Emergency operation ring for tubeless tires in motor vehicles

US4592403A · kind A · utility

Assignee

• Vorwerk & Sohn GmbH & Co. KG · DE

Inventors

• Hermann Stein · Taunusstein, DE
• Ulrich Piepenbrink · Schwelm, DE

Key dates

• Filing date: Aug 28, 1984
• Grant date: Jun 3, 1986
• Expiry date: Aug 28, 2004

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60C2017/068
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An emergency operation ring for tubeless pneumatic tires on motor vehicles made of an elastomeric material and mounted on a rim by means of axial clamping pressure. Two support sections extend diagonally upwards and outwards from the base section and define a circumferential channel. The support sections have step shaped outer flanks set back with respect to the base section. At least one circumferential groove is provided contiguous the circumferential channel, and slipping agent is positioned in the groove or grooves. Sealing lips close off the groove and slipping agent when the tire is intact. The wheel load working on the support sections at the beginning of an emergency operation brings the sealing lips into an open position, whereby the slipping agent is released and lubricates the surfaces of the pneumatic tire and the emergency operation ring in contact with each other.