Bellows with impregnation

US6569021B1 · kind B1 · utility

Assignee

• GKN Automotive Limited · DE

Inventors

• Thomas Schmidt · Timmendorfer Strand, DE
• Joachim Wette · Hennef (Sieg), DE
• Thomas Schafferus · Rheinberg, DE
• Herbert Konegen · Rösrath, DE
• Hans Schreiber · Aichach, DE

Key dates

• Filing date: Jul 17, 2000
• Grant date: May 27, 2003
• Expiry date: Jul 17, 2020

Classification

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

Abstract

The invention relates to an impregnating agent for a convoluted boot consisting of a thermplastic or elastomer material and used for covering the chamber of a joint, especially a rotating joint subjected to large articulation angles, which joint chamber is filled with a lubricant, said convoluted boot comprising a plurality of folds and two end collars, with the surfaces of the convoluted boot wall contacting one another when the joint is subjected to large articulation angles. It is the object of the invention to reduce the wear and eliminate squeaking symptoms of convoluted boots treated with the inventive impregnating agent. In accordance with the invention, the objective is achieved in that the impregnating agent contains a carrier fluid, an oil dissolved in the carrier fluid and having a molecular weight of >200, and a wetting agent which is soluble in oil and which reduces the surface tension of the oil.