The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 1996
Filed:
Sep. 15, 1994
Applicant:
Inventor:
Lawrence L Meyer, Northville, MI (US);
Assignee:
Eaton Corporation, Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
13762565 ; 123 9012 ; 13762568 ; 25112921 ;
Abstract
A lightweight spool valve for an engine hydraulic valve actuator having a lightweight main body with a center bore therethrough with one end plugged to balance hydraulic forces and a soft iron magnetic ring attached to the main body where the magnetic sleeve is castellated to minimize oil film stiction forces and magnetically interacts with an electrical coil which induces axial motion to control the flow of hydraulic oil within the valve actuator.