Patent · US Expired

Dry-running twin-shaft vacuum pump

US5364245A · kind A · utility

7Cited by

6References

8Claims

0Family size

Assignee

Leybold GmBH · DE

Inventors

Hartmut Kriehn · Neunburg vorm Wald, DE
Lothar Brenner · Bad Münstereifel, DE

Key dates

Filing date	Jun 8, 1993
Grant date	Nov 15, 1994
Priority date	—
Expiry date	Jun 8, 2013

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C27/009
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Dry-running twin-shaft vacuum pump (1) with at least one pumping chamber (11, 12, 13), with a rotor pair (4-5, 6-7, 8-9) situated in the pumping chamber and borne by the shafts, and with a drive housing (21); in the pumping of toxic media, to limit the contaminated areas to components that are easy to assemble it is proposed that between the drive housing (21) and the adjoining pumping chamber (13) an intermediate plate be provided, which is traversed by the shafts (2, 3), contains the laterally exiting exhaust duct (52), and is releasable from the wall (17) of the drive housing (21).

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