Piston vacuum pump
US4679994A · kind A · utility
14Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1983 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Jun 27, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S417/01
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piston vacuum pump includes a housing (40) which is extruded from aluminum to form a bore (42) for movably receiving a piston (44). The piston is made from a plastic material to define a sealing interface with the aluminum housing in the absence of additional sealing rings and lubricants. The extruded housing is also provided with an opening (64) to receive an input member (90) and to provide for fluid communication through the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.