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:
Mar. 20, 2012
Filed:
Nov. 30, 2007
Koji Hyodo, Tsuchiura, JP;
Tetsuji Tanaka, Abiko, JP;
Eiichi Sakai, Ryugasaki, JP;
Genichiro Ishimaru, Inashiki, JP;
Tomoo Takahashi, Tsuchiura, JP;
Yasuo Yamazaki, Inashiki-gun, JP;
Koji Hyodo, Tsuchiura, JP;
Tetsuji Tanaka, Abiko, JP;
Eiichi Sakai, Ryugasaki, JP;
Genichiro Ishimaru, Inashiki, JP;
Tomoo Takahashi, Tsuchiura, JP;
Yasuo Yamazaki, Inashiki-gun, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A gearshift controller for an industrial vehicle, includes: a speed ratio detection unit that detects a speed ratio of speeds of an input axis and of an output axis of a torque converter; a gearshift control unit that shifts up a speed stage when the detected speed ratio is equal to or more than a first predetermined value and shifts down the speed stage when the detected speed ratio is equal to or less than a second predetermined value, which is smaller than the first predetermined value; and an operation member with which a downshift to the first speed is instructed by operation thereof by an operator. When the downshift is instructed by the operation member, the gearshift control unit controls the speed stage to be kept at the first speed for a predetermined time period regardless of the speed ratio detected by the speed ratio detection unit.