Engine driven vacuum pump
US4156416A · kind A · utility
12Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1977 |
| Grant date | May 29, 1979 |
| Priority date | — |
| Expiry date | Sep 9, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine driven vacuum pump combining a two-stage, low noise demountable pump assembly with a camshaft driven eccentric drive arrangement having internal oil distribution and pumping means for lubricating the drive and pump pushrod elements. A check valve in the cover of the pump assembly defines a second stage pumping chamber which increases pump efficiency while at the same time cyclically closing the pump outlet to reduce external noise attributable to gas discharge from the primary pumping chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.