Locking device

A locking device for use with a screw-threaded fastener threaded to a work piece, said locking device comprising:

• a first body coaxial with the fastener;
• said first body having a central through-hole therethrough and comprising an outer portion defining at least one pocket within the outer portion;
• and
• at least one further body having a first and second projection retained in a respective one of said pockets, said first and second projection being connected together by a spring member;
• said first projection being formed of two leaves and extending through the respective one of said pockets and having an end portion jutting above an adjacent surface of the first body to engage an adjacent planar surface on the fastener or work piece when compressed on tightening of the fastener so that said first projection deflects within the respective pocket in which it is located under the influence of the tightening of the fastener such that under any tendency to loosen, the first projection jams against the adjacent planar surface of the fastener or work piece and resists loosening of the fastener;
• and
• wherein the first and second projection are aligned with the respective pocket such that the first projection is adjacent a first side wall of the respective pocket and the second projection is adjacent a second side wall of the respective pocket.

A locking device for use with a screw-threaded fastener threaded to a work piece, said locking device comprising:

• a first body coaxial with the fastener;
• said first body having a central through-hole therethrough and comprising an outer portion defining at least one pocket within the outer portion;
• and
• at least one further body having a first and second projection retained in a respective one of said pockets, said first and second projection being connected together by a spring member, wherein said spring member is W-shaped;
• said first projection extending through the respective one of said pockets and having an end portion jutting above an adjacent surface of the first body to engage an adjacent planar surface on the fastener or work piece when compressed on tightening of the fastener so that said first projection deflects within the respective pocket in which it is located under the influence of the tightening of the fastener such that under any tendency to loosen, the first projection jams against the adjacent planar surface of the fastener or work piece and resists loosening of the fastener;
• and
• wherein the first and second projection are aligned with the respective pocket such that the first projection is adjacent a first side wall of the respective pocket and the second projection is adjacent a second side wall of the respective pocket.