Actuator for an internal shoe drum brake

Details Actuator for an internal shoe drum brake Actuator for an internal shoe drum brake

1983-03-03

1985-08-20

Halvosa, George E. A.

Brakes

Operators

Multiple

188196D, 188343, 188364, 192 83, 192111A, F16D 6524

Patent

active

045358753

ABSTRACT:
An actuator for a shoe drum brake has a body containing a tappet engaging one of a pair of brake shoes, and a split tappet of which the outermost piston engages the other brake shoe. A mechanical wedge actuator acts between the tappets for emergency and parking operation. The piston cooperates with an automatic adjuster of which a component normally engages an abutment member which bears against a shoulder within the body to isolate the adjuster from the piston of the split tappet and thereby from the other tappet.

REFERENCES:
patent: 3809189 (1974-05-01), Farr
patent: 3811538 (1974-05-01), Farr
patent: 3811539 (1974-05-01), Farr
patent: 3838757 (1974-10-01), Farr
patent: 3878923 (1975-04-01), Farr
patent: 4013150 (1977-03-01), Crabtree
patent: 4056173 (1977-11-01), Farr
patent: 4122921 (1978-10-01), Diggs et al.

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