초록 ▼

A link such as a karabiner has a body portion and a gate portion which is mounted to the body portion about a pivot. The gate defines a free end which is arranged to inter-engage with a nose of the body portion to define a closed ring for receiving a rope passing therethrough and including a first s

A link such as a karabiner has a body portion and a gate portion which is mounted to the body portion about a pivot. The gate defines a free end which is arranged to inter-engage with a nose of the body portion to define a closed ring for receiving a rope passing therethrough and including a first sleeve which, when the ring is closed, is moveable between a first position where the gate is free to rotate about the pivot in at least one direction, and a second position where the sleeve at least partly encloses the free end of the gate and the nose and substantially prevents rotation of the gate about the pivot. The link further includes a second sleeve which is internally threaded and which is mounted on an externally threaded portion of the gate for movement towards and away from the free end of the gate and which may be rotated towards the first sleeve when the first sleeve is in the second position, to prevent movement of the sleeve into first position in which the gate is free to rotate. A dual sleeve maillon, of similar design but omitting the pivoting gate having two sleeves is also described.

대표청구항 ▼

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 def

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. 2. A link as claimed in claim 1 wherein the pitch of the threaded portion on which the second sleeve rotates is less than the pitch of the further threaded portion on which the first sleeve rotates. 3. A link as claimed in claim 1 wherein the link comprises a maillon. 4. A link as claimed in claim 1 wherein the link comprises a karabiner. 5. A karabiner comprising a body portion and a gate portion which is mounted to the body portion about a pivot, the gate portion defining a free end which is capable of inter-engaging with a nose of the body portion to define a closed ring for receiving an object, and comprising a first sleeve which, when the ring is closed, is moveable between a first position where the gate portion is free to rotate about the pivot in at least one direction, and a second position where the first sleeve at least partly encloses the free end of the gate portion and the nose and substantially prevents rotation of the gate portion about the pivot, and further including a second sleeve which is internally threaded, and which is mounted on an externally threaded portion of the gate portion for movement towards and away from the free end of the gate portion and which may be rotated towards the first sleeve when the first sleeve is in the second position, to prevent movement of the first sleeve into the first position in which the gate portion is free to rotate, 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. 6. A karabiner as claimed in claim 5 wherein the pitch of the threaded portion on which the second sleeve rotates is less than the pitch of the further threaded portion on which the first sleeve rotates. 7. A karabiner as claimed in claim 5 wherein the second sleeve is in the form of a nut. 8. A karabiner as claimed in claim 5 wherein the second sleeve has a generally cylindrical exterior which is contoured to provide grip. 9. A link comprising: a body portion comprising a first threaded portion with a first thread pitch and a second threaded portion with a second thread pitch that is different than the first thread pitch;a first sleeve comprising threads that engage the first threaded portion, wherein the first sleeve is movable between a first retracted position and a second position, in which the first sleeve is inter-engaged with the body portion to define a closed ring; anda second sleeve comprising threads that engage the second threaded portion, wherein the second sleeve is operable to abut the first sleeve when the first sleeve is in the second position to prevent movement of the first sleeve to the first retracted position. 10. The link of claim 9, wherein the second thread pitch is less than the first thread pitch. 11. The link of claim 9, wherein the link comprises a karabiner. 12. The link of claim 11, wherein the body portion comprises a frame comprising one side defining a spine and an opposing side defining a gate, wherein the gate comprises the first threaded portion and the second threaded portion. 13. The link of claim 12, wherein the gate is pivoted to a portion of the frame, and the gate comprises a free end that is operable to engage a nose of the frame. 14. The link of claim 13, wherein the gate is biased to a closed position. 15. The link of claim 13, wherein the first threaded portion is positioned between the free end of the gate and the second threaded portion. 16. The link of claim 9, wherein the link comprises a maillon. 17. The link of claim 16, wherein the body portion comprises a frame comprising a side defining a spine and an opposed side defining an opening.