Gm Global Technolgoy Operations, Inc.

Michael C Lewman

William J Chafin

David M Kroll

Viswanath Seetharaman

Dale Lee Baldauf

Hayse William Warrum, Jr

Kris Renee Stark

Stephen L Hardin

A proportional pressure control solenoid valve includes a valve spool with dual feedback pins slidable relative to the spool within a common bore of the spool as the spool moves. The feedback pins have unequal cross sectional areas defining an operative feedback area and enabling minimization of the valve's size in a cost efficient manner. To control output pressure as a function of control current, an electro-magnetically generated force initiates modulation of the valve with assistance from a hydraulic feedback force and in opposition to the force of modulating spring.

Proportional pressure control solenoid valve

A fluid filter for a solenoid which includes a flexible filter element and two plastic tips for installation in an annular groove. The plastic tips are arcuate shaped to fit tightly against the outside diameter of the annular groove when the flexible filter element is wrapped around the annular groove during installation and the tips are bonded together to secure the filter to the groove.

Filter for installation in an annular groove

A method of terminating a wire comprises the steps of (i) winding the wire around a an end portion of a terminal, (ii) placing a plastic sleeve having a first cavity into a second cavity in an ultrasonic horn, (iii) inserting the portion of the terminal around which the wire is wound into the first cavity of the plastic sleeve while the plastic sleeve is within the second cavity in the ultrasonic horn, (iv) activating the ultrasonic horn causing the plastic sleeve to melt and flow around the terminal and wound wire, (v) deactivating the ultrasonic horn, and (vi) removing the terminal and coil from the horn.

Thermoplastic terminal encapsulation method and apparatus

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Muncie, IN, United States of America

Michael C Lewman