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:
May. 10, 2016
Filed:
Jul. 08, 2011
Fumitoshi Ishino, Osaka, JP;
Takeshi Ouchida, Osaka, JP;
Terunobu Yoshioka, Osaka, JP;
Koji Iwaki, Hyogo, JP;
Fumitoshi Ishino, Osaka, JP;
Takeshi Ouchida, Osaka, JP;
Terunobu Yoshioka, Osaka, JP;
Koji Iwaki, Hyogo, JP;
YANMAR CO., LTD., , JP;
Abstract
An input pulley, an output pulley, a belt wound across the pulleys, a hydraulic cylinder provided to the input pulley, and a hydraulic servo mechanism that controls an operation of the hydraulic cylinder are provided. The hydraulic servo mechanism includes: a valve chest facing an input side movable sheave; a servo spool slidably inserted in the valve chest, and switches an oil passage in communication with a hydraulic chamber of the hydraulic cylinder; and a feedback spool disposed in such a manner that one end comes into contact with the input side movable sheave a bearing disposed in between, and configured to switch the oil passage to maintain a slid position of the input side movable sheave at a position corresponding to a slid position of the servo spool.