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:
Apr. 16, 2013
Filed:
Jun. 03, 2008
Keiji Matsumoto, Osaka, JP;
Jun Terashima, Osaka, JP;
Keiji Matsumoto, Osaka, JP;
Jun Terashima, Osaka, JP;
Yanmar Co., Ltd., Osaka, JP;
Abstract
The purpose of the present invention is to provide a work vehicle that does not slip. The work vehicle has an engine () generating a rotational power, a hydraulic stepless transmission (HST) () having a hydraulic pump () and a hydraulic motor () and changing the speed of rotation generated by the engine () and transmitting it to drive wheels (), an actuator () for adjusting the transmission ratio of the HST () by changing the tilt angle of a movable swash plate () of the hydraulic pump (), a shift lever (speed setting means) () for setting the speed of a motor output shaft () changed by the HST (), and a control device () for controlling operation of the actuator () so that the speed of the motor output shaft () changed by the HST () changes at a predetermined rate of change (β) until it reaches the speed (preset speed) set by the shift lever ().