Patent · US Expired

Vacuum pump with oil separator

US5697771A · kind A · utility

6Cited by

2References

3Claims

0Family size

Assignee

Leybold GmBH · DE

Inventors

Lutz Arndt · Troisdorf, DE
Winfried Kaiser · Cologne, DE
Peter Muller · Adliswil, CH

Key dates

Filing date	Feb 15, 1996
Grant date	Dec 16, 1997
Priority date	—
Expiry date	Feb 15, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S418/01
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to a vacuum pump (1) with an oil separator (42) connected downstream of its outlet (33) and with a duct (45, 46) through which the oil separated in the oil separator (42) is returned to the vacuum pump (1); to feed back the oil in a simple manner, the oil feed duct (45, 46) opens into a duct (47) that supplies gas ballast to the pump (1).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.