Safety flask for freeze drying
US4024648A · kind A · utility
Inventor
Key dates
| Filing date | Oct 22, 1975 |
| Grant date | May 24, 1977 |
| Priority date | — |
| Expiry date | Oct 22, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B5/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A safety flask for freeze drying being formed of chemically-resistant and shock-resistant materials, including a container flask, a cover assembly and a tube removably inserted through the cover assembly so as to be in communication with the interior of the container flask for connection to a vacuum source. Sealing means is mounted in the cover assembly to provide a fluid-tight seal between the tube and the cover assembly. A filter is removably mounted on the cover assembly over the point of communication of the tube with the container flask to prevent cross-contamination between samples and to prevent the sample from being withdrawn by the vacuum. A vacuum release device is mounted on the tube to permit easy removal of the flask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.