Electrostatic clutch
First Claim
1. An electrostatic clutch for use in an energy-recycling actuator, the clutch comprising:
- a first electrode comprising a conductive film,wherein the first electrode is associated with a housing;
a second electrode comprising a conductive film,wherein the second electrode is associated with an object not connected to the housing;
a third electrode comprising a conductive film,wherein the third electrode is positioned between the first electrode and the second electrode,wherein the third electrode is connected to an energy storing device connected to the housing;
a dielectric material separating the third electrode from the first electrode and the second electrode; and
a power source for applying an electric field across at least two of the first electrode, the second electrode, and the third electrode to develop an electrostatic charge.
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Accused Products
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.
11 Citations
11 Claims
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1. An electrostatic clutch for use in an energy-recycling actuator, the clutch comprising:
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a first electrode comprising a conductive film, wherein the first electrode is associated with a housing; a second electrode comprising a conductive film, wherein the second electrode is associated with an object not connected to the housing; a third electrode comprising a conductive film, wherein the third electrode is positioned between the first electrode and the second electrode, wherein the third electrode is connected to an energy storing device connected to the housing; a dielectric material separating the third electrode from the first electrode and the second electrode; and a power source for applying an electric field across at least two of the first electrode, the second electrode, and the third electrode to develop an electrostatic charge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification