Chair with arm mounted motion control

Details Chair with arm mounted motion control Chair with arm mounted motion control

1992-01-23

1994-05-03

Brittain, James R.

Chairs and seats

Back movement resiliently opposed in operating position

Resilient support includes armrest

297288, 297297, A47C 102

Patent

active

053081420

ABSTRACT:
A chair is provided with a frame defining a curved arm support, a seat supported in the frame, and a back. An arm member is movably mounted on the arm support and operatively connected to the back so that movement of the back between upright and reclined positions is controlled by the arm member and arm support. A resilient spring is operatively connected to the back to bias the back towards an upright position. In one embodiment, the resilient spring encompasses the curved arm support and provides support for a seated user's arm. In another embodiment, an arm cap covers the resilient spring. Optionally, the arm cap slideably rides on roller bearings over the curved arm support. In another embodiment, the curved arm support and arm member are telescopingly arranged, and the resilient spring is operably placed therein. Another embodiment includes first and second springs, the second springs being disengageable to produce discrete selectable levels of bias force for biasing the back toward the upright position. In another embodiment, the resilient spring is continuously adjustable, and includes a control mechanism including opposing springs that slide on a pivotable actuator arms thus creating a variable torque arm which is adjustable to vary the resulting bias force on the chair back.

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