Patent ID: 7121538
Filing Date: 2006-10-17
Classification: F16F

Abstract:
1. Arrangement in a pressing tool for braking a piston/piston rod (D 1 ) of a gas-filled spring (D) and thereby also the return movement of a sheet metal holder (B) supported thereon after pressing has been performed, wherein the gas-filled spring (D) is designed with a separate brake cylinder part (E) and brake piston part (F), in which the brake cylinder part (E) is situated adjoining the outer end of the gas-filled spring (D) and in which the brake piston part (F) is situated adjoining the inner end of the piston rod (D 1 ), whereby during an initial phase of the return movement, the brake cylinder part and the brake piston part are separated from each other, and whereby during a final phase of the return movement, the brake cylinder part and the brake piston part unite so as to form an annular brake/damper chamber, which is substantially sealed from a remainder of the internal space of the gas-filled spring, such that the piston/piston rod is braked only during said final phase of the return movement.