Tent – canopy – umbrella – or cane – Canes – sticks – crutches – and walking aids – Crutches
Patent
1979-04-04
1981-02-24
Bell, J. Karl
Tent, canopy, umbrella, or cane
Canes, sticks, crutches, and walking aids
Crutches
135 71, A61H 302
Patent
active
042521386
ABSTRACT:
This invention relates to elbow crutches and provides a crutch to enable a patient with leg disability to raise himself from a sitting position to a standing position. Basically the invention consists in an elbow crutch, the length of which is adjustable under the control of a manually operable lever. In particular, the crutch comprises two telescopically arranged tubular members and a spring urging one tubular member outwardly with respect to the other. A rack and pawl are provided to prevent relative movement between the two members, and the pawl is controlled by the manually operable lever. Normally a patient will use a pair of crutches in accordance with the invention, and will initially operate the lever of each crutch to reduce the length of the crutch to the minimum by pressing the crutch on the floor. He can then raise himself by supporting his weight on the two crutches alternately and operating the control lever of the crutch which is not supporting his weight to allow that crutch to extend.
REFERENCES:
patent: 2474722 (1949-06-01), Blume
patent: 2674253 (1954-04-01), Hopkins
patent: 2960095 (1960-11-01), Smith
patent: 3738674 (1973-06-01), Pauls
Aisenberg Irwin M.
Bell J. Karl
Berman Stanford W.
Platt Michael T.
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