Extendable leg rest assembly for a wheelchair
First Claim
1. An expandable elevating leg rest assembly for a wheelchair comprising:
- mounting means for mounting said leg rest assembly to said wheelchair;
an expandable strut assembly pivotally mounted to said mounting means for pivotal movement about a first pivotal axis proximate a distal end thereof between a lowered position and a raised position, said strut assembly including an extension member mounted for movement in a radial direction with respect to said first pivotal axis;
a footrest device carried by said extension member;
link means pivotally mounted proximate one end to said mounting means and pivotally mounted proximate an opposite end to said extension member, said link means being pivotally mounted to said mounting means at a location spaced relative to said first pivotal axis in a direction producing movement of said extension member in a direction away from said first pivotal axis to extend said extension member radially in response to pivotal movement of said strut assembly from said lowered position to said raised position;
a ratchet mechanism coupled between and in axial alignment with both a distal end of said mounting means and said distal end of said strut assembly for releasably retaining said strut assembly at any one of a plurality of positions between said lowered position and said raised position; and
cover means extending substantially over and shielding access to said ratchet mechanism;
, the pivotal mounting of said strut assembly to said mounting means, and at least a portion of said link means.
9 Assignments
0 Petitions
Accused Products
Abstract
An extendable leg rest assembly (20) having a footrest device (26) for a wheelchair including a mounting assembly (22) for mounting the leg rest assembly (20) to a frame (10) of the wheelchair. An elongated shaft (40) is pivotally coupled to the mounting assembly (22) to enable pivotal movement of the shaft (40) about a first pivotal axis (45) between a lowered position and a raised position. An elongated extension member (50) is telescopically mounted on the shaft (40) for reciprocating movement relative thereto. Pivotally coupled between the mounting assembly (22) and the elongated extension member (50) is a linkage (28). The linkage (28) pivots about a second pivotal axis (75) on the mounting assembly (22) spaced forwardly from the first pivotal axis (45). Upon pivoting of the shaft member (40) upwardly about the first pivotal axis (45), the linkage (28) causes the extension member (50) to slide outward on the shaft member (40 ) away from the mounting assembly (22) in response to the pivotal movement of the linkage (28) about the second pivotal axis (75).
57 Citations
17 Claims
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1. An expandable elevating leg rest assembly for a wheelchair comprising:
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mounting means for mounting said leg rest assembly to said wheelchair; an expandable strut assembly pivotally mounted to said mounting means for pivotal movement about a first pivotal axis proximate a distal end thereof between a lowered position and a raised position, said strut assembly including an extension member mounted for movement in a radial direction with respect to said first pivotal axis; a footrest device carried by said extension member; link means pivotally mounted proximate one end to said mounting means and pivotally mounted proximate an opposite end to said extension member, said link means being pivotally mounted to said mounting means at a location spaced relative to said first pivotal axis in a direction producing movement of said extension member in a direction away from said first pivotal axis to extend said extension member radially in response to pivotal movement of said strut assembly from said lowered position to said raised position; a ratchet mechanism coupled between and in axial alignment with both a distal end of said mounting means and said distal end of said strut assembly for releasably retaining said strut assembly at any one of a plurality of positions between said lowered position and said raised position; and cover means extending substantially over and shielding access to said ratchet mechanism;
, the pivotal mounting of said strut assembly to said mounting means, and at least a portion of said link means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An extendable elevating leg rest assembly for a wheelchair having a frame, comprising:
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mounting means for mounting said leg rest assembly to the frame; an elongated shaft member pivotally coupled at a first shaft end to said mounting means for pivotal movement between a lowered position and a raised position; ratchet means coupled between and in axial alignment with both a distal end of said mounting means and a distal end of said first shaft end for releasably retaining said shaft member at any one of a plurality of positions along said pivotal movement; an elongated extension member having a first extension end and an opposite second extension end, said first extension end telescopically coupled to said shaft member for reciprocating movement relative thereto; guide means disposed between said shaft member and said extension member for guiding said reciprocating movement; a footrest device carried by said second extension end of said extension member; link means pivotally coupled to both said mounting means and said extension member at locations producing extension of said extension member outward and away from said mounting means in response to said pivotal movement to said raised position; a lever extending outward from said ratchet means to a position away from said elongated shaft member and said link means for manual operable engagement of said ratchet means; and cover means extending substantially over and shielding access to said ratchet mechanism, the pivotal coupling of said shaft member to said mounting means, and at least a portion of said link means. - View Dependent Claims (17)
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Specification