Tent – canopy – umbrella – or cane – Canes – sticks – crutches – and walking aids – Crutches
Patent
1988-07-08
1989-09-12
Hafer, Robert A.
Tent, canopy, umbrella, or cane
Canes, sticks, crutches, and walking aids
Crutches
135 74, 403102, A61H 302
Patent
active
048650641
ABSTRACT:
A hinge apparatus for coupling the component parts of a foldable device is provide. The hinge apparatus comprises a moveable sleeve adapted to tightly fit a guide and stop bushing operably connected with the support components of the foldable device. With the foldable device is in the use extended position, the moveable sleeve may surround and provide support to a hinge link. The hinge link is adapted to permit folding of the foldable device when the moveable sleeve is not surrounding the hinge link. A folding crutch comprising the hinge apparatus is provided. The folding crutch, comprising the hinge apparatus, provides the crutch user with safe, firm and sure support.
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Kent Michael S.
Parsons Thomas O.
Thompson Kenneth C.
Hafer Robert A.
Sam Charles H.
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