US Patent No: 6,105,379

Number of patents in Portfolio can not be more than 2000

Self-adjusting valve

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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, TX15

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Alsenz, Richard H 1545 Industrial Dr., Missouri City, TX 77489 46 893
Ansted, Roger C Houston, TX 3 45
Bryson, Barry Waller, TX 1 5
Johnson, Jeffrey W Sterling, VA 25 290
Malone, Paul Long Beach, CA 5 10
Rose, Collin A Houston, TX 1 5

Cited Art Landscape

Patent Info (Count) # Cites Year
 
DANFOSS A/S (2)
4,475,686 Valve for liquid injection into a refrigerant evaporator 22 1983
5,396,780 Refrigeration system and method of controlling a refrigeration system 16 1993
 
HITACHI, LTD. (2)
4,500,035 Expansion valve 9 1983
4,625,524 Air-cooled heat pump type refrigerating apparatus 20 1985
 
CHEMICAL BANK, AS COLLATERAL AGENT (1)
4,688,390 Refrigerant control for multiple heat exchangers 23 1986
 
Cooltronic B.V., Abbinksweg (1)
5,148,978 Cooling machine and an optimalized thermostatic expansion valve therefor 10 1991
 
FUJIKOKI CORPORATION (1)
5,361,597 Thermostatic expansion valve 21 1994
 
Nippondenso Co., Ltd. (1)
5,588,590 Expansion valve combined with a solenoid valve 14 1994
 
SANDEN CORPORATION (1)
4,840,038 Control device for use in a refrigeration circuit 10 1987
 
TYLER REFRIGERATION CORPORATION (1)
4,437,317 Head pressure maintenance for gas defrost 36 1982
 
Other [Check patent profile for assignment information] (1)
4,651,535 Pulse controlled solenoid valve 44 1984

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
EARTHLINKED TECHNOLOGIES, INC. (1)
7,987,681 Refrigerant fluid flow control device and method 1 2006
 
PANASONIC CORPORATION (1)
6,684,659 Refrigerator and defrosting heater 0 2001
 
STARGATE INTERNATIONAL, INC. (1)
7,234,313 HVAC monitor and superheat calculator system 3 2004
 
TGK CO., LTD. (1)
6,612,503 Expansion valve 4 2002
 
Other [Check patent profile for assignment information] (1)
8,196,420 Expansion valve control for enhancing refrigerator efficiency 0 2006