Locking device for pipes

US10024474B2 · kind B2 · utility

Assignee

• Kongsberg Esco A/S · NO

Inventors

• Anders Nygård · Uppsala, SE
• Ole-Jakob Bjerke · Kongsberg, NO
• Bjørn Bæver · Kongsberg, NO
• Oddvar Danilin · Kongsberg, NO
• Snorre Barlindhaug · Kongsberg, NO

Key dates

• Filing date: Apr 22, 2014
• Grant date: Jul 17, 2018
• Expiry date: Mar 4, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16L37/148
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A locking device for pipes, comprising an inner and an outer pipe provided with adjoining and corresponding circumferential grooves for releasable locking engagement via a locking ring fitted in the grooves and thus releasable locking between the inner and the outer pipe by alteration of the radius of the locking ring, wherein the locking ring has an open section or circle sector along the periphery thereof and is provided, at least at the two radial ends thereof, interrupted by the open section, with two respective guide members comprising respective guide surfaces that are slanted relative to the periphery, and wherein a first one of the guide members is provided with an end stop and a second one of the guide members is provided with a control mechanism protruding through an oblong opening provided through the outer pipe along a portion of its radial groove, wherein the radial displacement of the control mechanism along the oblong opening increases the open section or circle sector of the locking ring while simultaneously forcing the radius of the locking ring to increase for release of the locking engagement owing to the slanted guide surfaces.