Brake actuator

Details Brake actuator Brake actuator

1987-02-02

1987-10-27

Reger, Duane A.

Brakes

Position adjusters

Slack

188 795R, F16D 6556

Patent

active

047023546

ABSTRACT:
A hydraulic actuator for a vehicle brake incorporates an automatic adjuster which includes a strut of variable length formed by members which are threadedly interengaged by way of non-reversible screw thread connection. The member is an adjuster shaft which forms a reversible screw thread connection with a drive ring arranged to control rotation of the adjuster shaft during brake application and release. The non-reversible thread is subject, during brake application, to an axial force which is the resultant of forces derived from the braking pressure applied to different areas defined respectively by a seal on the piston and a further seal on the adjuster shaft. This ensures that random rotation of the adjuster shaft during brake application is resisted without the necessity for the application of axial spring load.

REFERENCES:
patent: 3809189 (1974-05-01), Farr
patent: 3811538 (1974-05-01), Farr
patent: 3878923 (1975-04-01), Farr
patent: 4006669 (1977-02-01), Price
patent: 4530424 (1985-07-01), Fukuzawa et al.
patent: 4533875 (1985-08-01), Ingram et al.

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