Shapeable wheelchair seatback assembly
First Claim
Patent Images
1. A seatback assembly for use on a wheelchair comprising:
- a backrest comprising shapeable material; and
an adjustable support having a plurality of support members that are connected together by a plurality of support member couplings, the plurality of support members and the backrest being arranged to form a four-bar linkage that is pivotally connected to a wheelchair frame, the backrest being attached to the adjustable support, each of the plurality of support members being pivotally adjustable relative to the backrest and the other support members by the plurality of support member couplings in order to alter the curvature of the backrest from top to bottom, the support member couplings being configured to be moved from an unlocked position to a locked position to fix the backrest in place with the support member couplings, thus shaping the backrest.
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Abstract
The present invention is directed toward a seatback assembly that includes a backrest comprising shapeable material and an adjustable support, the backrest being attached to the adjustable support, the adjustable support being adjustable to alter the curvature of the backrest from top to bottom and then fix the backrest in place, thus shaping the backrest.
47 Citations
20 Claims
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1. A seatback assembly for use on a wheelchair comprising:
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a backrest comprising shapeable material; and an adjustable support having a plurality of support members that are connected together by a plurality of support member couplings, the plurality of support members and the backrest being arranged to form a four-bar linkage that is pivotally connected to a wheelchair frame, the backrest being attached to the adjustable support, each of the plurality of support members being pivotally adjustable relative to the backrest and the other support members by the plurality of support member couplings in order to alter the curvature of the backrest from top to bottom, the support member couplings being configured to be moved from an unlocked position to a locked position to fix the backrest in place with the support member couplings, thus shaping the backrest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A seatback assembly for use on a wheelchair comprising:
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a backrest comprising shapeable material; and an adjustable support having a plurality of support members arranged in a four-bar linkage configuration and pivotally connected by support member couplings wherein the plurality of support members are pivotally moveable relative to each other and the four-bar linkage is pivotally adjustable as a unit relative to a wheelchair frame, the backrest being attached to the adjustable support, the adjustable support being adjustable to alter the curvature of the backrest from top to bottom and the support member couplings being configured to move from an unlocked position to a locked position to fix the backrest in place, thus shaping the backrest.
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19. A seatback assembly for use on a wheelchair comprising:
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a backrest comprising shapeable material; and an adjustable support having a secondary support member and a tertiary support member that are pivotally adjustable relative to each other, the backrest being pivotally attached to the adjustable support such that the backrest, the secondary support, and the tertiary support pivotally connected by support member couplings that cooperate to form a four-bar linkage, the support member couplings being configured to be moved from an unlocked position to a locked position to define and fix a curvature of the backrest, the adjustable support being adjustable to provide a range of adjustment to alter the curvature of the backrest from top to bottom and then fix the backrest in place, thus shaping the backrest. - View Dependent Claims (20)
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Specification