Brakes – Internal-resistance motion retarder – Using a rotary-type fluid damper
Patent
1988-10-05
1990-02-13
Reger, Duane A.
Brakes
Internal-resistance motion retarder
Using a rotary-type fluid damper
74574, 188268, F16F 1520
Patent
active
048998540
ABSTRACT:
A modular element as a component of a damping member for support heads of motion picture or television cameras. The element includes a first annular portion that can be made integral with the rotor, and a second annular portion complementary to the first and that can be made integral with the stator of the support head. The first annular portion has on its inside surface a series of continuous concentric overhanging surfaces alternating with a series of complementary cavities, and the second annular portion has on its inside surface a series of continuous concentric overhanging surfaces as well as a a series of cavities complementary to such surfaces. The overhanging surfaces of the first and second portions engage respectively with the cavities alternating in a comb-like arrangement, and a continuous hollow space is provided between the two series of cavities and the two series of surfaces for the circulation of damping fluid.
REFERENCES:
patent: 2838955 (1958-06-01), Burch
patent: 3362510 (1968-01-01), Nash
patent: 3861503 (1975-01-01), Nash
patent: 3907079 (1975-09-01), Chapman
patent: 4694530 (1987-09-01), Foggini
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