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| Number | Title | Issue Date |
| 7866750 | Permanent contact mechanism A permanent-contact mechanism for an office chair or the like is formed as a comparatively flat permanent-contact mechanism with a seat frame, which can be positioned on a chair upright, with a backrest support, which is arranged on the seat frame such that it can b... | 01/11/2011 |
| 7726740 | Backrest-tilting device A back rest tilting device in a reclining chair formed of fewer parts. A force promoting unit energizes a back rest in an upright direction. A rotating force promoting unit with rubber torsion springs includes a laterally extending pivot shaft rotated integrally wit... | 06/01/2010 |
| 7500718 | Tilt tension mechanism for chair A tilt tension mechanism for a chair comprises a gear drive mechanism for driving a torsion bar having a drive shaft, a face gear and an actuator shaft with a pinion gear section. The pinion gear section and face gear have cooperating spiral threads which provide fo... | 03/10/2009 |
| 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 |
| 7273253 | Chair ride mechanism with tension assembly A task chair, including a backrest assembly and a seat assembly pivotally coupled both to one another and to side portions of a fixed yoke member for synchronized movement, in which the seat of the seat assembly moves upwardly and forwardly concurrently with recline... | 09/25/2007 |
| 7192088 | Vehicle seat assembly A stowable seat assembly is provided for use with a vehicle having a floor and a recess formed therein. The assembly includes a seat and a pivot tube adapted to be secured to the vehicle floor, with the seat being operatively pivotal about the pivot tube between a f... | 03/20/2007 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 6273506 | Chair with an adjustable seat A chair includes a base, a backrest supported by the base, a seat support by the base, and a seat slidably mounted to the seat support. A seat adjustment device can be employed to allow for forward and rearward adjustment of the seat relative to the backr... | 08/14/2001 |
| 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 |
| 6086153 | Chair with reclineable back and adjustable energy mechanism A chair is provided having a base assembly including a base frame, a back frame pivoted to the base frame for movement between upright and reclined positions, and a seat slidably supported on the base frame and pivoted to the back frame so that the seat m... | 07/11/2000 |
| 6053574 | Device for adjusting the tilting resistance of a chair seat For automatically adjusting the tilting resistance of a chair seat (6), which is tiltably attached on a base column (1) via a horizontal shaft provided across the chair, and where tilting resistance and springing are determined by two spring elements (13,... | 04/25/2000 |
| 6015187 | 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... | 01/18/2000 |
| 6003943 | Multi-function control for chair A chair includes a seat, a base including a housing, and a reclineable back pivoted to the housing. The chair further includes a pneumatic system having a valve actuateable to adjust a height of the seat with respect to the base, a cam for blocking the de... | 12/21/1999 |
| 5964503 | Chair A chair having concurrently operative function between a seat and a backrest is disclosed which has a simple structure and is capable of exhibiting smooth motion and which has enhanced degree of freedom in its design because of the simple structure. The c... | 10/12/1999 |
| 5915788 | Multi-function control for chair A chair includes a seat, a base including a housing, and a reclineable back pivoted to the housing. The chair further includes a pneumatic system having a valve actuateable to adjust a height of the seat with respect to the base, a cam for blocking the de... | 06/29/1999 |
| 5909924 | 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... | 06/08/1999 |
| 5765914 | Chair with a tilt control mechanism A synchronous tilt control mechanism is provided for a chair. The chair includes a base, a seat, a back, a torsion spring, a first slide member and a second slide member. The base further includes a tilt control housing mounted thereon. The back includes ... | 06/16/1998 |
| 5725277 | Synchrotilt chair A chair includes a base, a seat, a back and a linkage operably connecting the seat and the back to the base in a manner providing a synchrotilt movement of the back and the seat. The back is pivoted to the base at a first actual pivot for movement about a... | 03/10/1998 |
| 5630647 | Tension adjustment mechanism for chairs A chair construction and method for building a chair having selected features are provided. The construction includes a plurality of interchangeable different components including different base assemblies, back assemblies, seats, arms, and chair controls... | 05/20/1997 |
| 5611598 | Chair having back shell with selective stiffening A chair includes a base, a seat, a back pivoted to the base and an inner shell construction connecting a cushion assembly to the back. The shell includes a semi-rigid, flexible sheet having a back portion shaped to support a back area of an adult user. Th... | 03/18/1997 |
| 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 |
| 5567012 | Chair control A chair includes a base, a seat, a back pivoted to the base and an inner shell construction connecting a cushion assembly to the back. A chair control includes a control housing, a pair of coil springs and an adjustment subassembly. The coil springs inclu... | 10/22/1996 |
| 5487591 | Back shell with selective stiffening A chair includes a base, a seat, a back pivoted to the base and an inner shell construction connecting a cushion assembly to the back. The shell includes a semi-rigid, flexible sheet having a back portion shaped to support a back area of an adult user. Th... | 01/30/1996 |
| 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 |
| 5378039 | Torsion spring and adjustable mounting for chair A straight type torsion spring is clamped together at two ends, the ends being rotatable in relation to each other against the torsion spring force. The torsion spring includes at least four identical torsion rods abutting laterally along their entire ext... | 01/03/1995 |
| 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 |
| 5333368 | Chair control with forward tilt An office-type chair having a base, a cantilevered pedestal assembly projecting upwardly from substantially a center of the base, and a seat/back arrangement connected to an upper end of the pedestal assembly. The seat/back arrangement includes a generall... | 08/02/1994 |
| 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 |
| 5121968 | Chair, particularly office chair A chair, particularly an office chair, comprises a chair column, a seat lower frame supported on the chair colunm in a height-adjustable manner and rotatable relative to a vertical axis, a seat support supported on the seat lower frame turnably about a ho... | 06/16/1992 |
| 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 |
| 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 |
| 5050931 | Controlled deflection front lip for seating A controlled deflection front lip arrangement is provided for seating, such as chairs and the like of the type having a base, and a seat with a rearward portion positioned to contact a buttock area of an adult user, and a forward portion positioned to con... | 09/24/1991 |
| 5029940 | Chair tilt and chair height control apparatus A tilt control mechanism that is mounted to the underside of a chair bottom, and permits the user or sitter to selectively control the chair height, as well as the degree of chair tilt. A tension adjustment mechanism is provided to permit the user to chan... | 07/09/1991 |
| 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 |
