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:
Feb. 10, 2004
Filed:
Mar. 17, 2003
Kynan L. Church, Ceresco, MI (US);
John A. Ness, Birmingham, MI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A valve deactivation assembly ( ) comprises part of the valve gear train for an internal combustion engine, and is disposed in a bore ( ) defined by the A engine block ( B). The assembly ( ) includes a latching mechanism ( ) shiftable, in response to control fluid pressure, between latched and unlatched conditions. The assembly ( ) includes an outer body member ( ), having an outer cylindrical surface ( S), reciprocable within said the bore ( ), the outer body member including a lower terminal portion ( L). The outer body member defines an annular sealing groove ( ) which remains aligned within the bore ( ), between the lower terminal portion ( L) and a passage ( ) communicating control fluid pressure the latching mechanism ( ), as the outer body member reciprocates. There is also a fluid passage ( ) disposed to communicate a source ( ) of low pressure to the annular groove ( ), to thereby form a barrier to block the migration of air to the control pressure passage ( ).