Motorized standing wheelchair
First Claim
1. A standing wheelchair, comprising:
- a base frame having front and rear ends;
a pair of front wheels connected to the front end of the base frame for supporting the front of the wheelchair and at least one rear wheel connected to the rear end of the base frame for supporting the rear of the wheelchair; and
a seat assembly connected to the front end of the base frame, said seat assembly including a seat portion having a front center, said seat portion pivotable between a generally horizontal, seated position and an angled standing position, and an actuator for actuating the seat portion between the seated and standing positions;
the seat assembly further including a stub pivot shaft located proximate the front center of the seat portion for pivotally connecting the seat portion to the base frame, said stub pivot shaft being spaced vertically above the seat portion.
4 Assignments
0 Petitions
Accused Products
Abstract
A standing wheelchair includes a base frame, a pair of front driveable wheels connected to the front end of the frame, and a pair of rear wheels connected to the rear end of the frame. A seat assembly is connected to the front end of the frame and includes a seat portion that is pivotable between a generally horizontal, seated position and a raised, angled standing position. The seat portion pivots about a central stub pivot shaft located at the front thereof, with the stub pivot shaft being vertically offset above the seat portion. An actuator is connected between the front end of the seat assembly and the rear end of the seat assembly to actuate the seat portion between the seated and standing positions. An adjustable knee support assembly is connected to the front end of the seat assembly and is located behind the axles of the front wheels, and a footrest plate is connected to the frame at the front end between the front pair of wheels. By offsetting the stub pivot shaft above the seat portion, the pivot axis of the seat portion is located between the user'"'"'s knees, thereby reducing shear on the user. Further, the seat assembly is designed so as to be easily removable as a single unit from the base frame, to allow the use of different seat assemblies on the base frame.
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Citations
29 Claims
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1. A standing wheelchair, comprising:
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a base frame having front and rear ends;
a pair of front wheels connected to the front end of the base frame for supporting the front of the wheelchair and at least one rear wheel connected to the rear end of the base frame for supporting the rear of the wheelchair; and
a seat assembly connected to the front end of the base frame, said seat assembly including a seat portion having a front center, said seat portion pivotable between a generally horizontal, seated position and an angled standing position, and an actuator for actuating the seat portion between the seated and standing positions;
the seat assembly further including a stub pivot shaft located proximate the front center of the seat portion for pivotally connecting the seat portion to the base frame, said stub pivot shaft being spaced vertically above the seat portion.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A standing wheelchair, comprising:
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a base frame having front and rear ends;
a pair of front wheels connected to the front end of the base frame for supporting the front of the wheelchair and at least one rear wheel connected to the rear end of the base frame for supporting the rear of the wheelchair; and
a seat assembly connected to the front end of the base frame, said seat assembly including a seat portion pivotable between a generally horizontal, seated position and an angled standing position, and an actuator for actuating the seat portion between the seated and standing positions;
said actuator being connected at a first end thereof to a front end of the seat assembly and connected at a second end thereof to a rear end of the seat portion proximate the center thereof;
wherein the front end of the seat portion is pivotally connected to the base frame by a pivot assembly which is the only connection between the seat assembly and the base frame; and
wherein the seat portion includes a seat support bar extending between the front and rear ends thereof proximate the center thereof, said seat support bar defining a channel facing the actuator, and wherein the second end of the actuator is disposed within the channel, and wherein the first end of the actuator is disposed outside of the channel. - View Dependent Claims (28)
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29. A standing wheelchair, comprising:
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a base frame having front and rear ends;
a pair of front wheels connected to the front end of the base frame for supporting the front of the wheelchair and at least one rear wheel connected to the rear end of the base frame for supporting the rear of the wheelchair; and
a seat assembly connected to the front end of the base frame, said seat assembly including a seat portion pivotable between a generally horizontal, seated position and an angled standing position, and an actuator for actuating the seat portion between the seated and standing positions;
a back support assembly pivotally connected to the seat portion, and first and second arm rests pivotally connected to the back support assembly; and
a leveling mechanism connected to the first and second arm rests to maintain the arm rests parallel to a ground surface when the seat portion is moved to the standing position, wherein the back support assembly includes a connector disposed adjacent a base thereof for connecting the back support assembly to the seat portion; and
wherein the leveling mechanism comprises a bracket that is pivotally mounted on the back support assembly and is connected to the arm rests, and a cable connected to the bracket and to the connector.
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Specification