Tubular crutch construction

Details Tubular crutch construction Tubular crutch construction

1986-12-16

1988-03-29

Hafer, Robert A.

Tent, canopy, umbrella, or cane

Canes, sticks, crutches, and walking aids

Crutches

135 65, 135 68, 135 75, 403102, 403327, 403322, A61H 302

Patent

active

047336820

ABSTRACT:
A crutch of tubular construction has two crutch bows with straight parallel lower ends, between which is a leg carrier tube held by an upper fastener and lower rivets, and a crutch leg telescoped in the carrier tube. Weak points are avoided by gradually flattening the bows from a cylindrical cross section at the upper fastener through intermediate partially flattened bow portions to fully flattened bow ends at the lower rivets.

REFERENCES:
patent: 1035760 (1912-08-01), Walton
patent: 1317386 (1919-09-01), Pearl
patent: 3016060 (1962-01-01), Beattie
patent: 3858596 (1975-01-01), Thomas
patent: 3886962 (1975-06-01), Diamontis
patent: 4386466 (1983-06-01), Lee
patent: 4509741 (1985-04-01), Smith

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