Patent ID: 7073936

Claim:
An apparatus for mixing batches of a liquid and a powder component for preparation of bone cement, comprising: a mixing vessel pre-filled with the powder component of the bone cement, said vessel defined by an outer wall having a top end, a bottom end and an interior, said top end formed with a sealable spout, said bottom end formed with an axially displaceable bottom; a vacuum source connected to the interior of said mixing vessel for maintaining the interior of said mixing vessel under vacuum; an agitator at least partially disposed within said vessel interior, said agitator comprising a tubular rod which extends upwardly out of said interior through said spout, and an agitator disk attached to said tubular rod and disposed within the interior, a first end of said tubular rod being open and defining a mouth, and a second end of said tubular rod being open and encircled by said disk, and said tubular rod is axially displaceable within said vessel interior; a generally cylindrical container having a top, a bottom, and an interior; a glass ampoule having a sealed interior and a tip, said sealed interior containing the liquid bone cement component, said ampoule received within said interior of said container; and a cap secured to the top of said container, said cap having an opening therein whereby atmospheric air is communicated through said cap and into said interior of said container.