US3661422A - Self-adjustment for body support cushion - Google Patents

Self-adjustment for body support cushion Download PDF

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Publication number
US3661422A
US3661422A US3661422DA US3661422A US 3661422 A US3661422 A US 3661422A US 3661422D A US3661422D A US 3661422DA US 3661422 A US3661422 A US 3661422A
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US
United States
Prior art keywords
orifice
bleed
air
envelope
cushion
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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.)
Expired - Lifetime
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English (en)
Inventor
Joseph Sember
Eugene R Mcgregor
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.)
PTC Aerospace Inc
Universal Oil Products Co
Original Assignee
Universal Oil Products Co
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 Universal Oil Products Co filed Critical Universal Oil Products Co
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Publication of US3661422A publication Critical patent/US3661422A/en
Assigned to PTC AEROSPACE INC., BANTAM, CT. 06750 A CORP. reassignment PTC AEROSPACE INC., BANTAM, CT. 06750 A CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UOP INC., A DE CORP
Assigned to PTC AEROSPACE INC., A DE CORP reassignment PTC AEROSPACE INC., A DE CORP ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: UOP INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/407—Supports for the head or the back for the back of collapsible type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/46—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/467—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by fluid means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/70—Upholstery springs ; Upholstery
    • B60N2/7005—Upholstery springs ; Upholstery detachable
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87829—Biased valve
    • Y10T137/87837—Spring bias
    • Y10T137/87861—Spring coaxial with valve

Definitions

  • N -Z 56,574 In combination with a body support cushion unit where opencell foam is used in an air-tight envelope and a manually con- [52] U s u 297/284 137/612 1 trollable valving means in a passageway to the envelope is util- [51] 7/I4A47C 4 ized so as to regulate flow of ambient air pressure into and out [58] Fie'ld 614o2 614 19 of the foam, there is additionally provided a special valving 5 5 device as a part of the valving means for the unit which includes a separate movable blocking member seatable over a separate small bleed-in orifice.
  • the present invention relates to a self-adjusting cushion unit with enclosed open-cell foam that is adapted for use in supporting the back of a seat occupant.
  • the invention is directed to an improved form of unit in that a special valving means permits a slow bleed-in of air when the seat is not in use such that the portion of the seat having the adjustable support cushion will in turn be self-filled or dressed.
  • the cushion thickness is greater than desired by the seat occupant, he can push his back against the cushion zone while at the same time opening the valve to let air out of the encased open-cell foam.
  • the cushion has the right thickness or feel, he can let the valve close and maintain a vacuum in the cushion envelope.
  • the occupant wishes to let the lumbar cushion have a greater thickness or a more full support, he can temporarily lean forward and take his back weight or pressure from the cushion while opening the valve so as to let the vacuum of the open-cell foam pull in ambient air.
  • the present invention provides in connection with a weight responsive support cushion unit that is adapted for supporting a particular portion of the human body, where open-cell foam cushion material is maintained in an air-tight envelope, an ambient air passageway means is provided to said envelope and a manually controllable valving means is connective with the passageway to regulate flow of ambient air pressure into and out of said envelope, the improvement in the valving means for the unit which comprises in combination, a body member with an air-inlet-outlet means to the interior thereof, a manually movable plug member, movement means connective to the latter to permit air flow into and out from said body through said inlet-outlet means, a separate small area bleed-in orifice to the interior of said valve body, and a separate displaceable orifice covering means for the interior face of said bleed-in orifice, whereby a vacuum condition in said envelope provides for an inward ambient air flow through the bleed-air orifice and said passageway and, conversely, a weight pressure on said envelope provides a back
  • the valving means will have a principal movable plug member that can be operated by a thumb or finger, as for example by a push button type of operation, such that the plug member or a valve member will be unseated and permit air flow into or out of the support cushion.
  • a finger operated valve may be along the front portion of an armrest or other convenient portion of the seat whereby the seat occupant may readily open the valve and permit the desired amount of air flow into or out of the foam material so as to obtain a desired thickness for the cushion.
  • the valving means could be placed anywhere within the air passageway going to the envelope and into communication with the open-cell foam material encased therein.
  • cable means, or other mechanical linkage means can be incorporated in the unit to provide the operation of a remotely placed valving means to, in turn, effect the desired manual adjustment of the cushion thickness.
  • the valving means will utilize a separate movable plug, movable diaphragm, flapper means, or the like, as a means for seating and sealing bleed-in air flow through a separate small orifice.
  • the small orifice may comprise a plurality of small holes rather than one small opening, as long as the movable or deformable covering means is capable of seating over the one or more holes and as long as there is a back pressure on the cushion unit and through the passageway means to the interior face of the cover means.
  • the separate orifice covering means may comprise a spring biased movable plug member or ball member capable of seating over an orifice opening.
  • the movable or defiectable bleed-in air cover member may comprise a flexible diaphragm or washer like member capable of being readily deflected so as to press down over one or more small orifice openings and effect a seal of the bleed-in air.
  • the flexible characteristics of the deformable diaphragm member or the spring biasing of the rigid plug member or ball member should be such that a low vacuum condition within the envelope, or the open-cell foam therein, will provide an unseating of such cover member and the gradual bleed-in of ambient air through the orifice means, the valve body and the passageway means to thereby gradually dissipate the vacuum condition in the envelope and provide the desired increase in thickness for the cushion.
  • the movable cover member or diaphragm means will be capable of readily moving to seat itself over the orifice opening as long as there is any external weight or pressure exerted on the cushion to in turn cause pressure to be exerted through the tubing or other passageway means to the valving means and to the inside face portion of the movable orifice covering means.
  • the size of the one or more holes for the bleed-in of air to the cushion unit inasmuch as the rate of filling the cushion envelope can be varied to suit any predetermined time period.
  • the size of the orifice can also depend on the size of the cushion unit. However, generally the orifice diameter will be less than about one-sixteenth inch for a normal lumbar cushion unit such that the latter will be permitted to gradually fill from a low compressed condition to a full thickness in a 10 to 15 minute period.
  • the slow replacement of air into the cushion unit will be such as to permit the removal of wrinkles and the redressing of the seat unit when an occupant leaves the seat while, on the other hand, the bleed in will be slow enough to preclude having a rapid change in the cushion size in the event that the seat occupant momentarily lifts his back from the rear portion of the seat unit.
  • the present improved self-adjusting body support cushion will generally use an open-cell polyurethane foam or latex foam rubber as the inner resilient material, whereby there is flexibility and comfort for the user as well as the provision of internal interconnected open cells permitting air flow which reaches the exterior of the foam to fill the cushion unit as a whole or, alternatively, to pennit the release of air when pres sure is exerted upon the cushion envelope at the same time the valve is open.
  • the release of pressure on a compressed opencell foam material also provides in situ, or automatically, a vacuum condition whereby ambient air may be subsequently permitted to flow through the control valve means into the cushion envelope.
  • the air-type envelope for the cushion may be of polyvinyl material or other non-porous plastic material capable of holding low superatmospheric pressures.
  • the envelope or covering it is not intended to limit the envelope or covering to any one specific material inasmuch as the outer covering could be sprayedon air tight coating.
  • the envelope could comprise a relatively thin layer of a closed cell material of the type precluding air travel between cells.
  • the self-adjusting body support cushion may be provided with a built-in, controlled release means to as to preclude an over expansion of the cushion or the cushion envelope due to any unusual pressure situations.
  • the pressure release means may be provided by having a rupture zone in the cushion envelope itself or it may comprise a rupture disk or other air escape means within the valving portion of the unit. In any event, it is not intended to limit the present improvement to the use of any one type of pressure release system to accommodate an unusual pressure change.
  • FIG. 1 of the drawing is a diagrammatic elevational view of a vehicle seat indicating a manual control valve operation for an adjustable support cushion along the lower portion of the seat back in the lumbar region of an occupant.
  • FIG. 2 of the drawing is a sectional elevational view through one embodiment of a valving means having a separate movable valve member to effect opening and closing with respect to a bleed-in air orifice.
  • FIG. 3 of the drawing is a partial sectional elevational view through the valving means indicating how the separate movable plug member may be dislodged to permit a slow bleed-in of air through the valve body to conduit means connecting therewith.
  • FIG. 4 illustrates, in a sectional view, a modified valving means where a flexible washer-like diaphragm is utilized to provide a seal or cover means for a plurality of bleed-in orifices.
  • FIGS. 5 and 6 of the drawing show, in partial elevational views, variations in positioning of the principal valve member as well as a change in position for the flexible orifice covering means.
  • FIG. 1 of the drawing there is shown a passenger-type seat 1 with a back portion 2 being provided with a lower adjustable body support cushion 3 at a position to be a lumbar support for the back of the seat occupant.
  • An adjustable lumbar support cushion will normally be placed under the outer upholstery fabric of seat 1 and have its own air-tight envelope 4 capable of encasing a resilient open-cell foam material 5.
  • a flexible conduit or tube 6 connective between the interior of the cushion envelope 4 and the interior of the valving means 7.
  • the valving means 7 will normally be placed at the front of the armrest for the seat unit 1 or at some other readily excessible zone.
  • the valving means will be of a thumb or finger operated push-button construction such that air may pass through the valve body into or out from the tube 6 as well as into or out from the interior of the support cushion 3.
  • a seat occupant desires the lumbar cushion to have less thickness, he can press against the cushion while at the same time effecting an opening of valve 7 whereby air can be expelled from within the open-cell foam 5 to obtain a desired thickness and feel for the occupants back.
  • the occupant desires the cushion 3 to be thicker or to have a fully expanded size, then the occupant can momentarily raise his back from the surface of the cushion section 3 while operating the valve member 7 to permit the vacuum condition in the open-cell foam material 5 to take in ambient air through the valve and the tubing 6.
  • the valving means 7 for use in combination with the body adjustable cushioning unit will have bleed-in orifice means such that when body pressure is not being exerted against the exterior of adjustable cushion 3, there will be a gradual bleed-in of air through a small metered orifice so as to cause the cushion to eventually reach its full thickness and take out any wrinkles that may exist in the lower portion of the seat back 2.
  • there is an automatic built-in construction for the present improved design of the unit such that there will be a self-dressing and removal of any wrinkles or unsightly appearances to the front of the seat back. This is of particular advantage appearance wise with respect to an airplane, bus, or other vehicle which would have a multiplicity of passenger seats.
  • valve body 8 adapted to be readily mounted on a seat chassis or other support means to provide for air flow through a port means 9 to a tube connector port 10 or, vice versa, there may be air flow through port means 10 to the interior body portion of 8 and thence to port means 9 such that there is the expulsion of air from acushion section and cushion envelope being connected to the valve body 8 by means of tube means 6.
  • the flow of air into or out from valve body 8 is permitted through the movement of pushbutton 11 in turn moving the internal cylindrical member 12 having a peripheral channel 13. In other words, when pushbutton portion 11 is pushed inwardly from the position shown in FIG.
  • the present valve embodiment provides a separate movable plug or seating member 15 which has a shaft portion 16 adapted to move in and out of a recess 17 within valving member 12.
  • a separate valving member or cover member capable of permitting the passage of air through a bleed-in orifice 18 in the end of the valve body 8.
  • a spring means 19 to assist in the biasing of the orifice covering member 15 against the inside face of the bleed-in orifice 18.
  • spring means 19 should be easily compressed such that a low vacuum condition carrying through the tubular means 6 will permit the valving member 15 to be unseated and in turn permit air flow through orifice 18 into the interior portion of valve body 8 by way of the central opening 17 and a passageway 20 which is in alignment with port means 10 and the conduit 6.
  • FIG. 3 of the drawing there is indicated a slightly lifted positioning for the valve member 15 with respect to the interior end portion of the valve body 8 at a seat portion designated as 21 and the uncovering of the inner face of orifice 13.
  • the position of FIG. 3 will obtain at such times as a seat occupant leaves the vehicle seat and there is no longer body weight or any back pressure to in turn exert air pressure through the cushioning unit into tube means 6 and into the interior of the valve body 8 so as to have pressure against the inner face 22 of the valve member 15.
  • any vacuum condition that may exist in a partially compressed foam in the cushioning unit will cause ambient air on the exterior side of orifice 18 to push plug member away from the seat 21 and then permit air flow through the interior of the valve body 8 by way of passageways l7 and into connector tube 6.
  • orifice 18 be of a small size, i.e. of small cross-sectional area, such that there is no rapid intake of air into the cushioning unit at such times as the seat occupant may temporarily move about or lift his back away from the back of the seat itself; but, upon the occasion of the occupant leaving the seat permanently or for an extended period of time, there will be a redressing of the seat by having the cushion unit, as shown in FIG. 1, fill itself to a fully extended position.
  • valve body 23 has an orifice 24 for connecting a conduit or flexible tube means that can in turn connect with the envelope of the cushioning unit and, in addition, it will have an open end portion 25, as best shown in FIG. 6, where ambient air can flow through the open interior passageway 26 to the tube connecting port 24.
  • a movable push-button means 27, together with an elongated shaft member 28, provide the means for operating a movable end positioned valve member 29. The latter is shown in a closed position with respect to open end 25, as shown in FIGS. 4 and 5, or alternatively, member 29 can be pushed outwardly to have the position shown in FIG.
  • a suitable compression spring 30 may be placed in a cavity portion 31 of valve body 23 and interiorly from an inner guide portion 32 of push-button means 27.
  • a separate movable valving member or cover member 33 which is capable of covering and plugging air flow through a bleed-in orifice means 34 that is spaced within a central portion of valving member 29.
  • the member 33 shall be relatively thin and flexible so as to be readily deflectable against the inner face of the valving member 29 to in turn cover over the inner extremities of orifice openings 34 so as to preclude any bleed-in of air when there is any back pressure against the valving member 33.
  • the orifice covering member 33 is of a washer-like shape encompassing shaft 28 and in addition extends outwardly to be able to act as a washer or seal between the end portion of valve body 23 and the inner face of the principal valving member 29.
  • the deflectable valve cover member 33 is of a circular nature, it is suitable to have two or more orifices, such as 34, which may be provided at spaced points within a circular pattern through the valve member 29.
  • a single orifice of small diameter may be utilized to provide the desired rate of bleed-in to the cushioning unit.
  • FIG. 4 indicates the position for the flexible diaphragm member 33 where there can be a bleed-in of air through orifice means 34 and through an opening in the center of washershaped member 33 around shaft 28 to port means 24 and thence through conduit means (not shown) to the cushion envelope.
  • This position will exist where there is no occupant pressure on the cushioning unit and there is a depressed or vacuum condition with respect to the open-cell foam in the cushion envelope to permit ambient air to in turn flow through orifice means 34.
  • FIG. 4 indicates the position for the flexible diaphragm member 33 where there can be a bleed-in of air through orifice means 34 and through an opening in the center of washershaped member 33 around shaft 28 to port means 24 and thence through conduit means (not shown) to the cushion envelope.
  • a deflectable member 33 may be made of neoprene, leather, teflon, or any suitable flexible plastic material, or the like.
  • FIG. 6 of the drawing indicates a large peripheral air passageway into and out of the interior of the valve body so as to permit the rapid intake, or expulsion, of air with respect to the cushioning suction as will be accomplished by the movement of push-button 27 connecting to shaft 28.
  • the separate movable valving member 15 for covering orifice 18 in FIGS. 2 and 3 might well be of a different shape to in turn seat itself upon a different form of internal sealing means or the bleed-in orifice might well be placed in a different position within the valve body 8.
  • the flexible washer or diaphragm form of valving member 33 which is deflected or deformed to fit over the orifice openings could be other than a circular shape or of the washer configuration.
  • a deflectable flapper or any flexible form of valve member might well be used in a difi'erent position within the valve body of the unit and still provide for the regulated blockage of bleed-in to such times as the cushioning section is under vacuum conditions with respect to ambient air surrounding the self-adjusting cushioning unit.
  • a weight responsive support cushion unit that is adapted for supporting a particular portion of the human body, where open-cell foam cushion material is maintained in an air-tight envelope, an ambient air passageway means is provided to said envelope and a manually controllable valving means is connective with the passageway to regulate flow of ambient air pressure into and out of said envelope
  • the improvement in the valving means for the unit which comprises in combination, a body member with an air-inlet-outlet means to the interior thereof, a manually movable plug member, movement means connective to the latter to permit air flow into and out from said body through said inlet-outlet means, a separate small area bleed-in orifice to the interior of said valve body, and a separate displaceable orifice covering means for the interior face of said bleed-in orifice, whereby a vacuum condition in said envelope provides for an inward ambient air flow through the bleed-in orifice and said passageway and, conversely, a weight pressure on said envelope provides a back pressure and seating of said covering
  • the weight responsive support cushion unit of claim 1 further characterized in that the displaceable orifice covering means comprises a spring biased plug member capable of being displaced from the interior of the bleed-in orifice at such times as there is a vacuum condition with respect to ambient air around the valving means.
  • the weight responsive support cushion unit of claim 1 further characterized in that said separate displaceable orifice covering means is a flexible diaphragm member capable of being flexibly pushed against the interior of the bleed-in orifice to seal the latter and alternatively lift therefrom under vacuum conditions whereby to permit a bleed-in of air to the unit.
  • the weight responsive support cushion unit of claim I further characterized in that the bleed-in orifice comprises a plurality of small openings in a spaced clustered arrangement, whereby said covering means can provide the sealing or opening of the bleed-in orifice openings.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Seats For Vehicles (AREA)
  • Bedding Items (AREA)
US3661422D 1970-07-20 1970-07-20 Self-adjustment for body support cushion Expired - Lifetime US3661422A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US5657470A 1970-07-20 1970-07-20
GB906972A GB1377311A (en) 1970-07-20 1972-02-28 Self-adjusting body support cushion
AU39517/72A AU470855B2 (en) 1970-07-20 1972-03-01 Self-adjustment for body support cushion
FR7209082A FR2176240A5 (enExample) 1970-07-20 1972-03-15
DE2212680A DE2212680C3 (de) 1970-07-20 1972-03-16 Kissen als Rückenstütze

Publications (1)

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US3661422A true US3661422A (en) 1972-05-09

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ID=46507812

Family Applications (1)

Application Number Title Priority Date Filing Date
US3661422D Expired - Lifetime US3661422A (en) 1970-07-20 1970-07-20 Self-adjustment for body support cushion

Country Status (5)

Country Link
US (1) US3661422A (enExample)
AU (1) AU470855B2 (enExample)
DE (1) DE2212680C3 (enExample)
FR (1) FR2176240A5 (enExample)
GB (1) GB1377311A (enExample)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866627A (en) * 1972-06-21 1975-02-18 Caterpillar Tractor Co Dual check valve arrangement
US3976278A (en) * 1971-12-22 1976-08-24 The Kendall Company Valve assembly
US4770205A (en) * 1987-05-04 1988-09-13 Sundstrand Corporation Bi-directional snub valve
WO1996014783A1 (en) * 1994-11-16 1996-05-23 Cascade Designs, Inc. Self-inflating modular seat insert
US5660438A (en) * 1995-03-17 1997-08-26 Global Upholstery Company Inc. Chair having ergonomic lumbar support cushion
US20030075960A1 (en) * 2000-06-09 2003-04-24 Haworth, Inc. Inflatable lumbar support
WO2008032062A1 (en) * 2006-09-11 2008-03-20 Seating Direct (International) Limited A valve
US20160128490A1 (en) * 2014-11-07 2016-05-12 Chien-chuan Cheng Automatic inflatable cushion
US9468301B2 (en) 2013-04-30 2016-10-18 Tropitone Furniture Co., Inc. Seating with adjustable cushions
US20180201168A1 (en) * 2015-07-10 2018-07-19 Kongsberg Automotive, Inc. Lumbar Support System for a Vehicle Seat Assembly

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2096459B (en) * 1981-04-10 1984-11-07 Nissan Motor Seat having pneumatic component
ES264985Y (es) * 1982-05-06 1983-06-16 Aparato distribuidor de presion graduable y equitativa para camaras hinchables emplazadas en sillas o sillones.
GB8730151D0 (en) * 1987-12-24 1988-02-03 Mazor Ltd Cushion
DE9214219U1 (de) * 1992-10-22 1992-12-17 Völkle, Rolf, 7298 Loßburg Sitzmöbel mit Luftzellen
NL1011213C2 (nl) * 1999-02-04 2000-08-07 Emtek Ergonomics V O F Oppompbare steun.
AU2002215030A1 (en) * 2000-10-18 2002-04-29 Roder Haworth Buro-Sitzmobel Gmbh Chair
DE202014100748U1 (de) * 2014-02-20 2015-05-21 Ehni Schaumstofftechnik Gmbh Element mit wasserdichter Beschichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE267348C (enExample) *
US24618A (en) * 1859-07-05 Island
FR1125717A (fr) * 1954-06-02 1956-11-06 Steinkohlenbergbauver Distributeur de commande, comportant une soupape d'admission, une soupape d'échappement et une soupape de sûreté
US2837145A (en) * 1955-07-01 1958-06-03 Goetz Carlos Cudell Vibration insulator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE267348C (enExample) *
US24618A (en) * 1859-07-05 Island
FR1125717A (fr) * 1954-06-02 1956-11-06 Steinkohlenbergbauver Distributeur de commande, comportant une soupape d'admission, une soupape d'échappement et une soupape de sûreté
US2837145A (en) * 1955-07-01 1958-06-03 Goetz Carlos Cudell Vibration insulator

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976278A (en) * 1971-12-22 1976-08-24 The Kendall Company Valve assembly
US3866627A (en) * 1972-06-21 1975-02-18 Caterpillar Tractor Co Dual check valve arrangement
US4770205A (en) * 1987-05-04 1988-09-13 Sundstrand Corporation Bi-directional snub valve
WO1996014783A1 (en) * 1994-11-16 1996-05-23 Cascade Designs, Inc. Self-inflating modular seat insert
US5660438A (en) * 1995-03-17 1997-08-26 Global Upholstery Company Inc. Chair having ergonomic lumbar support cushion
US20030075960A1 (en) * 2000-06-09 2003-04-24 Haworth, Inc. Inflatable lumbar support
US6682145B2 (en) * 2000-06-09 2004-01-27 Haworth, Inc. Inflatable lumbar support
WO2008032062A1 (en) * 2006-09-11 2008-03-20 Seating Direct (International) Limited A valve
US9468301B2 (en) 2013-04-30 2016-10-18 Tropitone Furniture Co., Inc. Seating with adjustable cushions
US20160128490A1 (en) * 2014-11-07 2016-05-12 Chien-chuan Cheng Automatic inflatable cushion
US20180201168A1 (en) * 2015-07-10 2018-07-19 Kongsberg Automotive, Inc. Lumbar Support System for a Vehicle Seat Assembly
US10471868B2 (en) * 2015-07-10 2019-11-12 Kongsberg Automotive, Inc. Lumbar support system for a vehicle seat assembly

Also Published As

Publication number Publication date
AU3951772A (en) 1973-09-06
DE2212680A1 (de) 1973-10-04
DE2212680C3 (de) 1974-09-12
FR2176240A5 (enExample) 1973-10-26
GB1377311A (en) 1974-12-11
AU470855B2 (en) 1976-04-01
DE2212680B2 (de) 1974-02-14

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