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. 06, 2012
Filed:
Nov. 21, 2006
Shingo Eguchi, Osaka, JP;
Takeshi Ouchida, Osaka, JP;
Shuji Shiozaki, Osaka, JP;
Yanmar Co., Ltd., Osaka, JP;
Abstract
A hydraulic stepless transmission having increased layout freedom and a compact structure with the functions of conventional hydraulic stepless transmission retained and having increased easiness of production. In the hydraulic stepless transmission, the movable swash plate (input side swash plate) of a variable displacement plunger hydraulic pump or motor is tilted by a hydraulic servo mechanism. The hydraulic servo mechanism has a power piston connected to one end of the input side swash plate for tilting the swash plate, a servo spool () placed normal to the direction of sliding of the power piston and substantially parallel to the input side swash plate, and a feedback link for connecting the servo spool and the input side swash plate.