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
System and method for determining payroll related insurance premiums
Load balancing in shortest-path-bridging networks
Flow cytometer method and apparatus
Systems and methods for adaptive blind mode equalization
Light barrier and method for detecting objects
Integrated multi-sat LNB and frequency translation module
Image scanner and image forming apparatus
  Randomly Featured Patents
Enhancing the characteristics of magnetically stabilized fluidized beds
Method and system for recording a viewing point
Syndiotactic polystyrene nanocomposite and manufacturing method thereof
Birefringement film containing liquid crystal material having multi domains with splayed structure
Housing-less plate heat exchanger
Flame retardant polycarboxy alkyl and aryl phosphonates
Capacitively coupled ring detector with power provided across isolation barrier
Method and apparatus for multipath demodulation in a code division multiple access communication system
Apparatus and method for monitoring and recording the audible environment of a child, patient, older person or pet left in the care of a third person or persons
Drying of solvent-treated objects