Patent ID: 7823499

Claim:
An actuator comprising at least one fluid seal designed to separate fluids under different pressure, the actuator further comprising a pressure chamber, wherein the fluid seal comprises a surface tension seal ( 1 , 14 , 16 , 21 , 32 , 44 , 47 , 56 ) relying on surface tension forces to resist an actuation pressure, and a pressure divider between the surface tension seal ( 1 , 14 , 16 , 21 , 32 , 44 , 47 , 56 ) and a pressure chamber ( 6 , 12 , 37 , 45 , 51 ), the pressure divider comprising at least one leakage channel ( 2 , 20 , 33 ) and at least one pressure restriction ( 4 , 23 , 35 ) designed to prevent leakage at the surface tension seal.