Electric expansion valve

Details Electric expansion valve Electric expansion valve

1994-04-14

1997-02-25

Lee, Kevin

Valves and valve actuation

Electrically actuated valve

Including solenoid

F16K 3106

Patent

active

056053185

ABSTRACT:
A solenoid operated proportional control expansion valve having a tubular armature guide of non-magnetic material disposed externally of the valve blocks with a magnetic pole piece welded on the end of the tubular guide. A plastic encapsulated coil is received over the guide. The armature guide has a flange therein which in one embodiment is welded to a second flanged tube threaded into the valve blocks. In other embodiments the guide flange is directly mechanically fastened to the valve block. A cup-shaped pole frame is received over the coil for completing the magnetic flux loop about the coil.

REFERENCES:
patent: 3707992 (1973-01-01), Ellison et al.
patent: 4074700 (1978-02-01), Engle
patent: 4546955 (1985-10-01), Beyer et al.
patent: 4683454 (1987-07-01), Vollmer et al.
patent: 4725040 (1988-02-01), Fornuto et al.
patent: 5127624 (1992-07-01), Domke

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