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:
Apr. 05, 2022
Filed:
Sep. 19, 2018
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Tomohiro Ueda, Akashi, JP;
Masaki Yoshikawa, Kasama, JP;
Takashi Ishii, Tsukuba, JP;
Takayoshi Murahashi, Toride, JP;
Masakazu Kaitou, Tsuchiura, JP;
Koji Shimazaki, Akashi, JP;
Isamu Aoki, Tsukuba, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
In an unloaded state of the bucket (), a control device () calculates an unloaded moment (M) around a hinge pin G from the pressure of the lift arm cylinder that is detected by pressure sensors (), the angle of a lift arm that is detected by a lift arm angle sensor, and dimension data extracted from a vehicle body information database (). In a loaded state of the bucket, the control device calculates a loaded moment (M) around the hinge pin G from the pressure of the lift arm cylinder, the angle of the lift arm, and the dimension data extracted from the vehicle body information database. The control device calculates the load (W) on the bucket by dividing the difference between the unloaded moment and the loaded moment by the horizontal distance (L) between the hinge pin and the gravity center position of the bucket.