Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1980-08-15
1982-01-12
Michalsky, Gerald A.
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
13762564, 13762565, 251 65, 251137, 251141, F15B 13043, F15B 13044, F16K 3108
Patent
active
043101437
ABSTRACT:
The present invention is an electrically controlled valve (10) that includes an elongated valve body (38) with an axial passageway (48) disposed along the elongation axis (44) thereof. The valve body (38) has at least one inlet passageway (52) and at least one outlet passageway (56, 58) in fluid communication with the axial passageway (48). The valve (10) includes structure (60, 62) for establishing a static magnetic field within the valve body and axial passageway. The valve member (90) is mounted within the axial passageway (48) for reciprocation therein to selectively establish fluid communication between the inlet and outlet passageways of the valve body. The valve member (90) has at least a portion thereof formed of material that is magnetizable and of relatively low permeability. An electromagnetic device (78, 79) is mounted to the valve body for inducing a magnetic field within the magnetizable portion of the valve member such that the induced magnetic field interacts with the static magnetic field to position the valve member axially. Control apparatus is provided for regulating the energization of the electromagnetic device (78, 79) to thereby control the axial position of the valve member (90). The valve body is a substantially cylindrical member (38) with the axial passageway disposed along its central axis (44). The valve member (90) includes a spool portion (96) and first and second magnetizable end portions (92, 94) in one embodiment and in an alternative preferred embodiment valve member (10) is formed of magnetizable material along substantially its entire length. The electromagnetic device is, in the preferred embodiment, a coil (78, 79) which is mounted at each end of the cylindrical valve body (38) into which the first and second magnetizable portions (82, 94) of the valve member (90) extend. The control apparatus includes an electrical control circuit (172, 174) that regulates the magnitude and direction of direct current through the coil.
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Gresen Manufacturing Company
Michalsky Gerald A.
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