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Class Information
Number: 137/283
Name: Fluid handling > Hydrant type > Removable valve and valve seat
Description: Apparatus in which a valve and its valve seat are so arranged as to facilitate removal, usually where the valve opens downwardly.

Sub-classes under this class:

Class Number Class Name Patents
137/284 With extension to facilitate removal 0

Patents under this class:

Patent Number Title Of Patent Date Issued
8683831 Locking cover plate arrangement Apr. 1, 2014
8302623 Anti-backflow insert for a fire hydrant outlet Nov. 6, 2012
7975720 Ball valve cartridge for use with remote handle Jul. 12, 2011
6929022 Fire hydrant valve seat flange Aug. 16, 2005
D504546 Canine relief station having watering outlet with internal water reservoir Apr. 26, 2005
5441074 Unitized hydrant valve assembly Aug. 15, 1995
5368064 Unitized hydrant valve Nov. 29, 1994
4748997 High pressure hydrant repair apparatus and method of repair Jun. 7, 1988
4303223 Valve facing for sliding valve elements or the like Dec. 1, 1981
4073307 Valve for fire hydrants Feb. 14, 1978
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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