Electromagnetic solenoid type flow control valve

Claim 2

An electromagnetic solenoid valve comprising: a valve body having inlet port means and outlet port means; linear motor means including hollow core means disposed in said valve body between said inlet and outlet port means and having a plurality of valve ports, sliding valve member means slidable along said hollow core means for cooperating with said valve ports in said hollow core means, including spring means and flange means for supporting said spring means, and solenoid means associated with said sliding valve member means for slidably moving the sliding valve member means along the hollow core member against the bias of said spring means when the solenoid means is energized; said linear motor means including a yoke member fixed within said valve body, and a pair of magnets fixed to said yoke member at spaced apart locations, each said magnet including an outer surface, an inner surface, and a pair of ends, said flange means including surfaces abutting each said magnet on one end thereof for avoiding exposure of said abutting surfaces of said flange means to dynamic pressure from said flowing fluid when said solenoid means is in a de-energized state; bypass passage means in said valve body extending radially outwardly around said linear motor means, and linearly parallel to said hollow core means, said linear motor means including openings into said bypass passage means for establishing direct radial fluid communication between said bypass passage means and said valve ports around said magnets for introducing fluid from said inlet port means through said passage means into said valve ports, said valve ports being controlled by said sliding valve member means said outlet port means comprising two outlet ports communicating with said inlet port means through said bypass passage means and the valve ports in said hollow core means, said valve ports being linearly spaced away from each other along said core means for substantial alignment with respective outlet ports.

Claim 3

An electromagnetic solenoid valve comprising: a valve body having inlet port means and outlet port means; linear motor means including hollow core means disposed in said valve body between said inlet and outlet port means and having a plurality of valve ports, sliding valve member means slidable along said hollow core means for cooperating with said valve ports in said hollow core means, including spring means for biasing said slidable valve member means and flange means for supporting said spring means, and solenoid means associated with said sliding valve member means for slidably moving the sliding valve member means along the hollow core means against the bias of said spring means when the solenoid means is energized; said linear motor means including a yoke member fixed within said valve body, and a pair of magnets fixed to said yoke member at spaced apart locations, each said magnet including an outer surface, an inner surface, and a pair of ends, said flange means including surfaces abutting each said magnet on one end thereof for avoiding exposure of said abutting surfaces of said flange means to dynamic pressure from said flowing fluid when said solenoid means is in a de-energized state; bypass passage means in said valve body extending radially outwardly around said linear motor means, and linearly parallel to said hollow core means, said linear motor means including openings into said bypass passage means for establishing direct radial fluid communication between said bypass passage means and said valve ports around said magnets for introducing fluid from said inlet port means through said passage means into said valve ports, said valve ports being controlled by said sliding valve member means; said hollow core means comprising a substantially cylindrical core member having one end in communication with said outlet port means, said cylindrical core member having valve port means in the cylindrical wall thereof, said inlet port means being outside said core member, said sliding valve member having a cylindrical configuration, and being mounted on said core member for slidable movement along the outer surface thereof for closing said valve port means; said valve body having a side opposite to said outlet port means including third port means in communications with the other end of said cylindrical core member, said cylindrical core member having partition wall means at an intermediate portion thereof for defining therein first and second chambers, said chambers respectively communicating with said one and said other ends, said valve port means being formed in said first chamber, and second valve port means being formed in said second chamber, said sliding valve member means being movable between a first position wherein said sliding valve member means closes said valve port means and opens said second valve port means and a second position wherein said sliding valve member means opens said valve port means and closes said second valve port means.

Claim 4

An electromagnetic solenoid valve comprising: a valve body having inlet port means and outlet port means; linear motor means including hollow core means disposed in said valve body between said inlet and outlet port means and having a plurality of valve ports, sliding valve member means slidable along said hollow core means for cooperating with said valve ports in said hollow core means, including spring means for biasing said slidable valve member means and flange means for supporting said spring means, and solenoid means associated with said sliding valve member means for slidably moving the sliding valve member means along the hollow core means against the bias of said spring means when the solenoid means is energized; said linear motor means including a yoke member fixed within said valve body, and a pair of magnets fixed to said yoke member at spaced apart locations, each said magnet including an outer surface, an inner surface, and a pair of ends, said flange means including surfaces abutting each said magnet on one end thereof for avoiding exposure of said abutting surfaces of said flange means to dynamic pressure from said flowing fluid when said solenoid means is in a de-energized state; bypass passage means in said valve body extending radially outwardly around said linear motor means, and linearly parallel to said hollow core means, said linear motor means including openings into said bypass passage means for establishing direct radial fluid communication between said bypass passage means and said valve ports around said magnets for introducing fluid from said inlet port means through said passage means into said valve ports, said valve ports being controlled by said sliding valve member means; said hollow core means comprising a substantially cylindrical core member having one end in communication with said outlet port means, said cylindrical core member having valve port means in the cylindrical wall thereof, said inlet port means being outside said core member, said sliding valve member having a cylindrical configuration, and being mounted on said core member for slidable movement along the outer surface thereof for closing said valve port means; said valve body having a side opposite to said outlet port means including third port means in communications with the other end of said cylindrical core member, said cylindrical core member having partition wall means at an intermediate portion thereof for defining therein first and second chambers, said chambers respectively communicating with said one and said other ends, said valve port means being formed in said first chamber, and second valve port means being formed in said second chamber, said sliding valve member means being movable between a first position wherein said sliding valve member means closes said valve port means and opens said second valve port means and a second position wherein said sliding valve member means opens said valve port means and closes said second valve port means.