Servovalve construction

Details Servovalve construction Servovalve construction

1988-12-08

1990-05-08

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13762561, F15B 13043

Patent

active

049229648

ABSTRACT:
A hydraulic servovalve including a torque motor and a valve housing containing a fluid inlet conduit in communication with a spool chamber, a spool within the spool chamber, a filter chamber within the spool, a filter within the filter chamber dividing the spool chamber into a first filter chamber section in communication with the fluid inlet conduit and a second filter chamber section on the opposite side of the filter from the first filter chamber section, a conduit within the housing for effecting communication between the second filter chamber section and nozzles associated with a flapper coupled to the torque motor, and the first filter chamber section being in communication with a fluid outlet in the valve housing. Also the spool can preferably have a notch therein for effecting direct communication between the fluid inlet and the fluid outlet in addition to the communication which is effected therebetween through the first filter chamber section of the filter chamber.

REFERENCES:
patent: 2532568 (1950-12-01), Myers
patent: 2977985 (1961-04-01), Ericson et al.
patent: 3029830 (1962-04-01), Klover et al.
patent: 3312353 (1967-04-01), Rosaen
patent: 3473562 (1969-10-01), Ellison
patent: 3698437 (1972-10-01), Cox
patent: 4169489 (1979-10-01), Inada et al.

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