Device for prevention of backward operation of scroll compressors

United States of America Patent

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May 23, 2006
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Feb 22, 2005
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Mar 21, 2002

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Abstract

A method and apparatus which provides a pressure sensor and/or temperature sensor connected to the low pressure side of a refrigeration system, or the discharge line of a scroll compressor. When the scroll compressor rotates backward, the change of pressure or temperature immediately sends a signal to work with a time-delay relay and a normally closed relay to immediately cut off the electrical power supply to the compressor. Thus, causing the scroll compressor to stop rotating in the undesirable direction.

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Patent Owner(s)

Patent Owner	Address
KENDRO LABORATORY PRODUCTS INC	275 AIKEN ROAD ASHEVILLE NC 28804

International Classification(s)

F04B:POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Weng, Chuan	Weaverville, NC	19	126
# of filed Patents : 19 Total Citations : 126

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Device for prevention of backward operation of scroll compressors

Number of patents in Portfolio can not be more than 2000

United States of America Patent

11061776

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Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
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DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
May 23, 2006	US,7048511,B2 US7048511B2	GRANTED PATENT AS SECOND PUBLICATION
July 07, 2005	US,20050147499,A1 US20050147499A1	FIRST PUBLISHED PATENT APPLICATION

PATENT NO	7048511
SERIAL NO	11061776
DOCKET NO

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11061776

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