Plastic toothed wheel for a toothed wheel pump

US6264449A · kind A · utility

Inventors

• Alexander Maute · Hechingen, DE
• Willi Schneider · Bodelshausen, DE

Key dates

• Filing date: Feb 16, 2000
• Grant date: Jul 24, 2001
• Expiry date: Feb 16, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2/084
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A plastic toothed wheel for a toothed wheel pump comprises a wheel body (20) having external or internal teeth. To keep the weight of this toothed wheel as low as possible, its teeth (26) have at least one cavity (32) accessible from at least one end face of the tooth. Toothed wheel pumps having such toothed wheels for supplying and pressurizing engine oil in automotive vehicle engines avoid splashing losses caused by the cavities (32) by closing the cavities or filling them up with a temperature and media resistant foam material (66).