초록 ▼

A controller is provided for seating, and the like, such as chairs of the type that have a stationary base or support, and a back which tilts about a generally horizontal axis with respect to the support. The controller includes an adjustable tension device, which readily adapts the chair for differ

A controller is provided for seating, and the like, such as chairs of the type that have a stationary base or support, and a back which tilts about a generally horizontal axis with respect to the support. The controller includes an adjustable tension device, which readily adapts the chair for different users and various applications. The adjustable tension device comprises a spring, having one end operably connected with a support, and the other end operably engaging the back at selected locations spaced apart from the tilt axis, such that rearward tilting of the chair back deflects the spring, and thereby generates a torque or back tension which resists further tilting. A shifter moves the other end of the spring between the selected back locations to vary the lever arm at which the spring acts, and thereby adjusts back tension.

대표청구항 ▼

In a chair of the type having a support and a back which tilts about an axis with respect to said support, the improvement of an adjustable, back tension controller, comprising: a spring having a first end thereof connected with said support, and a second end thereof operably engaging a portion of s

In a chair of the type having a support and a back which tilts about an axis with respect to said support, the improvement of an adjustable, back tension controller, comprising: a spring having a first end thereof connected with said support, and a second end thereof operably engaging a portion of said back at selected locations thereon which are spaced apart from said tilt axis, whereby rearward tilting of said back deflects said spring, thereby generating a torque which resiliently resists rearward tilting of said back; and a screw rotatably mounted on said support, and operably connected with said spring at a location spaced apart from said first end thereof, whereby axial rotation of said screw shifts said spring second end between the selected locations on said back, whereby said back tension controller is easily and quickly adjusted to adapt said chair for different users and various applications.