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What has brought you to Open Prosthetics (check all that apply)?
If you checked in the above question that you are an amputee, please specify here, what type of amputee you are
Left Arm Below Elbow
Please check all of the following areas of interest that you are interested in.
Helping with projects, Getting help

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Darryl's Blog

APRL you tube video

Posted on January 30, 2009 at 7:25pm 8 Comments

Jan 30, 2009

Hey all, there were a few members interested in understanding how the APRL works and is used. I made a video with a few details showing some of it's functions. I hope those who are interested get a better understanding of its functionality. You can find the video here:

Just copy and paste.

Good luck,

September 22, 2008 Edited Jan 13, 2009

Posted on January 13, 2009 at 7:28pm 4 Comments

I was thinking more about this whole prosthetic problem. We can no longer rely on the government to make advances in technology. The APRL, developed by the US Army in response to WWII amputees, has not stepped up to the plate again. We need to help ourselves, and with the help of many volunteers and others, who can offer private technical assistance, we can make these necessary advances that so many of us need. If there is anyone out there willing and able to help update, not only the APRL, but… Continue

Terminal devices

Posted on January 5, 2008 at 7:29pm 7 Comments

Well, well, where do I start?

I have been a left arm below elbow amputee for over 17 years and am using a voluntary closing APRL hook developed by th US army after World War 2. It is currently manufactured by Hosmer and has not had any changes made since its inception over 55 years ago. I am seeking design and manufacture help to increase this hook's quality an longevity.

A bit of my history with the APRL:

After I had my accident which caused the need for…


Comment Wall (8 comments)

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At 6:39pm on December 23, 2008, Zachary Archambault said…
Darryl -

I've updated the project site; thanks for sending me the hook. I've been spending a (little!) time on it, due to the storms and holidays I haven't had too much to devote. One thing that I need to know is, how is the hook used? How much weight could you pick up with the hook, do you use it as a hook and carry around buckets, are there cases where you might pick up a heavy item like you would a hammer? I'm trying to work into some local prosthetic contacts to see if I can get a better understanding of how these are used; if you could offer any guidance, it would be much appreciated.
At 10:28pm on December 10, 2008, Zachary Archambault said…
Darryl - just got the APRL hook today; looks like it's had it! I haven't had a chance to get it open yet, but it looks like the locking mechanism is worn out as well as both of the hooks being broken off.
thanks for shipping it out - I'll get started on this soon, very excited to work on this project.

At 1:44pm on December 7, 2008, Jon Kuniholm said…
Zachary and Darryl -

I'm really glad that you guys are getting to work on this. If you can also post updates to the wiki page here:
then it will be easier for folks to keep track and contribute.

Also - we've got another project going that involves hook design, in which we're planning on making a couple of updates (like a rubber insert on the outside for holding down paper to write on, eg). Not sure the best way to go about it but I'd like to try to make more hook options modular so that they could be used for models like this and the ETD, that uses the same fingers and attachment method. It seems to me like the attachment method here is one of the things that needs to be fixed, as the APRL seems to break on the attachment boss on the casting.

Anyway, great to see stuff happening here!

(I'll post this on both of your pages)
At 4:00pm on November 28, 2008, Zachary Archambault said…
ok - just sent another email.

thanks for sending it over - i cant wait to get to work on it

At 11:11pm on November 26, 2008, Zachary Archambault said…
Darryl, did you get the email i sent last week, or did it get filtered out? i know i've got some emails that i haven't responded to either, i just wanted to make sure it got there. just in case, my address is:

106 Rocky Hill Rd
Somersworth NH 03878

At 10:05pm on November 16, 2008, Zachary Archambault said…
Darryl, do you have any non-functioning hooks for me to take a look at so i can create some 3d models and start working on this? I don't know basic dimensions like hook length, stuff like that i wouldn't want to change unless I had to so the redesigned hook would behave in the same way the APRL does, you obviously use it because you like the way it works, it just needs to work that way longer.
At 10:43pm on January 4, 2008, Sean McHugh said…
I never tried the APRL, but I'd like to take one for a test drive.
At 10:42pm on January 4, 2008, Sean McHugh said…
Hey Buddy,
I'm 6 yearsinto this. not even half of your experience, but like you, I'm all about function with no cares about how it looks. Big hookshake to ya brother hookman, even if yours is on the non-handshake side!



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