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. 08, 1985
Filed:
Mar. 14, 1984
Tomonori Suzuki, Hamamatsu, JP;
Makoto Toyohara, Shizuoka, JP;
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Abstract
A compact improved four-cycle internal combustion engine of the water-cooled type for use with an outboard motor. The engine includes an exhaust arrangement wherein the exhaust gases are returned from the cylinder head to the cylinder block in proximity to a cooling jacket for cooling the exhaust gases before delivery into the lower unit. In addition, the cooling jacket and method of casting the cylinder head provides an opening in which a sacrificial anode may be placed to protect the engine from corrosion, particularly when operated in salt water. The engine is given a compact arrangement, in part, by positioning the thermostat of the cooling system in the area between the driving and slack sides of the belt that drives the overhead camshaft. The lubricating system also includes a baffled cover plate for the camshaft that receives oil flung from the camshaft and redistributes it to the valve train for lubrication.