Patent ID: 7000988
Filing Date: 2006-02-21
Classification: A61G,Y10S

Abstract:
1. A chair operable between a seating position and a rise-assist position, comprising: a first frame including: a second frame including: first and second seat support members each having a first end and a second end, the first ends of the first and second seat support members being pivotally connected to the second portions of the third and fourth leg support members, respectively, intermediate the first and second ends of the second portions; a seat member extending between the first and second seat support members; first and second arm support members each having a first end and a second end, the first ends of the first and second arm support members being pivotally connected to the second portions of the third and fourth leg support members, respectively, proximate the second ends of the second portions; first and second back support members each having a first end and a second end, the first ends of the first and second back support members being pivotally connected proximate the second ends of the first and second seat support members, respectively, and intermediate the first and second back support member ends, the first and second back support members being pivotally connected to the first and second arm support members, respectively, proximate the second ends of the first and second arm support members; a back member extending between the first and second back support members; at least portions of the third and fourth leg members, arm support members, seat back members and seat support members forming first and second four-bar linkages, respectively; and at least one biasing member pivotally connected at a first end to the base and pivotally connected at a second end to at least one of the four-bar linkages, whereby the at least one biasing member operates to assist movement of the chair between the seating position and the rise-assist position.