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:
Nov. 10, 2009
Filed:
Sep. 25, 2007
Cynthia A. Tawaf, Rochester, NY (US);
Andrew J. Lipinski, Wiesbaden, DE;
William D. Bauman, Dorr, MI (US);
Carl R. Kangas, Sand Lake, MI (US);
Albert C. Stone, Grandville, MI (US);
Eric G. Wilusz, Rush, NY (US);
Hermes Fernandez, Pittsford, NY (US);
Nick J. Hendriksma, Grand Rapids, MI (US);
Cynthia A. Tawaf, Rochester, NY (US);
Andrew J. Lipinski, Wiesbaden, DE;
William D. Bauman, Dorr, MI (US);
Carl R. Kangas, Sand Lake, MI (US);
Albert C. Stone, Grandville, MI (US);
Eric G. Wilusz, Rush, NY (US);
Hermes Fernandez, Pittsford, NY (US);
Nick J. Hendriksma, Grand Rapids, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A two-step roller finger follower having a high-lift follower portion that pivots on a pivot shaft disposed on a low-lift follower portion, and having a lost-motion spring disposed between the high-lift follower and the low-lift follower to bias the high-lift follower toward the high lift cam lobe. Various bearing cups and roller shaft sleeve embodiments are shown, all of which allow for improved shaft and needle bearing arrangements. A z-stop formed by the bearing cups and/or the shaft sleeve limits the range of travel of the high-lift follower with respect to the low-lift follower. Various z-stop embodiments are provided including a non-contacting roller shaft sleeve that grounds the high-lift follower to the low-lift follower independent of the roller shaft.