IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0925889
(2010-11-01)
|
| 등록번호 |
US-8272693
(2012-09-25)
|
|
발명자
/ 주소 |
- Hall, Jason
- Simpson, Stephen J.
- DeSanta, Simon
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
Flynn, Thiel, Boutell & Tanis, P.C.
|
| 인용정보 |
피인용 횟수 :
6 인용 특허 :
82 |
초록
▼
A weight-responsive chair is provided which has a weight-activated mechanism that resists rearward tilting of a chair back upright while also effecting lifting of a rear portion of the seat to counteract the rearward tilt forces. The weight-activated mechanism includes a spring package connected bet
A weight-responsive chair is provided which has a weight-activated mechanism that resists rearward tilting of a chair back upright while also effecting lifting of a rear portion of the seat to counteract the rearward tilt forces. The weight-activated mechanism includes a spring package connected between the chair frame and back upright which provides for ready mounting of same to the chair frame. Further, the rear seat portion is connected in lifting engagement with the upright but also includes independent suspension for the center of the rear seat portion to allow for independent movement and flexing thereof to improve comfort for the chair occupant.
대표청구항
▼
1. A weight-responsive chair comprising: a chair frame;a seat pivotally supported on said chair frame at a front portion by a front pivot link; and having a rear portion overlying said chair frame;a back comprising a back upright pivotally connected to said chair frame at pivot points on opposite si
1. A weight-responsive chair comprising: a chair frame;a seat pivotally supported on said chair frame at a front portion by a front pivot link; and having a rear portion overlying said chair frame;a back comprising a back upright pivotally connected to said chair frame at pivot points on opposite sides of the chair frame and having a connector link that extends forwardly from each said pivot point of said back which connects to said rear portion of the seat, a combination of the front pivot link, the chair frame, the seat and the connector links of the back upright defining a four-bar linkage wherein rearward tilting of the back upright effects lifting of the rear portion of the seat and causes the connector links to pivot upwardly and thereby lift the seat against the weight of the user; anda tension mechanism connected between the chair frame and the back upright to provide a relatively low level of resistance to tilting of the back upright, said tension mechanism including a biasing arrangement which serves to restore the seat and back to an upright position, said chair frame including sidewardly directed mounting posts adjacent said pivot points and a stationary plate, and said tension mechanism further including a sub-assembly mounted to each said mounting post, said sub-assembly comprising a rotation bearing as well as a biasing spring and a rotatable plate which are supported on said bearing, which bearing in turn mounts to said mounting posts so that said spring cooperates with said stationary and rotatable plates and said rotatable plate is rotatable about an axis of said bearing, said rotatable plate being connected to said back upright so as to rotate therewith and generate said low level of resistance to tilting. 2. The chair according to claim 1, wherein said seat includes a seat frame connected to said front pivot link and said connector links wherein said seat frame includes resiliently deflectable suspension arms which interconnect to a central portion of the rear portion of the seat, said suspension arms allowing for resilient vertical displacement of the rear portion of the seat relative to and independent of the combination such that the combination effects lifting of the rear portion of the seat while the suspension arms also permit independent resilient movement of the rear portion to improve comfort to the user. 3. The chair according to claim 1, wherein said spring is a coil spring having a first spring leg cooperating with said stationary plate and a second spring leg cooperating with said rotatable plate. 4. The chair according to claim 3, wherein said seat has a seat frame supported on said rotatable plate. 5. The chair according to claim 3, wherein said bearing is fixed to said stationary plate by a fastener. 6. The chair according to claim 3, wherein said rotatable plate is fixed to said bearing by a connector pin. 7. The chair according to claim 6, wherein said bearing includes snap connectors which snap fittingly engage an end of said connector pin. 8. The chair according to claim 7, wherein said rotatable plate is fixed to said back by fasteners engaged therebetween. 9. A weight-responsive chair comprising: a chair frame;a seat pivotally supported on said chair frame at a front portion by a front pivot link and having a rear portion overlying said chair frame;a back comprising a back upright pivotally connected to said chair frame at pivot points on opposite sides of the chair frame and having a connector link that extends forwardly from each said pivot point of said back which connects to said rear portion of the seat, a combination of the front pivot link, the chair frame, the seat and the connector links of the back upright defining a four-bar linkage wherein rearward tilting of the back upright effects lifting of the rear portion of the seat and causes the connector links to pivot upwardly and thereby lift the seat against the weight of the user; anda tension mechanism connected between the chair frame and the back upright to provide a relatively low level of resistance to tilting of the back upright, said tension mechanism including a biasing arrangement which serves to restore the seat and back to an upright position, said chair frame including sidewardly directed mounting posts adjacent said pivot points and a stationary plate, and said tension mechanism further including a sub-assembly mounted to each said mounting post, said sub-assembly comprising a rotation bearing as well as a biasing spring and a rotatable plate which are supported on said bearing, which bearing in turn mounts to said mounting posts so that said spring cooperates with said stationary and rotatable plates and said rotatable plate is rotatable about an axis of said bearing, said rotatable plate being connected to said back upright so as to rotate therewith and generate said low level of resistance to tilting, said rotatable plate being fixed to said bearing by a connector pin wherein said bearing includes snap connectors which snap fittingly engage an end of said connector pin, and said rotatable plate in turn being fixed to said back by fasteners engaged therebetween. 10. The chair according to claim 9, wherein said spring is a coil spring having a first spring leg cooperating with said stationary plate and a second spring leg cooperating with said rotatable plate. 11. The chair according to claim 10, wherein said seat has a seat frame supported on said rotatable plate. 12. The chair according to claim 11, wherein said bearing is fixed to said stationary plate by a fastener. 13. The chair according to claim 12, wherein said seat includes a seat frame connected to said front pivot link and said connector links and said seat frame includes resiliently deflectable suspension arms which interconnect to a central portion of the rear portion of the seat, said suspension arms allowing for resilient vertical displacement of the rear portion of the seat relative to and independent of the combination such that the combination effects lifting of the rear portion of the seat while the suspension arms also permit independent resilient movement of the rear portion to improve comfort to the user. 14. The chair according to claim 9, wherein said chair frame is formed from tubes having a circular profile, said tubes having free ends which project sidewardly to define said mounting posts. 15. A weight-responsive chair comprising: a chair frame;a seat having a seat frame pivotally supported on said chair frame at a front portion of said seat by a front pivot link and having a rear portion of said seat overlying said chair frame;a back comprising a back upright pivotally connected to said chair frame at a pivot point and having a connector link that extends forwardly from said pivot point of said back which connects to said rear portion of the seat, a combination of the front link, the chair frame, the seat and the connector link of the back upright defining a weight-responsive mechanism, wherein rearward tilting of the back upright effects lifting of the rear portion of the seat and causes the connector link to pivot upwardly and thereby lift the seat against the weight of the user; anda tension mechanism connected between the chair frame and the back upright to provide a relatively low level of resistance to tilting of the back upright, said tension mechanism including a biasing arrangement which serves to restore the seat and back to an upright position; andsaid seat frame further including resiliently deflectable suspension arms which interconnect to a central portion of the rear portion of the seat, said suspension arms allowing for resilient vertical displacement of the rear portion of the seat independent of the weight-responsive mechanism such that the weight-responsive mechanism effects lifting of the rear portion of the seat while the suspension arms also permit simultaneous independent resilient movement of the rear portion to allow the rear portion of the seat to lower to improve comfort to the user. 16. A weight-responsive chair comprising: a chair frame;a seat having a seat frame pivotally supported on said chair frame at a front portion of said seat by a front pivot link and having a rear portion of said seat overlying said chair frame;a back comprising a back upright pivotally connected to said chair frame at a pivot point and having a connector link that extends forwardly from said pivot point of said back which connects to said rear portion of the seat, a combination of the front link, the chair frame, the seat and the connector link of the back upright defining a four-bar linkage and a weight-responsive mechanism, wherein rearward tilting of the back upright effects lifting of the rear portion of the seat and causes the connector link to pivot upwardly and thereby lift the seat against the weight of the user; anda tension mechanism connected between the chair frame and the back upright to provide a relatively low level of resistance to tilting of the back upright, said tension mechanism including a biasing arrangement which serves to restore the seat and back to an upright position;said seat frame further including resiliently deflectable suspension arms which interconnect to a central portion of the rear portion of the seat, said suspension arms allowing for resilient vertical displacement of the rear portion of the seat independent of the weight-responsive mechanism such that the weight-responsive mechanism effects lifting of the rear portion of the seat while the suspension arms also permit independent resilient movement of the rear portion to improve comfort to the user; andwherein said seat frame has a U-shaped main section defined by rearwardly-projecting legs which terminate at free ends that pivotally connect to said tension mechanism, said seat frame further including said suspension arms which support said seat to allow for independent vertical movement of the rear portion of said seat relative to said tension mechanism. 17. The chair according to claim 16, wherein said seat comprises a horizontally-enlarged panel which mounts on said seat frame. 18. The chair according to claim 16, wherein said front pivot link is pivotally connected to said main section at a front of said seat. 19. The chair according to claim 18, wherein said front pivot link is defined by two pivot halves which capture said main section therebetween. 20. The chair according to claim 19, wherein said seat frame has a tubular front frame section extending crosswise, and said two pivot halves capture said front frame section therebetween.
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