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:
Jun. 18, 2002
Filed:
Mar. 16, 2001
Applicant:
Inventors:
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B 7/506 ;
U.S. Cl.
CPC ...
F02B 7/506 ;
Abstract
An internal combustion engine having a crankshaft, at least one camshaft, a balancer shaft and a timing drive for driving the camshaft and the balancer shaft from the crankshaft. The balancer shaft has a drive member that is interposed in the timing drive and a torsional vibration damper that is interposed between this drive member and the balancer masses on the balancer shaft to avoid transmission of crankshaft vibrations to the balancer shaft without effecting the valve timing. balancer shaft is provided that has at least offset balance masses formed thereon. The balancer shaft is also formed with integral bearings directly on opposite sides of each of the balance masses.