Surgical smoke evacuation system
US5226939A · kind A · utility
49Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Oct 22, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2218/008
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A surgical air vacuum apparatus includes an air pump disposed in a primary air channel for moving air between an inlet port and an outlet port of the vacuum. The air pump has properties for generating heat while moving the air, and the moving air has characteristics for cooling the pump. An air filter disposed in the primary channel has a tendency to block the air that would otherwise cool the air pump. Means is provided for combining a secondary air channel and the primary air channel along at least one passage to introduce bleed air to the pump when the filter blocks the primary channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.