Wheelchair suspension
First Claim
1. A wheelchair suspension comprising:
- a frame;
a drive assembly pivot arm pivotally connected to the frame;
a drive assembly including a drive wheel, wherein the drive assembly is mounted to the drive assembly pivot arm;
a front caster pivot arm pivotally mounted to the frame and coupled to the drive assembly pivot arm;
a front caster coupled to the at least one front caster pivot arm;
a spring and shock absorbing assembly pivotally connected to the drive assembly pivot arm at a first pivotal connection and pivotally connected to the at least one front caster pivot arm at a second pivotal connection;
wherein the first and second pivotal connections are positioned such that a majority of the force applied by the spring and shock absorbing assembly is applied to the drive wheel when the suspension is on a flat, horizontal support surface.
18 Assignments
0 Petitions
Accused Products
Abstract
A wheelchair suspension includes a frame, a drive assembly pivot arm, a drive assembly, a front caster pivot arm, a front caster, and a spring and shock absorbing assembly. The drive assembly pivot arm is pivotally connected to the frame. The drive assembly includes a drive wheel and is mounted to the drive assembly pivot arm. The front caster pivot arm is pivotally mounted to the frame and coupled to the drive assembly pivot arm. The front caster is coupled to the at least one front caster pivot arm. The spring and shock absorbing assembly is pivotally connected to the drive assembly pivot arm at a first pivotal connection and pivotally connected to the front caster pivot arm at a second pivotal connection. The first and second pivotal connections are positioned such that a majority of the force applied by the spring and shock absorbing assembly is applied to the drive wheel when the suspension is on a flat, horizontal support surface.
393 Citations
32 Claims
-
1. A wheelchair suspension comprising:
-
a frame; a drive assembly pivot arm pivotally connected to the frame; a drive assembly including a drive wheel, wherein the drive assembly is mounted to the drive assembly pivot arm; a front caster pivot arm pivotally mounted to the frame and coupled to the drive assembly pivot arm; a front caster coupled to the at least one front caster pivot arm; a spring and shock absorbing assembly pivotally connected to the drive assembly pivot arm at a first pivotal connection and pivotally connected to the at least one front caster pivot arm at a second pivotal connection; wherein the first and second pivotal connections are positioned such that a majority of the force applied by the spring and shock absorbing assembly is applied to the drive wheel when the suspension is on a flat, horizontal support surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A wheelchair comprising:
-
a frame; a seat supported by the frame; a pair of suspension assemblies disposed on opposite sides of the frame, each suspension assembly comprising; a drive assembly including a drive wheel, wherein the drive assembly is mounted to the drive assembly pivot arm; a front caster pivot arm pivotally mounted to the frame and coupled to the drive assembly pivot arm; a front caster coupled to the at least one front caster pivot arm; a spring and shock absorbing assembly pivotally connected to the drive assembly pivot aim at a first pivotal connection and pivotally connected to the at least one front caster pivot arm at a second pivotal connection; wherein the first and second pivotal connections are positioned such that a majority of the force applied by the spring and shock absorbing assembly is applied to the drive wheel when the suspension is on a flat, horizontal support surface. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
-
Specification