Control valve for controlling fluid passage

Details Control valve for controlling fluid passage Control valve for controlling fluid passage

1986-02-18

1988-08-09

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Having element dimensionally responsive to field

251 57, 60545, 60566, F16K 3102

Patent

active

047623004

ABSTRACT:
A piston in a first cylinder is driven as a piezoelectric element group, which includes a plurality of laminar piezoelectric elements stacked in layers, extends or contracts. A second cylinder is formed so as to connect with a first fluid pressure chamber which is defined in the first cylinder by the piston. A piston-shaped valve member is disposed in the second cylinder. The valve member is urged toward the first fluid pressure chamber by a spring. The first fluid pressure chamber is supplied with a fluid whose pressure is set by means of a selector valve. When the selector valve is closed, the fluid pressure chamber is defined as an independent compartment. In this state, high voltage is applied to the piezoelectric element group to elongate it, thereby driving the piston. Thus, the valve member is actuated by the fluid pressure inside the first fluid pressure chamber, and a fluid passage is opened and closed by the valve member.

REFERENCES:
patent: 2839264 (1958-06-01), Trubert
patent: 3648967 (1972-03-01), O'Neill et al.
patent: 4022166 (1977-05-01), Bart
patent: 4322055 (1982-03-01), Baumann
patent: 4471256 (1984-07-01), Igashira et al.
Patents Abstracts of Japan, vol. 7, No. 275 (M-261) [1420], 8th Dec. 1983, page 95 M 261, JP-A-58 152 986 (Nippon Jidosha Buhin Sogo Kenkyusho K.K.) 10-09-1983.

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