DEVICE FOR RAISING/REDUCING FLUID PRESSURE AND WORK MACHINE

Title:

DEVICE FOR RAISING/REDUCING FLUID PRESSURE AND WORK MACHINE

Document Type and Number:

WIPO Patent Application WO/2013/140879

Kind Code:

A1

Abstract:

A machine for raising/reducing hydraulic pressure (100) capable of continuously supplying an output pressure is provided with: at least one input-pressure chamber to which is applied an input pressure from a head-side pressure chamber (1H) and a rod-side pressure chamber (1R) in a hydraulic cylinder (1), and a head-side pressure chamber (2H) and a rod-side pressure chamber (2R) in a hydraulic cylinder (2); a controller (5) for switchably selecting between at least one output-pressure chamber in which there is generated an output pressure including a pressure higher than an input pressure and a pressure lower than an input pressure; and flow-control valves (6H), (6R), (7H), (7R) that create an interconnection between the input-pressure chamber and a supply resource (SR), and between the output-pressure chamber and a supply destination (SD).

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Inventors:

TSUKANE KOICHIRO (JP)

Application Number:

PCT/JP2013/052728

Publication Date:

September 26, 2013

Filing Date:

February 06, 2013

Export Citation:

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Assignee:

SUMITOMO HEAVY INDUSTRIES (JP)

International Classes:

F04B5/00; F04B1/18; F04B5/02; F04B9/10; F15B3/00

Foreign References:

JPH0524480Y2	1993-06-22
JP3628365B2	2005-03-09
JP4659310B2	2011-03-30
JP2004278207A	2004-10-07

Other References: