초록 ▼

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 compression springs disposed between a seat support as

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 compression springs disposed between a seat support assembly and a base member to provide added resistance to rearward tilt, a link to limit rotation of the seat support assembly within predetermined limits and a release mechanism movable between a lock position, wherein rearward tilt is prohibited and a release position, wherein rearward tilt is permitted.

대표청구항 ▼

A support mechanism for a tiltable chair including a seat support assembly adapted to be mounted to the underside of a chair seat, said support assembly having a front end and a rear end and including a pair of side plates; a tube having a central axis supported between and towards the front ends of

A support mechanism for a tiltable chair including a seat support assembly adapted to be mounted to the underside of a chair seat, said support assembly having a front end and a rear end and including a pair of side plates; a tube having a central axis supported between and towards the front ends of said side plates such that said tube is relatively rotatable within said side plates; a base member having a rear end which is adapted to be supported by a chair post and a front end which is rigidly secured about said tube; a rear tilt torque mechanism associated with said seat support assembly operative to resist rear tilt of said seat support assembly about said tube; a rear tilt torque adjustment means connected to said rear tilt torque mechanism to selectively vary the resistance to rear tilt; at least one compression spring disposed between said seat support assembly and said base member operative to provide added resistance to rear tilt of said seat support assembly about said tube; a connecting link having one end pivotally connected to said support assembly and another end slidably connected to said base member, said connecting link adapted to limit rotation of said support assembly about said tube within predetermined limits; a release mechanism associated with said connecting link operative to lock said link in a first position such that rear tilt of said support assembly is prohibited and to selectively release said link to assume a second position such that rear tilt of said support assembly about said tube is permitted within predetermined limits.