Patent · US Expired

Method of operating a claw-type vacuum pump and a claw-type vacuum pump suitable for carrying out the method

US5660535A · kind A · utility

2Cited by

5References

14Claims

0Family size

Assignee

Leybold GmBH · DE

Inventors

Andreas Kobus · Schwelm, DE
Uwe Gottschlich · Hohenaspe, DE
Lothar Brenner · Bad Münstereifel, DE
Hartmut Kriehn · Neunburg vorm Wald, DE

Key dates

Filing date	Aug 9, 1996
Grant date	Aug 26, 1997
Priority date	—
Expiry date	Aug 9, 2016

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C29/04
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method of operating a claw-type vacuum pump with two or more stages, each of which has a suction chamber with a pair of claw rotors and end-located suction and discharge ports. To avoid the possibility of liquids affecting operation of the pump, the invention proposes that the pump is operated without internal compression and that the gases emerging from at least one stage are cooled.

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