Method of preventing atmosphere from entering heat-insulating container
US4497178A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 28, 1983 |
| Grant date | Feb 5, 1985 |
| Priority date | — |
| Expiry date | Mar 28, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17C2260/032
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of preventing the atmosphere from entering a heat-insulating container adapted to temporarily reserve a low-temperature liquefied gas, wherein a dry gas is constantly supplied to the inside of the heat-insulating container when it is in an inoperative state, in order to maintain the inside of the heat-insulating container in a dry gas atmosphere having a pressure slightly higher than the atmospheric pressure. The dry gas is a vaporized gas of a low-temperature liquefied gas of the same kind as the low-temperature liquefied gas to be used. The dry gas is led out in the gas phase from a supply container for supplying the low-temperature liquefied gas to be used, or is a gas obtained by vaporizing a part of the low-temperature liquefied gas to be used, outside the supply container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.