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:
Oct. 01, 2002
Filed:
Jul. 11, 2001
Paul J. Troxler, Brookfield, WI (US);
Jesse Dees, Slinger, WI (US);
Harley-Davidson Motor Company Group, Inc., Milwaukee, WI (US);
Abstract
A motorcycle engine includes a crankcase, a cam chest, and a separating wall between the crankcase and cam chest. An opening is defined in the wall and communicates between the cam chest and crankcase. A valve assembly, which is preferably a reed valve assembly, covers the opening and permits one-way flow of air from the crankcase into the cam chest in response to pressure differentials caused by reciprocation of the engine's pistons. The air is then forced into the engine's rocker boxes through the engine's pushrod tubes and forces oil in the rocker boxes to return to the crankcase through narrow oil drainback passages.