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:
Feb. 01, 2005
Filed:
Aug. 29, 2003
Yasunobu Nakatani, Sakai, JP;
Yoshifumi Horiuchi, Sakai, JP;
Yasunobu Nakatani, Sakai, JP;
Yoshifumi Horiuchi, Sakai, JP;
Kubota Corporation, Osaka, JP;
Abstract
A propelling transmission control apparatus for a working vehicle having a hydrostatic stepless transmission comprises a variable displacement type hydraulic pump (), a change speed control mechanism () for converting a displacement of a control device () to a control displacement for varying a swash plate angle of the hydraulic pump, a fixed displacement main hydraulic motor () and a variable displacement auxiliary hydraulic motor () connected in series to the hydraulic pump. A common output shaft receives rotational output from both motors. A control piston () varies the swash plate angle of the auxiliary hydraulic motor, is connected to a pressure oil supply line () for supplying both hydraulic motors with pressure oil, and is operable to vary the swash plate angle of the auxiliary hydraulic motor () such that the auxiliary hydraulic motor () has an increased volume with a pressure increase applied to the control piston ().