Resources Contact Us Home
Browse by Category: Main > Engineering
Class Information
Number: 137/300
Name: Fluid handling > Hydrant type > With supplemental valve
Description: Apparatus which includes an additional valve independent of the main valve and exposed to fluid upstream of the main valve.

Patents under this class:

Patent Number Title Of Patent Date Issued
8627847 Backflow preventer valve Jan. 14, 2014
7775231 Retrofitting a fire hydrant with a replacement hydrant body containing a secondary valve Aug. 17, 2010
7686031 Hydrant shoe with backflow prevention assembly Mar. 30, 2010
7575017 Wet barrel fire hydrant system with second valve Aug. 18, 2009
7520294 Hydrant shoe with backflow prevention assembly Apr. 21, 2009
7314057 Pedestal hydrant Jan. 1, 2008
7156119 Hydrant knock-off combination flow stop and backflow check valve Jan. 2, 2007
6401745 Fire hydrant automatic shut-off valve Jun. 11, 2002
5218987 Method and apparatus for water surge protection and protection of fire hydrant systems Jun. 15, 1993
4748997 High pressure hydrant repair apparatus and method of repair Jun. 7, 1988
4393891 Device for temporarily rinsing a water cock countersunk in the ground Jul. 19, 1983

  Recently Added Patents
Digital broadcast receiver and method for processing caption thereof
Build process management system
Laboratory spatula
Recording medium, playback device, integrated circuit
Methods and systems for automatically identifying a logical circuit failure in a data network
Telecommunications system and method
Down-drawable, chemically strengthened glass for cover plate
  Randomly Featured Patents
Adjustable bandwidth filter for process variable transmitter
Using a storage controller to determine the cause of degraded I/O performance
Electrolytic gas generator
Container with sealing cap
Phase locked loop circuit and clock reproduction circuit
Deposition of superconducting thick films by spray inductively coupled plasma method
Control apparatus for a vehicular alternator
Process for recovering titanium
Method of forming noble metal contacts
Electromagnetic load controller