Demonstrative Evidence for Personal Injury Case

Waltz Law had a problem with this personal injury case. Dick Waltz needed to demonstrate how a person could possible injure themselves while using this complex and heavy piece of equipment. A full sized physical model was needed in order to have all of the geometry easily demonstrated in the courtroom.

This is called a “Tongs” and is run using hydraulics. the center feet clamp onto a pipe and when the lever is pushed, the tool spins that pipe with a huge amount of force and torque.

Several elements of this models had to be moveable to show how the equipment operates. The doors opened and closed, the teeth rotated along with the entire top cover plate, also the activation lever had to function like the actual lever where it can be pushed in either direction and springs back to neutral. The entire model also had to be light weight while maintaining the look and geometry of the actual equipment.

We used different weights of urethane foam along with wood, metal and 3D printed parts to create this model. Care was taken to make all the dimensions accurate and to allow the movements to be easily manipulated. I won’t go into the details of the case since our job was to provide an accurate model that either side could use to make their arguments. Our client was very pleased with our work and wrote the following email to me:

“As I believe you know, this case settled last week. I cannot express how much I appreciated you and your staff’s hard work in designing and developing the exemplar power tongs. They were the proverbial “hit” at the courthouse in Greeley and were very useful during our opening statement and with the witnesses and Plaintiffs’ counsel. Enjoy your summer and I hope that we have an opportunity to work together again in the future.”