Rope grab
The present invention relates generally to a rope grab comprising a body, and a cover member pivotally coupled to the body. The rope grab also comprises a cam pivotally coupled to the body for grabbing a rope or other lifeline. The rope is grabbed or engaged within a recess defined by the body. The rope grab is designed to provide fall protection, work positioning, and a moveable and temporary anchor point on the lifeline.
1. A rope grab comprising:
a body including a recess adapted to receive a rope, the recess including a depression;
a cover member coupled to the body for movement between an open position where the recess is exposed for receipt of the rope, and a closed position where the cover member encloses the recess to capture the rope;
a cam pivotally coupled to one of the body and the cover member, said cam configured and arranged to engage the rope within the depression when the rope grab is moved along the rope in one direction whereas movement in an opposite direction along the rope is permitted without the cam engaging the rope;
a spring operatively coupled to the cam to urge it into gripping engagement with the rope in the one direction whilst permitting movement of the rope grab in the opposite direction along the rope, the spring configured and arranged to urge the cover member into the closed position;
a lever connected to the cam and coupled to a coupling for securement to a user, wherein movement of the cover member between the open and closed positions is effected whilst the coupling is connected to the lever.
2. The rope grab of claim 1 , wherein the cover member is pivotally coupled to the body via a pivot axle.
3. The rope grab of claim 2 , wherein the cam is also pivotally coupled to the body via the pivot axle.
4. The rope grab of claim 1 , wherein the spring is a torsion spring mounted to the body via a pivot axle.
5. The rope grab of claim 1 , wherein the cover member includes a cover plate which is generally flat and configured and arranged to pivot in a plane disposed substantially perpendicular to a pivot axle.
6. The rope grab of claim 5 , wherein the cover plate includes a key configured and arranged for pivoting movement toward the closed position to engage with a keyway of the body to prevent lateral separation of the cover plate from the body.
7. The rope grab of claim 1 , wherein the cam is formed integral with the lever.
8. The rope grab of claim 1 , further comprising a depressible catch operatively coupled to the body to retain the cover member in the closed position.
9. The rope grab of claim 8 , wherein the depressible catch is configured and arranged upon depression to release the cover member for movement toward the open position.
10. A rope grab comprising:
a body including a recess adapted to receive a rope;
a cover member coupled to the body for movement between an open position where the recess is exposed for receipt of the rope, and a closed position where the cover member encloses the recess to capture the rope;
a cam pivotally coupled to one of the body and the cover member, said cam configured and arranged to engage the rope within the recess when the rope grab is moved along the rope in one direction whereas movement in an opposite direction along the rope is permitted without the cam engaging the rope;
a lever connected to the cam and coupled to a coupling for securement to a user, wherein movement of the cover member between the open and closed positions is effected whilst the coupling is connected to the lever;
a spring operatively coupled to the cam to urge it into gripping engagement with the rope in the one direction whilst permitting movement of the rope grab in the opposite direction along the rope, the spring urging the cover member into the closed position.
11. The rope grab of claim 10 , wherein the cover member and the cam are pivotally coupled to the body via a pivot axle.
12. The rope grab of claim 10 , wherein the spring is a torsion spring mounted to the body via a pivot axle.
13. The rope grab of claim 10 , wherein the cam is formed integral with the lever.
14. The rope grab of claim 10 , wherein the cover member includes a cover plate which is generally flat and configured and arranged to pivot in a plane disposed substantially perpendicular to a pivot axle.
15. The rope grab of claim 14 , wherein the cover plate includes a key configured and arranged for pivoting movement toward the closed position to engage with a keyway of the body to prevent lateral separation of the cover plate from the body.
16. The rope grab of claim 10 , further comprising a depressible catch operatively coupled to the body to retain the cover member in the closed position, the depressible catch configured and arranged upon depression to release the cover member for movement toward the open position.