Stair lift

Details Stair lift Stair lift

1988-09-06

1990-04-10

Spar, Robert J.

Material or article handling

Self-loading or unloading vehicles

Loading or unloading by other carrier or mover means, and...

414921, 187 9R, B60P 100

Patent

active

049155733

ABSTRACT:
A stair lift incorporates a pair of power jacks linked to a stair or step and associated with a vehicle such as a trailer adjacent the vehicle doorway, with the jacks operating in tandem to raise or lower the stair or step with a person standing thereon.

REFERENCES:
patent: 2921700 (1960-01-01), Reed, Jr.
patent: 3174634 (1965-03-01), Peck
patent: 4026387 (1977-05-01), Abreu
patent: 4071260 (1978-01-01), Marshall, Sr.
patent: 4124097 (1978-11-01), Hawks et al.
patent: 4133437 (1979-01-01), Gates
patent: 4176999 (1979-12-01), Thorley
patent: 4180366 (1979-12-01), Roth et al.
patent: 4306634 (1981-12-01), Sangster

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