Patent ID: 7414502
Filing Date: 2008-08-19
Classification: F16K

Abstract:
1. A coil-actuator for a cartridge type solenoid valve, said coil-actuator having a central bore and comprising: a metal frame to provide a path for magnetic flux; a coil carrying bobbin interiorly of said frame, within the confines thereof and insulated therefrom; a plastic encapsulation over the metal frame to form a cover for said frame and said bobbin; a pair of metal, axially spaced apart, flux path connectors at either end of said metal frame and bobbin, in intimate contact therewith, and at least partially retained by said cover; said connectors having central apertures substantially the same diameter as said bore, each connector having a first portion extending substantially outwardly from a longitudinal axis of the bore, and a second portion extending substantially parallel to the longitudinal axis of the bore, the second portion being in contact with the first portion; a receptacle formed intermediate a terminal edge of said cover and a portion of connectors and dimensioned to receive an O-ring in each of said receptacles; and a first capture element for engaging a cartridge insertable in said bore and having a portion for connection with one of said connectors and sealing by one of said O-rings; and a second capture element for connection with the other of said connectors and in sealing engagement therewith to seal the opposite end of said coil-actuator structure when said cartridge is installed in said bore, thereby simultaneously insuring a metal to metal contact with said connectors, whereby the flux density and path for flux, when the valve is in operation, is defined; wherein the second portion of each connector extends toward the first and second capture elements respectively, each O-ring being in sealing contact with a first and second portion of a respective connector and a respective capture element, the second portion of each connector being located between each respective O-ring and the bore in a radial direction.