Elevator means for the chair seat of a convertable wheel chair and bed
OwnerMartha A. Anderson, Robert M. Andersoninventors
Life of this patent
Estimating the term…
Abstract
The elevation of a chair seat from normal to raised bed level by cam action between the chair seat and a wheeled frame on which the chair seat is guided for up and down movement. A camshaft journaled on the underside of the chair seat with cam wheels at each end with cam edges supported on rollers journaled on the frame and lever means on the cam shaft connected to the backrest of the chair seat for rocking the cam shaft upon adjustment of the backrest between its condition of a backrest relative to the chair seat and a condition level with the chair seat as a part of the bed pad when the chair seat is raised to bed level.
Claims7
An invalid transferring apparatus comprising in combination:
- a. a wheeled frame having sides with fore and aft corner posts providing tubular guideways;
- b. a chair seat having leg-like rods at each of its four corners disposed in a respective corner post of said frame for guided up and down movement relative to the latter;
- c. a cam shaft journaled transversally of said frame on the underside and in spaced relation to said chair seat;
- d. support rollers mounted on said frame and adjacent each side wall thereof;
- e. a cam wheel secured to each end of said camshaft and having their cam edges supported on said support rollers;
- and
- f. lever means on said cam shaft for turning the latter to thereby change the position of said cam wheels, relative to said support rollers and effect a raising and lowering of said chair seat relative to said frame.
Dependencies are inferred from the claim text.