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:
May. 20, 2014
Filed:
Mar. 01, 2013
Delphi Technologies, Inc., Troy, MI (US);
Thomas H. Lichti, Victor, NY (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A camshaft phaser for controllably varying the phase relationship between a crankshaft and a camshaft in an internal combustion engine is attached to the camshaft with a camshaft phaser attachment bolt. The camshaft phaser attachment bolt includes a stepped bore for communicating pressurized oil from the internal combustion engine to a valve spool and is defined by a larger diameter bore, a smaller diameter bore, and a shoulder between the larger diameter bore and the smaller diameter bore. A check valve assembly includes a check valve body axially moveable within the larger diameter bore. The check valve body includes a plurality of azimuthally spaced guiding walls, a plurality of clearance walls separating the guiding walls, and a seating surface at one end of the guiding walls and the clearance walls for selectively seating with the shoulder to prevent fluid communication between the larger diameter bore and the smaller diameter bore.