Elevator levelling

Details Elevator levelling Elevator levelling

2007-11-20

2007-11-20

Cuomo, Peter M. (Department: 3654)

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific load support drive-means or its control

Includes linking support cable in drive-means

C187S256000

Reexamination Certificate

active

11165228

ABSTRACT:
Elevators are maintained in level condition by four fixed ropes or cables passing diagonally across an elevator in angularly related opposite directions. The ropes extend from opposite corners of the elevator to fixed upper and lower ends. Moving the elevator causes equal and opposite changes in lengths of the portions of the ropes extending upward and downward from the pulleys on the elevator, keeping the elevator level.

REFERENCES:
patent: 610256 (1898-09-01), Brown
patent: 2861449 (1958-11-01), Cohan
patent: 2891636 (1959-06-01), Krieger et al.
patent: 5018925 (1991-05-01), Ganser
patent: 5119906 (1992-06-01), Kondratuk
patent: 5533595 (1996-07-01), Narumi et al.
patent: 6193016 (2001-02-01), Hollowell et al.
patent: 6345695 (2002-02-01), Fargo et al.
patent: 6742628 (2004-06-01), Bauer

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