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:
Oct. 23, 2018
Filed:
May. 11, 2016
Kabushiki Kaisha Toyota Jidoshokki, Kariya-shi, Aichi-ken, JP;
Yuki Ueda, Aichi-ken, JP;
Naoya Yokomachi, Aichi-ken, JP;
Tsutomu Matsuo, Aichi-ken, JP;
Takashi Uno, Aichi-ken, JP;
Tetsuya Goto, Aichi-ken, JP;
Takanori Kanna, Aichi-ken, JP;
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya-shi, Aichi-ken, JP;
Abstract
A hydraulic control device of a forklift truck includes a first hydraulic cylinder, a first instruction member, a second hydraulic cylinder, a second instruction member, a hydraulic pump, an electric motor, a first passage which has a drain passage, a lowering control valve that controls flow of hydraulic oil, a flow rate control valve, and a controller. When a lowering operation of forks and an operation of a hydraulically-operated unit are performed simultaneously, when a required rotation speed of the hydraulic pump that is required for operating the hydraulically-operated unit at an instruction speed based on an operation of the second instruction member is a specified rotation speed or lower, the controller controls an instruction rotation speed of the electric motor so as to operate the hydraulic pump at the required rotation speed to thereby restrict the operation of the hydraulic pump.