초록 ▼

Apparatus for storing, mixing, and dispensing a two-component bone cement includes a first component supply section, a mixing section, and a drive base. One or more ampules of the first (liquid) component, provided within the first component supply section, are broken or cut when a lever is rotted.

Apparatus for storing, mixing, and dispensing a two-component bone cement includes a first component supply section, a mixing section, and a drive base. One or more ampules of the first (liquid) component, provided within the first component supply section, are broken or cut when a lever is rotted. The second (powder) component is provided within the mixing section. During the mixing process, a vacuum is applied within the mixing section, assisting in the delivery of the first component through a filter while preventing the passage of broken glass or plastic from the ampules. Mixing is done by a pair of paddles and a helical wire spring rotating within the mixing station, being driven in one direction, or in alternating opposite directions of rotation, by the drive base. The resulting mixture is dispensed by placing the mixing station, without the drive base and the first component supply section, into a dispensing gun, which drives a shaft moving a piston within the mixing section to dispense the mixture through a dispensing tube while collapsing the helical spring. A plug within the piston is pushed through the dispensing tube to clear the mixture remaining therein. In an alterative arrangement, mixing occurs under vacuum conditions in a bowl having an internal surface similarly scraped with a flexible wire.

대표청구항 ▼

[ What is claimed is:] [1.] Mixing apparatus comprising:a mixing housing including a cover portion having an internal surface following a shape of a surface of revolution about a first axis;a mixing rotor mounted within said cover portion of said mixing housing to rotate about an axis of rotation co

[ What is claimed is:] [1.] Mixing apparatus comprising:a mixing housing including a cover portion having an internal surface following a shape of a surface of revolution about a first axis;a mixing rotor mounted within said cover portion of said mixing housing to rotate about an axis of rotation coaxial with said first axis, with said mixing rotor including a first paddle; anda wire spring extending between opposite ends of said mixing rotor and rotating with said mixing rotor while being held in sliding contact with said internal surface.