Patent ID: 6131679
Filing Date: 2000-10-17
Classification: A61G,Y10S,Y10T

Abstract:
A wheelchair comprising:a frame;first and second drive wheels operably mounted to the frame;at least one driven wheel operably mounted to the frame;at least one motor for powering the first and second drive wheels;a seat mounted on the frame;an anti-tip assembly having a plate operatively extending from the frame and a first biasing arm extending from and having a limited range of movement relative to the plate, said arm having a lower end with a smooth surface adapted to engage a ground surface, first and second pins extending through the arm and received in corresponding first and second non-parallel slots in the plate, whereby said pins are biased toward lower ends of said slots in an at-rest position, a biasing member having a first end secured to the plate and a second end operatively engaging the arm for opposing tipping forces imposed on the wheelchair, and a dampener secured at one end to the frame and at a second end to the plate for providing further dampening movement of the anti-tip assembly relative to said frame once said pins substantially engage upper ends of the corresponding slots.