Bridge Pulley with Swivel and 46MM ID Ring

monkeylove

monkeylove

Been here much more than a while
Location
Roslyn, Pa.
So after some thought of what is out there and what I would prefer, maybe others also, here is my concept. Basically it is just a Pulley with a single swiveling large ring on top. Maybe about a 46MM ID so you can comfortably fit 3 carabineers. I prefer to ring to the rigging plate since I think it gives more fluidity when moving your tie in points around as you climb. I also like the fact that when I get back to only have 1 tie in point the alignment is back to being over the swivel axis. Am I completely off target here or does someone make one and I just can't find it. Those of you with influence feel free to run with it, I claim no rights, I just think it would work better for many of us.

Frank

Bridge Pulley with Swivel and 46MM ID Ring.webp
 
SherrillTree designed the Rook/Hydra last year and it is being made by Rock Exotica. The idea of a ring is not a bad concept but you limit yourself to 2 or less attachment points no matter how large it is because everything wants to float to the top when it is loaded. When we designed the Rook we wanted to have the functionality of 3 rated attachment points that would not get bogged down. Check it out. I know you wanted the ring but it is the closest thing to it on the market.

http://www.sherrilltree.com/The-Rook-By-SherrillTree-and-Rock-Exotica#.U6CMJvldU1I

 
I agree 3 biners in a ring can sometimes be troublesome, however vary rarely am I removing the center biner. Usally it is taking the an outside one and repositioning it to the other side. This makes the right one the left one, the center one the right one and the left one the center one. You can keepnthis going pretty easily with minimal problems other than the rope bridge alignment trying to twist all up, hence the swivel. The pulley for me is just to make the rope bend radius larger. My problem with the rigging plate concept is....try my switch from above. Where am I moving the outer biner? There is no hole for it and I can't twist the plate 180 degrees to use the same hole over again because there are lines still attached that would now be crossed. Am I missing a technique I need to learn or does thismmake sense to others?
 
I have considered that combo but was unsure if the Omni block was considered "Life Support". I really couldn't find anything that said it was or not, do you use on your bridge or was that setup just to show a possible option? Thank Will.

Frank
 
The block is rated at 23Kn or 5170 Lbs, the face plate is lockable with a set screw.
The SS shackle is 1/2 " screw pin and 3/8 diameter on the ring section.
Strength is not a problem for life support.

I have used the omni on the bridge. I just added the Shackle for your consideration.
 
I agree with trying out the OMNI 1.1. I used it for quite some time on my rope bridge and it worked well (The shackle is a great idea to allow the use of multiple carabiners at once). The 1.1 does come with a screw to "secure" the sideplate, but not everyone is going to utilize this option. After some discussion with the manufacturer, climbers, etc., we felt fixed plates were the way to go on the Rook.

The rigging plate on the Rook was incorporated to allow multiple attachment points but in a way that would significantly decrease the chances of improperly loading the carabiner(s). The 3 holes fit Rock O's perfectly and will accept many other manufacturer's carabiners (not quite as smooth as Rock biners though). I run a Rook on my rope bridge and in my lanyard set up and really like it. But i understand your concerns with your application. If you are wanting a ring on the top, give the OMNI 1.1 a try. It is a great piece of gear and works well on a rope bridge.
 
ReLeaf said:
SherrillTree designed the Rook/Hydra last year and it is being made by Rock Exotica. The idea of a ring is not a bad concept but you limit yourself to 2 or less attachment points no matter how large it is because everything wants to float to the top when it is loaded. When we designed the Rook we wanted to have the functionality of 3 rated attachment points that would not get bogged down. Check it out. I know you wanted the ring but it is the closest thing to it on the market.

http://www.sherrilltree.com/The-Rook-By-SherrillTree-and-Rock-Exotica#.U6CMJvldU1I

Click to expand...

Interesting that you guys are designing hardware now. What kind of 3D drafting software are you using in house?
 
bonner1040 said:
...What kind of 3D drafting software are you using in house?
Click to expand...

The software is called SolidWorks. For the Rook, we supplied Rock with sketches, a rough CAD drawing, and the dimensions. They did the final CAD work, as needed for their CNC machines. Overall it was a pretty cool process. As I'm sure you've experienced, it's a great feeling seeing something go from concept sketch, all the way to a tangible product sold in stores.

-Sean
 
That SolidWorks software looks like the bomb! Probably not cheap and looks like it could be a resource hog on a computer.

Here's a video -

 
Solidworks is wonderful but not cheap (@$5,000) Make it a premium license and your up to @$10,000. Buy a killer computer to run the software, mine was almost $14,000. Total outlay @$25,000 and your ready to go big. Ah the cost of doing business, lol.
 
Yep, tried them all and Solidworks is my favorite. Now I have not tried Google Sketch-up but keep in mind CAD is my living not Treework so.....There are less expensive software's out there that would probably work fine for most home inventors but in my case why would I test drive a Yugo if I already own a Ferrauri (No I don't really, in fact I think I may have even spelled it wrong, lol)
 
Solidworks is by all reports awesome. Its not something I am experienced with! It does sound like a cool process Sean. I was actually talking about it with the Rock guys last week and they had nothing but positive vibes!
 
Pulleys on a bridge seem so unnecessary, the swivel alone is the perfect setup for me. What are the advantages of having a pulley on the bridge? How much Does it facilitate ease of movement, or extend the life of your bridge? What are the other advantages?
 
TimberJack said:
Pulleys on a bridge seem so unnecessary, the swivel alone is the perfect setup for me. What are the advantages of having a pulley on the bridge? How much Does it facilitate ease of movement, or extend the life of your bridge? What are the other advantages?
Click to expand...

Both, no friction when shifting side to side, and bridges last forever, to the point where I replace them just for ease of mind even though they pass visual inspection
 
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