Patent ID: 7819476
Filing Date: 2010-10-26
Classification: A61G

Abstract:
1. A support frame for use in a lift chair, comprising: (a) a base frame having longitudinally spaced transversely extending front and rear frame base rails; (b) a pair of transversely spaced longitudinally extending side frame base rails, rigidly connected to the front and rear frame base rails, remotely from ends of the front and rear frame base rails, respectively, the side frame base rails and the front and rear frame base rails being co-planar for supporting the lift chair on a surface; (c) a force balance member mounted to the rear frame base rail in at a strategic position, wherein the force balance member is U-shaped and has a transversely extending base portion, a first arm portion, which is extending from the base portion at a first angle α (d) a pair of upstanding side plate members, fixedly connected approximately midway between the front and rear frame base rails to respective ones of the side frame base rails substantially at positions of connection thereof with the first arm portion and second arm portion, respectively; and (e) a support member configured to engage with a motor and mounted to the force balance member and the rear frame base rail at the strategic position, wherein the strategic position is substantially coincident with the geometric center of the rear frame base rail.