Our rotary viscous dampers can provide damping for linear movement also. For example a cylinder needs to stop smoothly without jerking or banging, we can add a pivot arm to accept linear motion to rotate the damper. One way clutches can provide a way to reset the damper quickly , so it’s ready for another cycle.  We can incorporate gearing to change the ratio of stroke to damping rotation.  So our rotary viscous damper are flexible enough to be used as a linear motion braking system.  see us at www.mmtech.us or call at 203-406-7900.  We can meet your damping and friction hinge needs.