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:
May. 10, 2016
Filed:
Sep. 14, 2011
Megumu Tsuruta, Tokyo, JP;
Keiji Ito, Tokyo, JP;
Takuya Nakada, Tokyo, JP;
MITSUBISHI NICHIYU FORKLIFT CO., LTD., Kyoto, JP;
Abstract
A forklift () according to the present invention includes: an engine (); a hydraulically-operated device for cargo handling (); a pump for cargo handling () that is driven by the engine (); hydraulic piping for cargo handling () that connects the pump for cargo handling () and the hydraulically-operated device for cargo handling (); discharge piping () that branches from the hydraulic piping for cargo handling () and is connected to a tank (); a switching valve () capable of switching the opening and closing of the discharge piping (); a control device () that closes the discharge piping () when the rotation speed of the engine () is larger than a predetermined value, and opens the discharge piping () when the rotation speed of the engine () is less than or equal to a predetermined value; and a sub-relief valve () that adjusts the flow rate of hydraulic oil that is discharged from the discharge piping () to the tank (), on the bases of the pressure or the flow rate of the hydraulic oil.