Self-adjusting valve

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6105379
SERIAL NO

08818704

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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The present invention discloses an automatic self-adjusting thermally powered expansion valve for controlling the flow of refrigerant to an evaporator of a refrigeration system. The valve includes a differential fluid amplifier transducer which produces a constant flow of refrigerant independent of the liquid line pressure and includes a generally cylindrical interior with an inlet chamber having an inlet port and an outlet chamber having an outlet port and an orifice between the chambers providing a passage for the flow of refrigerant through the valve. The flow of refrigerant through the valve is regulated by a valve element, which moves longitudinally within the chambers with respect to the orifice. The longitudinal position of the valve element is controlled by force generators and sensors. The position of the valve element depends on the fluid pressure and the size of the pressure disks, and the spring constant of the compression spring. As the temperature at the sensors increases, so to does the pressure force on the pressure disks.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ALTECH CONTROLS CORPORATIONMISSOURI CITY, TX2

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Alsenz, Richard H Houston, TX 44 1147
Ansted, Roger C Houston, TX 3 47
Bryson, Barry Waller, TX 1 6
Johnson, Jeffrey W Sugarland, TX 20 355
Malone, Paul Houston, TX 4 14
Rose, Collin A Houston, TX 1 6

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
* 4651535 Pulse controlled solenoid valve 45 1984
 
Cooltronic B.V., Abbinksweg (1)
* 5148978 Cooling machine and an optimalized thermostatic expansion valve therefor 10 1991
 
Nippondenso Co., Ltd. (1)
* 5588590 Expansion valve combined with a solenoid valve 14 1994
 
CHEMICAL BANK, AS COLLATERAL AGENT (1)
* 4688390 Refrigerant control for multiple heat exchangers 24 1986
 
DANFOSS A/S (2)
* 4475686 Valve for liquid injection into a refrigerant evaporator 22 1983
* 5396780 Refrigeration system and method of controlling a refrigeration system 16 1993
 
TYLER REFRIGERATION CORPORATION (1)
* 4437317 Head pressure maintenance for gas defrost 38 1982
 
FUJIKOKI CORPORATION (1)
* 5361597 Thermostatic expansion valve 21 1994
 
HITACHI, LTD. (2)
* 4500035 Expansion valve 9 1983
* 4625524 Air-cooled heat pump type refrigerating apparatus 21 1985
 
SANDEN CORPORATION (1)
* 4840038 Control device for use in a refrigeration circuit 10 1987
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (3)
* 8196420 Expansion valve control for enhancing refrigerator efficiency 0 2006
* 2009/0314,014 DEVICE AND METHOD FOR CONTROLLING COOLING SYSTEMS 0 2006
* 2008/0271,794 Automated mechanical constant flow valve for air ducts 0 2008
 
TGK CO., LTD. (1)
* 6612503 Expansion valve 4 2002
 
XDX GLOBAL LLC (1)
9127870 Surged vapor compression heat transfer systems with reduced defrost requirements 0 2010
 
PANASONIC CORPORATION (1)
* 6684659 Refrigerator and defrosting heater 0 2001
 
STARGATE INTERNATIONAL, INC. (2)
* 7234313 HVAC monitor and superheat calculator system 16 2004
* 2006/0090,484 HVAC monitor and superheat calculator system 0 2004
 
Earthlinked Technologies, Inc. (1)
7987681 Refrigerant fluid flow control device and method 1 2006
 
DANFOSS A/S (1)
* 2010/0320,278 EXPANSION VALVE 0 2008
* Cited By Examiner