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US 9,808,383 B2Granted
Elevated height wheelchair
AssigneePride Mobility Products Corporation
InventorsJames P. Mulhern, Stephen J. Antonishak
Life of this patent
Estimating the term…
Abstract
Embodiments of the present disclosure include a wheelchair configured to reposition an occupant between a lowered and a raised position. The wheelchair can include a frame, a seat moveable relative to the frame, a drive wheel, and one or more pairs of arm assemblies. The arm assembly includes a wheel configured to move from a first spatial location when the wheel chair is operating on flat, level ground to a second spatial location that is different than the first spatial location. Arm limiters can selectively engage the arm assembly based on at least one of a seat position, position of the arm assembly and surface conditions of ground surface. The arm limiters can limit the range of motion of the arm assembly and sometimes other operational aspects of the chair.
Claims31
A powered wheelchair comprising:
- a frame;
- a lift mechanism supported by the frame;
- a seat supported by the lift mechanism, the lift mechanism configured to move the seat between a lowered position and a raised position;
- a pair of drive wheels;
- at least one drive coupled to the frame and configured to apply a torque to at least one of the drive wheels;
- an arm assembly including an arm member that is pivotably coupled to the frame and a wheel coupled to the arm member, the arm member configured to be in a first position relative to the frame when the wheelchair is operating on flat ground and to be rotatable from that first position;
- and
- an arm limiter supported by the frame and configured to inhibit motion of the arm member, the arm limiter including a crank rotatably coupled to the frame at a rotation point, and an elongate lever that is rotatably coupled to the frame at the rotation point, the elongate lever having a first end and a second end opposite the first end, and the second end of the elongate lever is configured to be in selective contact with a surface of the arm member, the arm limiter having a) a first configuration in which the arm member is rotatable from the first position through a first range of rotation, and b) a second configuration in which the arm member is rotatable from the first position only through a second range of rotation that is smaller than the first range of rotation,
- wherein the arm limiter is prevented from transitioning into the second configuration when the arm member is rotationally different from the first position.
6 more elements
A powered wheelchair comprising:
- a frame;
- a lift mechanism supported by the frame;
- a seat supported by the lift mechanism, the lift mechanism configured to move the seat between a lowered position and a raised position;
- a pair of drive wheels;
- at least one drive coupled to the frame and configured to apply a torque to at least one of the drive wheels;
- a front arm assembly including a front arm member that is rotatably coupled to the frame and a wheel coupled to the front arm member, the front arm member configured to be in a first position relative to the frame when the wheel chair is operating on flat ground;
- an arm limiter supported by the frame and configured to inhibit motion of the front arm member, the arm limiter having a first configuration in which the front arm member is rotatable from the first position through a first range of rotation, and a second configuration in which the arm member is rotatable from the first position only through a second range of rotation that is smaller than the first range of rotation;
- and
- a linkage assembly that operatively connects the lift mechanism to the arm limiter such that as the seat is moved between the lowered and raised positions, the linkage assembly causes the arm limiter to transition between the first and second configurations,
- wherein the arm limiter is prevented from transitioning into the second configuration when the arm member has rotated from the first position to a second position.
7 more elements
A powered wheelchair comprising:
- a frame;
- a lift mechanism supported by the frame;
- a seat supported by the lift mechanism, the lift mechanism configured to move the seat between a lowered position and a raised position;
- a pair of drive wheels;
- at least one drive coupled to the frame and configured to apply a torque to at least one of the drive wheels;
- an arm assembly including an arm member that is rotatably coupled to the frame and a wheel coupled to the arm member, the arm member configured to be in a first position relative to the frame when the wheel chair is operating on flat ground;
- an arm limiter supported by the frame and configured to inhibit motion of the arm member, the arm limiter having a first configuration in which the arm member is rotatable from the first position through a first range of rotation, and a second configuration in which the arm member is rotatable from the first position only through a second range of rotation that is smaller than the first range of rotation;
- and
- a linkage assembly that operatively connects the lift mechanism to the arm limiter such that as the seat is moved between the lowered and raised positions, the linkage assembly causes the arm limiter to transition between the first and second configurations.
6 more elements
Dependencies are inferred from the claim text.