Actuator has a quarter turn a pinion which is not cylindrical and cremaillere complementary

摘要

The invention relates to an actuator including a housing (1), four pistons (2A, 2B, 2'A, 2'B) which jointly move, two by two, in opposite directions in the housing due to the pressure of a fluid, and which are translatably secured to the respective racks (2, 2') that engage with a pinion (4), wherein the radius of curvature of a first portion of the profile of the pinion (4) is greater than the radius of curvature of a second portion of the profile of the pinion (4).