Convoluted boot and constant velocity joint lubricant

US7384673B2 · kind B2 · utility

Assignee

• GKN Automotive Limited · DE

Inventors

• Herbert Konegen · Rösrath, DE
• Hans Schreiber · Aichach, DE
• Lothar Gasper · Lohmar, DE

Key dates

• Filing date: Dec 23, 2002
• Grant date: Jun 10, 2008
• Expiry date: Mar 5, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/139
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A convoluted boot for constant velocity joints and a constant velocity joint lubricant for use in such a convoluted boot. An additive which is added to the constant velocity joint lubricant and/or to the convoluted boot material is provided. The additive comprises amide waxes and also may include hydrocarbon oils. Use is made, in particular, of monoamides and/or diamides of carboxylic acids with 8 to 50 carbon atoms to form, by diffusion, a lubricating film on the surface of a convoluted boot. Furthermore, oleic acid amide and/or ethylenediamine distearate result in a particularly early formation of a lubricating film on the outer boot surface and thus to a long-term prevention of noise.