Resources Contact Us Home
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
Di and tri- substituted oxathiazine derivatives, method for the production, method for the production thereof, use thereof as medicine and drug containing said derivatives and use thereof
Asynchronous line interface rate adaptation to the physical layer with synchronous lines at the connection layer
System and method for access of user accounts on remote servers
Plants and seeds of corn variety CV294874
Consistent retention and disposition of managed content and associated metadata
Sports helmet
Display unit and display method
  Randomly Featured Patents
Air delivery device
LSI gate array having reduced switching noise
Depolarizing skeletal muscle relaxants
Naphthalene anti-psoriatic agents
Integrated vent and fluid transfer fitment
Apparatus and method for determining the position and orientation of a remote object
Apparatus and method for generating a preamble sequence in an orthogonal frequency division multiplexing communication system
Straw wrapping machine, method and product using a plastic film wrapper
Mass measurement system and method using inertial force and standard mass in gravity-free environment
Hydrothermal processing with phosphate additive