Evaporator
US6264895A · kind A · utility
Inventor
Key dates
| Filing date | Feb 26, 1999 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Feb 26, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L7/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An evaporator comprises a base with a vacuum connection. A tray is fixed to the base, and has seating positions in which to seat pans which hold sample liquid. A transparent cover is attached to the base with a hinge. The cover fits over the tray and when closed forms a tight fit with the base and is in close proximity to the pans. The cover has inlets angled down at about 37.degree. to 42.degree. over each pan seating position such that when a vacuum source is connected to the vacuum connection, air from outside the evaporator is drawn in through the inlets and aimed toward the sample liquid in each pan such that the solvent evaporates. Pans are preferably commercially available pans which are about 70 mm in diameter and about 16 mm in height, and tapered outwardly towards the top. Preferably, the cover has two inlets for each pan, aimed in opposite directions, and on opposite sides of each pan, such that when air strikes the sample liquid it induces a swirling motion. The vacuum pulls the moisture-carrying air across the tops of the pans and out of the evaporator. Preferably, a heating unit is connected to the base below the tray and heats the sample liquid to a temperature withi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.