Patent · US Expired

Vacuum pump

US5904473A · kind A · utility

11Cited by

8References

9Claims

0Family size

Assignee

SIHI Industry Consult GmbH · DE

Inventors

Christian Dahmlos · Kremperheide, DE
Dietmar Rook · Lägerdorf, DE
Ralf Steffens · Neunburg vorm Wald, DE

Key dates

Filing date	Dec 17, 1997
Grant date	May 18, 1999
Priority date	—
Expiry date	Dec 17, 2017

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C2240/51
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A vacuum pump contains two rotary displacement rotor (8) that engage each other, in particular in a convoluted manner, inside in expansion chamber through which flows a stream in the axial direction. The rotors are mounted in cantilever at the delivery side and are linked each to a driving motor (35, 36). Each rotor (8) forms together with its shaft (20), a stationary bearing body (7) and a bearing (21, 22) delimited by the shaft (20) and the bearing body (7) a module that may be removed as a single unit from the housing (3). The rotor (35) of the driving motor is preferably also part of said module.

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