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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:

Class Number Class Name Patents
137/62 Low temperature responsive drains 103
137/61 Stop and waste 12
137/60 With freeze waste 22

Patents under this class:
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Patent Number Title Of Patent Date Issued
8662098 System and method of winterizing a plumbing system Mar. 4, 2014
8613290 Anti-inundation and drainage structure for a anti-freeze faucet Dec. 24, 2013
8561914 Temperature-responsive fluid flow control apparatus Oct. 22, 2013
8402984 Flood preventing system, and method of use Mar. 26, 2013
8307848 Freeze resistant manifold assembly and system Nov. 13, 2012
8260466 Modulated watering device based on watering index percentage Sep. 4, 2012
8109264 Hot water solar heating system and method Feb. 7, 2012
7954506 Automatic freeze protection system for domestic plumbing systems Jun. 7, 2011
7891370 Irrigation device with freeze member Feb. 22, 2011
7823407 Water filter and refrigerator having the same Nov. 2, 2010
7686028 Structure of straight-out controllable ceramic valve of anti-freezing faucet Mar. 30, 2010
7497228 Freeze and backflow protection for a subterranean water flushing system Mar. 3, 2009
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

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