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US 7,597,163 B2Granted
Obstacle traversing wheelchair
AssigneeInvacare Corporation
InventorsGerold Goertzen, William A. Null, Jr.
Life of this patent
Estimating the term…
Abstract
A wheelchair suspension is provided. The wheelchair suspension includes a frame, a pivot arm, a front caster, a drive assembly, and a rear caster. The pivot arm is pivotally coupled to the frame. The front caster is coupled to the pivot arm. Movement of the drive assembly in a first direction causes the pivot arm to substantially remain in a first position. Movement of the drive assembly in a second direction urges the pivot arm away from the first position.
Claims34
A wheelchair suspension comprising:
- a frame;
- a pivot arm pivotally coupled to the frame;
- a front caster coupled to the pivot arm;
- a drive assembly mounting bracket;
- a rear caster coupled to the frame;
- and
- wherein movement of the drive assembly mounting bracket with respect to the frame in a first direction causes the pivot arm to remain in substantially a first position;
- and
- movement of the drive assembly mounting bracket with respect to the frame in a second direction urges the pivot arm away from the first position.
6 more elements
A wheelchair suspension comprising:
- a frame;
- a seat supported by the frame;
- a rear caster coupled to the frame;
- a pair of suspension assemblies disposed on opposite sides of the frame, each suspension assembly comprising:
- a pivot arm coupled to the frame;
- a front caster coupled to the pivot arm;
- a drive assembly mounting bracket;
- wherein the movement of the drive assembly mounting bracket with respect to the frame in a first direction causes the pivot arm to remain in substantially a first position;
- and
- movement of the drive assembly mounting bracket with respect to the frame in a second direction urges the pivot arm away from the first position.
7 more elements
A wheelchair suspension comprising:
- a frame;
- a pivot arm pivotally coupled to the frame;
- a front caster coupled to the pivot arm;
- a drive assembly mounting bracket;
- a rear caster coupled to the frame;
- and
- a means for coupling the pivot arm and the front caster such that movement of the drive assembly mounting bracket with respect to the frame in a first direction causes the pivot arm to remain in substantially a first position;
- and
- movement of the drive assembly mounting bracket with respect to the frame in a second direction urges the pivot arm away from the first position.
6 more elements
A wheelchair comprising:
- a frame;
- a front caster assembly comprising a pivot arm;
- a drive assembly comprising a pivot bracket;
- wherein movement of the drive assembly rivot bracket with respect to the frame in a first direction causes the rivot arm to remain in substantially a first position;
- and
- movement of the drive assembly rivot bracket with respect to the frame in a second direction urges the rivot arm away from the first position.
3 more elements
A wheelchair comprising:
- a frame;
- a pivot arm having a first pivot coupling;
- a front caster coupled to the pivot arm;
- a drive assembly having a mount, wherein the mount includes a second pivot coupling;
- a rear caster coupled to the frame;
- and
- wherein movement of the drive assembly mount in a first rivot direction causes the pivot arm to remain in substantially a first position;
- and
- movement of the drive assembly mount in a second rivot direction urges the pivot arm away from the first position.
6 more elements
A wheelchair suspension comprising:
- a frame;
- a pivot arm pivotally coupled to the frame;
- a front caster coupled to the pivot arm;
- a drive assembly mounting bracket;
- a rear caster coupled to the frame;
- and
- wherein movement of the drive assembly mounting bracket with respect to the pivot arm in a first direction causes the pivot arm to remain in substantially a first position;
- and
- movement of the drive assembly mounting bracket with respect to the pivot arm in a second direction urges the pivot arm away from the first position.
6 more elements
Dependencies are inferred from the claim text.