Caliper disc brake or the like

Brakes – Operators – Spring

Patent

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Details

188 723, B60T 1304

Patent

active

040420779

ABSTRACT:
This caliper disc brake is normally held in its engaged position by springs and is released by a solenoid which acts through a lever assembly to activate the plunger of a hydraulic master cylinder unit which directs a measured volume of hydraulic fluid into a brake cylinder during each stroke to release the brake and provide a predetermined brake clearance. Brake wear results in a gradually diminishing volume of fluid within the brake cylinder with the excess fluid displaced therefrom flowing into a reservoir of the master cylinder prior to directing the measured volume of hydraulic fluid into the brake cylinder during the next brake releasing stroke. The cross sectional area of the master cylinder plunger and the brake piston are designed to provide a substantial mechanical advantage, and the lever assembly is fulcrum to provide an additional mechanical advantage thus requiring a much smaller than average power means for releasing the brake.

REFERENCES:
patent: 3561573 (1971-02-01), Allen

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