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US 4,324,317 AGranted
Elevator device
OwnerDean R. Winkelblechinventor
Life of this patent
Estimating the term…
Abstract
This invention is an electrically powered elevator comprised of a hollow support member through which a screw passes. A reversible electric motor rotates the screw. A support nut attached to a platform engages the screw and an electrical control system attached to the platform allows a person standing on the platform to be raised or lowered by the rotation of the screw.
Claims7
An elevator device adapted for attachment to a substantially upright surface comprising in combination:
- a hollow support member attached to said upright surface;
- an electric motor attached to said support member;
- a screw rotatably coupled to said electric motor and extending within said support member;
- a support nut rotatably engaged with said screw;
- an inner slide connected to said support nut and in sliding contact with the interior surface of said hollow support member;
- a platform member attached to said inner slide, said platform member comprising in combination:
- a platform support member attached to said inner slide;
- a platform adjusting member rotatably attached to the middle portion of said platform support member;
- a platform rotatably attached to said platform adjustment member, said platform being rotatably hinged to said platform support member;
- a hand grip member attached to said inner slide;
- a dual button attached to said hand grip member;
- an electrical conduit extending from said dual button device to said electric motor and adapted to rotate said electric motor in both a clockwise and counterclockwise direction upon the activation of said dual button.
9 more elements
Dependencies are inferred from the claim text.