Scroll vacuum pump
US6953330B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 2004 |
| Grant date | Oct 11, 2005 |
| Priority date | — |
| Expiry date | Aug 2, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2240/603
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A scroll vacuum pump has an orbiting scroll and fixed scrolls. The orbiting scroll is rotatably mounted to an eccentric portion of a driving shaft and revolved by the driving shaft, so that a gas is sucked into a compression chamber between the orbiting scroll and fixed scrolls through a sucking bore. External air is introduced through a ventilating hole axially formed in the driving shaft and into the compression chamber via a check valve that opens by centrifugal force when the driving shaft rotates, thereby cooling the eccentric portion and bearings to increase durability thereof. When the driving shaft stops, the check valve closes, so that a toxic gas in the compression chamber is not leaked to the outside to prevent environment pollution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.