Apparatus for mixing bone cement in vacuum
First Claim
1. An apparatus for mixing bone cement in a vacuum comprising:
- (a) a mixing container;
(b) means on the mixing container for connecting the mixing container to a vacuum source;
(c) a vacuum container surrounding the mixing container;
(d) a piston having an upper side and an underside positioned in the mixing container;
(e) a first space forming a mixing space being formed in the mixing container on the upper side of the piston and a second space being formed on the underside of the piston;
(f) means for communicating the first and second spaces with an interior of the vacuum container, whereby the vacuum is the same on both sides of the piston.
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Abstract
This invention relates to an apparatus for mixing bone cement in vacuum, in which mixing takes place in a container (11) from which ready-mixed bone cement (4) is adapted to be ejected by means of a piston (2) in the mixing container (1) for supplying the bone cement (4) to a hollow in the bone wherein a prosthesis is to be fixed by means of the bone cement (4), and the mixing container (1) is connectable to a vacuum device which is adapted to generate vacuum in the mixing container (1) during mixing.
With a view to providing an apparatus of simple and compact design, which permits efficient retention of the mixing container during mixing, the vacuum device comprises a vacuum container (9) in which the mixing container (1) is adapted to be disposed in such a way that the mixing container spaces (3, 6) on both sides (5, 7) of the piston (2) communicate with the interior (10) of the vacuum container (9) whereby the same vacuum is obtained on both sides of the piston (2).
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Citations
10 Claims
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1. An apparatus for mixing bone cement in a vacuum comprising:
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(a) a mixing container; (b) means on the mixing container for connecting the mixing container to a vacuum source; (c) a vacuum container surrounding the mixing container; (d) a piston having an upper side and an underside positioned in the mixing container; (e) a first space forming a mixing space being formed in the mixing container on the upper side of the piston and a second space being formed on the underside of the piston; (f) means for communicating the first and second spaces with an interior of the vacuum container, whereby the vacuum is the same on both sides of the piston. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification