Agitating – In vacuum chamber
Patent
1996-09-05
1998-08-25
Cooley, Charles E.
Agitating
In vacuum chamber
B01F 1306
Patent
active
057976805
ABSTRACT:
A system for mixing bone cement is disclosed. Dry PMMA powder and MMA liquid are mixed in a vacuum chamber. Gas from the mixture is vacuum drawn from the mixer by a vacuum source through a vacuum tube which extends between the mixer and the vacuum source. The vacuum source is actuated by creating a positive pressure pulse in the vacuum tube. The pressure pulse may be caused by closing the lid of the mixer, by squeezing an in-line pressure bulb in the vacuum tube or by squeezing a pressure bulb joined to the vacuum tube. The vacuum source is automatically deactivated when a positive vacuum pulse is detected. The second pressure pulse is caused when the vacuum tube is disconnected from the vacuum chamber.
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Cooley Charles E.
Hooker, P.C. Thomas
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