Patent ID: 9599144
Date: 2017-03-21
CPC Classifications: A63B,F16B,Y10T

Claim:
1. A link which can be opened and closed, the link comprising a body portion and a first sleeve which is mounted on the body portion, and is movable from a first retracted position in which the link is open and a second position in which the first sleeve is inter-engaged with the body portion to define a closed ring for receiving an object, and further comprising a second sleeve which is internally threaded, and which is mounted on an externally threaded portion of the body portion for movement towards and away from the first sleeve and which may be rotated towards the first sleeve when the first sleeve is in the second position, and to prevent movement of the first sleeve into the first position in which the link is open, wherein the first sleeve is internally threaded and rotatably mounted on a further correspondingly externally threaded portion of the body portion, and wherein the pitch of the threaded portion on which the second sleeve rotates is different to the pitch of the further threaded portion on which the first sleeve rotates.