US Patent No: 7,040,709

Number of patents in Portfolio can not be more than 2000

Back construction for seating unit having inverted U-shaped frame

ALSO PUBLISHED AS: 20050179292

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Importance

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Abstract

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A back construction includes an inverted U-shaped back frame and a back shell supported on the back frame and having stiff thoracic and pelvic regions connected by a flexible lumbar region in a manner adapted to ergonomically support a seated user. The lumber section includes a plurality of vertically spaced slots to increase its flexibility. The back shell has a complex curved shape that is forwardly concave in horizontal cross section and forwardly convex in vertical cross section. A force-generating mechanism biases the lumber section forwardly for lumbar support to a seated user.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
STEELCASE INC.GRAND RAPIDS, MI577

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dammermann, Arnold B Winona, MN 43 1038
DeKraker, Larry Holland, MI 46 1640
Heidmann, Kurt R Grand Rapids, MI 142 2386
Knoblock, deceased Glenn A Fort Collins, CO 3 98
Knoblock, legal representative Daryl Fort Collins, CO 5 185
Peterson, Gordon J Rockford, MI 81 1378
Roossien, Charles P Wyoming, MI 32 1066
Teppo, David S East Grand Rapids, MI 44 1185

Cited Art Landscape

Patent Info (Count) # Cites Year
 
STEELCASE DEVELOPMENT CORPORATION (19)
4,314,728 Chair control 45 1980
4,390,206 Synchrotilt chair control 78 1980
4,720,142 Variable back stop 65 1986
4,776,633 Integrated chair and control 118 1986
4,951,995 Arm height adjustment mechanism for a chair 60 1989
5,249,839 Split back chair 88 1991
5,320,410 Chair control 51 1992
5,328,242 Chair with back lock 38 1992
5,282,670 Cable actuated variable stop mechanism 34 1992
5,385,388 Split back chair 118 1993
5,540,481 Chair with zero front rise control 35 1994
5,487,591 Back shell with selective stiffening 61 1994
5,577,807 Adjustable chair actuator 96 1994
5,782,536 Modular chair construction and method of assembly 58 1995
5,630,647 Tension adjustment mechanism for chairs 78 1995
5,611,598 Chair having back shell with selective stiffening 53 1996
5,871,258 Chair with novel seat construction 168 1997
5,975,634 Chair including novel back construction 146 1997
6,003,943 Multi-function control for chair 25 1998
 
Herman Miller, Inc. (5)
5,106,157 Chair height and tilt adjustment mechanisms 50 1989
5,192,114 Tilt adjustment control for a chair 40 1991
6,035,901 Woven fabric membrane for a seating surface 159 1995
6,250,715 Chair 44 1999
6,367,876 Chair 34 2001
 
KNOLL, INC. (3)
4,380,352 Reclining chair 71 1980
4,906,045 Chair control for a pedestal chair having a knee-tilt seat 31 1989
5,029,940 Chair tilt and chair height control apparatus 72 1990
 
L&P PROPERTY MANAGEMENT COMPANY (3)
4,948,198 Knee-tilt chair control 18 1988
5,518,294 Variable apex back support 128 1994
5,651,584 Lumbar support structure for automotive vehicle 75 1995
 
DEPERRY, SHIELA H. (2)
5,009,466 Reclining chair 51 1989
5,338,094 Flexible reclining chair 32 1993
 
J. E. Ekornes A/S (2)
4,984,846 Arrangement in an adjustable chair 41 1989
5,472,261 Arrangement in a recline chair 45 1993
 
JASON INCORPORATED (2)
4,621,864 Tiltable arm rest assembly and mounting and operating means therefor 46 1984
4,709,963 Adjustable office chair 82 1986
 
STANT MANUFACTURING INC. (2)
4,913,303 Liquid splash control fuel cap 48 1988
5,529,201 Cam-on filler neck cap 40 1994
 
STANT USA CORP. (2)
5,110,003 Torque-override cap 54 1990
5,449,086 Delayed actuation fuel cap 52 1993
 
Steelcase Strafor (2)
4,981,326 Ergonomic chair 93 1988
5,915,788 Multi-function control for chair 23 1997
 
TACHI-S CO., LTD. (2)
5,044,693 Seat back structure of an automotive seat 41 1989
5,087,098 Lumbar support device 35 1990
 
AISIN SEIKI KABUSHIKI KAISHA (1)
4,896,918 Lumbar support regulating apparatus 28 1988
 
AMERICAN SEATING COMPANY (1)
4,861,108 Auditorium seat 39 1988
 
B.V. LINIDO, A CORP. OF THE NETHERLANDS (1)
5,447,356 Chair for disabled persons 44 1992
 
BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY (1)
5,597,203 Seat with biomechanical articulation 65 1994
 
Castelli S.p.A. (1)
4,585,272 Chair having a back comprising a plurality of articulated segments 113 1983
 
Center for Design Research and Development N.V. (1)
4,333,683 Chair with automatically adjustable tilting back 62 1979
 
CESA - COMPAGNIE EUROPEENNE DE SIEGES POUR AUTOMOBILES (1)
5,567,017 Framework element for a seat, component making use thereof, and its use especially for vehicle seat 17 1995
 
Chairtech (1)
5,718,476 Seat with adjustable lumbar support 63 1996
 
Duphin Entwicklungs-u. Beteiligungs-GmbH (1)
5,564,783 Chair, in particular office chair 24 1994
 
Engineered Components, Inc. (1)
5,277,475 One piece back support for a chair 32 1992
 
Etablissements Linguanotto (1)
4,685,730 Seat, especially work seat, with several positions 69 1985
 
FIAT AUTO S.P.A. (1)
4,968,093 Adjustable backrest for the seats of vehicles, particularly cars 76 1989
 
FINDLAY INDUSTRIES, INC. (1)
5,217,278 Mechanism for providing adjustable lumbar support in a seat 162 1991
 
FISHER DYNAMICS CORPORATION (1)
5,590,932 Anti-chuck seat recliner 43 1994
 
FORD GLOBAL TECHNOLOGIES, INC. (1)
5,505,520 Passenger seat with adjustable lumbar support 66 1994
 
FORD MOTOR COMPANY (1)
4,638,679 Adjusting mechanism for a Bowden cable 17 1984
 
FRITZ HANSEN A/S (1)
5,340,197 One-piece seat shell 10 1992
 
Girsberger Holding AG (1)
4,834,453 Swivel chair 38 1987
 
GISPEN + STAALMEUBEL B.V. (1)
4,521,053 Chair 64 1982
 
GRAMMER SITZYSYSTEME GMBH, WERNHER-VON-BRAUN-STRASSE 6, 8450 AMBERG-I, F.R.G. (1)
4,842,333 Seat 23 1988
 
Haworth, Inc. (1)
4,595,237 Actuating control for seat height adjustment mechanism 48 1984
 
ITOKI CREBIO CORPORATION (1)
5,582,459 Chair having tiltable seat back 61 1994
 
J.G. Furniture Systems, Inc. (1)
5,100,201 Passive ergonomic work chair 55 1990
 
KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO (1)
5,027,022 Reverse rotation preventing mechanism for synchronous motors 18 1990
 
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho (1)
4,449,752 Vehicle seat position control mechanism with neutral memory 25 1979
 
Keiper Automobiltechnik GmbH & Co. KG (1)
4,544,204 Back frame for seat, particularly for power vehicle seat 43 1982
 
KIMBALL INTERNATIONAL, INC. (1)
5,308,145 Reclining chair 38 1992
 
L&P/YOUNG SPRING ACQUISITION COMPANY, INC., A CORP. OF DE (1)
4,880,271 Adjustable lumbar support 80 1988
 
LANE FURNITURE INDUSTRIES, INC. (1)
5,056,862 Recessed lever actuator for recliner mechanism 26 1990
 
LEGGETT & PLATT, INCORPORATED (1)
4,889,384 Knee-action chair control 50 1988
 
MDT CORPORATION (1)
5,405,188 Mechanical chair 32 1993
 
Nepsco, Inc. (1)
4,502,728 Portable seat and back rest 51 1982
 
PLASTIC INDUSTRIES, INC. (1)
5,107,720 Device for actuating a remotely positioned latch 30 1991
 
PRO-CORD S.R.L., AN ITALIAN LIMITED COMPANY (1)
4,915,449 Chair with a pivoting seat 33 1989
 
PROTONED B.V. (1)
4,316,632 Ergonomic chair 35 1979
 
PROTONED B.V., HERENGRACHT 374/376 NL 1016 CH AMSTERDAM (HOLLAND) (1)
4,703,974 Seat furniture 58 1985
 
Provenda Marketing AG (1)
4,763,950 Tilting chair, especially office chair 45 1986
 
ROHO, INC. (1)
5,364,162 Backrest assembly for a wheelchair 53 1991
 
SCHUKRA GERATEBAU AG (1)
5,050,930 Lordosis-support backrest for a vehicle seat 108 1990
 
Shelby Williams Industries, Inc. (1)
5,039,163 Reinforced flexible backrest assembly for a chair 58 1989
 
SHIROKI CORPORATION (1)
5,302,002 Hip supporting apparatus of seat 26 1991
 
SICAM, SPA (1)
5,120,109 Motor vehicle seat 52 1989
 
SKW Trostberg Aktiengesellschaft (1)
4,309,206 Process for the production of odorless prilled urea-dicyandiamide fertilizers 12 1980
 
Special Health Systems Ltd. (1)
5,573,302 Lower back support 34 1994
 
Tachikawa Spring Co., Ltd. (1)
4,641,884 Seat for vehicles 44 1986
 
TAKANO CO., LTD. (1)
5,102,196 Chair provided with a backrest 104 1990
 
TRUMOVE DESIGNS INC. (1)
5,660,439 Integrated seat and back and mechanisms for chairs 67 1995
 
WILKHAHN WILKENING + HAHNE GMBH + CO. (1)
5,366,274 Synchronous adjusting device for office chairs or the like 55 1993
 
Other [Check patent profile for assignment information] (13)
4,465,317 Mechanism for adjusting a lumbar support of a back of a seat or the like 58 1981
4,621,866 Armchair structure having an adjustable anatomical configuration 21 1985
4,779,925 Height-adjustable swivel chair equipped with gas-pressure spring, especially office chair or office armchair 45 1987
4,848,837 Chair having a pelvis-hip support adjustable relative to a front seat portion 52 1987
4,966,413 Articulated relaxation chair 53 1989
5,062,676 Adjustable chair 36 1990
4,993,164 Measuring device 40 1990
5,240,308 Ergonomic adjustable chair and method 42 1991
5,112,108 Seating furniture 22 1991
5,354,120 Reclining chair 76 1992
5,299,851 Adjustable cushion assembly for a chair 57 1993
5,460,427 Seat assembly and method 66 1993
5,474,360 Seatback recliner mechanism 27 1995

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
FAURECIA AUTOMOTIVE SEATING, LLC (1)
8,857,908 Controllable comfort shell for vehicle seat 0 2010
 
Haworth, Inc. (1)
8,272,693 Tension mechanism for a weight-responsive chair 0 2010
 
Herman Miller, Inc. (1)
8,449,037 Seating structure with a contoured flexible backrest 0 2011
 
ITOKI CORPORATION (1)
7,896,439 Chair 1 2006
 
STEELCASE INC. (1)
7,841,665 Height adjustable armrest 35 2007
 
Other [Check patent profile for assignment information] (1)
D545089 Chair frame 0 2005

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 Nov 9, 2017
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00