Drum brake

Details Drum brake Drum brake

1993-10-15

1995-10-17

Stodola, Daniel P.

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

Device includes rotatably driven, cable contacting drum

254376, 254378, 2423964, 2423966, 188180, 188 68, B66D 148, B66D 502, B60T 872, F16D 6300

Patent

active

054583187

ABSTRACT:
A safety mechanism for preventing a cable drum to rotate with overspeed has parallel ratchet wheels which encircle a brake drum. At a periphery of the ratchet wheels are stopping slots wherein a latching pawl is inserted when an overspeed is detected. The slots of the adjacent ratchet wheels are staggered. Thus the braking effect of each ratchet wheel starts at a different point of time.

REFERENCES:
patent: 2351997 (1944-06-01), Morrill
patent: 2974752 (1961-03-01), Howard
patent: 3659686 (1972-05-01), Markley
patent: 4058271 (1977-11-01), Ubukata et al.
patent: 4513952 (1985-04-01), Vandelinde
patent: 4520998 (1985-06-01), Flaig
patent: 4566674 (1986-01-01), Ebey et al.
patent: 5127631 (1992-07-01), Flaig
patent: 5217208 (1993-06-01), Stephenson

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