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Class 297/300.8 - Manually


Subclass of Class 297 - Chairs and seats
Definition: Adjustable limiting device wherein the adjustable means
No. of patents: 84
Last issue date: 08/12/2008


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NumberTitleIssue Date
7410216Tension adjustment mechanism for a chair
A tilt control mechanism for an office chair includes a spring assembly therein which controls the tilt tension on the back assembly. This tilt control mechanism includes a tension adjustment assembly having a radial adjustment arm which supports the legs of a pair ...
08/12/2008
7367623Ergonomic chair
An ergonomic chair having a cooperatively adjustable knee support and seat is herein disclosed. The knee support and seat may be adjusted to position a user of the chair in a physiologic attitude that approaches the neutral position. ...
05/06/2008
7325873Seating unit
A seating unit comprising a base configured to be positioned on a floor, a torsional energy unit connected to the base, a back connected to the torsional energy unit and a seat rotatably connected to the torsional energy unit. The torsional energy unit biases the ba...
02/05/2008
7303233Height 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
7293832Chair 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
7281764Tension 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
7249801Cushioning 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
7234775Dynamically balanced seat assembly having independently and arcuately movable seat and backrest and method
A seat assembly (21) including a seat (22), a backrest (23) and a mounting assembly (24) mounting the seat (22) in a near horizontal orientation for movement along an upwardly concaved arcuate seat path having a center of curvature...
06/26/2007
7080884Chair 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
7066538Chair 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
7036881Chair seat tilt mechanism
The seat plate of a chair control is pivotably mounted to the main frame so as to be tiltable forwardly and rearwardly. An arm extending from the seat plate has a slot which receives a pin of the main frame to limit forward and rearward tilting of the seat plate. Th...
05/02/2006
7036882Chair, in particular office chair
A chair, in particular office chair, comprises a seat support with a front seat support part and a rear seat support part which is pivotable in relation thereto about a horizontal pivoting axis. An adjustable-length energy storing device, which is articulated to the...
05/02/2006
7014262Support 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
7004543Chair
A tiltable chair including a housing, a back support pivotally attached to the housing about a first horizontal axis and a seat support pivotally attached to the housing about a second horizontal axis. A leaf spring includes a first end engaging the housing and a se...
02/28/2006
6932430Combined 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
6921134Apparatus 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
6916067Angle 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
6905445Resistance adjuster for adjusting a resistance-providing member on a stationary bicycle
A resistance adjuster for adjusting a resistance-providing member on a stationary bicycle includes a tubular housing, an elastic buffering member disposed in the housing and having upper and lower ends, an upper connecting member connected to the upper end of the bu...
06/14/2005
6880886Combined 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
6874853Chair
This object is attained in a chair comprising a pedestal; a seat support supported thereon via a chair column, said seat support comprising a front and a rear seat support element being connected with one another via a pivot axis extending substantially horizontally...
04/05/2005
6871909Locking 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
6817668Seating unit with variable back stop and seat bias
A seating unit includes a seating unit having a base, a seat and a back operably pivoted to the base for synchronous movement including recline of the back and forward movement of the seat, an adjustable variable back stop adjustably engaging the seat for adjustably...
11/16/2004
6712428Reclining device for chairs and chair with said reclining device
It is provided for a reclining device for chairs and the chair with said reclining device, comprising an elastic element with linear strain (8) having a first end (8a) abutting against the primary body (2) of a chair, and a half-shell ele...
03/30/2004
6669298Seat assembly including resilent friction member
A damper (20) for damping motion between two relatively moveable members, such as pivotal motion between components in office chairs (10). The damper (20) includes a outer member (22) having an internal recess (23) with a inner surface (24) and a crosswis...
12/30/2003
6616231Multi-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
6588843Chair control
A chair control providing both articulating tilt motion and dual-ratio, adjustable, synchronized tilt motion. In a first aspect, the control can be configured as either an articulating tilt control or a synchronized tilt control. In a second aspect, the a...
07/08/2003
6488336Backrest 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
6467845Chair with a locking unit
A locking unit includes a frame to permit extension of a bolt. An upper portion of a bracket is pivoted to left and right side walls of the frame. A linking member has a rear part connected to the bracket, and a front part formed with an arcuate slot thro...
10/22/2002
6450577Multifunction 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
6419320Base 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
6367876Chair
A tiltable chair including a housing, a back support pivotally attached to the housing about a first horizontal axis and a seat support pivotally attached to the housing about a second horizontal axis. A leaf spring includes a first end engaging the housi...
04/09/2002
6286900Tilt 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...
09/11/2001
6283549Office 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
6273506Chair 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
6250715Chair
A tiltable chair including a housing, a back support pivotally attached to the housing about a first horizontal axis and a seat support pivotally attached to the housing about a second horizontal axis. A leaf spring includes a first end engaging the housi...
06/26/2001
6238000Mechanism for chair
An office chair has a seat (1) mounted on a base (2) so that its inclination can be adjusted with a mechanism (4). The mechanism has a spring (28) mounted in compression between the seat and base, and a manual control (20) acts to adjust the extent of com...
05/29/2001
6174031Actuator handle for an office chair
A chair tilt control mechanism includes an actuator handle for locking and unlocking the tilt control mechanism. The actuator handle is a self-contained assembly which is readily mountable to the chair, and includes a hollow housing and a rotatable shaft ...
01/16/2001
6010189Synchronized 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
6000756Synchronized 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
5979984Synchrotilt chair with forwardly movable seat
A chair is provided having a base assembly with a particularly shaped housing and rigid upright side arms, a back frame pivoted to the base assembly for movement between upright and reclined positions, and a seat slidably supported on the base assembly an...
11/09/1999
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