Hydraulically Amplified Self-healing Electrostatic Actuators

2022

Patent

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An electro-hydraulic actuator includes a deformable shell defining an enclosed internal cavity and containing a liquid dielectric, first and second electrodes on first and second sides, respectively, of the enclosed internal cavity. An electrostatic force between the first and second electrodes upon application of a voltage to one of the electrodes draws the electrodes towards each other to displace the liquid dielectric within the enclosed internal cavity. The shell includes active and inactive areas such that the electrostatic forces between the first and second electrodes displaces the liquid dielectric within the enclosed internal cavity from the active area of the shell to the inactive area of the shell. The first and second electrodes, the deformable shell, and the liquid dielectric cooperate to form a self-healing capacitor, and the liquid dielectric is configured for automatically filling breaches in the liquid dielectric resulting from dielectric breakdown.

@patent{PCT-US2022-11408452,
  title = {Hydraulically Amplified Self-healing Electrostatic Actuators},
  author = {Keplinger, Christoph Matthias and Acome, Eric Lucas and Kellaris, Nicholas Alexander and Mitchell, Shane Karl},
  number = {US Patent 11408452},
  month = aug,
  year = {2022},
  doi = {},
  url = {https://patentimages.storage.googleapis.com/6e/82/f2/d640deaf7d4a6f/US11408452.pdf},
  month_numeric = {8}
}