US3724144A - Reinforcing structure for bodies with curved load-supporting surfaces - Google Patents

Reinforcing structure for bodies with curved load-supporting surfaces Download PDF

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Publication number
US3724144A
US3724144A US00098003A US3724144DA US3724144A US 3724144 A US3724144 A US 3724144A US 00098003 A US00098003 A US 00098003A US 3724144D A US3724144D A US 3724144DA US 3724144 A US3724144 A US 3724144A
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United States
Prior art keywords
column
reinforcing structure
elements
wedge
sleeve
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Expired - Lifetime
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US00098003A
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English (en)
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W Schuster
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    • 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
    • A47C7/42—Supports for the head or the back for the back of detachable or loose type
    • A47C7/425—Supplementary back-rests to be positioned on a back-rest or the like
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C20/00—Head-, foot- or like rests for beds, sofas or the like
    • A47C20/02—Head-, foot- or like rests for beds, sofas or the like of detachable type
    • A47C20/027—Back supports, e.g. for sitting in bed
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C23/00—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases
    • A47C23/12—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using tensioned springs, e.g. flat type
    • A47C23/28—Tensioning devices therefor
    • 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
    • A47C7/462—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means

Definitions

  • a tensionable internal reinforcing structure for a mattress, seat cushion or the like comprising one or more elongate tension members each traversing a column of [30]
  • Foreign Apphcauon Pmmty Data mutually abutting pressure elements to form a collap- Dec. 12,1969 Austria ..A 11611/69 ible armature includes several wedge pieces which are inserted between adjoining pressure elements to U-S. R, a desired curvature to the armatufe
  • the 5/DIG- 2, 297/284 wedge pieces may be in the form of longitudinally [51] Int.
  • My present invention relates to a reinforcing structure for seats, mattresses and other load-supporting structures whose effective resiliency is to be adjusted from time to time to compensate for fatiguing of materials or to accommodate different loads or load distributions, as described in my prior U.S. Pat. No.3,490,084.
  • Such a reinforcing structure includes one or more collapsible armatures each comprising a cable or similar elongate tension member which traverses a multiplicity of juxtaposed and mutually abutting pressure elements of generally tubular shape forming a column therearound.
  • collapsible armatures each comprising a cable or similar elongate tension member which traverses a multiplicity of juxtaposed and mutually abutting pressure elements of generally tubular shape forming a column therearound.
  • the general object of my present invention is to provide an improved reinforcing structure of the type disclosed in my above-identified patent in which the curvature of any armature may be modified merely upon a slackening thereof, thus without disassembly, to bend or to straighten its column to any desired extent within wide limits.
  • Another object of my invention is to provide means in such a structure for positively maintaining the orientation of a curved armature with reference to the loadsupporting body to which it is anchored.
  • I provide one or more wedge pieces adapted to be detachably inserted between any two pressure elements of a column in the slackened state of the armature for imparting curvature thereto in its rigidified state.
  • a wedge piece may be-a longitudinally slitted sleeve which should be sufficiently resilient to be clipped either onto the central tension member (possibly with interposition of a coil spring or a helically wound wire surrounding that member) or onto one of the pressure elements originally in the column.
  • the sleeve may be simply inserted between two pressure elements, e.g., after removal of a third pressure element which originally separated these two elements and which may also be slitted longitudinally to facilitate such removal.
  • the sleeve may be formed with at least one segmental end flange unilaterally projecting between the engaged pressure element and an adjoiningelement for partly separating same from each other, the imparted curvature thus depending upon the wedging effect of this flange.
  • An adjustable wedging effect may be realized by the use of a wedge piece of generally trapezoidal axial cross-section, permanently installed or laterally insertable as described above, with a tapering layer of elastically compressible material adhering to either or both of its end faces, this layer being subjected to adjustable pressure by an extension of the sleeve hingedly connected therewith at the corresponding end face.
  • each of these wedge pieces should be secured against rotation relative to the remainder of the column in order to preserve the desired direction of curvature.
  • retaining means may comprise, particularly in the case of a slitted sleeve, a clamp embracing that sleeve and overlying its axis slot, the sleeve being preferably urged into firm contact with the surrounding clamp by the aforementioned coil spring wound about the inner tension member.
  • a clamp may be simply a ring with external ribs or the like taking hold on the surrounding body material; it could also be joined to a strap tied in similar manner to a like wedge piece of an adjoining second armature.
  • FIG. 1 is a fragmentary plan view (similar to FIG. 14 of my above-identified prior patent) of a reinforcing structure embodying my present improvement, with parts broken away;
  • FIG. 2 is a partial side view (also with parts broken away) of the structure of FIG. 1, taken on the line II-II thereof;
  • FIG. 3 is a sectional elevational view, drawn to a larger scale, of part of another embodiment
  • FIG. 4 is a perspective view of a chair with a backrest incorporating a structure according to the invention.
  • FIG. 5 is a perspective view of part of a hospital bed with a back support incorporating a structure according to the invention
  • FIG. 6 is a set of simplified perspective views of such a reinforcing structure in three different positions of adjustment
  • FIG. 7 is an end view of a wedge piece shown adjacent a tension member of an armature according to the invention.
  • FIG. 8 is a side view of the wedge piece of FIG. 7;
  • FIG. 9 is a view similar to FIG. 3, illustrating another modification
  • FIG. 10 is a perspective view of an element of the assembly of FIG. 9;
  • FIG. 11 is a side view of another modified wedge piece according to the invention.
  • FIG. 12 is a view similar to FIG. 11, showing the wedge piece thereof in a compressed state
  • FIG. 13 is an end view of the wedge piece shown in FIGS. 11 and 12; I
  • FIG. 14 is a view similar to FIG. 12, illustrating a further variant of the wedge piece
  • FIG. 15 is an end view of the wedge piece of FIG. 14;
  • FIG. 16 is a cross-sectional view taken on the line XVI XVI of FIG. 2;
  • FIG. 17 is a cross-sectional view taken on the line XVII XVII of FIG. 3.
  • FIGS. 1, 2 and 16 I have shown a representative portion of a reinforcing structure including a pair of parallel armatures 10, 10' disposed in or next to a mattress, seat cushion or similar load-supporting body not shown in these Figures, e.g., a backrest 79 of a chair 80 (FIG. 4) or a back support 82 on a mattress 82a (FIG. 5).
  • Each armature 10, comprises a tension member in the form of a cable 8, 8 surrounded by a coil spring 65; the cable and the coil spring are threaded through a column of mutually abutting tubular pressure elements 7, 7' of any compression-resisting material.
  • Cables 8 and 8' are anchored by means of terminals 9, 9 to a transverse bar 54 which, together with a similar bar 55, flanks a third bar 53 articulated to these outer bars by respective pairs of links 56, 56'.
  • the columns of pressure elements 7, 7' bear at one end upon the bar 55 and are secured at the opposite end, not shown, to the respective cables 8, 8'.
  • the bars 54, 55 are shiftable with reference to bar 53 by the hollow stem 58 of a knob, such as that shown at 81 in FIG. 4, which is journaled in a collar.59 and threadely engages a bolt 57 rigid with bar 53.
  • FIG. 16 shows the wedge piece 61 (identical in shape with piece 61) as longitudinally slitted at 61a, thereby giving clearance to the cable 8 and the surrounding coil spring 65 when the piece 61 is clipped onto or pulled off the armature core in the slackened state thereof.
  • Accidental detachment of the wedge pieces 61, 61' is prevented by a pair of clamps 62, 62'
  • One or more additional straps 62a can be used to impart additional stability to the structure.
  • elements 7 and 7' may also be longitudinally slitted, as shown at 7a and 7a, to facilitate their removal from the column for replacement by wedge pieces 61, 61 Special clamps such as those associated with strap 60a may help prevent untimely detachment of these slitted pressure elements.
  • FIG. 3 there is shown an armature imbedded in a body 70, e.g., a cushion of foam plastic or the like,
  • wedge pieces which includes a tension cable 64 surrounded by a coil spring 65 and threaded through a series of regular cylindrical pressure elements 66 with parallel end faces interspersed with wedge pieces 67, 68, 69 of trapezoidal axial cross-section.
  • These wedge pieces may have longitudinal throughgoing slots 68a, as illustrated for the piece 68 in FIG. 17, and are shown surrounded by respective clamping rings 71, 72, 73 having external ribs 71a, 72a, 73a which bite into the surrounding foam material to prevent appreciable rotation of the rings and therefore of the wedge pieces about their axes.
  • the clamping rings 71-73 may be slid onto an adjoining pressure element 66 when it is desired to remove the corresponding wedge piece from the column, with or without replacement of that wedge piece by another slitted element of different profile.
  • FIGS. 9 and 10 show a column of cylindrical and straight-faced pressure elements 74 on a cable 64, some of these pressure elements being embraced by slightly larger longitudinally slitted sleeves 77 with segmental end flanges 75, 76 of wedge-shaped, substantially triangular cross-section projecting unilaterally between adjoining elements 74 to hold them at an angle to one another, thereby again imparting a certain curvature (here an upward camber) to the column.
  • a reduced tongue 78 defines with the flanged part of the sleeve an axially extending slot 77a by which it may be clipped onto any pressure element 74 in the slackened state of the armature.
  • wedge piece 77 When the cable 64 is stretched taut, the clamping pressure exerted upon flanges and 76 by the adjoining elements 74 prevents any relative rotation of wedge piece 77. If desired, several such wedge pieces may again be interconnected by transverse straps, similar to the one shown at 63 in FIGS. 1 and 2, for simultaneous attachment to and removal from adjoining armatures.
  • FIG; 6 schematically illustrates a complete reinforcing structure according to the invention, including a series of parallel armatures 84 terminating in cross-bars 85, 86 against which their tension members may be stressed by any suitable means such as the various tensioning devices described in my above-identified prior patent.
  • the structure can be given a more or less pronounced curvature as illustrated at (a), (b) and (c) in FIG. 6.
  • FIGS. 7 and 8 show a wedge piece 89 of sickleshaped cross-section fitting onto a tension cable 88 without interposition of any coil spring or the like.
  • FIGS. 1 l13 show a similar wedge piece 89 in the form of a somewhat wider sleeve 90 of the same generally sickle-shaped profile and trapezoidal axial section defined by two beveled end faces 91, 92 which carry elastically compressible layers 93 and 94 of complementarily tapering profile.
  • the outline of unit 89 is substantially rectangular so that, as long as the compression resistance of layers 93 and 94 exceeds the stress of the associated tension cable, the part of the column containing this unit together with similar or ordinary (straight-faced) compression elements remain substantially straight.
  • the column flexes progressively in the direction of divergence of end faces 93, 94.
  • FIGS. 14 and I have illustrated a unit 89' of this general construction provided with extensions 95, 96 on its sleeve 90 for precompressing the resilient layers 93', 94' on its end faces 91', 92 independently of the cable-stressing mechanism.
  • These extensions articulated to the sleeve by hinges 97, 98, form a pair of tongs whose clamping pressure may be adjusted by a holding screw 99 with the aid of a nut 99a.
  • the armature embodying the present improvement need not be constituted by a single column but may be subdivided into several columns with independently tensionable cables or the like.
  • the stressing of the tension member or members may be carried out by hand, as illustrated in FIG. 4, or by automatic means including conventional sensors responsive to ambient conditions such as temperature,
  • the stress of the tension members and therefore the curvature of the patients mattress or other body support may be controlled by instruments measuring such medical data as respiration, pulse rate or heartbeat. It is also possible to vary this tension in a diurnal rhythm under the control of an automatic timer.
  • the invention in at least some of its aspects is not limited to wedge pieces threaded onto a central core.
  • Elements such as those shown at 89 in FIGS. 1113, for example, could be inserted end-to-end (or with interposition of straightfaced cylindrical blocks) in an elastic hose acting as the tension member, e.g., as shown in FIGS. 13-15 of my prior U.S. Pat. No.3,492,768; in this case, of course, the beveled compression elements need not be tubular but may be completely solid.
  • a reinforcing structure for a load-supporting body comprising:
  • a reinforcing structure for a load-supporting body comprising:
  • a reinforcing structure for a load-supporting body comprising:
  • armatures each including an elongate tension member and a column of mutually abutting pressure elements of generally tubular shape traversed by said member;
  • stressing means engaging said member and said column for selectively slackening and rigidifying each armature
  • At least one wedge piece of generally tubular shape detachably inserted between two of said elements and traversed by said member for imparting curvature to said armature in the rigiditied state thereof;
  • a reinforcing structure for a load-supporting body comprising:
  • At least one armature including an elongate tension member and a column of mutually abutting presvvith at least one segmental end flange unilaterally projecting between said one of said elements and an adjoining pressure element for partly separating same from each other while being clamped in position therebetween.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
US00098003A 1969-12-12 1970-12-14 Reinforcing structure for bodies with curved load-supporting surfaces Expired - Lifetime US3724144A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1161169A AT306949B (de) 1969-12-12 1969-12-12 Bespannung für Liege-, Sitz- und Stützflächen aller Art
AT222071A AT308318B (de) 1969-12-12 1969-12-12 Bespannung für Liege-, Sitz- und Stützflächen aller Art

Publications (1)

Publication Number Publication Date
US3724144A true US3724144A (en) 1973-04-03

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US00098003A Expired - Lifetime US3724144A (en) 1969-12-12 1970-12-14 Reinforcing structure for bodies with curved load-supporting surfaces

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Country Link
US (1) US3724144A (de)
AT (2) AT308318B (de)
DE (1) DE2040794C3 (de)
FR (1) FR2065915A6 (de)
SE (1) SE372698B (de)

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851430A (en) * 1973-03-07 1974-12-03 W Schuster Resilient supporting member
US4316631A (en) * 1979-01-24 1982-02-23 Steyr-Daimler-Puch Aktiengesellschaft Backrest
US4354709A (en) * 1978-06-23 1982-10-19 Wilhelm Schuster Flexible elastic support
US5299851A (en) * 1993-05-19 1994-04-05 Lin Kuen Yuan Adjustable cushion assembly for a chair
US5462335A (en) * 1994-08-18 1995-10-31 Perfection Spring & Stamping Corp. Adjustable lumbar support for seat backs
US5494332A (en) * 1993-05-19 1996-02-27 Daniel; Machfud Chair with orthopedic back support
US5573302A (en) * 1994-11-08 1996-11-12 Harrison; Patrick N. Lower back support
US5609394A (en) * 1996-02-23 1997-03-11 Ligon Brothers Manufacturing Company Four-way lumbar support
US6619739B2 (en) 2001-03-01 2003-09-16 L & P Property Management Company Universal ergonomic support with self-contained actuator
US6623076B2 (en) 1993-06-17 2003-09-23 Schukra-Gerätebau AG Adjustment apparatus for a resiliently flexible support element of a back rest
US6652029B2 (en) 2001-12-20 2003-11-25 L & P Property Management Company Unitized back plate and lumbar support
US6652028B2 (en) 2001-11-02 2003-11-25 L & P Property Management Apparatus and method for lumbar support with variable apex
US6666511B2 (en) 1989-08-04 2003-12-23 Schukra Geratebau Ag Arching mechanism and method of use
US6676214B2 (en) 2001-11-16 2004-01-13 L & P Property Management Company Method and apparatus for lumbar support with integrated actuator housing
US6758522B2 (en) 2001-03-29 2004-07-06 L&P Property Management Company Apparatus and method for varying coefficients of friction in a variable apex back support
US20040140700A1 (en) * 2003-01-22 2004-07-22 Mcmillen Robert J. Fold down seat lumbar support apparatus and method
US20040140705A1 (en) * 2003-01-22 2004-07-22 L & P Property Management Company Automatically actuating ergonomic support system for a fold down seat
US20040155501A1 (en) * 2003-01-22 2004-08-12 Mcmillen Robert J. Fold down seat lumbar support apparatus and method
US6779844B2 (en) 2001-12-14 2004-08-24 L&P Propety Maqnagement Company Arching lumbar support with weight distribution surface
US6908153B2 (en) 2002-12-02 2005-06-21 L&P Property Management Company Power lumbar support cable apparatus and method
US6908152B2 (en) 2001-12-14 2005-06-21 L & P Property Management Company Push lumbar support with flexible pressure surface
US6938955B2 (en) 2001-10-11 2005-09-06 L&P Property Management Co. Power lumbar mechanism
US7000986B2 (en) 2001-09-28 2006-02-21 Ficosa North America Lumbar support apparatus
US7052087B2 (en) 2002-12-09 2006-05-30 L&P Property Management Company Method and apparatus for a scissors ergonomic support
US7083232B2 (en) 2002-11-01 2006-08-01 L&P Property Management Company Massage apparatus and method for lumbar support
US20060267382A1 (en) * 2005-05-18 2006-11-30 Schukra Of North America Arm rest return
US20070228789A1 (en) * 2006-03-30 2007-10-04 Schukra Of North America Combination Lumbar-Bolster System
US20070239090A1 (en) * 2006-03-31 2007-10-11 Schukra Of North America Massage System
US20070236039A1 (en) * 2004-02-06 2007-10-11 L8 P Property Management Company Drive Mechanism
US20070296256A1 (en) * 2004-07-30 2007-12-27 Renato Colja Modular Contour Support Apparatus
US20080265649A1 (en) * 2007-04-24 2008-10-30 Schukra Of North America, Ltd. Lumbar and Bolster Support for Second Row Seat
US20080284232A1 (en) * 2005-01-12 2008-11-20 L&P Swiss Holding Company Coupling Unit and Adjusting Mechanism Using the Coupling Unit
US20090005817A1 (en) * 2007-04-30 2009-01-01 Adam Friedrich Flexible Spine Stabilization System
US20090096263A1 (en) * 2005-01-12 2009-04-16 L&P Swiss Holding Company Lumbar Support Assembly and Corresponding Seat Structure
US7614696B2 (en) 2006-12-11 2009-11-10 Schukra Of North America Lumbar system for climate seating
US7997650B2 (en) 2008-02-22 2011-08-16 Schukra Of North America Constant pressure retreating lumbar system
US9179940B2 (en) 2005-12-06 2015-11-10 Globus Medical, Inc. System and method for replacement of spinal motion segment
DE102006045957B4 (de) * 2006-09-27 2017-01-19 F.S. Fehrer Automotive Gmbh Fahrzeugsitz für unterschiedliche Fahrzeugtypen und Sitzelement mit eingeschäumtem Unterfederungsmodul zur Herstellung eines solchen Fahrzeugsitzes

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AT377484B (de) * 1978-09-06 1985-03-25 Steyr Daimler Puch Ag Rueckenlehne, insbesondere fuer kraftfahrzeugsitze
DE2947472A1 (de) * 1979-01-24 1980-08-07 Steyr Daimler Puch Ag Rueckenlehne, insbesondere fuer kraftfahrzeugsitze
GB2045076B (en) * 1979-03-21 1983-02-23 Uop Inc Load supporting frame in particular for the back rest of a vehicle seat
FR2589703A1 (fr) * 1985-09-24 1987-05-15 Ind Tech Ameublemen Garnissage pour siege convertible notamment pour banquette transformable en lit
EP0322535A1 (de) * 1987-12-28 1989-07-05 Wickes Manufacturing Company Verstellbare Lendenstütze
IT1239943B (it) * 1990-03-09 1993-11-27 Lorenza Sessini Cuscinetto per sostegno anatomico, in specie lombare e cervicale, per gli schienali dei sedili
US6805680B2 (en) 1994-12-09 2004-10-19 Schukra-Geratebau Ag Method for providing a massage on seats, and a device for implementing this method
CA2181776A1 (en) * 1996-07-22 1998-01-23 Christopher Cosentino Shape-adjusting mechanism for backrest
EP1150592B1 (de) 1999-02-12 2004-04-28 Schukra of North America Ltd. Einstellbare rückenstütze für sitze
CA2268046C (en) 1999-04-07 2004-03-02 Christopher Cosentino Adjustment mechanism with slidable shaft
CA2268481C (en) 1999-04-08 2004-06-22 Tony Maier Unitary adjustable seat basket
EP2617326B1 (de) * 2012-01-21 2014-10-15 Petra Jeske Rückenstütze

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US3059249A (en) * 1959-04-23 1962-10-23 Englander Co Inc Adjustable box spring
US3289222A (en) * 1963-11-04 1966-12-06 Firm Allan Christensen & Co Device for an adjustable bed or chair
US3349526A (en) * 1959-12-04 1967-10-31 Schuster Wilhelm Collapsible structural unit, reversibly resilient in a predetermined direction and rigid in a second predetermined direction
US3490084A (en) * 1967-01-25 1970-01-20 Wilhelm Schuster Resilient support

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US3059249A (en) * 1959-04-23 1962-10-23 Englander Co Inc Adjustable box spring
US3349526A (en) * 1959-12-04 1967-10-31 Schuster Wilhelm Collapsible structural unit, reversibly resilient in a predetermined direction and rigid in a second predetermined direction
US3289222A (en) * 1963-11-04 1966-12-06 Firm Allan Christensen & Co Device for an adjustable bed or chair
US3490084A (en) * 1967-01-25 1970-01-20 Wilhelm Schuster Resilient support

Cited By (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851430A (en) * 1973-03-07 1974-12-03 W Schuster Resilient supporting member
US4354709A (en) * 1978-06-23 1982-10-19 Wilhelm Schuster Flexible elastic support
US4316631A (en) * 1979-01-24 1982-02-23 Steyr-Daimler-Puch Aktiengesellschaft Backrest
US6666511B2 (en) 1989-08-04 2003-12-23 Schukra Geratebau Ag Arching mechanism and method of use
US5299851A (en) * 1993-05-19 1994-04-05 Lin Kuen Yuan Adjustable cushion assembly for a chair
US5494332A (en) * 1993-05-19 1996-02-27 Daniel; Machfud Chair with orthopedic back support
US6623076B2 (en) 1993-06-17 2003-09-23 Schukra-Gerätebau AG Adjustment apparatus for a resiliently flexible support element of a back rest
US6883867B2 (en) 1993-06-17 2005-04-26 Schukra Geratebau Ag Device for adjusting a flexible support element of a backrest
US20040075320A1 (en) * 1993-06-17 2004-04-22 Schukra Geratebau Ag Device for adjusting a flexible support element of a backrest
US5462335A (en) * 1994-08-18 1995-10-31 Perfection Spring & Stamping Corp. Adjustable lumbar support for seat backs
US5573302A (en) * 1994-11-08 1996-11-12 Harrison; Patrick N. Lower back support
US5609394A (en) * 1996-02-23 1997-03-11 Ligon Brothers Manufacturing Company Four-way lumbar support
US7077476B2 (en) 2001-03-01 2006-07-18 L&P Property Management Company Universal ergonomic support with self-contained actuator
US6619739B2 (en) 2001-03-01 2003-09-16 L & P Property Management Company Universal ergonomic support with self-contained actuator
US6824214B2 (en) 2001-03-01 2004-11-30 L & P Property Management Company Universal ergonomic support with self-contained actuator
US20050035637A1 (en) * 2001-03-01 2005-02-17 Mcmillen Robert James Universal ergonomic support with self-contained actuator
US6758522B2 (en) 2001-03-29 2004-07-06 L&P Property Management Company Apparatus and method for varying coefficients of friction in a variable apex back support
US7000986B2 (en) 2001-09-28 2006-02-21 Ficosa North America Lumbar support apparatus
US6938955B2 (en) 2001-10-11 2005-09-06 L&P Property Management Co. Power lumbar mechanism
US6652028B2 (en) 2001-11-02 2003-11-25 L & P Property Management Apparatus and method for lumbar support with variable apex
US20040245824A1 (en) * 2001-11-02 2004-12-09 L & P Property Management Company Apparatus and method for lumbar support with variable apex
US6676214B2 (en) 2001-11-16 2004-01-13 L & P Property Management Company Method and apparatus for lumbar support with integrated actuator housing
US6779844B2 (en) 2001-12-14 2004-08-24 L&P Propety Maqnagement Company Arching lumbar support with weight distribution surface
US6908152B2 (en) 2001-12-14 2005-06-21 L & P Property Management Company Push lumbar support with flexible pressure surface
US6652029B2 (en) 2001-12-20 2003-11-25 L & P Property Management Company Unitized back plate and lumbar support
US7083232B2 (en) 2002-11-01 2006-08-01 L&P Property Management Company Massage apparatus and method for lumbar support
US6908153B2 (en) 2002-12-02 2005-06-21 L&P Property Management Company Power lumbar support cable apparatus and method
US7052087B2 (en) 2002-12-09 2006-05-30 L&P Property Management Company Method and apparatus for a scissors ergonomic support
US6905170B2 (en) 2003-01-22 2005-06-14 L & P Property Management Company Fold down seat lumbar support apparatus and method
US20040140700A1 (en) * 2003-01-22 2004-07-22 Mcmillen Robert J. Fold down seat lumbar support apparatus and method
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Also Published As

Publication number Publication date
DE2040794B2 (de) 1977-11-17
FR2065915A6 (de) 1971-08-06
DE2040794A1 (de) 1971-07-08
AT308318B (de) 1973-06-25
SE372698B (de) 1975-01-13
AT306949B (de) 1973-04-25
DE2040794C3 (de) 1978-07-20

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