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. 06, 2022
Filed:
Sep. 19, 2018
Applicant:
Sumitomo(s.h.i.) Construction Machinery Co., Ltd., Tokyo, JP;
Inventor:
Youji Misaki, Chiba, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B 11/16 (2006.01);
U.S. Cl.
CPC ...
F15B 11/162 (2013.01);
Abstract
An excavator includes a hydraulic actuator driven by hydraulic oil discharged from a main pump to move a work element; a first control valve disposed in a center bypass pipeline; a second control valve disposed in a parallel pipeline; and a control device for controlling the movement of the second control valve. The first control valve and the second control valve are formed in a valve block of control valves, and the second control valve is disposed upstream of the first control valve.