Dear all,
I'm looking for a knot but I'm not sure that kind even exists.
First of all I'm working with suture that is relatively small (braided type, between USP 2/0 and 3/0, i.e. between 8 and 12 milliinch in diameter). I have a kind of ring with an inner hole that is 1.5 - 2.5x the diameter the suture, sliding on the suture.
What I need is to stop that ring in one direction. I'm trying to do that with knot made with a second, independent piece of suture, a little bit like a bobber stopper knot would do (
http://www.netknots.com/fishing_knots/bobber-stopper-knot/). The problem is that I need to be able to slide that stopper knot in one direction (relatively easily, i.e. with less than 1lbs force) and it must hold compression of the ring in the other direction (approx 2lbs force).
Unfortunately all the ones I've encountered, like the rolling hitch or the prusik, work in tension and not in compression. I currently have a workaround by using a common surgery knot, the roeder knot, but that requires a loop. Therefore I have suture running in the ring and out of the ring, which is not ideal.
I'm not sure where to start and doesn't even know if that's possible.
Any ideas ?
Thanks a lot !
Martin