Patent ID: 6310533
Filing Date: 2001-10-30
Classification: H01F

Abstract:
A solenoid encapsulated to be water resistant, the solenoid comprising:a. a bobbin molded of resin and configured to have a coil-supporting region extending axially between a pair of end flanges, the bobbin having an axial opening extending through the coil-supporting region between the end flanges;b. a coil of wire wound on the coil-supporting region of the bobbin between the end flanges;c. a tubular reinforcing core fitted within the axial opening to extend between the end flanges and strengthen the coil-supporting region of the bobbin;d. the end flanges each having an outer flange portion extending radially beyond an outside diameter of the wire coil and an inner flange portion extending radially to an outside diameter of the wire coil;e. the outer flange portion of the end flanges being thinner than the inner flange portion of the end flanges;f. a solenoid housing containing the resin bobbin, the reinforcing core, and the wound wire coil;g. resin insulated lead wires running from the wound wire coil within the solenoid housing out through an opening in the housing;h. a volume of encapsulating resin molded within the housing, the encapsulating resin being compatible with and forming water-resistant bonds with the resin forming the bobbin and with the resin insulating the lead wires; andi. the encapsulating resin forming water-resistant bonds with the bobbin flange and with the resin insulating the lead wires within the housing so that the encapsulating resin encloses the wound wire coil, in a water-resistant encapsulation formed within the housing.