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. 05, 2005
Filed:
Mar. 19, 2003
Yasunobu Nakatani, Sakai, JP;
Yasunobu Nakatani, Sakai, JP;
Kubota Corporation, Osaka, JP;
Abstract
A hydrostatic continuously variable transmission device includes: a variable displacement type hydraulic pump; a variable displacement type first hydraulic motor operated by a hydraulic oil from the hydraulic pump; a fixed displacement type second hydraulic motor operated by the hydraulic oil from the hydraulic pump; a parallel circuit for continuously connecting hydraulic oil input ports of the first and second hydraulic motors and continuously connecting oil drain ports of the first and second hydraulic motors; and an output confluence mechanism for allowing a rotational output of the first hydraulic motor and a rotational output of the second hydraulic motor to interflow. Switching is selectively made between a first speed state in which a cam plate angle of the variable displacement type first hydraulic motor is equal with a cam plate angle of the fixed displacement type second hydraulic motor and a second speed state in which the cam plate angle of the variable displacement type first hydraulic motor is zero.