B2 (en) 2005-08-15 2013-10-01 Redmed Limited Compliant coupling or adaptor
US8365726B2 (en) 2007-06-07 2013-02-05 Resmed Limited Tub for humidifier
US8474830B2 (en) 2007-06-07 2013-07-02 Springseal, Inc. Gasket
US7506667B1 (en) 2008-02-27 2009-03-24 Paccar Inc Flex stack
US8727387B2 (en) * 2008-05-27 2014-05-20 Springseal, Inc. Pipe coupling assembly
US8801049B2 (en) 2011-04-29 2014-08-12 Springseal, Inc. Pipe coupling system and method
USD717405S1 (en) * 2012-08-03 2014-11-11 Coflex S.A. De C.V. Sleeve with inner downwardly extending inner member
DE112014001036T5 (en) 2013-02-28 2015-12-17 Cummins Filtration Ip, Inc. Air intake systems for internal combustion engines

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US1984347A (en) * 1933-11-03 1934-12-11 Sev Inc Faucet connection
US2507536A (en) * 1947-03-14 1950-05-16 Seamless Rubber Co Bath spray or like connector
FR1465613A (en) * 1965-11-29 1967-01-13 Citroen Sa Andre Improvements to articulated joints
SE352720B (en) * 1969-02-19 1973-01-08 Sarlin Ab Oy E
US3809412A (en) * 1971-01-21 1974-05-07 Hepworth Iron Co Ltd Pipe couplings
GB1559645A (en) * 1977-09-02 1980-01-23 Lamaguchi S Flexible joint assembly
GB2037239A (en) * 1978-12-02 1980-07-09 Daimler Benz Ag A separable junction for an air intake system of a commercial vehicle

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US1925984A (en) * 1932-08-23 1933-09-05 Novakovich Michael Drain and waste pipe cleaner
US2047713A (en) * 1934-01-29 1936-07-14 Lowe E Simpson Conduit connecter for agitating devices
FR1065150A (en) * 1952-10-29 1954-05-20 Improvement in rubber fittings for gas hoses or other flexible hoses
FR1295520A (en) * 1961-04-27 1962-06-08 Improvements to expansion joints
US3388705A (en) * 1965-04-08 1968-06-18 Foregger Company Inc Universal endotracheal tube coupling or adaptor
FR2002864A1 (en) * 1968-02-29 1969-10-31 Daimler Benz Ag
US3873137A (en) * 1973-09-19 1975-03-25 Seiichi Yamaguchi Bellows-type joint assembly
GB1499089A (en) * 1975-07-03 1978-01-25 Automation Ind Inc Flexible hose
US4186949A (en) * 1978-04-21 1980-02-05 Taurus Gumiipari Vallalat Elastic pipe-connecting component for pipes or pipelines, or the like

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1984347A (en) * 1933-11-03 1934-12-11 Sev Inc Faucet connection
US2507536A (en) * 1947-03-14 1950-05-16 Seamless Rubber Co Bath spray or like connector
FR1465613A (en) * 1965-11-29 1967-01-13 Citroen Sa Andre Improvements to articulated joints
SE352720B (en) * 1969-02-19 1973-01-08 Sarlin Ab Oy E
US3809412A (en) * 1971-01-21 1974-05-07 Hepworth Iron Co Ltd Pipe couplings
GB1559645A (en) * 1977-09-02 1980-01-23 Lamaguchi S Flexible joint assembly
GB2037239A (en) * 1978-12-02 1980-07-09 Daimler Benz Ag A separable junction for an air intake system of a commercial vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0395303A3 (en) * 1989-04-26 1992-01-08 Thermopol Limited Flexible hoses
WO2014098712A1 (en) * 2012-12-20 2014-06-26 Scania Cv Ab Air intake system and motor vehicle comprising such an air intake system

Also Published As

Publication number Publication date
US4575128A (en) 1986-03-11
JPS60500880A (en) 1985-06-06
SE8300679D0 (en) 1983-02-09
DE3464792D1 (en) 1987-08-20
EP0135531B1 (en) 1987-07-15
JPH0465279B2 (en) 1992-10-19
SE435313B (en) 1984-09-17
SE8300679L (en) 1984-08-10
EP0135531A1 (en) 1985-04-03

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