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 |
| 7938487 | Tilting fitting for a chair A tilting fitting device enables a chair seat to be tiltable forwards and backwards against spring force of tilt-resisting springs, the tilting fitting having an upper part that is fastenable to the chair seat and a lower part that is fastenable to a chair base and ... | 05/10/2011 |
| 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 |
| 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 |
| 7234774 | Seating unit with novel flexible supports A seating unit includes a seat, a back, a base, and a motion control having a plurality of flexible supports for operably supporting the seat and back on the base. The flexible supports are movable in a generally fore-to-aft direction but stiff in a generally vertic... | 06/26/2007 |
| 7134722 | Chair A simple arrangement of a chair allows transformation of the shape of a backrest. The chair has a transformable backrest and a backrest receiving member that supports a bottom end portion of the backrest in a slidable manner toward a certain direction and an operati... | 11/14/2006 |
| 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 |
| 6935689 | Chair The chair comprises an axis X1 that extends right and left and that connects a seat 6 and a supporting body 3 arranged under the seat 6 in a rotatable manner at a front end portion of the seat frame 4, an axis X2 that connec... | 08/30/2005 |
| 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 |
| 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 |
| 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 |
| 6467844 | System tightening the seat supports of chairs Clamping arrangement for seat carriers of chairs, in particular office swivel chairs, whereby the seat carrier is provided with at least two parts which can be pivoted in relation to each other about a common axis and to each of which a lamellar stack is ... | 10/22/2002 |
| 6419320 | Base manipulation device for office chair A base manipulation device for an office chair includes a bottom plate having locking slots and pivoted with a chair base which has a rotation plate provided with a pivot plate and a drive plate. An operation bar is pivoted on the pivot plate and has a di... | 07/16/2002 |
| 6283548 | Office chair with a guidable seat back An office chair is provided. The office chair includes a seat back that can follow the motions of the upper body of a person seated in the seat. The seat back of the office chair includes a restoring spring in the form of a mechanical screw pressure sprin... | 09/04/2001 |
| 6276755 | Swivel arrangement for a chair seat A swivel arrangement is provided for a chair having a backrest, a chair seat, a chassis, and a base. The chassis includes a swivel seat mounted to an underside of the chair seat, a first connecting seat, a second connecting seat, a spring seat, a control ... | 08/21/2001 |
| 6234573 | Chair, in particular office chair A chair is provided in which the position and movement of the backrest, which is pivotally carried on a backrest carrier, is effected by movement of the seat top, which, in turn, is subjected to the weight of the seat user. The amount of the user's weight... | 05/22/2001 |
| 6213552 | Multi-position chair control mechanism for synchronously adjusting the seat and backrest of a chair A seat adjustment mechanism for a chair includes a first handle which controls the height of the seat above a surface supporting the chair. A second handle allows the user to selectively lock the seat at a user selected angle relative to the supporting su... | 04/10/2001 |
| 6010189 | Synchronized chair seat and backrest tilt control mechanism A chair control mechanism is provided for use on a chair having a separate seat 14 and backrest 16 that move with respect to a base 12 of the chair. The mechanism 22 includes a housing 26 supported on the base, and brackets 28, 30 secured to the seat and ... | 01/04/2000 |
| 6000755 | Swivel chair An office swivel chair is provided comprising a foot with a center column extending upwards therefrom, wherein the center column may be variable in length and/or spring mounted, a seat carrier is secured at the upper end of the center column, a seat top p... | 12/14/1999 |
| 6000756 | Synchronized chair seat and backrest tilt control mechanism A chair control mechanism is provided for use on a chair having a separate seat 14 and backrest 16 that move with respect to a base 12 of the chair. The mechanism 22 includes a housing 26 supported on the base, and brackets 28, 30 secured to the seat and ... | 12/14/1999 |
| 5931531 | Chair having adjustable synchronous tilting A chair having adjustable synchronous tilting, where a seat (7) pivotable about a seat pivot axis (5) and a back-rest support (11) pivotable about a back-rest pivot axis (9) are coupled by a coupling link (15) for simultaneous inclination changes, the syn... | 08/03/1999 |
| 5772282 | Tilt control mechanism for a chair An apparatus for controlling the tilt range of a chair and the resistance to tilting of the chair including a torsion spring mounted to an axle, a tilt rate adjustment mechanism, a forward tilt limiter and a rearward tilt limiter. The tilt rate adjustment... | 06/30/1998 |
| 5160184 | Controller for seating and the like A controller is provided for seating, and the like, such as chairs of the type that have a stationary base or support, and a back which tilts about a generally horizontal axis with respect to the support. The controller includes an adjustable tension devi... | 11/03/1992 |
| 5150948 | Reclining chair A chair which is provided with a seat having an adjustable inclination comprises a seat carrier, which is pivoted by a first pivot to a link arrangement which carry the seat, a back rest, which is carried by a back rest carrier, which is pivoted to the li... | 09/29/1992 |
| 5114211 | Chair, in particular an office chair A chair, in particular an office chair, has a vertical column (12) rising from a pedestal (10). From the top end of the column a bracket (16) projects forwards. A seat (20) is connected to the bracket and is supported in the rear region by a generally U-s... | 05/19/1992 |
| 5052753 | Adjustable sitting device An adjustable sitting device has a mechanism to alter the mutual angle between the seat and the back rest, the seat and/or back rest being turnable about a first imaginary axis which is essentially coincident with a second imaginary pivoting axis of the h... | 10/01/1991 |
| 5026117 | Controller for seating and the like A controller is provided for seating, and the like, such as chairs of the type that have a stationary base or support, and a back which tilts about a generally horizontal axis with respect to the support. The controller includes an adjustable tension devi... | 06/25/1991 |
| 5024484 | Adjustable sitting device An adjustable sitting device, e.g. a chair with the mutual angle between the seat and the back rest being adjustable, if desired, with simultaneous adjustment of the level of the seat and the back rest, said seat and/or back rest being turnable about an a... | 06/18/1991 |
| 4966411 | Chair provided with a backrest A chair with a backrest is arranged so that the seat can be shifted forwardly to a rest position upon a rearward inclination of the backrest. The front end of the seat is supported pivotably on a support base, and the seat is movable forwardly and rearwar... | 10/30/1990 |
| 4938531 | Adjustment mechanism for chairs This device relates to an adjustment mechanism for adjusting the angular positions of a seat and a back rest of a chair. The mechanism comprises a fixed horizontal beam having a seat support member pivotally connected thereto by a transverse pivot adjacen... | 07/03/1990 |
| 4913492 | Recliner for vehicle seat This invention provides a vehicle seat with improved reclining adjustments for operators. A recliner assembly (13) includes a recliner (34) supported between a rear tilt bracket (25) depending from the backrest assembly (11) and a front tilt bracket (29) ... | 04/03/1990 |
| 4877291 | Reclining chair An improved reclining chair including a base frame having spaced arm rests, a back frame pivotally mounted on the arm rest, a seat frame hingedly connected to the back frame at a point below the pivot connection of the back frame to the arm rest and havin... | 10/31/1989 |
| 4865384 | Chair with seat biasing means A chair, in particular an office chair, comprising a vertical base starting out from a bottom part, a seat plate which is connected pivotally about a first horizontal transverse axis to a forwardly directed support arm of the base, and a bar receiving a b... | 09/12/1989 |
| 4848837 | Chair having a pelvis-hip support adjustable relative to a front seat portion A chair has a spring rocker which is articulatad to a seat support at a front edge of the seat. The rocker is connected to a pelvis-hip support by a horizontal pivot device. An entrance section of the pelvis-hip support is longer than an exit section ther... | 07/18/1989 |
| 4834453 | Swivel chair A swivel chair has a leg with a support at the upper end of its upright column and two shells which are articulately connected to each other and at least one of which is articulately connected directly to the support. The one shell carries a cushion and f... | 05/30/1989 |
| 4799732 | Chair seat inclining and moving device The seat of a chair comprises stepped engaging portions provided at the rear portion of the seat plate and stepped engaging portions provided at the lower portion of the reclining back seat are fitted with stepped engaging portions provided at the front p... | 01/24/1989 |
| 4779925 | Height-adjustable swivel chair equipped with gas-pressure spring, especially office chair or office armchair In the swivel chair, a seat frame and a backrest frame are joined by articulation and movable with a rocking motion synchronously against spring force, and the tilt of seat and backrest can be locked in several positions. The entire mechanical system for ... | 10/25/1988 |
| 4718725 | Support-and adjusting device for seat and backrest on a work chair Support and adjusting mechanism for the seat and backrest of a work chair having a pedestal with feet and a vertical support column comprises a support part fixed on the upper end of the support column and having laterally spaced, parallel upwardly extend... | 01/12/1988 |
| 4712835 | Chair with seal spring mechanism A chair, especially for children and teenagers, comprising a seat, a plurality of substantially horizontal legs provided with casters, a supporting frame and a backrest attached to the frame. The supporting frame is disposed close to the floor at a distan... | 12/15/1987 |
| 4709962 | Work chair with a tilting mechanism for seat squab and backrest The work chair has a seat squab and a backrest which both pivot on a seat carrier in the same direction interdependently. A load element is fitted to the seat carrier which is adjustable over its linear extension by means of a locking mechanism, whereby t... | 12/01/1987 |
| 4641886 | Gas spring arrangement, especially for a backrest support for office chairs In a gas spring arrangement, comprising a gas spring disposed between two elements which are pivotable in relation to one another around a pivot axis, which damps the pivot movement, and a mechanical arrangement with an activating lever for the releasable... | 02/10/1987 |
