Power screw disc brake with internal automatic slack adjuster

Details Power screw disc brake with internal automatic slack adjuster Power screw disc brake with internal automatic slack adjuster

1983-06-01

1985-01-01

Stoner, Jr., Bruce H.

Brakes

Wheel

Axially movable brake element or housing therefor

188 728, 188196BA, 188196D, F16D 55224

Patent

active

044912030

ABSTRACT:
A power screw type disc brake having an internal automatic slack adjustor of the single acting, clearance sensing type is provided. The actuating/clearance sensing mechanism (10) of the disc brake includes a power screw (18) selectively rotatable by means of a lever (12) which power screw is threadably engaged with a power nut (42) axially moveable but rotationally fixed relative to a housing (22). The power nut is resiliently urged by a spring (70) into constant engagement with a push rod member (50) which carries a pressure member (16) threadably attached thereto. The push rod member is axially and rotationally moveable relative to the housing and the pressure member (16) is axially moveable but rotationally fixed relative to the housing whereby rotation of the push rod member will result in axial movement of the pressure member for slack or running clearance adjustment purposes. The push rod member is rotationally connected to the power screw member by means of a torque limited friction clutch (84, 86, 88) and a separate one-way ratchet connection (94, 98) permits rotation of the push rod member relative to the housing in the direction of rotation axially moving pressure member (16) in the slack decreasing direction but prohibits rotation of the push rod member in the other direction of rotation.

REFERENCES:
patent: 3976168 (1976-08-01), Yamamoto
patent: 4014411 (1977-03-01), Troester
patent: 4022300 (1977-05-01), Afanador et al.
patent: 4036330 (1977-07-01), Henning et al.
patent: 4050549 (1977-09-01), Hori et al.
patent: 4319669 (1982-03-01), Wantanabe
patent: 4374551 (1983-02-01), Birkenbach et al.
patent: 4399894 (1983-08-01), Tribe

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