Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1976-12-01
1978-04-11
Blunk, Evon C.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
B66B 516
Patent
active
040834328
ABSTRACT:
A safety arrangement for an elevator system includes a governor means driven by a vertically suspended elongated flexible member. The flexible member is attached to the actuating member of a braking means which is mounted on an elevator car. When the car overspeeds in a downward direction the governor, operating through the flexible member, actuates the braking means to stop the car. When the car is moving upwardly and decelerating, the flexible member produces an inertial force which is applied to the actuating member of the braking means. To prevent this inertial force from operating the braking means, the safety arrangement includes a compensating means. The compensating means is mounted on the car and operates in response to its deceleration at a predetermined rate to apply a compensating force to the actuating member. This compensating force has a predetermined magnitude and opposes the inertial force of the flexible member to prevent such inertial force from operating the braking means.
REFERENCES:
patent: 557117 (1896-03-01), Ellithorpe
patent: 1937035 (1933-11-01), Dunlop
patent: 2274000 (1942-02-01), Sahlin
patent: 2298167 (1942-10-01), Rissler
patent: 2402285 (1946-06-01), Hymans
patent: 2490653 (1949-12-01), Sahlin
patent: 3441107 (1969-04-01), Thorne et al.
Blunk Evon C.
Mayer Robert T.
Otis Elevator Company
Rowland James L.
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