Wedge-type actuator for actuating drum brakes

Details Wedge-type actuator for actuating drum brakes Wedge-type actuator for actuating drum brakes

1988-12-20

1992-04-14

Halvosa, George E. A.

Brakes

Wheel

Transversely movable

24110, 192 93C, F16D 5122

Patent

active

051039443

ABSTRACT:
A wedge-type actuator for actuating drum brakes including guide rollers positioned between the wedge and a plunger that contacts the leading brake shoe. The guide rollers are carried between a guiding surface on the wedge and a guiding surface in the housing, to take up the reaction forces caused by the larger actuation forces needed to operate the trailing brake shoe. The disclosed arrangement provides more even braking forces, and thereby results in more even brake shoe wear.

REFERENCES:
patent: 500289 (1893-06-01), McKillip
patent: 1799229 (1931-04-01), Hanna
patent: 1848775 (1932-03-01), Girling
patent: 2953344 (1960-09-01), Yancey
patent: 3395584 (1968-08-01), Cox et al.
patent: 3511103 (1970-05-01), Cox, Jr.
patent: 3707845 (1973-01-01), Mitton
patent: 3869025 (1975-03-01), Oliver

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