04774976 is referenced by 30 patents and cites 5 patents.

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.

Title
Modulating hydraulic pressure control valve and assembly method therefor
Application Number
7/100330
Publication Number
4774976
Application Date
September 23, 1987
Publication Date
October 4, 1988
Inventor
Ronald C Koltz
Hartland
WI, US
James P Janecke
Waukesha
WI, US
Agent
Fred Wiviott
C Thomas Sylke
John C Cooper III
Assignee
Applied Power
WI, US
IPC
G05D 16/00
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