Probe positioning device for a flask freeze drying
US5689895A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Oct 31, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B5/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A device for positioning a probe, such as a temperature sensor, in a flask for freeze drying. The device includes a stopper adapted to be secured to an open end of the flask. The stopper has a center opening and at least one radial opening spaced from the center opening. The radial opening allows for fluid communication between inside and outside of the flask when the stopper is secured to the open end of the flask. The center opening receives a guide tube which extends into the flask and is sized to receive the probe such that substantially no fluid communication between the inside of the flask and the outside of the flask occurs through the guide tube or center opening. A channel formed in an upper surface of the stopper and an O-ring positioned about an outer diameter of a neck of the flask secure the probe in position relative to the guide tube. The multiple radial openings define an annular passageway which mimics fluid communication through a standard slit-type stopper employed in freeze drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.