Solenoid-actuated valve
AssigneeGraham-White Sales Corporation
InventorVirgil L. Frantz
Life of this patent
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Abstract
A three-way normally closed or open solenoid-actuated valve having the solenoid coil wound on a spool and therewith inserted uncoated through a side into a solenoid housing and in place encapsulated in an epoxy resin for protecting the coil and by wedging the spool against relative movement in the housing, enabling its cylindrical bore to act as a fixed guideway for receiving and guiding a reciprocable solenoid plunger. Upper and lower O-rings, the lower encapsulated with the spool and coil, seal against leakage of fluid from the solenoid housing.
Claims6
A solenoid-actuated valve comprising a solenoid housing, a spool in said housing and having an axial bore, a plunger slidably reciprocable in and guided by said bore, a coil wound on said spool, and resin means in said housing and encapsulating said spool and coil, said resin means including inwardly flaring wedge means in said housing at opposite ends of said spool, and abutment means on and projecting beyond opposite ends of said spool and engaged by inner ends of said wedge means, said wedge means acting against said housing and axially and laterally on said spool for wedging said spool and therethrough said bore thereof against movement relative to said housing.
Dependencies are inferred from the claim text.