Patent · US Expired

Vacuum pump having emergency bearings

US5059092A · kind A · utility

26Cited by

2References

8Claims

0Family size

Assignee

Leybold GmBH · DE

Inventors

Hans-Peter Kabelitz · Cologne, DE
Harald Lassig · Rösrath, DE
Helmut Schneider · Hersbruck, DE

Key dates

Filing date	Aug 16, 1990
Grant date	Oct 22, 1991
Priority date	—
Expiry date	Aug 16, 2010

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16C2360/45
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A vacuum pump has a pump housing, magnetic bearings mounted in the housing, a rotary assembly including a pump rotor disposed in the housing and supported for rotation by the magnetic bearings and two spaced emergency bearings supporting the pump rotor when it deviates by a predetermined extent from a desired position. The rotary assembly has a center of gravity which is situated between the emergency bearings and which is spaced approximately equally therefrom.

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