Gravity-fed low pressure cryogenic liquid delivery system
US4561258A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1985 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | Jan 24, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86372
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system for delivering cryogenic liquids at controlled low pressures is disclosed, wherein the liquid is withdrawn from the bottom of a container, and allowed to flow by gravity to the point of use. The system comprises an inlet conduit which directs a liquid cryogen into the container. The inlet conduit is connected to a float valve assembly which regulates the height of the liquid in the container. The vertical position of the float valve assembly is adjustable. The liquid cryogen is withdrawn from the bottom of the container, through an insulated outlet conduit. The pressure of the output liquid is determined by the vertical distance between the lower end of the outlet conduit and the liquid level in the container. Adjustment of the position of the float valve assembly therefore controls the output pressure. Gas bubbles that may form in the liquid tend to rise to the top of the container, so that the output is of a single phase, that is, an essentially pure liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.