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
Case for a tablet computer
Image reading apparatus, image reading method and program
Machine shop including computer system that interfaces with different legacy servers
Image forming unit having agitating portion and image forming apparatus
Vacuum cleaner filter adapter ring
Multi-layer, microporous polyolefin membrane, its production method, battery separator and battery
Multi-channel memory system including error correction decoder architecture with efficient area utilization
  Randomly Featured Patents
Biopsy apparatus
Shared weighted fair queuing (WFQ) shaper
Method for controlling reactions
Dual hydraulic safety valve
Surgical instrument with trigger control
Window blind cleaning apparatus
Systems and methods for determining drop distance and speed of moving sportsmen involved in board sports
Pocket door for a boat
Martensitic stainless steel and antifriction bearing using the same
Methods and apparatus for generating secure endorsed transactions