Cleaning and liquid contact with solids – Apparatus – Automatic controls
Patent
1994-04-07
1996-01-09
Stinson, Frankie L.
Cleaning and liquid contact with solids
Apparatus
Automatic controls
134167R, 134181, 91 2, B08B 906
Patent
active
054820634
ABSTRACT:
A cylinder containing a piston rod to which a nozzle is attached, is fixed to the outside of a tank. A pressurized fluid is sprayed into the tank from the nozzle, and the piston rod elongates and contracts with the pressure of this fluid. Further provided are a first supply passage connecting a first pressure chamber formed around the piston rod in the cylinder to a pump, a return passage connecting a second pressure chamber on the opposite side of the piston rod to the tank, and a second supply passage connecting the second pressure chamber to the pump. A first valve is provided in the return passage, and a second valve is provided in the second supply passage. In addition, there are provided a mechanism for detecting the contracted and an elongated position of the piston rod, a mechanism for closing the first valve and opening the second valve when the contracted position is detected, and a mechanism for opening the first valve and closing the second valve when the elongated position is detected, and the piston rod is made to automatically execute contraction/elongation cycles. Still further provided is a mechanism for stopping the operation of the pump when the number of these cycles has reached a predetermined value. In this manner, fluid is sprayed in the tank to clean its interior while the nozzle automatically moves back and forth in the tank, and the spray automatically stops when a preset number of back and forth movements have been executed.
REFERENCES:
patent: 1392115 (1921-09-01), Cheney
patent: 1605840 (1926-11-01), Hubers et al.
patent: 2200663 (1940-05-01), Wilson
patent: 4798334 (1989-01-01), Harrington
patent: 5172710 (1992-12-01), Harrington
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Stinson Frankie L.
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