Patent ID: 8128275

Claim:
A device at a bone cement mixer, wherein: the bone cement mixer ( 1 ) comprises at least one mixing space ( 5 ) for mixing of powder and liquid components ( 2 , 4 ) to make bone cement, the powder component ( 2 ) is placed in the mixing space ( 5 ) and the liquid component ( 4 ) in a liquid container ( 3 ), and the liquid component ( 4 ) can be transferred from the liquid container ( 3 ) to the mixing space ( 5 ) and the powder component ( 2 ) placed therein, the liquid container ( 3 ) is an aerosol container ( 15 ) and contains, in addition to the liquid component ( 4 ), a propellant gas for pushing the liquid component ( 4 ) out from the aerosol container ( 15 ) into the mixing space ( 5 ), the aerosol container ( 15 ) has a connecting element ( 16 ) with a closing wall ( 21 ) which closes the aerosol container ( 15 ), the aerosol container ( 15 ) is adapted to being opened when it is connected to a corresponding connecting element ( 17 ) on the bone cement mixer ( 1 ), the connecting element ( 17 ) of the bone cement mixer ( 1 ) has a seal ( 23 ) which closes the mixing space ( 5 ) of the bone cement mixer ( 1 ) and an opening means ( 22 ) which, when the connecting element ( 16 ) of the aerosol container ( 15 ) is connected to the connecting element ( 17 ) of the bone cement mixer ( 1 ), uses a single end to push up first a hole in the seal ( 23 ) and then in the closing wall ( 21 ) in the connecting element ( 16 ) of the aerosol container ( 15 ), such that the propellant gas in the aerosol container ( 15 ) can push the liquid component ( 4 ) out from the space ( 18 ) in the aerosol container ( 15 ) and into the mixing space ( 5 ), and the aerosol container ( 15 ) being connectable to a bone cement mixer ( 1 ) which has a delivery means ( 8 ) in the form of a piston which is anchorable relative to the bone cement mixer ( 1 ) and which can be released from the latter after the mixing of the powder and liquid components ( 2 , 4 ), so that the delivery piston ( 8 ) can move and/or be moved relative to the mixing space ( 5 ) of the bone cement mixer ( 1 ), the connecting element ( 17 ) of the bone cement mixer ( 1 ) being disposed on the delivery piston ( 8 ) to mechanically connect the bone cement mixer ( 1 ) to the aerosol container ( 15 ) wherein the opening means push in the same direction through the seal ( 23 ) and the closing wall ( 21 ).