PISTON-TYPE REGULATOR DAMPER MECHANISM WITH HIGHER BRAKING ACTION AT THE BEGINNING OF THE STROKE

As piston 1 travels in cylinder 2, filled with a viscous liquid, a braking effect is obtained. Since in its extreme lower position, piston 1 contacts plate 3, in its upward stroke it must overcome the cohesive forces in the layer of liquid between the piston and plate. This increases the braking force at the start of the stroke.
$3635$SHP,DC$