After a few hours of work these are the basics parts of the design that I cam up with. The hand and gripper finger portions of the manipulator will be 3D printed and attach to a PVC arm and motor housing much like some of the other manipulators that I've done in the past.
This is what the parts will look like when assembled.
Here are a few cut away views to show how it works.
It will work of the same thread rod principle I have also used in the post. The actuator rod (not shown) will thread into the red slide block.
I've already printed out some of the parts at this point.
The basic mechanics seem like they are going to work I just need to print the main body of the hand. This will probably take a good 4-5 hours so I just need to find the time to do this now.
-Steve