Patent ID: 8500665

Claim:
An instrument for applying vibrations to the human body, comprising: a housing having a distal end, a ram arranged in said housing at said distal end in axially movable fashion, said ram being able to execute a stroke of at least 1 mm, and a drive device for setting said ram in a reciprocating motion, said drive device comprising an axially movable projectile arranged proximally of said ram and an accelerating device for said projectile for accelerating said projectile distally in direction to said ram, wherein said ram is biased in its rest position in said housing by an elastic element, from which rest position said ram can be propelled distally by an impact of said projectile, wherein said elastic element is configured as a bellows at least partially surrounding said ram, and wherein said bellows has a plurality of rounded folds, wherein said folds are reinforced by O-rings inserted in said folds.