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| Number | Title | Issue Date |
| 8113586 | Apparatus for adjusting the seat back angle An apparatus for adjusting the seat back angle, and more particularly an adjuster inclinedly disposed at a lower position of the bottom of the seat back and the rear side of the seat portion, comprising a rotating sleeve, an L-shaped connection body, a large spring,... | 02/14/2012 |
| 8100477 | Synchronizing device for an office chair The synchronizing device comprises a seat carrier for carrying a seat of said office chair, a seat arm to be connected to a chair column of said office chair, said seat carrier being pivotable in relation to said seat arm about a transverse axis, a backrest arm conn... | 01/24/2012 |
| 7815257 | Adjustment device for adjustable chairs Adjustment device for chairs, comprising a back support capable of rotating around a shaft fastened to a support base, said support for the backrest being provided with a blocking plate having a plurality of openings, an insert capable of limited movement in a defin... | 10/19/2010 |
| 7300386 | Play and training equipment The present invention refers to play and training equipment. The equipment is mainly intended to be used at playgrounds and the like places but may also find use at many other locations. An equipment according to the invention comprises at least one post or preferab... | 11/27/2007 |
| 7293833 | Chair and support mechanism unit thereof A chair is provided with a base 6 fixed at an upper end of a leg pillar 5, a back support unit 13 attached to the base 6 so as to tilt backward, a backrest 3 attached to the back support unit 13, and a spring unit 14 ... | 11/13/2007 |
| 7281764 | Tension control mechanism for chair The chair includes seat and back assemblies interconnected in a four-bar linkage. The chair further includes a tension mechanism comprising a coil spring projecting forwardly from a base and an adjustment linkage which is connected to said coil spring and to a front... | 10/16/2007 |
| 7080884 | Chair with rapidly adjustable energy storing device A working chair with adjustable backrest support pre-set tension is described, in which a swiveling backrest support is positioned on a seat part, the backrest support being prestressed against the back of the user with a manually adjustable pre-set tension of an en... | 07/25/2006 |
| 7048335 | Seating unit with crossbar seat support A seating unit includes a base having a housing and support arms extending laterally on each side of the housing. A back frame is pivoted to the support arms on each side, and a slide slidably engages the housing. A seat-supporting structure includes a crossbar pivo... | 05/23/2006 |
| 6945603 | Chair, in particular office chair A chair comprises a seat support with a front seat support part and a rear seat support part which is connected thereto via a pivoting axis. An adjustable length energy storing device serves for adjustment relative to each other of the seat support parts. The energy... | 09/20/2005 |
| 6758523 | Office chair A method of installing a spring into a chair and a chair with a preload member that prevents a user from removing an initial stress from the spring. The method includes positioning a spring guide in a first position and installing the spring into the chair in an uns... | 07/06/2004 |
| 6712428 | Reclining device for chairs and chair with said reclining device It is provided for a reclining device for chairs and the chair with said reclining device, comprising an elastic element with linear strain (8) having a first end (8a) abutting against the primary body (2) of a chair, and a half-shell ele... | 03/30/2004 |
| 6286900 | Tilt control for chair A tilt control mechanism for an office chair includes a spring arrangement which permits forward and rearward tilting of the chair while also urging the chair to a normal upright position. The spring arrangement includes front and rear springs which act i... | 09/11/2001 |
| 6174031 | Actuator handle for an office chair A chair tilt control mechanism includes an actuator handle for locking and unlocking the tilt control mechanism. The actuator handle is a self-contained assembly which is readily mountable to the chair, and includes a hollow housing and a rotatable shaft ... | 01/16/2001 |
| 5704689 | Chair having separable back The back of a chair is divided into a waist support (40) and a shoulder support (50) which are pivotally supported by respective support members (27 and 37) so that they can move freely and individually. The waist support (40) and the shoulder support (50... | 01/06/1998 |
| 5397165 | Synchronous movement adjustable seat support A seat support includes a base having a socket for receiving the end of a vertical support post. The base is not tiltable relative to the support post and extends toward the forward edge of a seat. A rearwardly downwardly inclined transverse crank slot is... | 03/14/1995 |
| 5152580 | Handle assembly for chair control mechanism A chair control mechanism of the type having a seat support member pivotally mounted on a leg mounting member, and a spring loaded adjustment mechanism for controlling the pivotal movement of one member with respect to the other. The adjustment mechanism ... | 10/06/1992 |
| 5114210 | Tilting chair with improved lumbar support A chair comprising a frame having a seat portion and a back portion is adapted to support the trunk of the body of an occupant. The frame is supported on a base. The chair includes a mechanism for allowing that part of the body portion supporting the uppe... | 05/19/1992 |
| 4756575 | Frame assembly for a chair A frame assembly for a chair includes a base member, a seat support member and a backrest member. The front end of the seat support member is pivotally mounted on the front end of the base member a seat suspension spring is provided for the purposes of ur... | 07/12/1988 |
| 4653806 | Pivotally and slidably connected cantilevered swivel seat A chair with adjustable tilt, in which the seat of the chair is mounted with its front end in a pivoting and sliding bearing on a cantilever, the rear end of which is mounted on the chair column. The seat is further connected by a pivoting bearing directl... | 03/31/1987 |
| 4650248 | Adjustable chair An adjustable chair, intended in particular for office use or similar, consists of a base equipped with a telescopic column supporting a seat, preferably padded. The seat has a rigid outer frame divided into two sections hinged together about an axis, a f... | 03/17/1987 |
| 4561693 | Back support tilt and seat and back support height control mechanism for a chair or the like Tilt control for a back support and height control for the back support and a seat for a chair or the like are provided by a gas cylinder actuator having a cam surface and pivotally mounted so that the cam surface activates the gas cylinder. A blocker pla... | 12/31/1985 |
| 4555085 | Lockable tilting apparatus for chair seats A lockable tilting apparatus for the seats of chairs and which can be used selectively either for chairs which tilt backward or for chairs which tilt forward, comprising a base plate securable to chair seat and a stationary body member adapted to be suppo... | 11/26/1985 |
| 4533177 | Reclining chair A reclining chair having a seat portion connected pivotally at its forward end includes an arm compressible with progressive resistance to support the rear of the seat portion. The compressible arm is arranged to form with the seat portion an angle which ... | 08/06/1985 |
| 4479679 | Body weight chair control A chair control in which the chair occupant's body weight is the primary source of energy in reclining the chair and returning the chair to its task position includes a back support link and a front link, each pivotally mounted to a base link. A seat supp... | 10/30/1984 |
| 4345733 | Mounting device for a chair seat A chair seat mounting device comprises a platelike support bracket that can be fastened to a chair base and a mounting plate that can be fastened to the underside of the chair seat. The plate automatically tilts forward on an axle on the bracket when the ... | 08/24/1982 |
| 4232900 | Chair control A chair control for adjustment of the rest position of a resiliently pivotable chair back, and of the degree of resiliency of the connection of the chair back to the chair frame. A spring brace is mounted on the frame beneath the seat and provides an aper... | 11/11/1980 |
| 4219233 | Chair seat back tilt-adjusting mechanism A chair seat back tilt-adjusting mechanism for use in swivel-type chairs wherein a seat back member is pivotally movable relative to a seat member. The mechanism includes a frame assembly, on which the seat back is supported, pivotally mounted on a suppor... | 08/26/1980 |
| 4200332 | Adjustable chair A lockable gas cylinder in parallel with a mechanical spring controls the adjustment of tilt in a chair seat and back. A linkage mechanism permits tilting of the chair seat about a pivot located close to the forward edge of the seat and permits tilting of... | 04/29/1980 |
| 4189179 | Low profile chair iron A low profile chair iron for controlling biased tilting between a seat or backrest and a support uses a substantially flat coil spring of increasingly smaller diameter coils between pivotably connected support bracket and a chair part bracket. Tension adj... | 02/19/1980 |
| 4170382 | Posture chair A posture chair is provided with a spring-biased back in which the spring means is located underneath, adjacent to and substantially parallel with the bottom of the seat and in which the back is adjustable both vertically and rearwardly so that, when the ... | 10/09/1979 |
| 4157203 | Articulated double back for chairs A back for a chair comprises at least one back-supporting frame member, a lower back mounted on the frame member for backward tilting movement about a first horizontal, transverse axis and yieldably restrained against such backward tilting and an upper ba... | 06/05/1979 |
| 4014086 | Safety feature for chair controls This invention discloses a novel safety feature to be used in conjunction with chair controls of tiltable chairs. The chair controls used in the present invention include a biasing means which comprises a horizontal bolt (whose shaft includes a sheath the... | 03/29/1977 |
| 4013258 | Chair control for tiltable chairs This invention discloses a novel and improved chair control for tilting chairs wherein the mechanism which controls the tilting of the chair is simplified and strengthened. It utilizes a bolt having an elongated head of V-shaped cross-section as the biasi... | 03/22/1977 |
