Brakes – Position adjusters – Slack
Patent
1986-12-01
1988-05-10
Kashnikow, Andres
Brakes
Position adjusters
Slack
188 719, 188 729, 188106A, 188106F, 188196BA, 188196F, 188343, 188364, 188 7951, F16D 6546
Patent
active
047428970
ABSTRACT:
A self adjusting wheel cylinder for a drum brake including a brake drum and a brake shoe for exerting braking pressure on the drum with a shoe gap formed therebetween comprising a cylinder including an opening therein, hydraulic piston slidably mounted in the opening for activating the brake shoe upon movement in one direction, and for releasing the brake shoe upon movement in the other direction, and multiple adjusting screws within the cylinder for automatically adjusting the limit of movement of the piston in response to changes in the shoe gap of the brake, the multiple adjusting screws including a spindle having external screw-threads on both ends, the spindle is threadably mounted within the piston to one end thereof, and has a pair of multiple drive screws on the other end of the spindle for defining a fixed movement limit of the piston. A nut is attached to the multiple drive screws, the nut being adapted to rotate relative to the spindle when the brake is applied and the spindle being adapted to rotate relative to the nut and the piston when the brake is released.
REFERENCES:
patent: 2175446 (1939-10-01), Rasmussen et al.
patent: 2196799 (1940-04-01), Keplinger
patent: 2937725 (1960-05-01), Newell
patent: 3482664 (1969-12-01), Backmann
patent: 3540554 (1970-11-01), Burnett et al.
patent: 3712425 (1973-01-01), Torii et al.
patent: 3737011 (1973-06-01), Reinartz
patent: 3811538 (1974-05-01), Farr
patent: 3811539 (1974-05-01), Farr
patent: 3838757 (1974-10-01), Farr
patent: 4085830 (1978-04-01), Bottoms et al.
patent: 4530424 (1985-07-01), Fukuzawa et al.
Hiroshi Hirashita
Uchiyama Masahiko
Akebono Brake Industry Company Ltd.
Kashnikow Andres
Le Mark T.
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