Patent ID: 7243938
Filing Date: 2007-07-17
Classification: A61G,B62B

Abstract:
1. An assistive mobility device comprising: a chair frame for supporting an occupant comprising a plurality of rigid members joined together so as to define said chair frame; a push-bar handle for providing a motive force to said assistive mobility device through the aid of an assistant, said push-bar handle secured across a rear upper portion of said chair frame; a substantially horizontal seat attached to said chair frame for supporting an occupant; a substantially vertical back attached to said chair frame for resting said occupant's back; a plurality of wheels; a chassis for supporting said chair frame and said plurality of wheels, said chassis comprising a plurality of rigid members joined together so as to define said chassis, said plurality of wheels arranged on said chassis to distribute weight substantially evenly over a surface; a locking assembly comprising a rotatable locking member with surface indentations and affixed to one of said plurality of wheels, a stationary locking member with surface indentations that mate with said rotatable locking member, a polyhedral rod connected to said stationary locking member, an upper and lower guide means affixed to said chair frame and containing said polyhedral rod that permit said polyhedral rod to move only slidably and longitudinally such that said stationary locking member may engage and disengage from said rotatable locking member, a spring means between said upper and lower guide means connected to said polyhedral rod and urging said stationary locking member to engage with said rotatable locking member, an actuator handle connected pivotably to the rear upper portion of said chair frame and at a predetermined distance from said push-bar handle such that said assistant may squeeze said actuator handle while holding said push-bar handle connected to said chair frame, and a flexible locking assembly cable means connecting said polyhedral rod to said actuator handle to pull said polyhedral rod when said actuator handle is squeezed to disengage said stationary locking member from said rotatable locking member; a braking assembly comprising a braking means at one of said plurality of wheels and a flexible braking assembly cable means to connect said braking means to said actuator handle such that said braking means is biased to a clamped state, whereby said braking means is released when said actuator handle is squeezed and clamped automatically when said actuator handle is released.