prusik minder for the non-prusik minding pulley

Fairfield · 19th December 2009, 09:08 AM

My rescue team has been testing this little plastic piece out for a little bit. I myself have not had it grow on me much. It is good for when you have min man power, but have been having a problem with it poping off. I think I just have to smooth out the hole a little. What are some thoughts on this.

Eric Frei · 19th December 2009, 11:01 AM

Interesting, I have been thinking of something similar. The split on one side to get it on and off will be where it opens up and pops off, need to think up a way of preventing that.

I have been thinking of a metal model with a hinge and quick clamp. You close it and use one of these type of gizzmos to clamp it closed.

FlashD · 19th December 2009, 12:39 PM

Both, very interesting idea.

Fairfield · 19th December 2009, 01:01 PM

Ekka, what do you think about velcrow? light cheap and you can get alot from one roll.

Fairfield · 19th December 2009, 01:02 PM

HOLY CRAP 100 posts!!

Eric Frei · 19th December 2009, 02:35 PM

Nah, velcro sucks.

What about if it opened by twisting it?

So rather than a hinge one end it has a pin in it about half way along one side. You twist it open. When closed the other side that doesn't have a pin has an overlapping edge that prevents it from opening backwards.

If it was steel/alloy it would be strong enough that each face would stand up to the pressure without bending.

Have a look at my diagram.

Fairfield · 19th December 2009, 02:57 PM

I like it....... how in the world do you make the step cut onto that thin piece of plastic?? Going to have to wrap my hea around this one tomorow as I dig myself out of a foot or two of snow

FlashD · 20th December 2009, 08:28 AM

Why don't you use the pin idea and just use a pin to lock it on the opening side. It would swivel on one pin and use a pin through holes on the opposite side to lock it closed around the line. Or you could use a oval screw link so it's locking and the pin won't fall out.

Eric Frei · 20th December 2009, 10:49 AM

Yep, I fgure steel or aluminium, maybe 8mm thick and pehaps only 80mm dia

Wont weigh much but weight is not the issue as no-one really has to hold it.

A spring loaded locking pin on the other side eh or perhaps a simple screw.

19th December 2009, 09:08 AM	#1
Fairfield Semi-mature vigorous tree Join Date: Mar 2007 Location: Bucks county Pa USA Posts: 125	prusik minder for the non-prusik minding pulley My rescue team has been testing this little plastic piece out for a little bit. I myself have not had it grow on me much. It is good for when you have min man power, but have been having a problem with it poping off. I think I just have to smooth out the hole a little. What are some thoughts on this. Attached Thumbnails __________________ Hi yes you know me I am B.A.M.F nice to meet you

19th December 2009, 11:01 AM	#2
Eric Frei Admin - Razor sharp and independent 2 X Diploma Level 5 qualified arborist Join Date: Jan 2007 Location: Brisbane Posts: 12,820	Re: prusik minder for the non-prusik minding pulley Interesting, I have been thinking of something similar. The split on one side to get it on and off will be where it opens up and pops off, need to think up a way of preventing that. I have been thinking of a metal model with a hinge and quick clamp. You close it and use one of these type of gizzmos to clamp it closed. Attached Thumbnails __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

19th December 2009, 12:39 PM	#3
FlashD Semi-mature vigorous tree Join Date: Feb 2008 Location: Kansas Posts: 213	Re: prusik minder for the non-prusik minding pulley Both, very interesting idea.

19th December 2009, 01:01 PM	#4
Fairfield Semi-mature vigorous tree Join Date: Mar 2007 Location: Bucks county Pa USA Posts: 125	Re: prusik minder for the non-prusik minding pulley Ekka, what do you think about velcrow? light cheap and you can get alot from one roll. __________________ Hi yes you know me I am B.A.M.F nice to meet you

19th December 2009, 01:02 PM	#5
Fairfield Semi-mature vigorous tree Join Date: Mar 2007 Location: Bucks county Pa USA Posts: 125	Re: prusik minder for the non-prusik minding pulley HOLY CRAP 100 posts!! __________________ Hi yes you know me I am B.A.M.F nice to meet you

19th December 2009, 02:35 PM	#6
Eric Frei Admin - Razor sharp and independent 2 X Diploma Level 5 qualified arborist Join Date: Jan 2007 Location: Brisbane Posts: 12,820	Re: prusik minder for the non-prusik minding pulley Nah, velcro sucks. What about if it opened by twisting it? So rather than a hinge one end it has a pin in it about half way along one side. You twist it open. When closed the other side that doesn't have a pin has an overlapping edge that prevents it from opening backwards. If it was steel/alloy it would be strong enough that each face would stand up to the pressure without bending. Have a look at my diagram. Attached Thumbnails __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

19th December 2009, 02:57 PM	#7
Fairfield Semi-mature vigorous tree Join Date: Mar 2007 Location: Bucks county Pa USA Posts: 125	Re: prusik minder for the non-prusik minding pulley I like it....... how in the world do you make the step cut onto that thin piece of plastic?? Going to have to wrap my hea around this one tomorow as I dig myself out of a foot or two of snow __________________ Hi yes you know me I am B.A.M.F nice to meet you

20th December 2009, 08:28 AM	#8
FlashD Semi-mature vigorous tree Join Date: Feb 2008 Location: Kansas Posts: 213	Re: prusik minder for the non-prusik minding pulley Why don't you use the pin idea and just use a pin to lock it on the opening side. It would swivel on one pin and use a pin through holes on the opposite side to lock it closed around the line. Or you could use a oval screw link so it's locking and the pin won't fall out.

20th December 2009, 10:49 AM	#9
Eric Frei Admin - Razor sharp and independent 2 X Diploma Level 5 qualified arborist Join Date: Jan 2007 Location: Brisbane Posts: 12,820	Re: prusik minder for the non-prusik minding pulley Yep, I fgure steel or aluminium, maybe 8mm thick and pehaps only 80mm dia Wont weigh much but weight is not the issue as no-one really has to hold it. A spring loaded locking pin on the other side eh or perhaps a simple screw. Attached Thumbnails __________________ Protect your rights to work - Join Australian Tree Association My businesses:- Qualified Brisbane Tree Lopping \| Stump Grinding Brisbane \| Brisbane - Gold Coast Consulting Arborist

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