External pressure building circuit for rapid discharge cryogenic liquid cylinder
US6276143A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2000 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Jan 18, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17C2260/011
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An external pressure building circuit for a portable cryogenic liquid cylinder which includes a tubular member disposed outside of the cylinder. The tubular member has an upper portion and a lower portion. The upper portion of the tubular member is in communication with the gas containing portion of the cryogenic liquid cylinder; the lower portion is in communication with the liquid containing portion of the cryogenic liquid cylinder. The tubular member between about 30 and 60 inches long and includes a plurality of fins attached to the tubular member. The fins act as a heat transfer device. In operation a quantity of cryogenic liquid enters the lower portion of the tubular member and is heated. Once the liquid is converted to a gas, it is returned to the gas containing portion of the cylinder. By converting a sufficient quantity of cryogenic liquid to gas, a pressure of greater than 400 p.s.i. can be maintained at a high continuous rate of flow, e.g., greater than 2000 cfh.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.