Locking device for a threaded fastener

A method of locking a tube coupling having at least first and second threaded fasteners that secure to respective first and second end sections of an inner coupling body with a locking device comprising:

• securing the first clamping section of the locking device around the first threaded fastener;
• securing the second clamping section spaced from the first clamping section around the second threaded fastener relative to which the first threaded fastener is rotational;
• preventing rotation of the first clamping section relative to the second clamping section with a bridging element that connects the first and second clamping sections to one another
• wherein the first clamping section includes a first substantially annular elongate strap that is substantially orthogonal to a first clamping section axis, and the second clamping section includes a second substantially annular elongate strap that is substantially orthogonal to a second clamping section axis, and wherein the first and second clamping section axes are coaxial or are orthogonal to one another;
• wherein at least one of the straps includes a circumferentially extending channel along at least part of its length.

A tube coupling and locking device assembly comprising:

• a tube coupling including an inner coupling body having a central bore extending threrethrough, and having at least first and second threaded portions that secure to respective first and second end sections of the inner coupling body,
• the first threaded portion having a first rotatable circumferential surface rotatable about a first longitudinal axis of the central bore and the second threaded portion having a second rotatable circumferential surface rotatable about a second longitudinal axis of the central bore;
• a locking device having a first clamping section secured to the first rotatable circumferential surface, a second clamping section secured to the second rotatable circumferential surface, wherein the first clamping section includes a first substantially annular elongate strap that is substantially orthogonal to the first longitudinal axis, and the second clamping section includes a second substantially annular elongate strap that is substantially orthogonal to the second longitudinal axis, and a bridging element rigidly connecting the first and second clamping sections;
• wherein the locking device rigidly couples the first and second circumferential surfaces to one another such that any loosening rotational force provided to the first clamping member generates a force in the tightening direction of the second clamping member, thereby positively opposing loosening of the circumferential surfaces;
• a locking mechanism arranged to hold the clamping sections in the clamped configuration.