公开(公告)号：US20210361929A1

公开(公告)日：2021-11-25

申请号：US16767106

申请日：2018-11-23

申请人： ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)

发明人： Jonathan CHAVANNE ,  Yoan CIVET ,  Yves PERRIARD

IPC分类号： A61M60/486 ,  H01L41/053 ,  A61M60/161 ,  A61M60/289

摘要： A spring (3, 3′) comprising a plurality of elements (30), each element (3) comprising a rigid portion (31) and a flexible beam (32), the extremities (320, 321) of the flexible beam being supported by the rigid portion (31), the flexible beam (32) having a single stable position, so that the flexible beam can be deformed when a pressure is exerted between said extremities in the direction of the rigid portion (31), and returns to said single stable position when the pressure is released, and wherein the rigid portion (31) of at least one element (30) is in contact with the flexible beam (32) of the next element between said extremities (320, 321) of the flexible beam (32), so that the spring has a negative stiffness over an operating range. The arrangement ensures a pure radial compression/expansion of the spring.

公开(公告)号：US20220393098A1

公开(公告)日：2022-12-08

申请号：US17773067

申请日：2020-10-30

申请人： ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)

发明人： Yves PERRIARD ,  Jonathan CHAVANNE ,  Yoan CIVET ,  Morgan ALMANZA

IPC分类号： H01L41/193 ,  H01L41/09 ,  H01L41/047 ,  H01L41/083

摘要： A dielectric elastomer actuator comprising: a plurality of polymer layer; a plurality of stretchable electrode layers, each polymer layer being sandwiched between two electrode layers so as to control the electric field within the polymer layer; at least one stretchable charge distribution layer, each charge distribution layer being adjacent to one stretchable electrode layer and/or to one polymer layer.