Vacuum producing rotary vane pump with shaft lubrication

US4231727A · kind A · utility

Assignee

• Volkswagenwerk AG · DE

Inventors

• Peter Buchholz · Gifhorn, DE
• Rolf Warnecke · Ulmen, DE
• Alfred Beier · Braunschweig, DE

Key dates

• Filing date: Jun 29, 1977
• Grant date: Nov 4, 1980
• Expiry date: Jun 29, 1997

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2230/22
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A rotary vacuum pump is provided with a housing having a cylindrical chamber. A rotor having a plurality of slideably mounted vanes is mounted within the chamber by a shaft extending through an eccentric bore. Hydraulic oil delivered to the rotor under pressure urges the vanes against the chamber walls. Escaping oil lubricates and seals the vanes and also lubricate the rotor shaft.