Michael P Lamothe

US Patent:

57882134, Aug 4, 1998

Filed:

Nov 20, 1996

Appl. No.:

8/754594

Inventors:

Robert J. Kanda - Lake Orion MI
Michael A. LaMothe - Commerce MI

Assignee:

Lectron Products, Inc. - Rochester Hills MI

International Classification:

F16K 3106

US Classification:

25112915

Abstract:

A low voltage solenoid operated pressure control valve having a valve body with an adjustable inlet orifice plug in one end with a valve seat formed around the orifice. The orifice communicates with a precision valving bore with a one-piece valve rod having a valving surface on the end for throttling flow over the valve seat. An annular magnetic armature is press fitted on the end of the valve rod extending externally off the valving bore. A nonmagnetic cover is disposed and sealed over the armature to enclose the valving bore. An encapsulated coil is disposed over the cover. A cylindrical pole casing is disposed over the coil and a flanged tubular pole member disposed over the cover and registered on the casing to provide a flux loop about the coil. A retaining ring frictionally engages the cover to retain the assembly. The valving bore is cross ported through the body to provide the flow outlet and the interior of the armature cover is ported to the outlet.

US Patent:

56071370, Mar 4, 1997

Filed:

Sep 8, 1995

Appl. No.:

8/525258

Inventors:

Robert J. Kanda - Lake Orion MI
Michael A. LaMothe - Commerce MI

Assignee:

Eaton Corporation - Cleveland OH

International Classification:

F16K 3106

US Classification:

25112907

Abstract:

A balanced pressure spool valve has a collector groove formed on the periphery of the valving spool adjacent the valving land, with an annular armature attached to the spool. The collector groove has a radially extending bleed hole which communicates with the axially extending pressure equalization bore in the spool. A solenoid coil upon increased current flow electromagnetically acts on the armature to progressively move the spool and the valving land closes outlet ports formed in the valving bore in which the spool is received. The collector groove intersects the outlet ports to provide bleed flow as the ports are closed by the valving land, thus attenuating the effect of any pressure force imbalance created by the increased flow velocity as the outlet ports are closed.