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Class Information
Number: 137/301
Name: Fluid handling > Hydrant type > Protection against freezing
Description: Apparatus which makes some provision for preventing freezing of water in the riser or around the valve, by providing for its removal from the hydrant, by arrangement of the connection to the water main or by means provided inside the flow path.










Sub-classes under this class:

Class Number Class Name Patents
137/302 Stop and waste 18


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8511335 Heat transfer reduction apparatus Aug. 20, 2013
8490638 Retrofit valve assembly kit for frost-resistant hydrant Jul. 23, 2013
8474476 Sanitary hydrant Jul. 2, 2013
8413675 Yard hydrant made easy Apr. 9, 2013
8402991 Outlet valve for a frost-preventing faucet Mar. 26, 2013
7992585 Retrofit valve assembly kit for frost-resistant hydrant Aug. 9, 2011
7975720 Ball valve cartridge for use with remote handle Jul. 12, 2011
7828005 Freezeless hydrant Nov. 9, 2010
7753065 Hydrant backflow restriction system Jul. 13, 2010
7686028 Structure of straight-out controllable ceramic valve of anti-freezing faucet Mar. 30, 2010
7654280 Anti-freezing hydrant Feb. 2, 2010
7617835 Hydrant assist kit Nov. 17, 2009
7497228 Freeze and backflow protection for a subterranean water flushing system Mar. 3, 2009
7438082 Frost-resistant stand valve Oct. 21, 2008
7401620 Yard hydrant with drain port check valve Jul. 22, 2008
7249609 Yard hydrant with closure valve check valve Jul. 31, 2007
7234479 Sanitary yard hydrant Jun. 26, 2007
7228868 Fire hydrant system Jun. 12, 2007
7093610 Outdoor hydrant-type water faucet Aug. 22, 2006
7089955 Recreational vehicle low temperature water supply warming system Aug. 15, 2006
7059337 Fluid hydrant Jun. 13, 2006
6948509 Fluid hydrant Sep. 27, 2005
6899120 Yard hydrant May. 31, 2005
6883534 Freeze protection device for wall hydrants/faucets Apr. 26, 2005
6857442 Freeze protection device for wall hydrants/faucets Feb. 22, 2005
6830063 Freezeless protection device for wall hydrants/faucets Dec. 14, 2004
6769446 Freeze protection device for wall hydrants/faucets Aug. 3, 2004
6684900 Installation device for yard hydrant Feb. 3, 2004
6668852 Frost proof sillcock service sleeve Dec. 30, 2003
6659123 Maintaining readiness in fire hydrants Dec. 9, 2003
6427716 Positive displacement hydrant with water discharge path from reservoir Aug. 6, 2002
6394125 Leak-containing sheath for frost-resistant hydrant May. 28, 2002
6321773 Water valve assembly and water draining method Nov. 27, 2001
6279594 Flow actuated valve Aug. 28, 2001
6216722 Freeze-resistant hydrant Apr. 17, 2001
6158455 Antifreeze cap for faucet Dec. 12, 2000
6116265 Removable frost proof hydrant Sep. 12, 2000
6085776 Water supply system Jul. 11, 2000
6047723 Positive displacement yard hydrant Apr. 11, 2000
6003780 Freezeproof valve assembly for a drinking fountain Dec. 21, 1999
5979490 Adjustable anti-freeze water delivery assembly Nov. 9, 1999
5830380 Methyl salicylate antifreeze solution method Nov. 3, 1998
5797416 Faucet and water pipe freeze-protection device Aug. 25, 1998
5553637 Frost-free water supply Sep. 10, 1996
5261441 Yard hydrant Nov. 16, 1993
5246028 Sanitary yard hydrant Sep. 21, 1993
5176166 Insulating and stabilizing structure for a faucet Jan. 5, 1993
5115833 Ground hydrant with ninety-degree water flow turn-off ball valve below frost line May. 26, 1992
5033500 Freeze valve apparatus Jul. 23, 1991
4928731 Aircraft toilet tank filling valve assembly May. 29, 1990

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