Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1987-10-16
1988-10-25
Walton, George L.
Fluid handling
Processes
Cleaning, repairing, or assembling
134 21, 134 221, 134166C, 134169C, 137238, 137318, 137319, B08B 902, B08B 504, F16K 4300
Patent
active
047796367
ABSTRACT:
This process permits an inlet/outlet to be established in a liquid filled tank using an underwater diver without the necessity of draining or otherwise putting the tank out of service. The diver enters the tank at the top and places a dry pot against about the center of the back of the manhole cover. A hole is drilled in the manhole cover and a pipe nipple inserted through the hole. A flange is provided on the pipe nipple and if a gasket is not used, it is welded completely around to prevent leakage. A cap or valve is screwed onto the pipe nipple on the outside and the dry pot is removed. Various other ways of placing the pipe nipple through the wall are described. The installed nipple can be used by attaching a suction hose thereto for the purpose of removing sediments from the floor of the tank. If desired a smaller inlet/outlet installed in this manner is used to supply air for a diver working on the inside of the tank.
REFERENCES:
patent: Re27895 (1974-01-01), Ray
patent: 174542 (1876-03-01), Letzkus
patent: 314085 (1885-03-01), Van Norman
patent: 334520 (1886-01-01), Dodge, Jr.
patent: 2353530 (1944-07-01), Walker
patent: 4214603 (1980-07-01), Hall et al.
patent: 4345613 (1982-08-01), Mills et al.
patent: 4430788 (1984-02-01), Haynes
patent: 4571271 (1986-02-01), Dildine
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