Mechanical overspeed safety device

Details Mechanical overspeed safety device Mechanical overspeed safety device

1992-03-20

1994-05-10

Olszewski, Robert P.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

188189, D66B 516

Patent

active

053100220

ABSTRACT:
An overspeed governor comprises a pair of wedge brakes for selectively acting against a brake surface attached to the rotational shaft of an elevator drive. A maintaining apparatus is provided to maintain the wedge brakes in a normal position, out of engagement with the brake surface. A centrifugal actuating apparatus is also provided, attached to the rotational shaft of the elevator drive. If the rotational velocity of the elevator drive exceeds a predetermined limit, the centrifugal actuating apparatus displaces the maintaining apparatus, thereby allowing one of the wedge brakes to engage the brake surface.

REFERENCES:
patent: 1959528 (1934-05-01), Federici
patent: 3327811 (1967-06-01), Mastroberte
patent: 4029177 (1977-06-01), Fiss
patent: 4977982 (1990-12-01), Bialy et al.
Sheridan et al., U.S. Ser. No. 679,873, Apr. 3, 1991.

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