Adjustable brake actuator, especially for vehicle drum brakes

Details Adjustable brake actuator, especially for vehicle drum brakes Adjustable brake actuator, especially for vehicle drum brakes

1985-11-08

1987-08-25

Halvosa, George E. A.

Brakes

Position adjusters

Slack

74 182, 92130C, 92168, 188 795GE, 192111A, F16D 6556

Patent

active

046886613

ABSTRACT:
A casing (10) has a bore (14) and a clutch face (48) concentric with the bore. In the bore (14) a tappet (30) of variable length is slidably guided and includes two threaded members (34,36) interconnected by a self-locking screw thread pair (38). A clutch member (50) connected to one of the two threaded members (34) by a non-self-locking screw thread pair (52) is associated with the clutch face (48). A support member (60 ) having an aperture (68) through which the other one of the two threaded members (36) extends is fixed to the casing (10). A clutch spring (70) is inserted between the support member (60) and the clutch member (50) and urges the clutch member (50) into abutment against the clutch face (48). A sealing boot (72) which is disposed outside of the support member (60) with respect to the casing (10) provides an external seal for the screw thread pairs (38,52) and the clutch member (50). The support member (60) and the sealing boot (72) are separately fixed to the casing (10).

REFERENCES:
patent: 2100488 (1937-11-01), Rasmussen
patent: 3068964 (1962-12-01), Williams et al.
patent: 3361232 (1968-01-01), Engle
patent: 3540554 (1970-11-01), Burnett et al.
patent: 3783981 (1974-01-01), Burgdorf
patent: 3800920 (1974-04-01), Warwick
patent: 4036332 (1977-07-01), Sander
patent: 4270442 (1981-06-01), Bainard et al.
patent: 4327925 (1982-05-01), Alexander et al.
patent: 4399894 (1983-08-01), Tribe
patent: 4535875 (1985-08-01), Ingram et al.

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