Expansion valve and method for controlling it

United States of America Patent

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Feb 10, 2009
Grant Date
Sep 15, 2005
app pub date
Mar 3, 2005
filing date
Mar 3, 2004

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Expired

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Abstract

The invention relates to an expansion valve and to a method for controlling an expansion valve, in which the opening and closing movement of the valve-closure member is set as a function of the pressure difference which is present in a feed opening on the high pressure side and in a discharge opening.

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Patent Owner	Address
OTTO EGELHOF GMBH & CO KG REGELUNGSTECHNIK	STUTTGARTER STRASSE 60 FELLBACH 70736

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Inventor Name	Address	# of filed Patents	Total Citations
Kummerow, Klaus	Fellbach, DE	3	10
Robin, Jean-Jacques	Berglen, DE	14	34
Winterstein, Ralf	Dettingen/Erms, DE	8	16

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Expansion valve and method for controlling it

Number of patents in Portfolio can not be more than 2000

United States of America Patent

11072993

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PATENT NO	7487647
APP PUB NO	20050198979A1
SERIAL NO	11072993
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
February 10, 2009	US,7487647,B2 US7487647B2	GRANTED PATENT AS SECOND PUBLICATION
September 15, 2005	US,20050198979,A1 US20050198979A1	FIRST PUBLISHED PATENT APPLICATION

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11072993

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