Back construction for seating unit having inverted U-shaped frame

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7040709
APP PUB NO 20050179292A1
SERIAL NO

11047898

Stats

ATTORNEY / AGENT: (SPONSORED)

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, MI678

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dammermann, Arnold B Winona, MN 34 1388
DeKraker, Larry Holland, MI 35 2111
Heidmann, Kurt R Grand Rapids, MI 113 3204
Knoblock, deceased Glenn A Fort Collins, CO 3 155
Knoblock, legal representative Daryl Fort Collins, CO 5 276
Peterson, Gordon J Rockford, MI 66 2179
Roossien, Charles P Wyoming, MI 25 1374
Teppo, David S East Grand Rapids, MI 34 1534

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Chairtech (1)
* 5718476 Seat with adjustable lumbar support 82 1996
 
Other [Check patent profile for assignment information] (13)
4465317 Mechanism for adjusting a lumbar support of a back of a seat or the like 75 1981
4621866 Armchair structure having an adjustable anatomical configuration 21 1985
4779925 Height-adjustable swivel chair equipped with gas-pressure spring, especially office chair or office armchair 46 1987
4848837 Chair having a pelvis-hip support adjustable relative to a front seat portion 54 1987
4966413 Articulated relaxation chair 57 1989
5062676 Adjustable chair 39 1990
* 4993164 Measuring device 45 1990
5240308 Ergonomic adjustable chair and method 47 1991
5112108 Seating furniture 22 1991
5354120 Reclining chair 80 1992
5299851 Adjustable cushion assembly for a chair 60 1993
5460427 Seat assembly and method 70 1993
5474360 Seatback recliner mechanism 30 1995
 
L&P PROPERTY MANAGEMENT COMPANY (3)
4948198 Knee-tilt chair control 18 1988
5518294 Variable apex back support 171 1994
5651584 Lumbar support structure for automotive vehicle 89 1995
 
Keiper Automobiltechnik GmbH & Co. KG (1)
4544204 Back frame for seat, particularly for power vehicle seat 46 1982
 
Herman Miller, Inc. (5)
5106157 Chair height and tilt adjustment mechanisms 50 1989
5192114 Tilt adjustment control for a chair 40 1991
6035901 Woven fabric membrane for a seating surface 190 1995
6250715 Chair 51 1999
6367876 Chair 54 2001
 
STANT MANUFACTURING INC. (2)
4913303 Liquid splash control fuel cap 49 1988
5529201 Cam-on filler neck cap 41 1994
 
TRUMOVE DESIGNS INC. (1)
5660439 Integrated seat and back and mechanisms for chairs 92 1995
 
STANT USA CORP. (2)
5110003 Torque-override cap 59 1990
5449086 Delayed actuation fuel cap 61 1993
 
STEELCASE DEVELOPMENT CORPORATION (19)
4314728 Chair control 45 1980
4390206 Synchrotilt chair control 78 1980
4720142 Variable back stop 68 1986
4776633 Integrated chair and control 121 1986
4951995 Arm height adjustment mechanism for a chair 61 1989
5249839 Split back chair 109 1991
5320410 Chair control 68 1992
5328242 Chair with back lock 38 1992
5282670 Cable actuated variable stop mechanism 34 1992
5385388 Split back chair 136 1993
5540481 Chair with zero front rise control 36 1994
5487591 Back shell with selective stiffening 84 1994
5577807 Adjustable chair actuator 110 1994
5782536 Modular chair construction and method of assembly 62 1995
5630647 Tension adjustment mechanism for chairs 84 1995
5611598 Chair having back shell with selective stiffening 60 1996
5871258 Chair with novel seat construction 194 1997
5975634 Chair including novel back construction 171 1997
6003943 Multi-function control for chair 25 1998
 
PROTONED B.V. (1)
4703974 Seat furniture 61 1985
 
Steelcase Strafor (2)
4981326 Ergonomic chair 98 1988
5915788 Multi-function control for chair 24 1997
 
AISIN SEIKI KABUSHIKI KAISHA (1)
4896918 Lumbar support regulating apparatus 28 1988
 
ITOKI CREBIO CORPORATION (1)
5582459 Chair having tiltable seat back 82 1994
 
Fritz Hansen A/S (1)
* 5340197 One-piece seat shell 16 1992
 
HAWORTH, INC. (1)
4595237 Actuating control for seat height adjustment mechanism 49 1984
 
SKW TROSTBERG AKTIENGESELLSCHAFT (1)
4309206 Process for the production of odorless prilled urea-dicyandiamide fertilizers 13 1980
 
JASON INCORPORATED (2)
4621864 Tiltable arm rest assembly and mounting and operating means therefor 48 1984
4709963 Adjustable office chair 98 1986
 
FIAT AUTO S.P.A. (1)
4968093 Adjustable backrest for the seats of vehicles, particularly cars 77 1989
 
GRAMMER SITZYSYSTEME GMBH, WERNHER-VON-BRAUN-STRASSE 6, 8450 AMBERG-I, F.R.G. (1)
4842333 Seat 41 1988
 
Etablissements Linguanotto (1)
4685730 Seat, especially work seat, with several positions 72 1985
 
PRO-CORD S.R.L., AN ITALIAN LIMITED COMPANY (1)
4915449 Chair with a pivoting seat 33 1989
 
J.G. Furniture Systems, Inc. (1)
5100201 Passive ergonomic work chair 63 1990
 
PLASTIC INDUSTRIES, INC. (1)
5107720 Device for actuating a remotely positioned latch 32 1991
 
American Seating Company (1)
4861108 Auditorium seat 40 1988
 
SHIROKI CORPORATION (1)
5302002 Hip supporting apparatus of seat 26 1991
 
SCHUKRA-GERATEBAU AG (1)
5050930 Lordosis-support backrest for a vehicle seat 112 1990
 
Provenda Marketing AG (1)
4763950 Tilting chair, especially office chair 45 1986
 
KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO (1)
5027022 Reverse rotation preventing mechanism for synchronous motors 18 1990
 
Duphin Entwicklungs-u. Beteiligungs-GmbH (1)
5564783 Chair, in particular office chair 40 1994
 
SICAM, SPA (1)
5120109 Motor vehicle seat 57 1989
 
B.V. LINIDO, A CORP. OF THE NETHERLANDS (1)
5447356 Chair for disabled persons 49 1992
 
Wilkhahn Wilkening + Hahne GmbH + Co. (1)
5366274 Synchronous adjusting device for office chairs or the like 75 1993
 
MDT CORPORATION (1)
5405188 Mechanical chair 32 1993
 
KNOLL, INC. (3)
4380352 Reclining chair 78 1980
4906045 Chair control for a pedestal chair having a knee-tilt seat 31 1989
5029940 Chair tilt and chair height control apparatus 86 1990
 
TACHI-S CO., LTD. (2)
5044693 Seat back structure of an automotive seat 56 1989
5087098 Lumbar support device 35 1990
 
CESA - COMPAGNIE EUROPEENNE DE SIEGES POUR AUTOMOBILES (1)
* 5567017 Framework element for a seat, component making use thereof, and its use especially for vehicle seat 18 1995
 
LEGGETT & PLATT, INCORPORATED (1)
4889384 Knee-action chair control 50 1988
 
Shelby Williams Industries, Inc. (1)
5039163 Reinforced flexible backrest assembly for a chair 67 1989
 
Special Health Systems Ltd. (1)
5573302 Lower back support 40 1994
 
KIMBALL INTERNATIONAL, INC. (1)
* 5308145 Reclining chair 53 1992
 
Nepsco, Inc. (1)
4502728 Portable seat and back rest 68 1982
 
LANE FURNITURE INDUSTRIES, INC. (1)
5056862 Recessed lever actuator for recliner mechanism 29 1990
 
DEPERRY, SHIELA H. (2)
5009466 Reclining chair 52 1989
5338094 Flexible reclining chair 37 1993
 
Castelli S.p.A. (1)
4585272 Chair having a back comprising a plurality of articulated segments 126 1983
 
FORD MOTOR COMPANY (1)
4638679 Adjusting mechanism for a Bowden cable 17 1984
 
Girsberger Holding AG (1)
4834453 Swivel chair 40 1987
 
ROHO, INC. (1)
* 5364162 Backrest assembly for a wheelchair 56 1991
 
TAKANO CO., LTD. (1)
5102196 Chair provided with a backrest 131 1990
 
Engineered Components, Inc. (1)
5277475 One piece back support for a chair 33 1992
 
FISHER DYNAMICS CORPORATION (1)
5590932 Anti-chuck seat recliner 43 1994
 
Tachikawa Spring Co., Ltd. (1)
4641884 Seat for vehicles 45 1986
 
BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY (1)
5597203 Seat with biomechanical articulation 72 1994
 
FINDLAY INDUSTRIES, INC. (1)
5217278 Mechanism for providing adjustable lumbar support in a seat 169 1991
 
J. E. Ekornes A/S (2)
4984846 Arrangement in an adjustable chair 44 1989
5472261 Arrangement in a recline chair 47 1993
 
Gispen & Staalmeubel B.V. (1)
4521053 Chair 66 1982
 
FORD GLOBAL TECHNOLOGIES, INC. (1)
5505520 Passenger seat with adjustable lumbar support 72 1994
 
L&P/YOUNG SPRING ACQUISITION COMPANY, INC., A CORP. OF DE (1)
4880271 Adjustable lumbar support 84 1988
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
D545089 Chair frame 0 2005
 
HNI TECHNOLOGIES INC. (2)
9504331 Dynamic chair back lumbar support system 0 2012
9332851 Chair with activated back flex 2 2014
 
HAWORTH, INC. (1)
8272693 Tension mechanism for a weight-responsive chair 2 2010
 
ITOKI CORPORATION (2)
* 7896439 Chair 20 2006
* 2009/0236,890 CHAIR 1 2006
 
OKAMURA CORPORATION (1)
* 2013/0207,427 CHAIR WITH ARMREST 0 2011
 
FAURECIA AUTOMOTIVE SEATING, LLC (2)
8857908 Controllable comfort shell for vehicle seat 3 2010
9358911 Controllable comfort shell for vehicle seat 0 2014
 
Herman Miller, Inc. (2)
8449037 Seating structure with a contoured flexible backrest 3 2011
9301615 Seating structure with a contoured flexible backrest 0 2014
 
Steelcasel Inc. (1)
* 9027997 Chair assembly 1 2013
 
ALLSTEEL INC. (1)
D731833 Chair 5 2014
 
STEELCASE INC. (10)
7841665 Height adjustable armrest 48 2007
* 2008/0296,955 HEIGHT ADJUSTABLE ARMREST 5 2007
* 9027998 Chair assembly 0 2013
* 9027999 Control assembly for chair 0 2013
* 9022476 Control assembly for chair 1 2013
* 9010859 Chair assembly 3 2013
* 2014/0077,555 Chair Assembly 1 2013
* 2014/0077,556 Control Assembly for Chair 0 2013
* 2014/0077,557 Control Assembly for Chair 0 2013
* 2014/0077,549 Chair Assembly 0 2013
* Cited By Examiner

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11.5 Year Payment $7400.00 $3700.00 $1850.00 Nov 9, 2017
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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