Integrated oil pump rotor and coupling piece for an oil-sealed vacuum pump

US5749716A · kind A · utility

Assignee

• Leybold GmBH · DE

Inventors

• Thomas Abelen · Cologne, DE
• Lutz Arndt · Troisdorf, DE
• Peter Muller · Adliswil, CH

Key dates

• Filing date: Jan 29, 1996
• Grant date: May 12, 1998
• Expiry date: Jan 29, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T403/7016
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention pertains to an oil-sealed vacuum pump (1) with a pump chamber (8, 9), with a rotor 3 rotatively mounted therein, with a bearing piece (13) delimiting the pump chamber on the drive side and with a passage (35) in the bearing piece (13) which contains a coupling piece (37) used to interlock the rotor (3) with the shaft (36) of the drive motor (4) and a sealing ring (55) to seal off the coupling piece from the passage (35) in the bearing piece (13). To simplify manufacture of the pump, the invention proposes that the interlocking connections between rotor (3) and coupling piece (37) as well as coupling piece (37) and shaft (36) are effected from the faces, and that the coupling piece (37) is a support for a rotor (46) for an oil pump (45, 46), the pump chamber (45) of which is formed in the end plate (13).