Importance

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Abstract

A pressure regulating valve is provided with a first valve for opening and closing a flow channel between a fluid pressure source and a reservoir, and a second valve for opening and closing a flow channel between an output chamber and the reservoir in order to regulate the pressure applied from the fluid pressure source in proportion to an input fluid pressure in an input chamber and to output the regulated pressure from the output chamber. A slidable valve body with one end subjected to an input pressure and the other end subjected to an output pressure, and a one-way valve for allowing communication only from the fluid pressure source to the output chamber are featured in that the movement of the valve body by a given quantity causes the first valve to close after the second valve is closed as the pressure in the input chamber rises.

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First Claim