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| Number | Title | Issue Date |
| 8172323 | Locking device for a movable member in a chair An easily operable lock device for a movable member of a chair, the lock device being adapted such that a person sitting on the chair can select lock or unlock position by operating operation means with a load, such as the weight of the person, acting on the movable... | 05/08/2012 |
| 7347496 | Adjustable chair backrest A chair backrest adjusting mechanism includes a seat supporting frame, a backrest supporting arm, amount, a supporting arm cover, and a ball-shaped handle. The seat supporting frame is fixedly connected at a lower end to a base below a chair seat, and pivotally conn... | 03/25/2008 |
| 7303233 | Height adjustable chair with rocking function The invention provides a chair that the switching between operation and fixation of rocking may be operated with the height adjustment of the chair by one operation lever. A resilient member is interposed between a seat frame whose height is adjustable by a cylinder... | 12/04/2007 |
| 7293832 | Chair adjustable device A chair adjustable device includes a base with which a seat frame and a backrest frame are respectively and pivotably connected. A positioning mechanism is connected to the base and includes an operation handle which is able to shift a transmission frame and a posit... | 11/13/2007 |
| 7278685 | Recliner A reclining apparatus includes a base, a reclining element and a control element. The base is arranged between a seat and a post of a chair. The reclining element is connected to a backrest of the chair and pivotally installed on the base. The reclining element defi... | 10/09/2007 |
| 7249801 | Cushioning device to cushion the backrest of a chair, an armchair, an office chair or similar Cushioning device to cushion a backrest with respect to the seat of a chair or suchlike. The device comprises a first supporting element connected to the backrest, a second supporting element connected to the seat and pinned to the first supporting element, and a sp... | 07/31/2007 |
| 7066538 | Chair with tilt lock mechanism A tiltable chair is provided with a tilt lock mechanism that can be activated when the chair is at any tilt position, the tilt lock mechanism engaging and locking the chair when the chair moves into the upright, neutral position. ... | 06/27/2006 |
| 7017992 | Chair control device for a tiltable chair A chair control device for a tiltable chair wherein the chair control includes a a one-piece integral structure mainframe housing, including an integral extension for a seat locking cam means, for supporting adjustment mechanisms. The housing is affixed to the under... | 03/28/2006 |
| 7014262 | Support for tilting or synchronized chairs A support for tilting or synchronized chair is provided. The device includes a supporting frame, a mobile frame, an elastic member, a stiffness adjustment mechanism coupled with the elastic member, a locking mechanism for engaging the mobile frame with the supportin... | 03/21/2006 |
| 6932430 | Combined tension and back stop function for seating unit A seating unit includes a base, a seat, a back, and a control operably supporting the seat and the back on the base for movement between upright and recline positions. The control includes a spring providing a biasing supporting force to the back during recline, and... | 08/23/2005 |
| 6932431 | Chair having novel tilt control mechanism A chair having a chair seat and a chair back includes a means for controlling the tilt of the chair back relative to the chair seat, the tilt means comprising a control body mounted beneath the chair seat and a pivot body pivotably mounted beneath the control body. ... | 08/23/2005 |
| 6921134 | Apparatus for adjusting inclination of chair backs An apparatus for adjusting the inclination of a chair back is disposed on the chassis at the bottom of a cushion and pivotally coupled to the middle of a base at the upper end of chair legs. A control rod has its middle predetermined position pivotally coupled to th... | 07/26/2005 |
| 6916067 | Angle adjusting mechanism for chair A angle adjusting mechanism for a chair includes a support base, a seat support frame pivotally mounted on the support base, and an adjusting bar mounted between the support base and the seat support frame for adjusting an included angle between the support base and... | 07/12/2005 |
| 6880886 | Combined tension and back stop function for seating unit A seating unit includes a base, a seat, a back, and a control operably supporting the seat and the back on the base for movement between upright and recline positions. The control includes a spring providing a biasing supporting force to the back during recline, and... | 04/19/2005 |
| 6820936 | Chair An office-type chair which provides for synchronous differential tilting of the seat and back assemblies, with the seat assembly being constructed such that the front lip thereof does not significantly lift upon rearward tilting. The chair incorporates a tilt contro... | 11/23/2004 |
| 6659554 | Adjustment device of a chair backrest An adjustment device of a chair backrest includes a fixed member a movable member and a fixing spanner. The fixed member is fixed to a bottom of a seat of a chair. The movable member is pivoted to the fixed member, and a support rod of the backrest is con... | 12/09/2003 |
| 6616231 | Multi-position tilt-limiting mechanism A chair back upright tilts about a pivot axis with respect to a chair seat plate and has a protrusion on the bottom portion thereof. When the occupant of a chair reclines, the protrusion on the back upright and a stop plate make contact with each other. T... | 09/09/2003 |
| 6588845 | Chair An office-type chair which provides for synchronous differential tilting of the seat and back assemblies, with the seat assembly being constructed such that the front lip thereof does not significantly lift upon rearward tilting. The chair incorporates a ... | 07/08/2003 |
| 6488336 | Backrest adjustment device A backrest adjustment device has a hollow base seat, an oblong panel, a guide mount, a slide seat, a nut, a coiled spring, a compression spring, a positioning plate, a top panel, a screw rod, and a control rod. The positioning plate has a threaded apertur... | 12/03/2002 |
| 6450577 | Multifunction tilt control with single actuator A tilt control is provided in an office chair to operatively connect tiltable seat and back assemblies. The tilt control permits both forward and rearward tilting of the seat and back assemblies and includes a tilt lock mechanism and a single actuator for... | 09/17/2002 |
| 6406096 | Seat spring system A chair including a seat assembly having an improved seat spring system to provide a flexible spring backrest frame. A pair of ends of spaced apart backrest frame members are arranged in registry with respective ends of seat support frame members, with ea... | 06/18/2002 |
| 6394550 | Chair adjustment assembly A chair adjustment assembly has a base seat, a pneumatic mount disposed on the base seat, connection mount connected to the base seat, an L-shaped plate disposed on a bottom of the connection mount, and an adjustment device disposed on the pneumatic mount... | 05/28/2002 |
| 6378943 | Chair tilt lock mechanisms A chair seat tilt lock mechanism has a detent to latch an actuating lever in a locked and unlocked position. When the lever is moved to a locking position, a spring urges a moveable locking member toward a locking position, however, the moveable locking m... | 04/30/2002 |
| 6322144 | Seat support for revolving chairs The invention concerns a seat support for revolving chairs, in particular office revolving chairs, comprising a metal body in the shape of a pan, provided with top fixing elements for the seat lower part or seat plate, a bottom part for receiving the coni... | 11/27/2001 |
| 6283549 | Office chair with a seat tilt adjustment An office chair is provided. The office chair includes an eccentric adjustment of the tilt of the seat surface. In order to prevent against undesired tilt adjustments, it is provided to use a rotating shaft with a manipulation part and a functional part f... | 09/04/2001 |
| 6220664 | Base structure for chair seat A base structure for a chair seat includes a base mounted to an underside of the chair seat. Two lateral walls of the base include aligned vertical slots. A first pin is slidably extended through the aligned vertical slots. One of the lateral walls includ... | 04/24/2001 |
| 6193314 | Office chair with adjustable backrest and adjustable seat An office chair includes a backrest, a chair seat, and a connecting device having a first end for engaging with the backrest and a second end for securely engaging with the chair seat. The first end of the connecting device includes a compartment, an inne... | 02/27/2001 |
| 6116686 | Armchair An armchair is disclosed. The armchair has a seatback, a pair of armrests securely mounted on both sides of the seatback, a spring-like base securely and respectively engaged with the pair of armrests and a seat a side of which engages with a bottom side ... | 09/12/2000 |
| 6116688 | Chair An office-type chair which provides for synchronous differential tilting of the seat and back assemblies, with the seat assembly being constructed such that the front lip thereof does not significantly lift upon rearward tilting. The chair incorporates a ... | 09/12/2000 |
| 6102477 | Chair with tilt limiter A chair has a control mechanism configured to limit the angle of tilt of the chair back rest relative to the seat. The control mechanism includes a bracket member configured to be supported on a vertical column of a chair base. A rotational member attacha... | 08/15/2000 |
| 5997087 | Chair tilt mechanism A chair seat tilt lock comprises a slider riding along a track on the seat and an abutment extending from chair seat post. The slider is spring biased into registration with the abutment to block the chair against tilting and may also be moved away from t... | 12/07/1999 |
| 5971481 | Chair, specially an office chair An office chair that is adjustable in height and inclination includes a carrier body held on an upright standard, a swivel body arranged on a knee side of the carrier body, a seat carrier which is swivellable about a first joint position on the knee side.... | 10/26/1999 |
| 5839784 | Chair control A chair control is shown for adjusting the horizontal position of a chair armrest or a chair back. A support bar, upon which the chair armrest or back is mounted, a slidably located in a mounting bracket usually attached to the underside of the chair seat... | 11/24/1998 |
| 5833317 | Automotive seat back recliner The seat back flanges (32) mount a seat back (34) to a seat frame for reclining movement relative to the seat frame and a control mechanism controls the pivotal movement of the seat back (34). The control mechanism includes a tubular cylinder (54) and a f... | 11/10/1998 |
| 5762399 | Inclination positioning device for rocking type chairs A positioning device includes a mounting frame mounted to an underside of a chair seat. The mounting frame includes a positioning portion having a plurality of vertically spaced engaging notches. An adjusting base is mounted to the mounting frame and yet ... | 06/09/1998 |
| 5685607 | Office chair seat carrier An office chair seat carrier includes a seat platform carrier and a back rest carrier pivotally connected about parallel rotatable axes to a carrier part. A stack of lamellar disks is pivotally connected between the carrier part, seat platform carrier, an... | 11/11/1997 |
| 5658045 | Chair with adjustable seat and backrest Chair (1) with tilt mechanism for synchronous adjustment of a seat (4) and a backrest (6) which are swivel mounted on a base (8), from a normal working position in which the seat (4) assumes a horizontal position and the backrest (6) a vertical position, ... | 08/19/1997 |
| 5577807 | Adjustable chair actuator An adjustable chair includes a base, a back support, a control on the base, a seat positioned on the control and an actuator housing supported on the base. The control mounts the back for tilting movement between a fully upright position and reclined posi... | 11/26/1996 |
| 5498055 | Recliner: apparatus and method A recliner apparatus and method allows an occupant to recline with his feet elevated above his heart. The recliner has a chair structure composed of seat, back and footrest portions, that are supported by two side members of a frame structure. An adjustme... | 03/12/1996 |
| 5222783 | Chair with its backrest adjustable in its angle A chair with its backrest adjustable in its angle comprising a steering rod to keep the backrest upright or tilted in a certain pre-set angle and a control rod to push down a press button of an air pressure cylinder which functions to raise up or lower do... | 06/29/1993 |
