Patent · US Expired

Vacuum pump and trap combination

US4612957A · kind A · utility

2Cited by

7References

3Claims

0Family size

Assignee

Leybold-Heraeus GmbH · DE

Inventors

Lutz Arndt · Troisdorf, DE
Paul Bachmann · Cologne, DE
Hanns-Peter Berges · Neunburg vorm Wald, DE
Wolfgang Leier · Bensberg, DE
Dieter Vorberg · Lechenich, DE

Key dates

Filing date	Jan 29, 1985
Grant date	Sep 23, 1986
Priority date	—
Expiry date	Jan 29, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86083
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A vacuum pump and trap combination in which the trap is configured in the manner of a siphon and comprises a tube immersed in trap liquid but having an opening lying above the trap liquid level. The tube has a wall section lying below the trap liquid level and having perforations therein to admit different amounts of trap liquid in relation to the rate of discharge gas flow, thereby preventing frothing of the trap liquid.

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