Objective:  Create a grabber to lift weight.

Requirements:

Minimize operator input to connect device to block

Ensure reliable lift using friction along block sides

Minimize cost and build time.

Design Evolution:

Initial concept: log lifting claw

Issue: geometry lacked sufficient normal force

Solution: inverted design with friction members closer to pivot.

Member lengths optimized for maximum normal force and reliable contact.

Results:  The mechanism was able to maintain grip well past the designed weight. The max weight was applied and the grabber did not slip.  However, the arms did bend.