Electromagnetic reversing valve

Details Electromagnetic reversing valve Electromagnetic reversing valve

1994-07-07

1996-04-02

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

25112921, F15B 13044

Patent

active

055031854

ABSTRACT:
An electromagnetic reversing valve in which a slidable armature is supported with clearance in a housing and carries a plastic seal unit for selectively closing first and second channels in the housing upon sliding movement of the armature, the sealing unit provides a separate fluid passage establishing communication between a third channel in the housing and one of the first and second channels when it is unsealed. Since the clearance space around the slidable armature is separate and independent from the fluid passage in the seal unit, it can be made substantially narrower in dimension than the fluid passage, thereby to minimize the iron-free gap between the slidable armature and the surrounding member of the magnetic circuit. The iron-free gap is formed in part by the clearance space and in part by a portion of the housing in which the magnetic circuit member is embedded. In a particular embodiment, the seal unit is formed by a central part joined to an outer part by radial, circumferentially spaced ribs defining the fluid passage.

REFERENCES:
patent: 3529620 (1970-09-01), Leiber
patent: 3817491 (1974-06-01), Burckhardt et al.
patent: 3921666 (1975-11-01), Leiber
patent: 3983909 (1976-10-01), Anglade
patent: 3989063 (1976-11-01), Brouwers et al.
patent: 4211257 (1980-07-01), Sakakibara et al.
patent: 4326696 (1982-04-01), Ishikawa et al.
patent: 4944331 (1990-07-01), Tackett

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