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:
Jul. 17, 2001
Filed:
Mar. 18, 1999
Shigemi Hidaka, Osaka, JP;
Yanmar Agricultural Equipment Co., Ltd., Osaka, JP;
Abstract
In an operation mechanism of an HST system transmission apparatus of the type in which an HST system non-stage transmission mechanism for driving and an HST system non-stage transmission mechanism for turning are disposed, the HST system non-stage transmission mechanism is operated by a transmission lever and the HST system non-stage transmission mechanism for turning is operated by a round operation wheel, a steering mechanism can make a turning operation matching turn feeling desired by an operator in turning at both low and high speeds. Namely, in the operation of the HST system transmission apparatus wherein the HST system non-stage transmission mechanism (,) for driving is operated by a transmission lever (,) and the HST system non-stage transmission mechanism (,) for turning is operated by a round operation wheel (,), a speed ratio between right and let driving devices is changed in accordance with the operation turning angle of the round operation wheel (,). The turning radius is changed, even with the same operation turning angle of the round operation wheel (,), by the difference of the operation angle of the transmission lever (,).