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. 11, 2011
Filed:
Jan. 28, 2008
Yoshifumi Nabeshima, Tsuchiura, JP;
Takashi Yagyu, Ushiku, JP;
Takashi Sasaki, Kasumigaura, JP;
Toshikazu Minoshima, Kasumigaura, JP;
Yoshifumi Nabeshima, Tsuchiura, JP;
Takashi Yagyu, Ushiku, JP;
Takashi Sasaki, Kasumigaura, JP;
Toshikazu Minoshima, Kasumigaura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
Detection signals from lever sensor (), sit-down sensor () and vehicle speed sensor () are read into a controller (). A control signal is produced by the controller () to switch a directional control valve () of a control valve unit () instantly from a floating position (c) to a neutral position (a) and to switch another directional control valve () from a neutral position (a) to a lowering position (d) when a dump truck () is in travel with the directional control valve () of the control valve unit () is switched in the floating position (c). Whereupon, a hoist cylinder () is contracted by a hydraulic pressure force to hold a vessel () in a sit-down position on a vehicle body (), thereby preventing the vessel () from shaking movements like floating up while the dump truck () is in travel.