Land vehicles – Wheeled – Occupant propelled type
Patent
1989-03-06
1990-06-19
Marmor, Charles A.
Land vehicles
Wheeled
Occupant propelled type
297DIG4, A47C 100
Patent
active
049347250
ABSTRACT:
A portable standing attachment for wheelchairs has first and second identical side assemblies constructed of front members, side members and stabilizers. The front member has a lower end pivoted on a pin extending laterally from a lower forward frame member of the wheelchair. A forward end of the side member is hinged near an upper end of a front member, and a rearward end of the side member is connected to the backrest frame of the wheelchair. An upper end of the stabilizer is pivotally connected to the front member. The stabilizer extends forward and downward through a guide on the side of a footrest. An upper cross bar has one end pivoted to an upper end of a front member. The other end of the cross bar telescopically connects to the upper end of the other frame member. Convertible armrests/knee supports are connected to the front members. Sliding upward on an armrest releases its upper end to pivot across the frame and to attach to the opposite front member after first twisting the cushion 180.degree. around its universal joint to form a knee support. The armrests are oppositely connected to form two parallel close together knee supports. A buttocks support is connected to one side member and swings across the back of the body as a person stands and engages to the other side member to support the person in a standing position. Two downward and rearward opening hooks on the side member engage short tubular receivers connected behind the main wheel axles to hold the side member in sitting position with the front members diagonally positioned on sides of the wheelchair. The upper cross bar is connected at the top of the side members behind the backrest. The stabilizers remain in the guides so that they automatically are positioned and retracted as the side assemblies are moved to the standing and sitting positions. A leg strap extends across lower front frame members of the wheelchair and lateral inward facing cushions are connected to the front lower frame members to cooperate with the knee supports and buttocks support in rigidly supporting a person's legs in the standing attachment.
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Kagen Alan M.
Marmor Charles A.
Wray James C.
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