Prosthetic apparatus for supporting a user in sitting or standing positions
First Claim
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1. A prosthetic apparatus for positioning, moving and supporting a user in standing and seated positions, comprising:
- a base having ground wheels,a fixed member extending upwardly from the base, and a movable lift member disposed for movement relative to the fixed member,a mechanical drive mechanism having interengaging components on the fixed member and movable lift member, said components comprising a lead screw for moving said movable lift member relative to the fixed member,a drive motor controllable by the user to operate said mechanical drive mechanism to urge the lift member relative to the fixed member,a seat having front and rear edge portions, said rear edge portion being pivotally mounted relative to the movable lift member,at least one strut pivotally connected with the seat front edge portion and pivotally connected with the fixed member for movement of the seat between an extended user-seated position and a retracted user-standing position, andan electrical controller operable by the user for moving the movable member and said seat between user-standing and user-seated positions, and for controlling movement of the apparatus by selective powering of certain of said ground wheels.
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Abstract
A prosthetic apparatus is electrically operable by a user for lifting the user into standing position and lowering the user into a sitting position by power means operated by the user, the apparatus being a motorized wheelchair.
197 Citations
23 Claims
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1. A prosthetic apparatus for positioning, moving and supporting a user in standing and seated positions, comprising:
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a base having ground wheels, a fixed member extending upwardly from the base, and a movable lift member disposed for movement relative to the fixed member, a mechanical drive mechanism having interengaging components on the fixed member and movable lift member, said components comprising a lead screw for moving said movable lift member relative to the fixed member, a drive motor controllable by the user to operate said mechanical drive mechanism to urge the lift member relative to the fixed member, a seat having front and rear edge portions, said rear edge portion being pivotally mounted relative to the movable lift member, at least one strut pivotally connected with the seat front edge portion and pivotally connected with the fixed member for movement of the seat between an extended user-seated position and a retracted user-standing position, and an electrical controller operable by the user for moving the movable member and said seat between user-standing and user-seated positions, and for controlling movement of the apparatus by selective powering of certain of said ground wheels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A prosthetic apparatus for positioning and supporting a user in standing and seated positions, comprising:
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a base having two pivotable wheels and two powered wheels, a lifter comprising a fixed member extending upwardly from the base, and a movable lift member in telescoping relation with the fixed member, said lift member and movable member being of rectilinear cross-section to prevent relative rotation, a drive mechanism for moving the movable member relative to the fixed member, the drive mechanism including a lead screw threadedly engaging the movable member, a support frame on the upper portion of the movable member and having at least one arm extending outwardly to support the arms of the user, a seat having front and rear edge portions, said rear edge portion being pivotally connected relative to the movable member, at least one strut having an upper end portion pivotally connected with the outer edge portion of the seat and having an opposite end portion pivotally connected relative to a lower portion of the fixed member for movement of the seat between an extended user-seated position and a retracted user-standing position upon movement of the movable lift member downwardly and upwardly, and a controller operable by the user to operate the lifter to move the movable member upwardly and downwardly, to move the seat between user-standing and user-seated positions, and to control movement of the apparatus. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A prosthetic apparatus for positioning and supporting a user in standing and seated positions, comprising:
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a base having two pivotable front wheels and two powered rear wheels, each of the rear wheels being rotatable by a separate electrical motor to control the direction and speed of rotation of each respective wheel, a lifter comprising afixed member extending upwardly from the base, and a lift member in telescoping relation with the fixed member, said fixed member and movable member having rectilinear cross-section portions to prevent relative rotation, drive means comprising a lead screw for moving the movable member relative to the fixed member and threadedly engaging the movable member, a support frame on the upper portion of the movable member having two spaced arms extending outwardly to support the arms of the user, a seat having front and rear edge portions, said rear edge portion being pivotally connected relative to the movable member, at least one strut having upper end portions pivotally connected with the outer edge portion of the seat and having an opposite end portion pivotally connected relative to a lower portion of the fixed member for movement of the seat between an extended user-seated position and a retracted user-standing position upon movement of the lift member downwardly and upwardly, and a controller including a control unit mounted on the frame and on said at least one arm, the power means being controllable by the user to operate the lifter to move the movable member upwardly and downwardly, to move the seat between user-standing and user-seated positions, and to control movement and steering of the apparatus and the direction and speed of rotation of each of the respective ground wheels. - View Dependent Claims (18, 19)
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20. A prosthetic apparatus for positioning, supporting and moving a user in standing and seated positions, comprising:
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a frame having ground wheels thereon, a fixed member extending from the frame, a lift member mounted for movement relative to the fixed member, a mechanical drive mechanism comprising a lead screw for moving the lift member relative to the fixed member, a drive motor operable by the user to operate said mechanical drive mechanism to move the lift member relative to said fixed member, a seat having front and rear portions, said rear portion being pivotally mounted relative to said lift member, said seat front portion being pivotally connected with the at least one strut pivotally connected with said frame for movement of the seat between its extended user-seated position and its retracted user-standing position, and a control system operable by the user for moving the lift member and said seat between their user-standing and user-seated positions, and for controlling movement of the prosthetic apparatus by said ground wheels. - View Dependent Claims (21, 22, 23)
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Specification