Negative control type hydraulic system

United States of America Patent

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May 6, 2014
Grant Date
Jun 30, 2011
app pub date
Dec 29, 2010
filing date
Dec 29, 2009

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Abstract

A negative control type hydraulic system in which the use of a pilot pump and a load pressure generator between a hydraulic pump and a control valve is not required to prevent a power loss.

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Patent Owner(s)

VOLVO CONSTRUCTION EQUIPMENT HOLDING SWEDEN AB

International Classification(s)

F16D:COUPLINGS FOR TRANSMITTING ROTATION

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[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Cheong, Hae Kyun	Busan, KR	10	69

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Negative control type hydraulic system

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United States of America Patent

12980530

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PATENT NO	8713930
APP PUB NO	20110158830A1
SERIAL NO	12980530
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
May 06, 2014	US,8713930,B2 US8713930B2	GRANTED PATENT AS SECOND PUBLICATION
June 30, 2011	US,20110158830,A1 US20110158830A1	FIRST PUBLISHED PATENT APPLICATION

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12980530

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