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. 06, 2022
Filed:
Apr. 19, 2021
Applicant:
Komatsu Ltd., Tokyo, JP;
Inventors:
Takuya Uemura, Tokyo, JP;
Yusuke Yamazaki, Tokyo, JP;
Assignee:
KOMATSU LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02F 9/22 (2006.01);
U.S. Cl.
CPC ...
E02F 9/2278 (2013.01);
Abstract
There is provided a work machine that can avoid an unintended movement of a blade. A crawler dozer includes a controller. The controller controls EPC valves. A left tilt cylinder and a right tilt cylinder are asymmetrically attached to a blade. The EPC valves control direction and flow rate of supply of hydraulic oil to the right tilt cylinder. The EPC valves control direction and flow rate of supply of the hydraulic oil to the left tilt cylinder. The controller controls the EPC valves and the EPC valves to extend or contract the left tilt cylinder and the right tilt cylinder at different rates.