Patent · US Expired

Twin-shaft, multiple-stage vacuum pump with the shafts vertically disposed

US4940398A · kind A · utility

13Cited by

15References

19Claims

0Family size

Assignee

Leybold GmBH · DE

Inventors

Hanns-Peter Berges · Neunburg vorm Wald, DE
Hartmut Kriehn · Neunburg vorm Wald, DE
Wolfgang Leier · Bensberg, DE
Ralf Steffens · Neunburg vorm Wald, DE

Key dates

Filing date	May 13, 1988
Grant date	Jul 10, 1990
Priority date	—
Expiry date	May 13, 2008

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C2240/52
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A twin-shaft vacuum pump having a pair of shafts, at least one pump chamber, a pair of rotors disposed in the or in each pump chamber and mounted on the shafts, and housing members defining the pump chamber or chambers, a synchronization mechanism composed of two gears disposed in a side chamber, a drive motor, and a transmission mechanism connecting the drive motor to one of the shafts. In order to simplify installation and servicing of the pump, the shafts are mounted vertically. The side chamber, synchronization mechanism, and transmission mechanism are disposed below the lower rotor pair.

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