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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.:

US 10094092 B1

PDFFull Text
Date of Patent:
Oct. 09, 2018

Filed:

Oct. 31, 2013

Hydraulic circuit for construction machinery having floating function and method for controlling floating function

Applicant:

Volvo Construction Equipment Ab, Eskilstuna, SE;

Inventors:

Hea-Gyoon Joung, Busan, KR;

Sung-Gon Kim, Changwon-si, KR;

Assignee:

VOLVO CONSTRUCTION EQUIPMENT AB, Eskilstuna, SE;

Attorney:

Harness, Dickey & Pierce, P.L.C.

Primary Examiner:

F Daniel Lopez

Assistant Examiner:

Matthew Wiblin

Int. Cl.
CPC ...
F15B 13/02 (2006.01); E02F 9/22 (2006.01); F15B 11/17 (2006.01); F15B 11/10 (2006.01);
U.S. Cl.
CPC ...
E02F 9/2207 (2013.01); E02F 9/2228 (2013.01); E02F 9/2242 (2013.01); E02F 9/2282 (2013.01); E02F 9/2285 (2013.01); E02F 9/2292 (2013.01); F15B 11/10 (2013.01); F15B 11/17 (2013.01); F15B 13/021 (2013.01); F15B 2211/20576 (2013.01); F15B 2211/30565 (2013.01); F15B 2211/3127 (2013.01); F15B 2211/31582 (2013.01); F15B 2211/6313 (2013.01); F15B 2211/6316 (2013.01); F15B 2211/665 (2013.01);
Abstract

A hydraulic circuit for construction machinery having a floating function, according to the present invention, is provided with: two or more hydraulic pumps; a hydraulic cylinder connected to the hydraulic pumps; a boom driving control valve provided on the flow path between the hydraulic pump on one side and the hydraulic cylinder; a boom confluence control valve provided on the flow path between the hydraulic pump on the other side and the hydraulic cylinder; an operating lever; a first sensor for measuring the hydraulic fluid pressure of a large chamber of the hydraulic cylinder; a second sensor for measuring the boom lowering pilot pressure applied to one end of the boom driving control valve; a control valve provided on the flow path between the operating lever and the other ends of the boom driving control valve and the boom confluence control valve.

Find Patent Forward Citations

Joung, Hea-Gyoon. (2018). Hydraulic circuit for construction machinery having floating function and method for controlling floating function (U.S. Patent No. 10094092). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10094092

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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