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:
Jan. 27, 2004
Filed:
Jan. 14, 2002
David Killion, Clarkston, MI (US);
Allen Hale, Plymouth, MI (US);
Metaldyne Machining and Assembly Company, Inc., Plymouth, MI (US);
Abstract
A static unbalance-type balance shaft for canceling unbalance forces of an engine includes a principal bearing journal located adjacent a first end of the shaft and an outrigger bearing journal located adjacent the second end of the shaft. A first counterweight is positioned adjacent one side of the principal journal and a second counterweight is positioned on the other side of the principal journal. The balance shaft has a small third outrigger counterweight or other source of unbalance positioned adjacent the outrigger journal for maintenance of the shaft's Effective Plane of Static Unbalance within the length of the principal journal while allowing the composite center of gravity of the first and second counterweights to be shifted away from the outrigger unbalance, for the purpose of improving the stability of shaft operating shape at the outrigger journal end of the shaft across the entire range of operating speeds.