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US 6,357,793 B1Granted
Anti-tip wheel
AssigneeSunrise Medical HHG Inc.
InventorsPaul C. Dickie, Darryl R. Pauls
Life of this patent
Estimating the term…
Abstract
A resilient anti-tip wheel suspension includes a wheel coupled to a first mounting bracket. A second mounting bracket is adapted to be rigidly mounted to a wheelchair. Upper and lower bars each have front and rear ends that are pivotally connected to the second mounting bracket and the first mounting bracket, respectively, so as to form a parallelogram configuration.
Claims17
A resilient anti-tip wheel suspension for a wheelchair comprising:
- a wheel coupled to a first mounting bracket;
- a second mounting bracket adapted to be rigidly mounted to a wheelchair;
- and
- an upper bar and a lower bar each having front and rear ends pivotally connected to the second and first mounting brackets, respectively, so as to form a parallelogram configuration, the upper and lower bars forming a four-bar system, wherein the upper bar comprises upper longitudinal bars and the lower bar comprises opposing lower longitudinal bars, the opposing upper longitudinal bars being connected together by at least one upper lateral bar, the opposing lower longitudinal bars being connected together by at least one lower lateral bar.
1 more element
A resilient anti-tip wheel suspension for a wheelchair comprising:
- a wheel coupled to a first mounting bracket;
- a second mounting bracket adapted to be rigidly mounted to a wheelchair;
- and
- an upper bar and a lower bar each having front and rear ends pivotally connected to the second and first mounting brackets, respectively, so as to form a parallelogram configuration, wherein one end of one of the bars is connected to one of the mounting brackets via a torsion elastic pivotal connection.
1 more element
A resilient anti-tip wheel suspension for a wheelchair comprising:
- a wheel coupled to a first mounting bracket;
- a second mounting bracket adapted to be rigidly mounted to a wheelchair;
- and
- an upper bar and a lower bar each having front and rear ends pivotally connected to the second and first mounting brackets, respectively, so as to form a parallelogram configuration, wherein the front end of the lower bar is connected to the second mounting bracket via a resilient pivotal connection, said resilient pivotal connection being comprised of a cylindrical bore extending laterally through the second mounting bracket, the cylindrical bore being adapted to receive a torsion elastic element.
1 more element
A resilient anti-tip wheel suspension for a wheelchair comprising:
- a wheel coupled to a first mounting bracket;
- a second mounting bracket adapted to be rigidly mounted to a wheelchair;
- an upper bar and a lower bar each having front and rear ends pivotally connected to the second and first mounting brackets, respectively, so as to form a parallelogram configuration;
- and
- a pivotal lockout hook pivotally connected to the second mounting bracket, the pivotal lockout hook including a hook, the hook being displaceable into engagement with a the lower bar.
2 more elements
A resilient anti-tip wheel suspension for a wheelchair comprising:
- a caster assembly including a caster housing and a first mounting bracket, the housing pivotally supporting a rotatable wheel;
- a four-bar suspension system including two upper bars and two lower bars, the upper bars being connected together by an upper lateral bar and forming front and rear upper yokes, the lower bars being connected together by a lower lateral bar and forming front and rear lower yokes, the first mounting bracket being pivotally connected to the upper and lower rear yokes;
- and
- a second mounting bracket including a housing, the second mounting bracket being adapted to be mounted to a wheelchair, the second mounting bracket housing including a cylindrical bore, a torsion elastic element being adapted to be received by the bore, the second mounting bracket housing being pivotally connected to the upper and lower front yokes so as to form a parallelogram structure, the second mounting bracket housing being pivotally connected to the lower front yoke via the torsion elastic element.
1 more element
Dependencies are inferred from the claim text.