Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1987-09-04
1988-06-07
Chambers, A. Michael
Fluid handling
Processes
Cleaning, repairing, or assembling
137283, 137300, 137316, 2940208, F16L 5518
Patent
active
047489979
ABSTRACT:
An apparatus and method of removing and replacing the main water supply valve of a high pressure hydrant without the necessity of shutting off the supply of water to the hydrant, wherein the apparatus generally comprises a hydrant adapter for interconnection of the apparatus to a variety of hydrant configurations, a slide valve chamber and slide valve assembly, a main body, a valve seat wrench and interconnected elongate wrench shaft moveable through the interior of the apparatus, an upper seal assembly to form a water tight sliding seal around the wrench shaft, a valve lifting tool moveable through the interior of the elongate wrench shaft in water tight relation therewith, a wrench activating assembly, a plurality of bleed valves for removal of water from selected portions of the apparatus, and a bypass valve assembly for equalization of water pressure between selected portions of the apparatus. In use, the upper portion of the hydrant to be repaired is removed and the hydrant adapter is attached to the base of the hydrant and the main portion of the apparatus is attached to the hydrant adapter opposite its attachment to the hydrant base. The valve wrench, wrench shaft and valve lifting tool are inserted into the apparatus, which is then sealed against outflow of water, the hydrant valve and seat are released from the hydrant base and lifted through the interior of the apparatus to a position above the slide valve, which is closed to isolate upper and lower sections of the apparatus. The upper section of the apparatus is then opened, a replacement hydrant valve is installed by generally reversing the steps for removal of the original hydrant valve, the apparatus is removed from the hydrant base, and the hydrant is reassembled.
REFERENCES:
patent: 1349062 (1920-08-01), Goldberg
patent: 3865129 (1975-02-01), Peterson
patent: 4161958 (1979-07-01), Behle
Chambers A. Michael
Sefrna Ronald B.
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