Method and apparatus for protecting an immersed torque motor aga

Details Method and apparatus for protecting an immersed torque motor aga Method and apparatus for protecting an immersed torque motor aga

1974-12-19

1976-02-17

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Remote or follow-up control system for electrical actuator

335230, 335240, 291571R, 29607, H01F 708, F16K 3104

Patent

active

039387780

ABSTRACT:
An immersed electromagnetic torque motor having a movable flapper is protected against the accumulation of contamination in magnetic gaps of the motor and the resulting jamming of the motor by coating the motor with a lacquer or other fluid-impermeable material and mounting the motor in a blind fluid chamber from which the flapper projects. An aperture is provided in the coating at a low flux area on the exterior of the motor to admit the immersing fluid for purposes of mechanical damping and, at the same time, to restrict the migration of fluid and contaminants toward magnetic gaps within the torque motor.

REFERENCES:
patent: 3001757 (1961-09-01), Ball
patent: 3712339 (1973-01-01), Bartholomaus

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