Hemostat by CaptainKirk

Hemostat

CaptainKirk

113

Likes

1163

Downloads

3786

Views

Published on October 31, 2011

This thing was Featured on October 31, 2011

Description

This is a latching hemostat. It works, but I wouldn't use it for medical purposes. :-)

Offset the handles a bit to unlatch.

It's based on a design by the former ICI Ltd. whose patent has expired.

Makes a handy clamp for small things. Yet another chip clip? You could modify it so the jaws close to a fixed opening if you're holding things together for gluing...

Because of the nature of the plastic (I used ABS) the hinge has a limited life. I kept flexing one until it broke, about 70 flexes. When it breaks, print another.

Instructions

Print & trim. I added the wings because in earlier attempts the tips and the latch mechanism would curl up off the built platform. I didn't want to do the amount of trimming a raft would require.

The size is about as large as my Thing-O-Matic can print, about 10 cm (4 inches) long. It can probably be scaled down some, but keep an eye on the hinge mechanism. If it gets too thin it probably won't work too well.

Tags

This Thing has no tags.

Report as inappropriate

Puck on May 13, 2013 said:

I just printed it at .3mm with 100% infill and there was absolutely no hinge at all.

brackett27 on April 29, 2013 said:

Sorry to say that my attempt to make this was a fail. The PLA snaps out of the gate at every joint upon first try. I may try it again in nylon to see if that makes a difference. If you were to post your CAD file one might be able to engineer a different joint system for it.

cymon on May 13, 2012 said:

The curling wings were a stroke of genious. But my ABS print snapped at the joing the first time I tried clipping it together.

VeryWetPaint on January 9, 2012 said:

Thanks for uploading a version without the 'wings' on it. I had real trouble with the wings on my SD300 because the laminated PVC-type material was too resilient to snap them off. I tried trimming them with scissors but I couldn't cut away close enough for the clamp to work.

Now I built the "Hemostat no wings" version and it works great! I posted a video of it at https://www.youtube.com/watch?...

BenJackson on November 5, 2011 said:

I printed one but a coworker broke it at the middle hinge before realizing how delicate it was.

After it came apart I realized it could be stronger if the middle hinge was built like a knuckle joint with only a thin wall to hold the pieces together (not serving as a hinge). Here's a sketch of the idea. I'm not sure exactly what the geometry should be for the thin holding part.