Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Retrofitting a fire hydrant with a replacement hydrant body containing a secondary valve










Image Number 12 for United States Patent #7775231.

The present invention relates to methods and devices for retrofitting fire hydrants with additional structure for reducing the potential that those with ill intent can foul municipal water supplies by introducing toxins or other materials into fire hydrants. Various embodiments include a replacement hydrant body having an enlarged diameter portion that can be installed to replace an existing hydrant body. The replacement hydrant body can include a secondary valve comprising a seat, biasing structure, and a restriction member to close off portions of the hydrant otherwise available for receipt of toxic or other materials when the fire hydrant nozzle cap is unscrewed and open.








 
 
  Recently Added Patents
Efficient paging in a wireless communication system
Sliding-type portable communication device
Resistor and manufacturing method thereof
Magnetic memory and method of manufacturing the same
Preparation and use of meristematic cells belonging to the Dendrobium phalaenopsis, Ansellia, Polyrrhiza, Vanilla, Cattleya and Vanda genera with high content of phenylpropanoids, hydrosoluble
System and method for browsing tabbed-heterogeneous windows
Automatic actuator for breakers or switches
  Randomly Featured Patents
Display apparatus
Air-bag and a method of deploying an air-bag
Insect robot
Goalpost upright verticality adjustment system and method
Device for protecting a battery from electrostatic charging
Portable bathing tub accessory for shower stall
Apparatus for handling rod-like articles
Use of HIV-1 gp120 and gp160 proteins modified in the v3 loop for the preparation of vaccine compositions and formulations containing the same
Method for determining a presence or absence of a nonparaffinophilic hydrophobic microorganism in a body specimen and an associated kit
Device for adjusting the alignment of a back cover screwed onto the middle part of a watchcase with respect to a 12 o'clock--6 o'clock axis