Oil pump for hermetic compressor
US4325679A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 22, 1980 |
| Grant date | Apr 20, 1982 |
| Priority date | — |
| Expiry date | Jul 22, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S417/902
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hermetic refrigeration compressor has a two-stage oil pump in the vertically aligned crankshaft that is journaled in a combination thrust and radial bearing at the bottom of the crankshaft. The oil passes upward through an axial passage in the crankshaft and then outward through a radial passage which comprises the first stage of the pump. The oil then passes through a wide and shallow groove around most of the periphery of the crankshaft and is then returned through a second radial passage to another vertical passage offset from the axis of the crankshaft to move the oil upward to lubricate the various moving parts of the compressor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.