Quick fill type master cylinder

Power plants – Pressure fluid source and motor – Pulsator

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Details

60574, 60585, B60T 1108

Patent

active

046674667

ABSTRACT:
An improved quick fill type master cylinder having a structure in which a piston consisting of a smaller diameter piston portion and a larger diameter piston portion is slidably fitted into a stepped cylinder bore to define a hydraulic pressure chamber as well as a hydraulic oil supply chamber therein, a relief port opening to the hydraulic pressure chamber and a supply port opening to the hydraulic oil supply chamber are placed in communication with an oil reservoir via a hydraulic oil flow passage formed longitudinally in a cylinder casing, and a valve device is incorporated in the hydraulic oil flow passage. The hydraulic oil flow passage is formed by drilling and the like from the rear end face of the cylinder casing and a valve chamber of the valve device is provided in the oil flow passage near outside opening thereof. In this valve chamber are disposed a pressure responsive valve and a one-way valve, constituting the valve device, so as to be movable for open and close almost along a center axis of the oil flow passage. A blind plug is fitted to the outside opening of the oil flow passage as an end wall of the valve chamber.

REFERENCES:
patent: 4085770 (1978-05-01), Shaw
patent: 4373333 (1983-02-01), Coleman
patent: 4455831 (1984-06-01), Maehara

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