Fluid handling – Processes – Involving pressure control
Patent
1987-09-23
1988-10-04
Cohan, Alan
Fluid handling
Processes
Involving pressure control
137 82, 13762415, 137 15, 25112908, G05D 1600
Patent
active
047749768
ABSTRACT:
A hydraulic pressure control valve includes a modulator-controlled solenoid assembly which selectively axially displaces a disc armature adjacent thereto. When not attracted by the solenoid, the armature is biased away from the solenoid by a wave spring. Movement of the armature opens and closes the outlet of a lower body member to a source of hydraulic fluid under pressure. The armature is improved, having dimples on the face adjacent the solenoid assembly to minimize sticking. Additionally, the center pole of the solenoid is axially adjustable and can therefore be set for different valve performance levels. Assembly of the valve is quickly accomplished using pneumatic pressure under performance conditions for adjustment of and setting the initial displacement of the disc armature. Setting is accomplished by crimping the various components in an outer tube.
REFERENCES:
patent: 3861643 (1975-01-01), Moffatt
patent: 3926405 (1975-12-01), Arnold
patent: 4108420 (1978-08-01), West
patent: 4538644 (1985-09-01), Knutson et al.
patent: 4576200 (1986-03-01), Janecke et al.
Janecke James P.
Koltz Ronald C.
Applied Power Inc.
Cohan Alan
Cooper, III John C.
Sylke C. Thomas
Wiviott Fred
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