Patent ID: 7322272

Claim:
A piston for a power cylinder able to be operated by fluid force, comprising two coaxial and radially yielding sealing lips extending axially away from each other and adapted for sealing engagement with the piston engaging face of the power cylinder, and an elastic buffer body arranged in the vicinity of at least one terminal piston face and adapted to serve for impact damping in the end of stroke position of the piston, said buffer body having an impact face turned away from the piston, wherein the sealing lip itself constitutes the buffer body and is provided at the end with the impact face, and wherein several groove-like recesses, opening to the impact face, are formed on the inner periphery of the sealing lip with a distribution in the peripheral direction, said recesses having a depth less than the thickness of the sealing lip whereby the recesses do not extend through the sealing lip to the outer periphery of the sealing lip.