Lubricating oil pumping system
US6422346B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1999 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Dec 3, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16N13/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a gas compressor having a crankcase rotatably supporting a drive shaft connected to and adapted for operating compression generating structure of the compressor, the shaft being connected to an electrical motor for being driven thereby in either rotational direction, and the shaft having an oil passage formed generally longitudinally therein for conveying lubricating oil to various portions of the compressor, unique oil pump structure having from one to about six slots formed generally radially thru a portion of the shaft and communicating with the oil passage, an elongated vane slidably mounted in each slot for movement both longitudinally and laterally thereof to provide an oil conduit alongside each of the vanes regardless of the direction of rotation of the shaft, a wall slidably enclosing the shaft portion and having a circular inner surface eccentrically positioned with respect to the shaft portion such that a small vertical segment of the inner surface lies adjacent the shaft portion to thereby provide a generally crescent shaped pumping chamber between the shaft and the inner surface, and an oil inlet provided thru the wall and communicating with the pumping chamber and …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.