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Class Information
Number: 137/307
Name: Fluid handling > Hydrant type > Protection against freezing > Stop and waste > Reciprocating relatively fixed valves
Description: Apparatus in which the control valve and drain valve are relatively fixed and comprise a reciprocating body. A unitary body, usually cylindrical, and cooperating with plural ports to accomplish the stop and waste function is included in this subclass.










Sub-classes under this class:

Class Number Class Name Patents
137/308 Waste through lower valve guide 0


Patents under this class:

Patent Number Title Of Patent Date Issued
8640728 Fire hydrant control valve Feb. 4, 2014
8408238 Yard hydrant with improved valve Apr. 2, 2013
8316876 Flushing device with removable drain ring for potable water systems Nov. 27, 2012
RE42632 Recessed water faucet Aug. 23, 2011
6966332 Air valve assembly for a fire hydrant Nov. 22, 2005
6712089 Recessed water faucet Mar. 30, 2004
6561214 Hydrant with improved drain mechanism May. 13, 2003
6178988 Hydrant design Jan. 30, 2001
5355907 Automatic draining back flow preventer for use with hydrant Oct. 18, 1994
5289840 Yard hydrant Mar. 1, 1994
5217039 Automatic draining back flow preventer for use with ground hydrant Jun. 8, 1993
5012833 Freeze-proof hydrant May. 7, 1991
4971097 Freeze-proof hydrant Nov. 20, 1990
4842008 Fire hydrant Jun. 27, 1989
4372339 Yard hydrant Feb. 8, 1983
4227544 Fire hydrant with improved shoe and valve Oct. 14, 1980
4177826 Fire hydrant with improved shoe and valve Dec. 11, 1979
3980097 Fire hydrant with drain valve and backflow preventer mechanism Sep. 14, 1976
3980096 Fire hydrant Sep. 14, 1976
3943963 Frostproof hydrants for use in fluid handling Mar. 16, 1976











 
 
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