Method and apparatus for producing high density dry ice
US5735140A · kind A · utility
5Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1996 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Sep 13, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B32/55
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pneumatic apparatus produces high density dry ice pellets without external electric or hydraulic energy. The apparatus operates solely on compressed air for reduced capital and maintenance costs and for portability to harsh or remote locations. An air-over-oil booster is connected to a pelletizing cylinder which is in turn connected to a source of liquid CO.sub.2 through an electronic controller. The controller sequences a set of fluid valves for operation of both the booster and pelletizing cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.