Abstract

Embodiments of the present invention provide improved weeping systems adapted for use with fire hydrants having protection systems. The weeping systems provide one or more check valves adapted to assist air to exit through a weeping hole of the hydrant.

IPC Classes  ?

• E03B 9/14 - Draining devices for hydrants
• E03B 9/16 - Devices for retaining foreign matter, e.g. sand

Abstract

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.

IPC Classes  ?

• E03B 9/16 - Devices for retaining foreign matter, e.g. sand
• E03B 9/14 - Draining devices for hydrants
• F16K 27/00 - Construction of housings; Use of materials therefor

Abstract

A nozzle attachment device 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 housing with a channel and connection means for the fire hydrant's nozzle for efficient and cost effective installation, a seat and a valve within the channel which interact 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.

IPC Classes  ?

• A62C 35/20 - Hydrants, e.g. wall-hoses, wall units, plug-in cabinets
• E03B 9/04 - Column hydrants

Abstract

Wet barrel fire hydrants (10) which feature 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 valves which close off portions of the hydrant or water conduit otherwise available for receipt of toxic or other materials when the fire hydrant nozzle cap is unscrewed and open and/or a pump is connected to the nozzle (14). Such valves preferably open automatically when water is flowing from the water supply through the nozzle (14), but close off portions of the barrel when the nozzle (14) is open and water is not flowing through the nozzle (14).

IPC Classes  ?

• E03B 9/16 - Devices for retaining foreign matter, e.g. sand

Abstract

Various embodiments of the present invention relate to trench box safety ladders and methods of constructing trench boxes with safety ladders. In one embodiment, a trench box comprises two side walls with a plurality of supports between the two walls, a built-in ladder within the inner face of a side wall, and an extension ladder positioned on the top face of the side wall.

IPC Classes  ?

• E02D 17/08 - Bordering or stiffening the sides of ditches or narrow shafts for foundations

Abstract

The present invention relates to a fire hydrant having, a primary valve (602) and a secondary valve (604). An actuator rod (608) is provided to open and close the valves whereby the actuator rod has an additional structure for allowing air to reach the area of the fire hydrant below the secondary valve. Various embodiments include an actuator rod with openings (626) and hollow portions (624) and configured to provide air from the area of the hydrant above the secondary valve to the area of the hydrant below the secondary valve. In some embodiments of the present invention, a check valve (700) is provided with the actuator rod that is adapted to prevent the flow of fluid in at least one direction.

IPC Classes  ?

• E03B 9/14 - Draining devices for hydrants

Abstract

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 seat and elongated member for efficient and cost effective installation and cooperation with valves, which 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.

IPC Classes  ?

• E03B 9/04 - Column hydrants