Cam Hand
From: NASA Tech Briefs - 06/01/2016

This robust gripper design has applicability to both robots and as a
prosthetic for the physically challenged.

A durable gripper tool was designed for use by RoboSimian robots intended for
use in disaster scenarios that demand high-force, robust manipulation. The
resulting Cam Hand fills a previously unaddressed niche that emphasizes grip
strength and robustness over dexterity. The design uses a number of unique
features to ensure high operational flexibility. While this gripper was
created for use on a robot, its basic design could be refined for other
applications; in particular, as a new class of prosthetic that would exist
between the traditional hook and pinch models and the dexterous models
currently under development.

Read the entire article at:
http://www.techbriefs.com/component/content/article/ntb/tech-briefs/machinery-and-automation/24809

Links:
RoboSimian Cam Hand
https://portfolium.com/entry/rescue-robots

Grippers
http://www.motivrobotics.com/products/#/products/grippers