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:
Feb. 22, 2000
Filed:
Nov. 25, 1998
Goichi Katayama, Hamamatsu, JP;
Kazuhiko Watanabe, Hamamatsu, JP;
Noriyoshi Hiraoka, Hamamatsu, JP;
Masaki Okazaki, Hamamatsu, JP;
Sanshin Kogyo Kabushiki Kaisha, Hamamatsu, JP;
Abstract
A number of embodiments of four cycle outboard motors that have water cooled engines and an oil pan that is formed in the upper portion of the drive shaft housing. An exhaust pipe collects exhaust gases from an exhaust guide and delivers to a cavity that is formed in the oil pan by an interior wall thereof In many embodiments the exhaust pipe does not terminate below the lower surface of the oil pan and several arrangements are disclosed for delivering idle exhaust gases to the area between the exterior of the exhaust pipe and the interior surface of the oil pan that defines the cavity. Various arrangements are disclosed for conveying idle exhaust gases to this area and discharging them to the atmosphere through and above the water exhaust gas discharge. These arrangements incorporate a system for precluding water from entering into the engine through its exhaust system including the idle discharge.