Electrostatic clutch

US10749450B2 · kind B2 · utility

Assignee

• CARNEGIE MELLON UNIVERSITY, a Pennsylvania Non-Profit Corporation · US

Inventors

• Carmel Majidi · Berkeley, US
• Steven H. Collins · Pittsburgh, US
• Stuart Diller · Pittsburgh, US

Key dates

• Filing date: Jun 3, 2019
• Grant date: Aug 18, 2020
• Expiry date: Jun 3, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D28/00
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An electrostatic clutch is described comprising a plurality of micron-scale thickness electrodes, adjacent electrodes being separated by a thin film of dielectric material. A power source and controller apply a voltage across two electrodes, causing an electrostatic force to develop. When engaged, a force can be transferred through the clutch. A tensioning device maintains the alignment of the clutch when the electrodes are disengaged, but permits movement in at least one direction. In some embodiments, multiple clutches are connected to an output to provide variable force control and a broad range of torque input and output values. Moreover, the clutch can be used as an energy-recycling actuator that captures mechanical energy from negative work movements, and returns energy during positive work movements.