Abstract An electromechanical control valve in which a poppet is magnetically biased against a valve seat and is mechanically unseated upon decrease of the magnetic moment. A suspension plate carries the poppet on one side thereof and an armature on the other side to constitute an integrated assembly. A permanent magnet attracts the armature to thereby bias the poppet against the seat and deform the suspension plate. A coil is disposed on the armature and, when energized, develops a magnetic potential in opposition to the magnetic potential of the permanent magnet to thereby decrease the permanent magnet attraction whereby the deformed suspension plate, acting as a spring, urges the poppet out of the seat. The coil can be disposed so as to positively attract the armature through the null point to an opposite poll. The suspension plate also serves to isolate the magnetic circuit from the poppet-seat area.
An on-off electromechanical valve comprising: an armature-valve member; double-acting spring means pivotally supporting said armaturevalve member for movement between first and second positions, said spring means appLying a predetermined force to said armature-valve member when in its first and second positions urging said armature-valve member away from said first and second positions; permanent magnet means positioned to apply a force greater than that predetermined force of said spring means to said armaturevalve member to move said armature-valve member to said first position; and electromagnet means positioned, when energized, to 1 reduce the force applied by said permanent magnet means to a value less than that applied by said spring means; and 2 apply a force greater than that predetermined force of said spring means to said armature-valve member to move said armature-valve member to said second position.
Claim 2
Dependent Claim
137 words
An on-off electromechanical valve comprising: an armature-valve member; double-acting spring means pivotally supporting said armaturevalve member for movement between first and second positions, said spring means appLying a predetermined force to said armature-valve member when in its first and second positions urging said armature-valve member away from said first and second positions; permanent magnet means positioned to apply a force greater than that predetermined force of said spring means to said armaturevalve member to move said armature-valve member to said first position; and electromagnet means positioned, when energized, to 1 reduce the force applied by said permanent magnet means to a value less than that applied by said spring means; and 2 apply a force greater than that predetermined force of said spring means to said armature-valve member to move said armature-valve member to said second position.
Claim 3
Dependent Claim
53 words
The valve of claim 1 wherein said armature-valve member includes a valve head disposed in a chamber and a magnetically permeable member spaced from said valve head, said valve head and permeable member being positioned on opposite sides of said spring means, said spring means sealing said electromagnet means from said valve member.
Claim 4
Dependent Claim
16 words
The valve of claim 2 wherein said double-acting spring member forms one wall of said chamber.
Claim 5
Dependent Claim
30 words
The valve of claim 2 wherein said magnetically permeable member is a sleeve fitted over one end of said armature member, said valve head being at he opposite end thereof.