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:
Jun. 15, 2021
Filed:
Sep. 08, 2017
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Shota Kimura, Tokyo, JP;
Tadashi Osaka, Tokyo, JP;
Hidekazu Moriki, Tokyo, JP;
Kazuo Ishida, Tsuchiura, JP;
Noritaka Itou, Tsuchiura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A wheel loader includes a working device, a lift cylinderwhich is a hydraulic actuator that drives the working device, a hydraulic pumpthat supplies hydraulic oil to the lift cylinder, a lift cylinder bottom pressure detectorthat detects a pressure of the lift cylinder, a control valvethat controls the amount of hydraulic oil to be supplied from the hydraulic pumpto the lift cylinder, a vehicle acceleration detectorthat detects a vehicle acceleration in a longitudinal direction, and a control device. The control devicedetermines whether the working device has started excavation, or not, based on the lift cylinder bottom pressure detected by the lift cylinder bottom pressure detectorand the vehicle acceleration detected by the vehicle acceleration detector