Device for changing the rotational position of a shaft relative to a drive wheel and method of making same

US6129063A · kind A · utility

Assignee

• Dr. Ing. h.c. F. Porsche AG · DE

Inventors

• Bernd Niethammer · Jeffery Road, DE
• Andreas Knecht · Herrenberg, DE

Key dates

• Filing date: Jul 22, 1999
• Grant date: Oct 10, 2000
• Expiry date: Jul 22, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/2102
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device for changing the rotational position of a shaft relative to a drive wheel has an adjusting device with two pressure chambers that act against one another. The chambers are pressurized by a pressure medium pump. The adjusting device includes an inner part with ribs that divides the chambers formed by the ribs of a compartmented wheel into corresponding pressure chambers. A plurality of depressions extending axially are machined into the circumferential surfaces of the compartmented wheel that faces the ribs of the inner part, which depressions serve to collect dirt particles carried by the pressure medium into the pressure chambers.