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:
Aug. 30, 2005
Filed:
Jul. 21, 2003
Sohei Honda, Saitama, JP;
Yoshikazu Sato, Saitama, JP;
Sohei Honda, Saitama, JP;
Yoshikazu Sato, Saitama, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A lubricating system for a 4-cycle engine reduces overall engine size and number of parts, and simplifies engine structure. The engine includes a side cover bonded to the crankcase defining a first valve-operating chamber, and a head cover bonded to the cylinder block defining a second valve-operating chamber. Oil reservoir chambers are formed in the crankcase and the side cover. Oil supply passages are provided in the crankshaft to permit a portion of each oil reservoir chamber below an oil surface therein to communicate with the crank chamber so that the oil passed through the oil supply passages is scattered by rotation of the crankshaft to produce an oil mist. The crank chamber communicates with the first valve-operating chamber through a one-way valve. A recovery bore opens into the second valve-operating chamber for recovering oil and communicates with each of the oil reservoir chambers above the oil surface.