Solenoid valve

Claim 2

In a solenoid valve, a laminated C-shaped core, a T-shaped armature of laminated construction, a coil adjacent said core and surrounding the central portion of said armature, the arms of said armature being disposed outside the ends of said core, springs disposed between one end of said coil and the arm end of said armature and directly urging the arms of said armature away from said core, said springs being laterally spaced from the arms of said armature, said arms thus being engageable directly with the ends of said core when the coil is energized, a first poppettype valve at one end of said armature, and a second poppet-type valve at the opposite end of said armature.

Claim 3

The combination according to claim 1, said second valve comprising a valve seal carried in a recess at said opposite end of the armature and engageable with a seat carried by said core in response to energization of said coil, whereby said springs will be compressed and said first valve opened.

Claim 4

The combination according to claim 2, said valve seal comprising a rubberlike member spring-urged toward said valve seat and retained in said recess, whereby the arms of said armature may contact said core when the coil is energized.

Claim 5

The combination according to claim 1, said armature having a pair of outside laminations carrying outwardly bent ears, said springs comprising two springs engaging said ears.

Claim 6

In a solenoid valve, a laminated C-shaped core, a T-shaped armature of laminated construction, a coil adjacent said core and surrounding the central portion of said armature, the arms of said armature being disposed outside the ends of said core, springs disposed between one end of said coil and the arm end of said armature and urging the arms of said armature away from said core, a first poppet-type valve at one end of said armature, and a second poppet-type valve at the opposite end of said armature, said second valve comprising a valve seal carried in a recess at said opposite end of the armature and engageable with a seat carried by said core in response to energization of said coil, whereby said springs will be compressed and said first valve opened, a base, inlet, working and exhaust ports in said base, a recess in said base within which said T-shaped armature is disposed, said working port being connected to said recess, one of said other ports being connected to a seat for said first valve, a space surrounding said armature and extending to said second valve, whereby fluid will flow between said first valve seat and said working port through said base recess when said coil is energized and will flow between said working port and said second valve seat through said recess and space when the coil is deenergized, and passageway means connecting said second valve seat to its port.

Claim 7

In a solenoid valve, a laminated C-shaped core, a T-shaped armature of laminated construction, a coil adjacent said core and surrounding the central portion of said armature, the arms of said armature being disposed outside the ends of said core, springs disposed between one end of said coil and the arm end of said armature and urging the arms of said armature away from said core, a first poppet-type valve at one end of said armature, and a second poppet-type valve at the opposite end of said armature, said second valve comprising a valve seal carried in a recess at said opposite end of the armature and engageable with a seat carried by said core in response to energization of said coil, whereby said springs will be compressed and said first valve opened, a base, inlet, working and exhaust ports in said base, a recess in said base within which said T-shaped armature is disposed, said working port being connected to said recess, one of said other ports being connected to a seat for said first valve, a space surrounding said armature and extending to said second valve, whereby fluid will flow between said first valve seat and said working port through said base recess when said coil is energized and will flow between said working port and said second valve seat through said recess and space when the coil is deenergized, and passageway means connecting said second valve seat to its port.

Claim 8

The combination according to claim 5, further provided with a casing surrounding said coil and core, said passageway means comprising a tube in said casing connected with a passage in said base.

Claim 9

In a solenoid valve, a base having an inlet port, a working port and an exhaust port extending from the sides thereof, an electrical receptacle carried by said base, the base having a flat upper surface with a recess therein, said receptacle being exposed at said upper surface, a casing mounted on said base, said casing having a C-shaped laminated core and a coil, a downwardly facing plug carried by said casing interfitting with said receptacle, said plug being connected to said coil, a T-shaped armature of laminated construction having a central portion within said coil and arms extending beneath the open end of said core, a resilient inlet valve seal mounted in a recess in the lower end of said armature, a poppet-type inlet valve seat in the lower portion of said base recess and connected with said inlet port, a pair of outwardly extending spring supporting tabs on the outer laminations of said armature, a pair of helical coil compression springs disposed between said tabs and the underside of said coil and urging said inlet valve seal against said seat, an exhaust valve seal carried in a recess at the upper end of said armature, an exhaust valve seat carried by the central portion of said C-shaped core, passageway means in said casing and base connecting said exhaust valve seat with said exhaust port, a passage between said working port and said base recess, and a space surrounding said armature and connecting said base recess with said exhaust valve seat, whereby said springs will normally hold said valve in its closed position with said inlet valve closed and said exhaust valve opened, energization of said coil closing said exhaust valve and opening the inlet valve.

Claim 10

In a solenoid valve, a base having an inlet port, a working port and an exhaust port extending from the sides thereof, an electrical receptacle carried by said base, the base having a flat upper surface with a recess therein, said receptacle being exposed at said upper surface, a casing mounted on said base, said casing having a C-shaped laminated core and a coil, a downwardly facing plug carried by said casing interfitting with said receptacle, said plug being connected to said coil, a T-shaped armature of laminated construction having a central portion within said coil and arms extending beneath the open end of said core, a resilient inlet valve seal mounted in a recess in the lower end of said armature, a poppet-type inlet valve seat in the lower portion of said base recess and connected with said inlet port, a pair of outwardly extending spring supporting tabs on the outer laminations of said armature, a pair of helical coil compression springs disposed between said tabs and the underside of said coil and urging said inlet valve seal against said seat, an exhaust valve seal carried in a recess at the upper end of said armature, an exhaust valve seat carried by the central portion of said C-shaped core, passageway means in said casing and base connecting said exhaust valve seat with said exhaust port, a passage between said working port and said base recess, and a space surrounding said armature and connecting said base recess with said exhaust valve seat, whereby said springs will normally hold said valve in its closed position with said inlet valve closed and said exhaust valve opened, energization of said coil closing said exhaust valve and opening the inlet valve.

Claim 11

The combination according to claim 7, further provided with a cylindrical manual actuator rotatably mounted in an aperture of said base and having a flattened portion engageable with one of said tabs in response to rotation of the actuator to thereby lift said armature and move the valve to its open position.