Spigot-and-socket joint secured against sliding

US5297824A · kind A · utility

Assignee

• Eisenwerke Fried.Wilh.Duker GmbH & Co. · DE

Inventors

• Erich Imhof · Laufach, DE
• Karl H. Bergmann · Petershohn, DE
• Manfred Vorbeck · Laufach, DE

Key dates

• Filing date: Oct 15, 1992
• Grant date: Mar 29, 1994
• Expiry date: Oct 15, 2012

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16L37/0925
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The spigot-and-socket joint which is secured against sliding is designated for moulded parts and for socket pipes (1) produced by the centrifugal casting technique, with the spigot end (3) of the one pipe adapted to be slid, with radial play, into the socket end (2) of the other pipe. In the socket end there are arranged a sealing ring (8) and a separate clamping ring (14) comprising a plurality of circumferentially extending, spaced clamping segments (15) having a spherically convex outer surface (17) and, on their inner surface (18), a tooth system (19) which, in the presence of axial forces, presses radially onto the spigot end (3) as the spherically convex surface (17) cooperates with a pipe socket's inner surface (18) which tapers conically towards the end. An elastomer support member (20), which can be fixed in its position at the socket face end and supports the same, is provided on the clamping ring (14). A form, which ensures proper retention also in the case of increased rated widths, is obtained when the support member's annular disk-shaped portion (23), which bears on the socket front face (22), comprises a reinforced transition region (26) of increased flexural strengt…