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. 24, 2014
Filed:
Dec. 25, 2009
Michiyasu Ishida, Kanagawa, JP;
Hideaki Okumura, Kanagawa, JP;
Michiyasu Ishida, Kanagawa, JP;
Hideaki Okumura, Kanagawa, JP;
Mitsubishi Heavey Industries, Ltd., Tokyo, JP;
Abstract
Provided is a check valve structure capable of preventing soot accumulation in a check valve arranged in a pre-combustion chamber () due to incomplete combustion of fuel gas and preventing malfunction the check valve () for a gas engine having an pre-combustion chamber with a spark plug. An arrangement for supplying fuel gas to the pre-combustion chamber () has a multiple bore-cooling holes () disposed around the spark plug () for cooling a gasket () formed in a mounting hardware piece (), the holes having an lateral bore-cooling hole (), and a lateral bore-cooling hole () with the gasket () therebetween. Each of the holes further has a multiple bore-cooling holes () parallel to the center axis () of the spark plug. The mounting hardware piece () further has a check valve () communicating with a fuel gas inlet slot () between the lateral bore-cooling hole () (inlet side) and the lateral bore-cooling hole () (outlet side) for cooling water so that the check valve is cooled. A first check valve () is provided upstream of a fuel gas inlet location (the junction) () of the mounting hardware piece () with respect to the fuel flow to prevent reversed flow of fuel gas.