Maxime BUREAU,Thierry KELLER,Jan F. VENEMAN,Carolina VERA MARTIN
申请号：
US14369766
公开号：
US20150369325A1
申请日:
2013.03.15
申请国别(地区):
US
年份:
2015
代理人:
摘要：
Element with variable stiffness controlled by negative pressure, the element including a gas-tight envelope, a plurality of flexible layers in the envelope, each layer having a first surface and a second surface, and, a valve adapted to evacuate the interior of the envelope, where the first and second surfaces of two adjacent layers have a friction coefficient between each other which is higher than 0.5, the first and second surfaces of two adjacent layers have adhesion properties, such that a normal force per unit area of below 0.07 N/mm2 is required to separate them and/or the energy per unit area required to separate them in normal direction is below 6.7 J/m2.
