Stairs climbing walker

Details Stairs climbing walker Stairs climbing walker

1997-05-21

1998-08-04

Mai, Lanna

Tent, canopy, umbrella, or cane

Canes, sticks, crutches, and walking aids

Walker type

135 78, 135 76, 280 87021, A61H 300

Patent

active

057879133

ABSTRACT:
A walker to assist physically impaired persons in ascending and descending stairs, has two rear legs pivotally attached to two front legs. When the walker is in use, the rear legs are locked against any pivotal movement; when stairs are to be negotiated, a locking member is released to permit relative pivotal movement of the rear legs in respect to the front legs. Thus, the front and rear legs can be placed on the staircase. After this has been done, the legs again are locked into position. The walker maintains this relative position so that the person using it may negotiate the stairs. The locking member is in the form of a toothed substantially circular gear and spring biased bolt.

REFERENCES:
patent: 2708473 (1955-05-01), Gable et al.
patent: 3167700 (1965-01-01), Drury, Jr.
patent: 3421529 (1969-01-01), Vestal
patent: 3455313 (1969-07-01), King
patent: 3688789 (1972-09-01), Bunch
patent: 4094331 (1978-06-01), Rozsa
patent: 4411283 (1983-10-01), Lucarelli
patent: 5349977 (1994-09-01), Wood
patent: 5603517 (1997-02-01), Lorman
patent: 5649558 (1997-07-01), Richard
patent: 5702326 (1997-12-01), Renteria

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