"The masseter"

motivation

NASA uses zip ties as a quick and effective means to securing cables and other equipment to the outside of the International Space Station (ISS). Upon removal, the astronauts must ensure the zip ties do not become space debris that could hinder future space missions. For this reason, NASA has extended this design problem to teams of undergraduates at various universities with the goal of designing a novel tool which safely cuts and secures a zip ties. The Masseter, named after the strongest muscle in the jaw, is the proposed device intended for the cutting of zip ties by astronauts during spacewalks outside of the ISS.

proposed Solution

Our initial design utilized the same mechanism found in quick-grip clamps to translate a metal bar relative to the handle. This motion imparts mechanical leverage from grip strength and converts it to a clamping motion which pulls the jaws closer together, bringing the zip tie towards the cutting edge via teeth. The retainer then traps the severed zip tie, preventing it from floating away.

Documents

NASA Micro-g NExT

• Proposal