Sealing device for pipes

US6089618A · kind A · utility

Assignee

• Forsheda AB · SE

Inventors

• Wieland Neumann · Mönchengladbach, DE
• Lennart Jornhagen · Värnamo, SE

Key dates

• Filing date: Mar 23, 1998
• Grant date: Jul 18, 2000
• Expiry date: Mar 23, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16L21/03
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A sealing device for sealing an annular space between a socket and a spigot end introduced therein comprises a sealing ring (10) and an annular element (12) connected therewith and consisting of a non-elastic cellular plastic, for example styrene cellular plastic. The sealing device is intended to be moulded into the socket at the cylindrical inner surface thereof with the sealing ring (10) positioned adjacent the free end of the socket and the annular cellular plastic element (12) positioned axially inside the sealing ring. The annular element (12) consisting of non-elastic cellular plastic is formed with recesses (22) which are positioned at or in connection with the inner surface of the annular element for allowing a radial expansion of the inner surface of the annular element under the influence of the spigot end introduced into the socket.