The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2014
Filed:
Aug. 31, 2011
Hiromitsu Takeuchi, Kiyosu, JP;
Takashi Maeno, Kiyosu, JP;
Naoto Kuriyama, Kiyosu, JP;
Takanori Nakai, Kiyosu, JP;
Yutaka Tsuchikawa, Kiyosu, JP;
Yoji Kimura, Kiyosu, JP;
Hiromitsu Takeuchi, Kiyosu, JP;
Takashi Maeno, Kiyosu, JP;
Naoto Kuriyama, Kiyosu, JP;
Takanori Nakai, Kiyosu, JP;
Yutaka Tsuchikawa, Kiyosu, JP;
Yoji Kimura, Kiyosu, JP;
Toyoda Gosei Co., Ltd., Aichi-pref., JP;
Abstract
An actuator includes a sheet having dielectric elastomer layers and conductive rubber layers provided on the front and back faces of each dielectric elastomer layer. The sheet is wrapped and rolled about a coil spring. The actuator expands the rolled sheet along an expansion direction of the coil spring by applying a voltage to the conductive rubber layers on the front and back faces of the dielectric elastomer layer, and contracts the rolled sheet along a contraction direction of the coil spring by stopping the application of the voltage. The actuator further includes a fiber layer located between the coil spring and the rolled sheet wrapped about the coil spring.