Tent – canopy – umbrella – or cane – Canes – sticks – crutches – and walking aids – Crutches
Patent
1996-06-18
1998-12-15
Friedman, Carl D.
Tent, canopy, umbrella, or cane
Canes, sticks, crutches, and walking aids
Crutches
135 73, 135 68, A61H 302
Patent
active
058486038
ABSTRACT:
An improved arm piece assembly for a crutch comprising a hollow, thermoplastic blow-molded arm piece and an outer resilient covering molded to the outer surface of the arm piece. The inner side surface of the arm piece is located at a slight angle to the vertical, and is generally concave in the horizontal direction to more readily accommodate the ribcage of the user. The bottom surface of the end piece is provided with a pair of recesses which receive the ends of the bows of the crutch. The recesses are reinforced by depressions that are formed in the side surfaces of the end piece adjacent the recesses. The bow ends are locked within the recesses by fasteners such as spiral nails, which are driven through the depressions in the side surfaces of the end piece into engagement with the bow ends.
REFERENCES:
patent: 233824 (1880-10-01), Whittemore
patent: 1311664 (1919-07-01), Pearl
patent: 3304946 (1967-02-01), Lutes
patent: 3730198 (1973-05-01), Johnston et al.
patent: 4637414 (1987-01-01), Urban
patent: 4747278 (1988-05-01), Roncelli et al.
patent: 4837892 (1989-06-01), Lo
patent: 5351701 (1994-10-01), Hsiao
patent: 5458145 (1995-10-01), Davis
Friedman Carl D.
Lamico, Inc.
Yip Winnie S.
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