Actuator using magnetic forces to reduce frictional forces

Details Actuator using magnetic forces to reduce frictional forces Actuator using magnetic forces to reduce frictional forces

1997-09-11

1998-12-01

Ferensic, Denise L.

Valves and valve actuation

Permanent or constantly energized magnet actuator

251160, 251192, 251158, 251208, 25112911, F16K 3108

Patent

active

058426809

ABSTRACT:
An actuator for opening and closing a valve with less resistance. The actuator includes a rotor, a stator, a valve and a shaft. The shaft having a first and second end, and an axis extending longitudinally therethrough. The stator, having an electromagnet mounted thereon, and circumferentially mounted around the shaft that extends therethrough. The rotor, fixedly mounted circumferentially around the first end, and having a permanent magnet mounted adjacent to the electromagnet and spaced a first distance therefrom. The valve including a rotary valve and valve seat. The rotary valve, mounted circumferentially around and near the second end, having a valve opening therein. The valve seat, mounted adjacent the rotary valve, having a seat valve opening therein, and fixedly attached to the stator. There actuator is designed for axially moving the rotor from the first distance to a second greater distance from the stator and thereby moving the rotary valve further away from the valve seat, and then axially rotate the shaft to a second position that aligned the seat valve opening and the valve opening, and then moving the rotor from the second distance back to the first lesser distance.

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