Patent ID: 9157554
Filing Date: 2015-10-13
Classification: F16L

Abstract:
1. A boltless locking arrangement for secure attachment of a boss to a fixed structural part, said boss having a central axis and is extending substantially perpendicular to the plane of the fixed structural part when the parts are assembled, the boltless locking arrangement comprising: two substantially radially extending, when viewed relative to the central axis, action surfaces provided in an external surface of the boss; at least one annular plate formed body made up by individual segments, said at least one annular plate formed body including a first annular surface immediately facing the fixed structural part when the parts are assembled, and a second annular surface opposite to the first annular surface, wherein the second annular surface includes an engaging surface, at a radially inner portion thereof when viewed relative to the central axis, engaging with a respective one of said two action surfaces, and the first annular surface includes an abutting surface, at a radially outer portion thereof when viewed relative to the central axis, abutting the fixed structural part, wherein each of said two substantially radially extending action surface is formed by a first side wall defining a recess recessed radially inwardly from the external surface of the boss toward the central axis of the boss, said recess is further defined by a second side wall, opposite to the first side wall, and a clearance is present between the first annular surface at a portion that is radially inward of said abutting surface, and the second side wall.