Patent Yard Sign in
Expired Canadian patentCanada

Joint secured against sliding

CA 1289988 C · Owner: Vorbeck, Manfred · Inventors: Imhof, Erich; Vorbeck, Manfred

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

A spigot-and-socket joint which is secured against pulling apart, particularly for socket pipes manufactured by centrifugal casting or molding, wherein the spigot end of one pipe is pushed into the socket end of another pipe with, radial play, comprises a sealing ring and a gripping ring in the socket pipe, the gripping ring comprising a plurality of gripping segments mutually spaced circumferentially and each having a spherically convex radially outer surface and being interconnected in the circumferential direction by a vulcanized intermediate piece of rubber or the like and a, toothed configuration on the radially inner surface so that, when axial tensile forces arise at the joint the …

Read the whole patent

Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted October 1, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 5, 1987
GrantedOctober 1, 1991
Term endedOctober 1, 2008
Patent numberCA 1289988 C
Classification (IPC)F16L37/08 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedMarch 5, 1987Patent grantedOct 1, 1991Term endedOct 1, 2008

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.