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:
Dec. 26, 2023
Filed:
Mar. 26, 2019
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Hitachi Construction Machinery Tierra Co., Ltd., Koka, JP;
Kenichiro Nakatani, Kusatsu, JP;
Shinya Imura, Toride, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
In a hydraulic excavator including a track structure, a swing structure swingably disposed on an upper portion of the track structure, a work implement coupled to the swing structure, an earth removal device including a blade coupled to the track structure and a lift cylinder configured to raise and lower the blade, an operation sensor configured to detect an operation of a travelling lever, a height sensor configured to measure a height of the blade with respect to the track structure, an antenna for a satellite positioning system, the antenna being mounted on the swing structure, and a controller configured to calculate positional data regarding the blade, the controller is configured to determine a travelling operation on the basis of a signal of the operation sensor, calculate a travelling direction of straight forward travelling of the track structure as an orientation of the track structure when the straight forward travelling of the track structure is detected from a trajectory of the antenna with a state in which no turn travelling operation is being performed as a precondition, calculate horizontal coordinates of the blade on the basis of the orientation of the track structure, and calculate the height of the blade on the basis of a position of the antenna and a measured value of the height sensor.