Double-locking adjustable brace

Details Double-locking adjustable brace Double-locking adjustable brace

1987-11-18

1988-11-08

Bell, J. Karl

Tent, canopy, umbrella, or cane

Canes, sticks, crutches, and walking aids

Telescopic

2483543, A45B 900

Patent

active

047828455

ABSTRACT:
This invention relates to a double-locking adjustable brace especially one which comprises an inner rod, an outer tube, a locking device consisting of two cams, two brake shoes. A spring and a driven plate, and a torsion reducer consisting of a plastic cover, a pivot screw and a concave support. The inner rod is telescopically fitted in the outer tube so that the brace is adjustable in length. The inner rod disengages and engages one of the cams by means of internal and external toothings so that the cams of the locking device can be turned to expand and make the brake shoes to grip the outer tube. The torsion reducer consists of a special washer, a screw pivot, a metal support and a plastic cover and is constructed in such way that the plastic cover can turn freely on the screw pivot to reduce the torsion incidentally applied on the brace.

REFERENCES:
patent: 2532168 (1950-11-01), Jakoubek
patent: 2671680 (1954-03-01), Stevens
patent: 2747829 (1956-05-01), Schubert
patent: 4582079 (1986-04-01), Fields

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