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Class Information
Number: 137/59
Name: Fluid handling > Freeze condition responsive safety systems
Description: Apparatus which includes means which senses the existence of conditions which would cause the freezing of liquid within the system and in response thereto exercises a control to protect the liquid from freezing or to safeguard the system as a whole from the effects of freezing of a part thereof.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7267898 |
Freeze prevention of a fuel cell power plant |
Sep. 11, 2007 |
| 7093608 |
Vacuum pressure breaker and freeze protection for a water flushing system |
Aug. 22, 2006 |
| 6981848 |
Methanol injection system and method to prevent freezing of a natural gas pipeline |
Jan. 3, 2006 |
| 6892746 |
Method and system for controlling a household water supply incorporating motion-sensing for determining whether a house is occupied |
May. 17, 2005 |
| 6886580 |
Frost proof valve |
May. 3, 2005 |
| 6830062 |
Spigot freeze dripper |
Dec. 14, 2004 |
| 6830063 |
Freezeless protection device for wall hydrants/faucets |
Dec. 14, 2004 |
| 6805154 |
Freeze protection device for wall hydrants/faucets |
Oct. 19, 2004 |
| 6782908 |
Automotive washer system utilizing a freezable washer liquid and a freeze-resistant washer liquid |
Aug. 31, 2004 |
| 6769446 |
Freeze protection device for wall hydrants/faucets |
Aug. 3, 2004 |
| 6722386 |
Flow control apparatus and method |
Apr. 20, 2004 |
| 6691724 |
Method and system for controlling a household water supply |
Feb. 17, 2004 |
| 6622930 |
Freeze protection for hot water systems |
Sep. 23, 2003 |
| 6536458 |
Device for heating a tap |
Mar. 25, 2003 |
| 6532986 |
Freeze protection device for wall hydrants/faucets |
Mar. 18, 2003 |
| 6427712 |
Ambient temperature shape memory alloy actuator |
Aug. 6, 2002 |
| 6158455 |
Antifreeze cap for faucet |
Dec. 12, 2000 |
| 6142172 |
Freeze protection device for wall hydrants/faucets |
Nov. 7, 2000 |
| 6058970 |
Refueling vapor recovery system with differential pressure valve |
May. 9, 2000 |
| 6021798 |
Apparatus for preventing freezing of interior water pipes |
Feb. 8, 2000 |
| 5785073 |
Pipe burst protection pressure relief apparatus for sliding plate plumbing fixtures |
Jul. 28, 1998 |
| 5785072 |
Compressed stopper channel bypass pipe burst pressure relief apparatus for plumbing fixtures |
Jul. 28, 1998 |
| 5746240 |
Freeze protection system for car washer units |
May. 5, 1998 |
| 5730168 |
Pipe burst protection pressure relief apparatus for plumbing fixtures |
Mar. 24, 1998 |
| 5655561 |
Wireless system for detecting and stopping water leaks |
Aug. 12, 1997 |
| 5553636 |
Watering through fill valve control |
Sep. 10, 1996 |
| 5551473 |
Thermal expansion relief valve |
Sep. 3, 1996 |
| 5488968 |
Fluidizing system and method |
Feb. 6, 1996 |
| 5361795 |
Furnace waste water freeze protection method |
Nov. 8, 1994 |
| 5318059 |
Methods and apparatus for prevention of water pipe freeze-up in a dwelling |
Jun. 7, 1994 |
| 5299592 |
High pressure relief system |
Apr. 5, 1994 |
| 5240179 |
Anti-freeze assist apparatus |
Aug. 31, 1993 |
| 5226448 |
Freeze safety box organization |
Jul. 13, 1993 |
| 5123262 |
Cold transfer method and device |
Jun. 23, 1992 |
| 5074282 |
Solar water heater |
Dec. 24, 1991 |
| 5060481 |
Method and apparatus for controlling a cryogenic refrigeration system |
Oct. 29, 1991 |
| 5055185 |
Anti-freeze separator assembly |
Oct. 8, 1991 |
| 5014731 |
Method for preventing freezing in pipes, and a piping system for carrying out the method |
May. 14, 1991 |
| 4928754 |
Heat exchanging apparatus |
May. 29, 1990 |
| 4800371 |
Freeze alarm |
Jan. 24, 1989 |
| 4776362 |
Relief valve for fluid line |
Oct. 11, 1988 |
| 4755112 |
Water/air pumping system |
Jul. 5, 1988 |
| 4751495 |
Analog pulsed heat trace monitor or the like |
Jun. 14, 1988 |
| 4699321 |
Sprinkler head drain valve |
Oct. 13, 1987 |
| 4693091 |
Condensate disposal system |
Sep. 15, 1987 |
| 4674904 |
Applicator brush for self service car wash |
Jun. 23, 1987 |
| 4672990 |
System for freeze protection of pipes |
Jun. 16, 1987 |
| 4649959 |
Antiburst system for water lines |
Mar. 17, 1987 |
| 4588000 |
Method and apparatus for metering and dispensing volatile liquids |
May. 13, 1986 |
| 4573489 |
Dump valve |
Mar. 4, 1986 |
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