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Class Information
Number: 62/149
Name: Refrigeration > Automatic control > Withdrawing or adding refrigerant from or to normally closed system
Description: Apparatus which controls or responds to means adding or withdrawing refrigerant to or from a closed circuit type refrigeration system, relative to a source external of the system.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7610765 |
Refrigerant charge status indication method and device |
Nov. 3, 2009 |
| 7607311 |
Method for controlling amount of refrigerant of dual type unitary air conditioner |
Oct. 27, 2009 |
| 7607313 |
Vehicle HVAC system |
Oct. 27, 2009 |
| 7594407 |
Monitoring refrigerant in a refrigeration system |
Sep. 29, 2009 |
| 7552596 |
Dual thermochromic liquid crystal temperature sensing for refrigerant charge indication |
Jun. 30, 2009 |
| 7500368 |
System and method for verifying proper refrigerant and airflow for air conditioners and heat pumps in cooling mode |
Mar. 10, 2009 |
| 7497091 |
Refrigeration device |
Mar. 3, 2009 |
| 7493773 |
Refrigerant monitoring system and method |
Feb. 24, 2009 |
| 7478538 |
Refrigerant containment vessel with thermal inertia and method of use |
Jan. 20, 2009 |
| 7462215 |
Very thin profile filter with large filter media area |
Dec. 9, 2008 |
| 7421848 |
Automated hose clearing after refrigerant charging method |
Sep. 9, 2008 |
| 7386985 |
Detection of refrigerant charge adequacy based on multiple temperature measurements |
Jun. 17, 2008 |
| 7386987 |
Refrigerant relief device |
Jun. 17, 2008 |
| 7380404 |
Method and control for determining low refrigerant charge |
Jun. 3, 2008 |
| 7377118 |
Refrigerant tracking/leak detection system and method |
May. 27, 2008 |
| 7370483 |
Refrigerant cycle with three-way service valve for environmentally friendly refrigerant |
May. 13, 2008 |
| 7357150 |
Safety shut-off device |
Apr. 15, 2008 |
| 7343750 |
Diagnosing a loss of refrigerant charge in a refrigerant system |
Mar. 18, 2008 |
| 7337619 |
Method and system for assessing a refrigerant charge level in a vehicle air conditioning system |
Mar. 4, 2008 |
| 7310956 |
Refrigerant charging by optimum performance |
Dec. 25, 2007 |
| 7293419 |
Refrigerant transfer system and method |
Nov. 13, 2007 |
| 7254954 |
Refrigerant charging system and method using cartridges and scale |
Aug. 14, 2007 |
| 7237394 |
Charge management for 100% heat recovery units |
Jul. 3, 2007 |
| 7174742 |
Combined method and apparatus for recovering and reclaiming refrigerant, solvent flushing, and refrigerant recharging |
Feb. 13, 2007 |
| 7168256 |
Apparatus and method for recovery and recycle of optical fiber coolant gas |
Jan. 30, 2007 |
| 7159412 |
Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus |
Jan. 9, 2007 |
| 7146819 |
Method of monitoring refrigerant level |
Dec. 12, 2006 |
| 7127901 |
Helium management control system |
Oct. 31, 2006 |
| 7117688 |
Refrigeration device |
Oct. 10, 2006 |
| 7104075 |
Arrangement and method for controlling the discharge of carbon dioxide for air conditioning systems |
Sep. 12, 2006 |
| 7096679 |
Transcritical vapor compression system and method of operating including refrigerant storage tank and non-variable expansion device |
Aug. 29, 2006 |
| 7093451 |
Blowoff valve assembly with integrated pressure switch |
Aug. 22, 2006 |
| 7086238 |
Oil separator with bi-directional valve mechanism for use with a refrigerant recycling machine |
Aug. 8, 2006 |
| 7086237 |
Method and apparatus to measure and transfer liquefied refrigerant in a refrigeration system |
Aug. 8, 2006 |
| 7051547 |
Air conditioning system for a motor vehicle |
May. 30, 2006 |
| 7033508 |
Contaminant flushing device, system, and method, particularly suited for refrigeration system servicing |
Apr. 25, 2006 |
| 7021069 |
Multiple refrigerating device |
Apr. 4, 2006 |
| 7010927 |
Refrigerant system with controlled refrigerant charge amount |
Mar. 14, 2006 |
| 6996998 |
Refrigerant system pressure control for storage and transportation |
Feb. 14, 2006 |
| 6981384 |
Monitoring refrigerant charge |
Jan. 3, 2006 |
| 6981511 |
Method and apparatus for servicing a pressurized system |
Jan. 3, 2006 |
| 6978636 |
Device for measuring pressure in automobile air conditioner and charging same with refrigerant and method of same |
Dec. 27, 2005 |
| 6968706 |
HVAC system with refrigerant venting |
Nov. 29, 2005 |
| 6959557 |
Apparatus for the storage and controlled delivery of fluids |
Nov. 1, 2005 |
| 6952938 |
Purge system and method of use |
Oct. 11, 2005 |
| 6952931 |
Refrigerant monitoring system and method |
Oct. 11, 2005 |
| 6925821 |
Method for extracting carbon dioxide for use as a refrigerant in a vapor compression system |
Aug. 9, 2005 |
| 6923011 |
Multi-stage vapor compression system with intermediate pressure vessel |
Aug. 2, 2005 |
| 6912860 |
Method of operating a directed relief valve in an air conditioning system |
Jul. 5, 2005 |
| 6907748 |
HVAC system with refrigerant venting |
Jun. 21, 2005 |
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