Long stroke balanced solenoid

Details Long stroke balanced solenoid Long stroke balanced solenoid

1998-11-05

1999-09-28

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

25112921, F15B 13044, F16K 3106

Patent

active

059571616

ABSTRACT:
A solenoid operated control valve (10) including a housing (16) that defines an internal chamber (34) therein, where an electromagnetic coil (44) is coaxially mounted within the internal chamber (34). A tubular shaped movable armature (60) is positioned within the internal chamber (34). An armature spring (72) biases the armature (60) to a first position within the internal chamber (34) when the coil (44) is not energized, and the armature (60) moves to a second position against the bias of the spring (72) when the coil (44) is energized. The armature (60) contacts a first armature stop (76) when it is in the first position and contacts a second armature stop (92) when it is in the second position. Both the first and second armature stops (76, 92) include radially extended protrusions (100) in order to minimize hydraulic tension. A valve body (64) is disposed within a center bore (62) of the armature (60) and includes openings (122, 124) that align with a side aperture (106) in the armature (60) to control fluid pressure between a supply port (30), a control port (136), and an exhaust port (30).

REFERENCES:
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patent: 4503884 (1985-03-01), Spils
patent: 4810985 (1989-03-01), Mesenich
patent: 4917150 (1990-04-01), Koch et al.
patent: 4946132 (1990-08-01), Reiter
patent: 5076326 (1991-12-01), McCabe
patent: 5127624 (1992-07-01), Domke
patent: 5207410 (1993-05-01), Wakeman
patent: 5232196 (1993-08-01), Hutchings et al.
patent: 5326075 (1994-07-01), Goff
patent: 5419369 (1995-05-01), House et al.
patent: 5513832 (1996-05-01), Becker et al.

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