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 for purifying air through germicidal irradiation and method of manufacture
Backside structure and methods for BSI image sensors
Accessory system for vehicle
Image processing apparatus, image processing method, and program to create a composite image from color image data and monochrome image data
Switched capacitor amplifier
Tools and methods for yield-aware semiconductor manufacturing process target generation
Elastic wave device having a capacitive electrode on the piezoelectric substrate
  Randomly Featured Patents
Polychromatic yarn dyeing apparatus
Motorcycle frame
Aminocycloalkanobenzodioxoles as beta-3 selective adrenergic agents
Semiconductor photodetector structure and the fabrication method thereof
Homogeneous potentiometer sensor
2-saccharinylmethyl aryl carboxylates useful as proteolytic enzyme inhibitors and compositions and method of use thereof
Probe intended to be introduced within a living body
Apparatus for transporting signatures
Liquid crystal display device and method of fabricating the same
Process for preparing an A.sub.2A-adenosine receptor agonist and its polymorphs