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:
Nov. 25, 2008
Filed:
Apr. 01, 2005
Hideyuki Seiyama, Oyama, JP;
Taisei Okubo, Oyama, JP;
Kouichi Okaya, Oyama, JP;
Tatsuya Iwazaki, Oyama, JP;
Hiroshi Tsuda, Oyama, JP;
Hideyuki Seiyama, Oyama, JP;
Taisei Okubo, Oyama, JP;
Kouichi Okaya, Oyama, JP;
Tatsuya Iwazaki, Oyama, JP;
Hiroshi Tsuda, Oyama, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A valve device includes a valve housing body having a passage for fluid, a valve guide formed in the valve housing body, a valve stem sliding in the valve guide for opening and closing the valve, a hydraulic actuator for opening and closing a valve, and a hydraulic control valve for controlling the hydraulic actuator, in which a scraper is provided on an end of the passage side of the valve guide for scraping the deposits on the valve stem. Further, the hydraulic actuator and the hydraulic control valve are integrated with the valve housing body. Furthermore, the device is provided with a nozzle oriented toward the valve guide and having an orifice for jetting pressured oil for cooling.