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A three-way valve assembly having a reciprocable valve plunger movably controlled by a solenoid. The valve housing has an elastomeric orifice member seated thereon, which orifice member controls flow of pressure fluid from a source. The valve plunger has an enlarged nondeformable valve surface there

A three-way valve assembly having a reciprocable valve plunger movably controlled by a solenoid. The valve housing has an elastomeric orifice member seated thereon, which orifice member controls flow of pressure fluid from a source. The valve plunger has an enlarged nondeformable valve surface thereon which engages a projecting end portion of the orifice member for sealingly closing off the orifice.

대표청구항 ▼

An electrically-operated plunger-type valve assembly, comprising: housing means including first and second housing parts which are joined together and define an interior chamber at the interface therebetween; electrical winding means stationarily associated with said first housing part and including

An electrically-operated plunger-type valve assembly, comprising: housing means including first and second housing parts which are joined together and define an interior chamber at the interface therebetween; electrical winding means stationarily associated with said first housing part and including a central sleevelike spool having an electrical winding therearound, said sleevelike spool defining therein an elongated central opening which extends along a central longitudinal axis of the winding means and opens into said interior chamber; said winding means including a magnetically conductive frame disposed in surrounding relationship to said electrical winding, said magnetically conductive frame including an end plate which extends across one axial end of said winding means and has a central opening therethrough aligned with the central opening of said sleeve, said end plate defining an axial boundary for said interior chamber; plunger means of a generally T-shaped configuration supported for limited reciprocal axial movement along said longitudinal axis, said plunger means including an elongated substantially cylindrical stem movably guidably supported within the central opening of said spool, said plunger means including a radially enlarged platelike head fixed to one end of said stem and positioned within said interior chamber, said platelike head projecting radially outwardly from said stem so as to substantially radially overlap said end plate, said head having a back face which is positioned in axially opposed relationship to said end plate and is separated therefrom by a narrow air gap; first and second ports formed in said housing means and communicating with said interior chamber, said first port extending through said second housing part from an outer surface thereof for direct communication with said interior chamber, said first port being substantially coaxially aligned with said longitudinal axis; a cylindrical orifice member of a stiff elastomeric material stationarily seated on said second housing part within said first port and defining a small-diameter orifice therethrough for communication with said interior chamber, said orifice member having an inner end defining thereon an end surface which is disposed axially opposite said head of said plunger means, said end surface defining thereon an annular valve seat in surrounding relationship to said orifice; said orifice member being insertable into said first port from the axially outer end thereof so as to control the desired axial spacing between said valve seat and said head, said second housing part having a surrounding wall defining said first port which is free of shoulders and the like which would prevent the cylindrical orifice member from being axially slidably inserted into said first port from the outer end thereof, said orifice member being stationarily held in position within said first port by means of a compressive interference fit between the periphery of the orifice member and the surrounding wall of the first port, said surrounding wall over at least a portion of the axial extend thereof including a plurality of ribs which project radially inwardly for compressively deforming the peripheral portion of the orifice member for stationarily seating the orifice member on the second housing part, said plurality of ribs being circumferentially spaced around the first port and extending axially thereof to permit the orifice member to be axially slidably inserted into said first port; and said head of said plunger means defining thereon a nondeformable front face which is disposed axially opposite said annular valve seat and is positioned closely adjacent same, said front face sealingly engaging said valve seat when said plunger means moves into engagement with said orifice member to define a valve closing position.