公开(公告)号：US4796950A

公开(公告)日：1989-01-10

申请号：US12573

申请日：1987-02-09

申请人： Walter C. Mrotz, III ,  Donald L. Cool ,  Fred C. Liebertz

发明人： Walter C. Mrotz, III ,  Donald L. Cool ,  Fred C. Liebertz

IPC分类号： A47C1/023 ,  A47C3/026 ,  A47C3/00

CPC分类号： A47C3/026

摘要： 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 tube arrangement. The first support has bearing hubs rotatably engaged with the support tube to define a horizontal tilt axis. A restoring mechanism is disposed within the second support for exerting a restoring torque about the tilt axis for urging the seat toward its horizontal position. The restoring mechanism, in the preferred embodiment, employs a sleevelike spring member of an elastomeric material disposed on the tilt axis for developing a restoring torque which generally linearly increases as the seat tilts away from the horizontal position. A second spring coacts between the supports for generating a second restoring torque which is additive with the first torque to effectively cause a torque dwell to facilitate tilting beyond an intermediate position.

公开(公告)号：US4720071A

公开(公告)日：1988-01-19

申请号：US943969

申请日：1986-12-19

申请人： Patrick C. Nelson ,  Donald L. Cool

发明人： Patrick C. Nelson ,  Donald L. Cool

IPC分类号： A47C3/18 ,  A47C3/24 ,  F16M11/24

CPC分类号： A47C3/24 ,  A47C3/18

摘要： A load-released height-adjusting mechanism coacting between the relatively rotatable spindle and pedestal of a chair. The mechanism employs a split nut threadably engaged with the pedestal. A wedge is continuously spring-urged into engagement with the nut for urging the sectors thereof radially for engagement with the threaded pedestal. The wedge is loaded downwardly by the spindle when the chair seat is occupied to cause the nut sectors to lockingly and nonrotatably engage the pedestal to permit free rotation of the spindle without effecting height adjustment. The wedge is not acted on by the spindle when the latter is in a raised position due to the chair seat being unoccupied, but the frictional treaded engagement between the pedestal and nut prevents free-wheeling of the chair while permitting manual rotation of the chair seat and nut to effect height adjustment.

摘要翻译： 在相对可旋转的主轴和椅子的基座之间共同作用的装载释放的高度调节机构。 该机构采用与基座螺纹接合的分离螺母。 楔形件被连续地弹簧推动成与螺母接合，用于沿径向推动其扇形部分以与螺纹底座接合。 当座椅被占用时，楔子被主轴向下装载，以使螺母区段锁定地和不可转动地接合基座，以允许主轴的自由旋转而不影响高度调节。 由于座椅未被占用而使座椅处于升高位置时，由于心轴不起作用，而基座和螺母之间的摩擦踏板接合可防止椅子的自由转动，同时允许椅子座椅的手动旋转 和坚果来实现高度调节。