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US 6,585,279 B1Granted
Leg extension assembly
AssigneeMedical Industries America, Inc.
InventorsRobert Galloway, Phic Lovan
Life of this patent
Estimating the term…
Abstract
An improved wheelchair leg rest extension system. The system includes a ball screw assembly provided within a steel sleeve of the wheelchair frame, and actuated by an electric motor to raise and lower a leg rest, while protecting the ball screw assembly from damage, and reducing the unsightliness and potential for damage associated with external extension and retraction means.
Claims19
An improved wheelchair leg rest extension apparatus, comprising:
- (a) a frame, including a frame tube;
- (b) an extensible member operably received within said frame tube;
- (c) a leg rest operably coupled to said extensible member;
- (d) means coupled to said extensible member for extending and retracting said extensible member;
- and
- (e) means provided within said frame and operably coupled to said extensible member for moving said extensible member relative to said frame.
3 more elements
An improved wheelchair leg rest extension apparatus comprising:
- (a) a frame having a frame tube;
- (b) a screw received by said frame tube;
- (c) a leg rest operably coupled to said screw;
- and
- (d) means for rotating said screw in a manner which rotates said leg rest in response to rotation of said screw.
2 more elements
An improved wheelchair comprising:
- (a) a seat;
- (b) a wheel;
- (c) a frame having a frame tube;
- (d) wherein said frame tube is positioned for transmission of force from said seat to said wheel;
- (e) a screw received by said frame tube;
- (f) a leg rest operably coupled to said screw;
- and
- (g) means for rotating said screw in a manner which rotates said leg rest in response to rotation of said screw.
5 more elements
Dependencies are inferred from the claim text.