Patent ID: 7938572

Claim:
Device for producing a hardenable mass of bone substitute and/or bone reinforcing material or bone cement or similar material, including: a mixing container, said mixing container including a mixing space configured to receive at least one powder and at least one liquid component to produce the hardenable mass, a piston, said piston being located in the mixing space of the mixing container, and at least one rotatable element, said rotatable element configured to rotate relative to the mixing container and co-operate with the piston such that, in a retaining position, said piston is axially retained relative to the mixing container and, by rotation of the rotatable element to a release position, the piston is released such that said piston is configured to move in a direction towards at least one opening of said mixing container, said opening configured to allow passage of said hardenable mass out of the mixing space, wherein the rotatable element is configured such that in the release position, the rotatable element is configured to move with the piston in the mixing space in the direction towards said opening.