Tank cleaning device
US5482063A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Apr 7, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B15/74
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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 c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.