Wheelchair suspension
First Claim
Patent Images
1. A wheelchair suspension comprising:
- a frame;
a drive assembly pivot arm pivotally connected to the frame at a first pivot axis;
a drive assembly mounted to the drive assembly pivot arm;
at least one front caster pivot arm pivotally mounted to the frame at the first pivot axis, wherein the at least one front caster pivot arm is mounted to the frame independently of the drive assembly pivot arm;
a front caster coupled to the at least one front caster pivot arm;
wherein torque applied by the drive assembly urges the front caster upward with respect to a support surface.
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Accused Products
Abstract
A suspension for a vehicle is provided. The suspension includes, for example, a frame, at least one drive assembly and at least one caster pivot arm. The at least one drive assembly and the at least one caster pivot arm are pivotally connected to the frame at a common pivot axis such that the drive assembly and the front caster pivot arm are pivotable relative to one another.
386 Citations
21 Claims
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1. A wheelchair suspension comprising:
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a frame; a drive assembly pivot arm pivotally connected to the frame at a first pivot axis; a drive assembly mounted to the drive assembly pivot arm; at least one front caster pivot arm pivotally mounted to the frame at the first pivot axis, wherein the at least one front caster pivot arm is mounted to the frame independently of the drive assembly pivot arm; a front caster coupled to the at least one front caster pivot arm; wherein torque applied by the drive assembly urges the front caster upward with respect to a support surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wheelchair comprising:
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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 pivot arm pivotally connected to the frame at a first pivot axis; a drive assembly mounted to the drive assembly pivot arm; at least one caster pivot arm pivotally mounted to the frame at the first pivot axis and coupled to the drive assembly pivot arm; a front caster coupled to the at least one front caster pivot arm; wherein torque applied to the drive assembly urges the front caster upward with respect to a support surface. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification