Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7344195 | Dampener for a vehicle seat recliner A recliner assembly for a vehicle seat having a seat back movably mounted relative to a seat bottom includes first and second frame members. The first frame member supports the seat back. The second frame member supports the seat bottom. The first frame member is pi... | 03/18/2008 |
| 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 |
| 7198328 | Locking device for an office chair structure with an articulation permitting the movement of the seat and the seat back and related structures of the chair A locking device in an office chair structure of the type with articulation permitting the movement of the adjustable seat and seat back, with a mobile base from which a column rises, which is adjustable in height, and which supports a seat plane and a hinged seat b... | 04/03/2007 |
| 7172539 | Abdominal exercising support apparatus An exercise apparatus for use in performing abdominal exercises. The apparatus includes a back support member having a first side for supporting a back of a user and a headrest having a first side for resting a head of a user thereagainst. A device for supporting a ... | 02/06/2007 |
| 7159943 | Adjustable office arm chair structure with articulation for the synchronous movement of the seat and the backrest A structure for an office chair with articulation by synchronized movement of the seat and the backrest of the adjustable type includes a swivel type movable base with a height adjustable column supporting a seat surface and a reciprocally hinged backrest. The seat ... | 01/09/2007 |
| 6957864 | Chair with a stopping device A chair includes an upper frame disposed above and pivoted to a lower frame. A stopping device includes a slide mounted slidably on the upper frame, and a stopping member. The slide is slidable between a first position, where the stopping member is offset from a rea... | 10/25/2005 |
| 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 |
| 6896327 | Flexible back mechanism for stackable chairs A stackable chair includes a seat assembly and flexible back support having a seat spring system attached therebetween. The seat assembly includes seat sides having spaced apart rear portions. The back support includes lower ends curved forwardly and disposed in reg... | 05/24/2005 |
| 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 |
| 6820934 | Chair having flexible back support A chair comprises a seat support assembly including a seat support, the seat support assembly being adapted to stand on a surface so as to provide the seat support at a suitable height for a person to sit on, and a back support assembly, including a back frame membe... | 11/23/2004 |
| 6779847 | Multi-task mid-pivot chair control mechanism A chair control mechanism for positioning between the seat and seat support of a chair. The chair control mechanism includes a base section for mounting to a seat support such as an adjustable height cylinder, and a seat mounting section pivotally interconnected wit... | 08/24/2004 |
| 6598936 | Multi-task mid-pivot chair control mechanism A chair control mechanism for positioning between the seat and seat support of a chair. The chair control mechanism includes a base section for mounting to a seat support such as an adjustable height cylinder, and a seat mounting section pivotably interco... | 07/29/2003 |
| 6533352 | Chair with reclining back rest A chair having a seat and a back rest. The back rest is attached to the seat via a back rest support element. The flat spring can be made from a non-metallic material, such as from fiberglass. The back rest support element comprises a flat spring disposed... | 03/18/2003 |
| 6422649 | Chair A chair has a seat and a backrest which are independently pivotable within limits at extremities. The seat is biased upwardly at the front and the backrest is biased forwardly. The seat and the backrest have a common pivot joint, under the center of gravi... | 07/23/2002 |
| 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 |
| 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 |
| 6135559 | Seat back reclining mechanism adaptable to chairs with stationary or movable seats A seat back reclining mechanism for use in recliner and non-reclining chairs for selective movement of the seat back portion relative to and independently of the seat portion between a sitting position of the seat back portion and a reclined position of t... | 10/24/2000 |
| 6039397 | Tilt back chair control A tilt back chair provides for selective independent and concurrent movement of a chair back with respect to a chair seat. The seat is mounted to a spring biased bracket for pivotal movement about a seat tilt axis. The back is connected to a pair of pivot... | 03/21/2000 |
| 5725276 | Tilt back chair and control A tilt back chair provides for selective independent and concurrent movement of a chair back with respect to a chair seat. The seat is mounted to a spring biased bracket for pivotal movement about a seat tilt axis. The back is connected to a pair of pivot... | 03/10/1998 |
| 5704688 | Chair A chair has a base, a generally horizontal seat supported on the base, and a generally vertical back supported on the base behind the seat and provided at a predetermined spacing above the seat with a horizontally extending flex joint having formations fo... | 01/06/1998 |
| 5580127 | Chair with tilting backrest In a chair having a backrest which can be reclined backwardly against the action of spring means, the latter comprises a leaf spring having its central portion operatively connected to the base structure of the chair and its ends connected to two side arm... | 12/03/1996 |
| 5501507 | Seat with spring-loaded lumbar support The chair has a lumbar support area which moves to follow the fore and aft movements of a person in the chair. The seat back includes two portions, namely an upper portion which is generally fixed in position relative to the seat assembly at any given poi... | 03/26/1996 |
| 5452937 | Plate for connecting the seat, back and legs, especially for chairs A chair assembly consists of a seat, a back, one or more leg members and a mounting plate. The seat, back and leg members are removably mounted to the mounting plate, for allowing such components to be removed and replaced as desired. The back includes a ... | 09/26/1995 |
| 5100201 | Passive ergonomic work chair A personal office or work chair is provided which includes an open frame construction wherein a seat portion of the chair includes a pair of front springs mounted on either side of the frame, each spring located between frame members extending rearwardly ... | 03/31/1992 |
| 4938532 | Seating apparatus Seating apparatus comprising a seat support carrying a seat, a back element pivoted to said seat support which can articulate between forward and rearward positions in relation thereto, and torsion bar means extending between the back element and the seat... | 07/03/1990 |
| 4830430 | Split-back chair, particularly office chair To permit adjustment of back parts of the chair, spring means, preferably in form of two U-bent spring rods, couple a lower back part (19) to an upper back part (21) and the effective spring length of the springs (23) is adjustable or changeable by moving... | 05/16/1989 |
| 4703974 | Seat furniture The seat furniture is provided with a seat-plate backrest inclination-adjusting mechanism (6), a single-column supporting device (2) and a supporting foot (1). The backrest is composed of a backrest bottom part (16) and a backrest top part (14), and when ... | 11/03/1987 |
| 4408800 | Office chairs Improvements for office chairs are described which include a cam control mechanism having two operative positions under control of the occupant. In the first position the cam actuates a first pneumatic cylinder to adjust the height of the seat over a cont... | 10/11/1983 |
| 4101166 | Chair control mechanism A control mechanism for a tilt back chair includes a control body supported in a relatively stationary position by an integral vertical post member. A torsion unit is freely mounted between two flanges of the control body rearwardly of the post member and... | 07/18/1978 |
| 4084850 | Chair Optimal body weight distribution and excellent sacro-lumbar support is provided by a chair which changes configuration automatically to support the body in any sitting posture. The chair seat is mounted on a pair of laterally spaced-apart, elongated, subs... | 04/18/1978 |
| 4065176 | Chair control A chair control mechanism for supporting both the seat and back rest of a chair, including a seat frame with a control member mounted for limited pivotal movement thereon for supporting the back rest. A torsion spring resiliently urges the control member ... | 12/27/1977 |
