Portless type master cylinder device with intake valve and flow

Power plants – Pressure fluid source and motor – Pulsator

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Details

91 31, B60T 1116

Patent

active

047530758

ABSTRACT:
In this portless type master cylinder device, a cylinder bore is formed in a body thereof, and a piston member is fitted in the cylinder bore and is slidably movable from an initial axial position therein and defines a pressure chamber on its one side and a reservoir chamber on its other side in cooperation with the cylinder bore. An intake valve communicates between the cylinder chamber and the reservoir chamber, and is opened when the piston member is in its initial axial position while it is closed when the piston member moves through more than a determinate relatively small axial distance from its initial axial position. Intermediately along the fluid flow path between the intake valve and the reservoir chamber, there is provided a means for presenting a relatively high flow resistance to flow of fluid in the direction from the intake valve to the reservoir chamber. Thereby, in the dynamic operational mode, the stroke of the piston member has a much reduced inactive initial stroke portion, as compared with other portless type master cylinder devices, and the operational feeling of the master cylinder device is greatly improved.

REFERENCES:
patent: 4267697 (1981-05-01), Hodkinson
patent: 4492082 (1985-01-01), Belart
patent: 4550567 (1985-11-01), Schaefer

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