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
Rule-based stimulation program search
Dot templates for object detection in images
Method for restricting the use of an application program, system for authenticating the user of a measuring apparatus, authentication server, client apparatus and storage medium
Hedge shear
Tag-based apparatus and methods for neural networks
Multifunction switch for vehicle having lighting module
Method and system for remotely testing a wireless device
  Randomly Featured Patents
Information file processing apparatus and method
Formaldehyde derivatives of mitindomide
Position code bearing notepad employing activation icons
Method of preparing foam using a partially fluorinated alkane having a tertiary structure as a blowing agent
Ferroelectric material, method of producing ferroelectric material, and ferroelectric device
System and method for dynamic impedance tuning to minimize return loss
Exercise device
Product having concealed message
Tricyclic monosaccharide derivatives useful in treating acute ischemia-induced neurodegeneration