Land vehicles – Wheeled – Attachment
Patent
1977-08-31
1978-09-26
Song, Robert R.
Land vehicles
Wheeled
Attachment
B60R 302
Patent
active
041164571
ABSTRACT:
A power operated step assembly providing an auxiliary step adjacent the doorway of a vehicle. A box frame is secured to vehicle support structure below a doorway open to the interior of the vehicle. A step unit is movably connected to the box frame with two pair of parallel links. A transverse rod mounted on the frame is secured to one link of each pair of links so that the links are rotated in response to rotation of the rod. A power unit comprising a reversible electric motor and a lead screw carrying a nut is attached to the frame and crank arms connected to the rod. A step unit having a transverse platform pivoted to the lower ends of the links is selectively moved to an out step position and an in upper storage position in response to operation of the reversible electric motor.
REFERENCES:
patent: 2118557 (1938-05-01), Hamilton
patent: 3887217 (1975-06-01), Thomas
patent: 4020920 (1977-05-01), Abbott
Denney Roger W.
Nerem Marvin E.
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