초록 ▼

A solenoid valve wherein a conical tip of a cylindrical plunger armature seals a flow-limiting orifice in an elastic valve-seat annulus, enabling minimum armature travel per unit of flow. The resulting short-gap, combined with a thin-walled armature housing and an efficient unitary exterior magnetic

A solenoid valve wherein a conical tip of a cylindrical plunger armature seals a flow-limiting orifice in an elastic valve-seat annulus, enabling minimum armature travel per unit of flow. The resulting short-gap, combined with a thin-walled armature housing and an efficient unitary exterior magnetic yoke yields a low reluctance magnetic circuit, and a high impedance solenoid. Wattage demand is reduced in both inrush and steady-state conditions. Choice of gap dimension and annulus design enables a low wattage demand, substantially free from variable fluid pressure effects. The use in combination of a unitary dual-path exterior magnetic loop, with a ferrous armature housing, and a novel phase-splitting core enable operation at still further reduced wattage values. Size, copper usage, temperature rise and cost are held to low values previously unattainable.

대표청구항 ▼

A solenoid fluid valve including in combination; valve body means having a fluid duct therethrough, annular valve seat means intermediate said duct having a flow restricting passage therethrough forming a sealable fluid orifice; and adjacent solenoid means having a ferrous core and a spring biased f

A solenoid fluid valve including in combination; valve body means having a fluid duct therethrough, annular valve seat means intermediate said duct having a flow restricting passage therethrough forming a sealable fluid orifice; and adjacent solenoid means having a ferrous core and a spring biased ferrous plunger armature extending within a coil, a ferrous structure exterior of said coil forming with said core and said armature a loop magnetic circuit, said armature arranged for operative motion axially coextensive of said core and having an outwardly extending portion adapted for sealing engagement with said orifice thereby defining the deenergized limit of motion of said armature; the improvement thereof comprising, a unitary housing for said armature including a tubular portion of substantially the same wall thickness throughout the tubular length thereof having one end closed by a transverse diaphragm portion and extending within said coil, said diaphragm substantially abutting an end of said core and defining the energized limit of motion of said armature; and said ferrous structure comprising a unitary member formed from a strip of ferrous material of elongate rectangular plan and being in substantially gapless assembly with an end of said core thereby enabling a substantially closed loop magnetic circuit comprising only said three specified ferrous magnetic elements.