Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 8100476 | Mobile ergonomic rotating adjustable chair with lumbar support An apparatus for sitting, including: a keystone assembly which connects various parts of the apparatus; a back that provides support for at least a person's back or shoulders; a floating lumbar support, which provides support for a person's lower back, attached to t... | 01/24/2012 |
| 7585028 | Mobile ergonomic rotating adjustable chair with lumbar support An apparatus for sitting, including: a keystone assembly which connects various parts of the apparatus; a back that provides support for at least a person's back or shoulders; a floating lumbar support, which provides support for a person's lower back, attached to t... | 09/08/2009 |
| 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 |
| 7243935 | Wheelchair having a pivot provision adjacent the knee of a user Wheelchair of which a sitting support is pivotable about a virtual or non-virtual pivot axis, extending substantially horizontally, substantially at right angles to a main driving direction of the wheelchair, wherein the upper part of the body of the user, at least ... | 07/17/2007 |
| 7140677 | Ball chair A ball chair has a seat, a backrest assembly and a ball cushion. The seat has a top face, a passage defined in the top surface of the seat, at least three legs formed on the seat and each leg and a supporting base formed on seat. The backrest assembly mounted on the... | 11/28/2006 |
| 7017872 | Height adjustable boat seat pedestal A pedestal assembly for supporting a seat including a first cylinder having an inner surface with a plurality of longitudinally-extending channels, and a second cylinder having an inner surface with a plurality of longitudinally-extending channels and an outer surfa... | 03/28/2006 |
| 6955133 | Self-deploying safety brace spring The present invention relates to an apparatus to keep a safety brace in place on a cover, lid or door and a method of using the same. One aspect of the present invention includes an economical spring constructed to fit upon a safety brace in a way as to prevent the ... | 10/18/2005 |
| 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 |
| 6896328 | Steel wire chair with springs The stylish task chair includes a base with casters, a mounting plate, a seat frame, a back frame, a pair of springs and a seat and backrest. The frames are formed of steel wire of seven-sixteenth inch diameter. The chair is formed by welding the springs to the seat... | 05/24/2005 |
| 6871909 | Locking mechanism for chair and pushbutton control therefor A first chair part may be fixed relative to a second chair part by way of a sliding member attached to the first part which slides in a body attached to the second chair part. The chair parts are fixed relative to each other when a pin associated with the body engag... | 03/29/2005 |
| 6840578 | Chair improvement structure A chair has a seat connected to a support leg in an up and down angularly displaceable manner, elastic elements for propping up a rear end of the seat to a higher position, and a mechanism for limiting position of the seat when the seat seats people; the mechanism h... | 01/11/2005 |
| 6793284 | Steel spring with dwell for chairs This invention provides a spring assembly for use in a chair tilt control mechanism. The tilt control mechanism is one that can recline and return a backrest for a chair. The spring assembly includes a cylindrical block that has first and second ends and a central b... | 09/21/2004 |
| 6773066 | Control for a seat, and a seat incorporating it A control for a seat, and a seat in combination with the control and a base, said control comprising an upper and a lower arm pivotally joined, with a flexure extending as a cantilever between them, such that a contactor contacts the flexure, and both permits and li... | 08/10/2004 |
| 6595584 | Seating for individuals and for groups of individuals with various degrees of accommodation and distraction Seating such as chairs and groups of chairs which include a base, a support for an occupant, and a control mounting the support to the base which optionally can enable a rocking motion for the support, and a control for this purpose. A plurality of seatin... | 07/22/2003 |
| 6585320 | Tilt control mechanism for a tilt back chair An improved tilt rate control mechanism for a tilt back chair has an adjustable torsion spring, a tilt rate adjustment actuator and an actuator movement mechanism. The torsion spring has an adjustment lever for adjusting the tension on the torsion spring.... | 07/01/2003 |
| 6582019 | Tilt assembly for a chair A tilt assembly comprising a tilt housing, a body support member pivotally attached to said tilt housing about a first horizontal axis and a spring mounted to said tilt housing at a second horizontal axis. The body support member is moveable between a fir... | 06/24/2003 |
| 6511128 | Chair with synchronized rocking seat and backrest Chair with synchronized rocking seat and backrest, comprising: a base support (14), a backrest supporting structure (18), connected to the base support (14) so to rock on a transversal axis (A), and a seat supporting structure (16) rocking on the base support (14) ... | 01/28/2003 |
| 6382723 | Chair with synchronized tilting seat and back Chair with a seat and back tilting in a synchronized way, includes a base structure (14), a seat support structure (18) provided to the base structure (14) about a first transverse axis (22), a back support structure (20) pivoted to the base structure (14... | 05/07/2002 |
| 6382724 | Tilting seat chair Tilting seat chair, comprising: a base structure (16) bearing a transverse tilting axis (24), a seat support structure (14), tiltably mounted about the transverse tilting axis (24), an elastic arrangement for opposing the seat tilting motion, and an adjus... | 05/07/2002 |
| 6168233 | Reclinable seating using a torsion bar A four legged or sled chair having a reclinable seat comprising a frame structure, a seat mounted within the frame structure for pivoting about a transverse torsion bar(s) axis, and elastic stops defining said seat position of maximum rearward pivoting an... | 01/02/2001 |
| 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 |
| 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 |
| 5683139 | Chair seat tilt adjustment and locking mechanism A chair tilt control mechanism for a pedestal base chair having a chair control housing mounted on the pedestal chair base and pivotally supporting a chair seat support member. A laterally movable front stop member retained within the chair control housin... | 11/04/1997 |
| 5417473 | Chair mechanism providing for an inclination range and inclination stop means A chair mechanism (1) for office chairs comprises a synchronous mechanism with integrated negative inclination. The aim is to achieve all sitting postures occurring during office work, and in particular the correction of injurious continuous sitting. The ... | 05/23/1995 |
| 5388889 | Torque control mechanism for chairs Disclosed is a knee tilt control mechanism for a pedestal type of chair. The control mechanism has a main torsion spring member secured to the control housing designed to resist pivotal movement of the chair seat about a pivot point on the housing. The ch... | 02/14/1995 |
| 5370445 | Chair control Disclosed is knee tilt chair control mechanism for a pedestal base chair having a chair control housing mounted on the pedestal chair base and pivotally supporting a chair seat support member having a cam surface formed along a portion of the bottom surfa... | 12/06/1994 |
| 5340194 | Device for adjusting seat frame and back rest of chair of swivel type chair A pedestal supported chair such as a swivel type chair in which a seat plate carrier pivoted to a base member fixed to the pedestal and having a back rest carrier is provided with adjustment means operable over range of user weights for adjusting a torsio... | 08/23/1994 |
| 5222781 | Automatically adjustable bicycle seat apparatus The automatically adjustable bicycle seat apparatus is designed for use with bicycles and comprises a clamping device that attaches a seat to a bicycle. The apparatus has spring mechanisms that permit the seat to pivot upward or downward as necessary. The... | 06/29/1993 |
| 5203853 | Locking chair tilt mechanism with torsion bar A locking chair tilt mechanism for a chair in which the backrest and rear seat portion tilt rearwardly and downwardly, and the front seat portion of the chair slides generally horizontally is disclosed. The chair is supported by a tilt mechanism mounted b... | 04/20/1993 |
| 5172955 | Bouncing infant seat reclining between upright position and recline position with distinct resilient element An infant seat having a seating surface positionable between upright and reclined orientations, the seating surface being supported by arms which are connected to torsion springs in a base, the torsion springs providing a bouncing motion to the seating su... | 12/22/1992 |
| 5056866 | Rocking chair, particularly office chair construction To provide for a compact seat adjustment mechanism, an elongated seat support (21) is secured to a floor support structure including a central post (13), to extend at an upwardly directed angle of inclination. The seat (17), attached to a seat support (29... | 10/15/1991 |
| 5033791 | Chair frame A chair frame comprises a seat part and a backrest part. A spring connecting portion, which is fixed by a pivot joint to the free end of a support arm is provided at the knee side of the seat part. To the backrest part is fixed at least one backrest strut... | 07/23/1991 |
| 5018787 | Chair seat tilt control A seat support mechanism for a tiltable chair having a rear tilt torque mechanism including interconnected torsion bars which are adjustable to vary the resilient restraining force which opposes rearward tilt of the seat when occupied, a pair of compressi... | 05/28/1991 |
| 4906045 | Chair control for a pedestal chair having a knee-tilt seat A chair control for a pedestal chair having a knee-tilt seat. An elastomeric torsion spring is offset rearwardly from the tilting axis of the seat. The seat and torsion spring are operatively connected by a cam surface and a cam follower which effectively... | 03/06/1990 |
| 4892354 | Chair seat tilt control A seat support mechanism for a tiltable chair having a rear tilt torque mechanism including interconnected torsion bars which are adjustable to vary the resilient restraining force which opposes rearward tilt of the seat when occupied, a detent mechanism ... | 01/09/1990 |
| 4877290 | Rocker mechanism with a locking facility A rocker mechanism (10) preferably intended for rotatable arm chairs, comprising an upper part (12) which is attached to a seat and which is pivotally journalled to an underpart (14) by means of a horizontal pivot shaft (24), the underpart being carried b... | 10/31/1989 |
| 4818019 | Tilt control mechanism, particularly for knee-tilt chair The seat and pedestal of a chair are joined by a knee-tilt control mechanism which includes a first support fixed to the underside of the seat adjacent the front edge thereof, and a second support fixed to the upper end of the pedestal and having a sidewa... | 04/04/1989 |
| 4796950 | Tilt mechanism, particularly for knee-tilt chair The seat and pedestal of a chair are joined by a knee-tilt mechanism which includes a first support fixed to the underside of the seat adjacent the front edge thereof, and a second support fixed to the pedestal and having a sidewardly extending support tu... | 01/10/1989 |
| 4786106 | Rocking chair construction and method of making same A rocking chair has an aluminum frame chair portion that is mounted to a base by a pair of coil springs that provide rocking action to the chair. The springs are fixedly attached to the base and each spring has an outwardly extending portion that is attac... | 11/22/1988 |
| 4784435 | Patient chair A patient-type chair is provided which is capable of a gentle rocking motion and which comprises rigid armrests for ease of ingress and egress. The chair comprises a base having a pair of substantially rigid front legs. The legs extend vertically and then... | 11/15/1988 |
