| 摘要 |
The present invention relates to a mixing device for producing bone cement by mixing components intended therefor, wherein the bone cement ( 3 ) is made by mixing the components ( 4, 5 ) under a vacuum in a mixing space ( 6 ), and wherein the mixing space ( 6 ) includes at least one piston ( 9 ) which can be brought to remain in a start position (A) during mixing and which is releasable therefrom after mixing, whereby said piston ( 9 ) will be sucked into the mixing space ( 6 ) by being affected by the vacuum prevailing therein. At least one throttle device ( 20 ) is provided for generating a pressure drop between the air pressure in the surroundings and the piston ( 9 ) for preventing full power affection thereof by said air pressure. At a method in connection with said device, the piston ( 9 ) is brought to remain in the start position (A) during mixing of the components ( 4, 5 ) by air-tight isolation thereof from the surroundings. The piston ( 9 ) can be released from the start position (A) by opening the air-tight isolation.
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