Bone cement mixing and loading apparatus
AssigneeStryker Corporation
InventorsCharles L. Nelson, Michael W. Steffler, Douglas L. Tyler, Sr.
Life of this patent
Estimating the term…
Abstract
An apparatus for mixing bone cement and containing the mixed bone cement preparatory to dispensing. The mixing chamber has an outlet for the mixed cement. A cartridge has an inlet releasably coupled to the outlet of the mixing chamber for receiving mixed bone cement therefrom. Structure is provided for moving cement from an upper region of the mixing chamber down into a lower region thereof to mix same and for moving such mixed cement off an inner surface of the mixing chamber and into the cartridge.
Claims16
An apparatus for mixing bone cement and containing the mixed bone cement preparatory to dispensing, the apparatus comprising:
- a mixing chamber having means therein for mixing components to form bone cement and means defining an outlet for outputting mixed cement;
- a cartridge having means defining an inlet releasably coupled to the outlet of said mixing chamber for receiving mixed bone cement therefrom;
- a piston having a starting position sealing the outlet of mixing chamber from communication with the inlet of the cartridge, said piston being snugly and sealingly slidable in and along said cartridge away from the outlet of said mixing chamber and ahead of mixed cement therefrom;
- retention means for resiliently holding said piston with respect to said mixing chamber and cartridge in said starting position;
- a rod mounted for longitudinal movement in said mixing chamber and having an end releasably engageable with said piston for advancing said piston out of said starting position and past said retention means and along said cartridge in response to movement of said rod beyond said mixing chamber outlet, to allow mixed cement to enter the cartridge behind the piston.
An apparatus for mixing bone cement and containing the mixed bone cement preparatory to dispensing, the apparatus comprising:
- a mixing chamber having (1) inlet means for receiving components to be mixed and (2) means therein for mixing components to form bone cement and (3) an outlet for mixed cement;
- a cartridge having an inlet releasably coupled to the outlet of said mixing chamber for receiving mixed bone cement therefrom;
- a piston snugly and sealingly slidable (1) from a starting position sealing the outlet of said mixing chamber from communication with said cartridge, (2) along the interior of said cartridge toward a remote end of said cartridge;
- a rod mounted for longitudinal movement in said mixing chamber and having an end releasably engageable with said piston for pushing said piston out of said starting position and along said cartridge in response to movement of said rod beyond said mixing chamber outlet, to allow mixed cement to enter the cartridge.
Dependencies are inferred from the claim text.