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:
Aug. 22, 2000
Filed:
Aug. 13, 1999
Jeffrey Michael Polidan, Fenton, MI (US);
David C Shaw, Southgate, MI (US);
Phillip D Hamelin, Warren, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A check valve assembly for an internal combustion engine includes a cup-shaped check valve housing having a cylindrical wall, an open end, and an upstream closed end, to define a chamber. An inlet passage extends through the closed end to introduce flow to the chamber. A filter assembly is received in the chamber, adjacent the upstream closed end of the check valve housing. A valve seat member is received in the chamber, downstream of the filter assembly, and has an annular ring slidingly received in the cylindrical wall and a valve seat extending radially inward from the annular ring with a central opening. A circular valve disk is oriented in the chamber, downstream of the valve seat member, and operates to close the central opening to prevent flow upstream through the check valve assembly and to flex allowing flow downstream through the central opening. A check valve cap is partially received within the housing to mate with the annular ring of the valve seat member and has a radial flange extending about an outer circumference. The flange provides a seating shoulder for the open end of the check valve housing. A weld seam is provided between the flange of the cap and the open end of the check valve housing such that the weld seam is located at a downstream end of the check valve assembly and the filter assembly is located at the upstream closed end to reduce the risk of distortion of the filter during welding.