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:
Sep. 27, 2022
Filed:
Apr. 17, 2018
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
A hydraulic excavator () is provided with a controller () including an actuator control section () which, when an operation device () is operated, controls at least one of a plurality of hydraulic actuators () in accordance with the velocities of the plurality of hydraulic actuators () and a predetermined condition. The controller () determines, based on a sensed value from a posture sensor (), the direction of a load exerted on an arm cylinder () due to the weight of an arm (), outputs, upon determining that the direction of the load is opposite to a driving direction of the arm cylinder (), a second velocity Vamtto the actuator control section (), and outputs, upon determining that the direction of the load is the same as the driving direction of the arm cylinder (), a third velocity Vamtto the actuator control section ().