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:
Jul. 27, 1993
Filed:
Nov. 17, 1992
Daniel G Gauthier, E. Lansing, MI (US);
Donald G Engel, Rochester, NY (US);
John J Krieg, Spencerport, NY (US);
Michael J Warden, Rochester, NY (US);
Werner Herrmann, Pittsford, NY (US);
Richard K Donoghue, Rochester, NY (US);
Gary J De Angelis, Spencerport, NY (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A direct acting hydraulic valve lifter features in a preferred embodiment a follower assembled with a thin wall metal shell and a light plastic baffle to support a lash adjusting hydraulic element assembly. An inlet riser chamber has sufficient cross section to minimize oil flow restriction in cold oil conditions. Dead space between the shell and baffle is filled with a strong lightweight foam to support and retain the baffle and displace oil for low mass.