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Phase 3: Design Phase

4-16-09



Phase 3: Design Phase



In phase 3 I modeled my ideas in SolidWorks analyzed my ideas in Microsoft Excel and then used my final model to make a rapid prototype. Here are the results of my many hours and late nights:





Here are some of the features my design includes:



1. Wide opening in between fingers for increased visibility.

2. Curved grasping… Continue

Added by Daniel Paulsen on April 16, 2009 at 11:36pm — 6 Comments

Phase 2: Concept Development

4-14-09



It appears that my blog has fallen quite behind. I have already graduated and got my masters degree, but here is a retrospective update on what happened.



Phase 2: Concept Development



In phase 2 I compiled the information I obtained in phase 1 and came up with goals to shoot for with my design. Here are the goals that I came up with in no particular order:



1. Firm grip

2. Narrow well-mating tip

3. Efficient linkage

4. Multiple… Continue

Added by Daniel Paulsen on April 16, 2009 at 11:29pm — No Comments

Making limb more comfortable

I am experiencing pain in the stump and find walking very difficult. Any suggestions as to how to overcome phantom pain and rubbing and bleeding of the stump when wearing the artificial limb.

Added by Laurence Alexander Elks on March 20, 2009 at 7:38pm — 2 Comments

Open Prosthetics in IEEE Spectrum

My article on the tough realities of designing next generation prosthetic arms and the philosophy behind the Open Prosthetics Project is up on IEEE Spectrum online, and will appear in the March issue of the magazine. There are a couple of edits I wasn't thrilled with, but in general I'm pleased.



To quote the sidebar about how everyone can help with OPP:



"While it’s most natural to want to help within your area of… Continue

Added by Jon Kuniholm on March 1, 2009 at 2:33pm — 7 Comments

This is cool!



Plastic Soda Bottle Prosthesis - More DIY How To… Continue

Added by Michael Davidson, MPH, CPO on February 20, 2009 at 9:30am — No Comments

APRL you tube video

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:

http://www.youtube.com/watch?v=b3HNq1tCd4E

Just copy and paste.

Good luck,
Darryl

Added by Darryl on January 30, 2009 at 7:25pm — 8 Comments

September 22, 2008 Edited Jan 13, 2009

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

Added by Darryl on January 13, 2009 at 7:28pm — 4 Comments

Scientific American Article, General Update

I'm going to repeat myself (mostly) from the post I added to the main site; you never know who is looking at what.



For those of you who haven't seen it, our efforts to improve on the well-loved features of the out-of-production Trautman Hook have been profiled in Scientific American Magazine this month. In order to avoid any possibility of confusion with the old Trautman brand, we're going to refer to our new and… Continue

Added by Jon Kuniholm on September 22, 2008 at 8:09pm — No Comments

A New Hook Design, Phase 1: Idea Collection

2/18/08



Phase 1: Idea Collection



Idea collection Phase is in full swing! Here are some of the hook ideas I have collected so far



1) Adjustable or Selectable Prehension. This is an old idea where the user can adjust the pinch force on a VC device. This would allow users to handle both heavy and delicate objects.



2) Detachable third finger. This would allow different modules to attach directly to the device such as a knife holder or different… Continue

Added by Daniel Paulsen on September 7, 2008 at 8:57pm — 5 Comments

A New Hook Design for the 21st Century: Introduction

The first post on blog entries is so awkward. Well, anyways, here is a little background about me: I am a Mechanical Engineering student at San Jose State who is working on my Masters Thesis project. When I was looking for a project I knew I wanted to work on a product that was challenging, and also helpful to people that are often overlooked. Then when I factored in my contacts at Hosmer Dorrance, it was a no-brainer to choose a prosthics project.



My main goals is to provide a… Continue

Added by Daniel Paulsen on February 18, 2008 at 8:00pm — No Comments

Lead User Innovators and Democratizing Innovation

"Lead users," are consumers (individuals or companies) who spur innovation in an industry by contributing innovations often of a greater value and at a faster pace than the companies that produce the products they use. Their innovations are often freely shared and eventually incorporated into products. Far from being an idealist fantasy, lead user innovations can be incorporated into the R&D strategy of a nimble company, enabling quick identification and anticipation of consumer needs. What… Continue

Added by Jon Kuniholm on January 10, 2008 at 6:04pm — No Comments

Opening the Network; Privacy Issues

Some of you may have seen the message that I sent to everyone on the network requesting feedback on opening the network to Google searches and RSS feeds, and to casual, unsubscribed viewers. I have received some feedback, all positive, and I intend to make the change, barring strenuous objections from anyone within the next week.



As I mentioned, I had originally made the network open to anyone to join, but closed to non-members in order to encourage people to share personal medical… Continue

Added by Jon Kuniholm on January 10, 2008 at 1:29pm — No Comments

Terminal devices

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…

Continue

Added by Darryl on January 5, 2008 at 7:29pm — 7 Comments

Suspension Sleeve

I just got a new suspension sleeve for my gym socket. I ordered a kids' large size below knee neoprene liner from Flexikids instead of the arm suspension liner from Siliopos. IT ROCKS!!!!!!!!

I ordered it online from http://www.amputeesupply.com

It is heavier duty and the knee angle that is built into it fits nicely over my elbow. The Silipos liners blew out quickly. I'll let you know how this one holds up.

Added by Sean McHugh on January 4, 2008 at 3:43pm — No Comments

Open Prosthetics Swag Available; Ideas Anyone?

I uploaded a couple of designs to Cafe Press and created a storefront there to sell OPP and SDA shirts and what not. The first two are just the basic logos, but I am open to suggestions and criticism, and please send any other ideas for shirts that you folks have my way, and I'll try to get it together.



One idea I might get up next would say, "Can we talk about something else?" Not that I have, lately...



Five dollars of… Continue

Added by Jon Kuniholm on December 22, 2007 at 3:58am — No Comments

Broken Trautman

I have an original Trautman hook if anybody wants it. A neighbor found it in his barn. It is a right hook with that little flared out tab at the proximal end snapped off and missing. Free to the first to respond. or call me at 610-392-0944.

Added by Sean McHugh on December 18, 2007 at 7:35pm — 3 Comments

You Tube Instructional videos

I have a few videos on youtube that I put up as a resource for upper extremity amps and some of my OT friends. Go to http://www.youtube.com/profile?user=theguywiththehook and let me know what you think.

Added by Sean McHugh on December 4, 2007 at 3:14pm — No Comments

Table Saw

Being a former carpenter, I am still trying to do some furniture building woodworking. While running a small piece through the table saw, my hook bounced off the fence and into the blade. I quickly yanked my hook out, but not before getting a face full of stainless steel. Needless to say my hook faired better than the blade. I guess these things are pretty tough.

Added by J.R. on December 3, 2007 at 4:22pm — 3 Comments

Body Powered Bands

Who is doing the body powered bands research? I have a severed Ulnar nerve on my left hand so I have to use a ton of rubber bands on my right limb prosthetic for grip. I want to know the results of the research before I order a ton of stuff that won't work. Anybody out there have experience with the tubing yet?

Added by J.R. on December 3, 2007 at 4:09pm — 3 Comments

Welcome to OPP

Thanks for checking out the Open Prosthetics Network. I realize that this represents yet another in what's starting to seem like too many tools for enabling collaboration and the free exchange of information about the challenges faced by amputees and the design of better prostheses.



After over a year of letting offers to volunteer, and requests for help or information languish in my in box, I'm hoping that this tool, in particular, helps people make connections that solve problems for… Continue

Added by Jon Kuniholm on November 12, 2007 at 11:20am — No Comments

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