A device, for mixing and dispensing a pasty mass, comprising a cartridge having a mixing element and a feed plunger arranged in it, whereby the mixing element is arranged on a mixing rod, the mixing rod extends through the feed plunger into the inside of the cartridge, the mixing rod and the feed pl
A device, for mixing and dispensing a pasty mass, comprising a cartridge having a mixing element and a feed plunger arranged in it, whereby the mixing element is arranged on a mixing rod, the mixing rod extends through the feed plunger into the inside of the cartridge, the mixing rod and the feed plunger and the cartridge together form a tight connection that seals the cartridge inside of the device with respect to the exterior, whereby the feed plunger is arranged on the mixing rod and such that it can move in the cartridge in axial direction and whereby at least one clamping jaw is arranged on the feed plunger in appropriate manner such that the clamping jaw can be pressed onto the mixing rod by a locking element such that the mixing rod can no longer be shifted with respect to the feed plunger.
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1. A device for mixing and dispensing a pasty mass, the device comprising a cartridge having a mixing element and a feed plunger arranged therein, whereby the feed plunger, being in a starting position, is arranged in a region of a first cartridge end of the cartridge, wherein the mixing element is
1. A device for mixing and dispensing a pasty mass, the device comprising a cartridge having a mixing element and a feed plunger arranged therein, whereby the feed plunger, being in a starting position, is arranged in a region of a first cartridge end of the cartridge, wherein the mixing element is arranged on a mixing rod, wherein the mixing rod extends through the feed plunger into an inside of the cartridge, wherein the mixing rod, the feed plunger and the cartridge together form a tight connection that seals the cartridge inside of the device with respect to an exterior, wherein the feed plunger is arranged such as to be axially mobile on the mixing rod and in the cartridge, wherein the feed plunger comprises a scaling plunger arranged such that the sealing plunger is axially shiftable on the mixing rod and has clamping jaws arranged thereon, wherein the clamping jaws surround the mixing rod such that ends of the clamping jaws are pressable or tiltable against the mixing rod, by means of a locking element, such that the mixing rod is no longer shiftable with respect to the feed plunger, wherein the clamping jaws are pressable against the mixing rod by the ends that face away from a bottom of the sealing plunger, by tilting in the direction of the longitudinal axis of the mixing rod, wherein the clamping jaws are formed through an axially slitted cylinder situated on a top of the sealing plunger and surrounding the mixing rod, wherein the bottom of sealing plunger is located opposite with respect to the top of the sealing plunger, and further wherein the axially slitted cylinder comprises slits that extend from an upper edge of the axially slitted cylinder to the top of sealing plunger. 2. The device according to claim 1, wherein the locking element is a part of the feed plunger and is shiftable on the mixing rod in axial direction with respect to a remaining portion of the feed plunger and, upon the locking element being slid or plugged together with the remaining portion of the feed plunger, presses the ends of the clamping jaws onto the mixing rod such that the mixing rod is no longer shiftable with respect to the feed plunger. 3. The device according to claim 2, wherein a manually-removable spacer is arranged as a securing element between the locking element and the remaining portion of the feed plunger and prevents the locking element and the remaining portion of the feed plunger from being slid together or plugged together. 4. The device according to claim 1, wherein the locking element is arranged on an outward-facing end of the feed plunger. 5. The device according to claim 1, wherein the feed plunger comprises, on an end facing the inside of the cartridge, a sterilisation plunger adjacent to which the mixing element is arranged in the cartridge, wherein the sterilisation plunger comprises at least one gas-permeable exchange surface and is connectable to the cartridge by means of at least one detachable snap-in element. 6. The device according to claim 5, wherein the sterilisation plunger and the sealing plunger and/or the locking element, slid together or plugged together, form an at least two-part feed plunger. 7. The device according to claim 6, wherein the sealing plunger can be plugged onto the sterilisation plunger and in that the locking element can be plugged or slid onto the feed plunger part assembled from the sealing plunger and the sterilisation plunger, while forming a three-part feed plunger. 8. The device according to claim 7, wherein the sealing plunger comprises at least one recess on an outside for accommodating a grasping part of the at least one snap-in means of the sterilisation plunger. 9. The device according to claim 7, wherein the three-part feed plunger system is axially shiftable into the cartridge after an unlocking by means of a pressure in order to move a bone cement dough prepared by mixing bone cement powder and a monomer from the inside of the cartridge towards a cartridge head that is arranged on a second end of the cartridge that is opposite from a first end of the cartridge and includes the second opening. 10. The device according to claim 1, wherein the mixing rod comprises a predetermined breakage site, whereby the predetermined breakage site of the mixing rod is arranged such that the predetermined breakage site is covered by a spacer when the mixing element including the mixing rod is pulled to the end of the feed plunger facing into the inside of the cartridge. 11. The device according to claim 10, wherein the feed plunger and/or the sterilisation plunger comprises at least one vacuum connector that provides a connection from outside through the feed plunger into the inside of the cartridge, whereby a non-return valve is arranged in the vacuum connector. 12. The device according to claim 1, wherein the clamping jaws are tiltable and pressable onto the mixing rod, by the ends of the clamping jaws which are tilted ends. 13. The device according to claim 12, wherein the locking element comprises at least one tiltable clamping jaw that is pressable towards mixing rod by an end of the at least one tiltable clamping jaw. 14. The device according to claim 13, wherein the locking element and/or the sealing plunger comprise at least one element capable of elastic deformation which presses the clamping jaws onto the mixing rod after the locking element is slid together or plugged onto the sealing plunger. 15. A bone cement system comprising the device according to claim 1, wherein the system comprises a reservoir element for a binding agent and a base element, whereby the base element stores and connects the device and the reservoir element. 16. The bone cement system according to claim 15, wherein the base element comprises a coupling means for a non-positive fit- or positive fit-like connection to a dispensing opening of the device. 17. The bone cement system according to claim 15, wherein the reservoir element comprises a valve means configured to control and/or trigger an outflow of the binding agent from the reservoir element. 18. The bone cement system according to claim 17, wherein the base element comprises a tubing, wherein the tubing connects the reservoir element to the inside of the cartridge such that the binding agent is flowable from the reservoir element through the tubing into the cartridge. 19. A method for producing a cement mixture having the bone cement system according to claim 15, the method comprising: A) providing the cartridge with at least regions of which are filled with a powder;D) filling the cartridge with a monomer;E) mixing the powder by means of the mixing element;F) locking the mixing rod in the feed plunger by means of the clamping jaws; andH) dispensing the cement mixture through propelling the feed plunger. 20. The method according to claim 19, further comprising: B) filling a sterilising gas through the gas-permeable exchange surface and sterilising the interior space of the cartridge and the powder after step A) and before step D); and by the cartridge being closed by the sterilisation plunger in step A). 21. The method according to claim 20, further comprising: C) plugging the sealing plunger into the sterilisation plunger after step B) and before step D). 22. The method according to claim 21, further comprising: G) breaking-off the mixing rod locked by means of the clamping jaws after step F) and before step H), whereby the mixing rod preferably is broken off at a predetermined breakage site. 23. The method according to claim 19, wherein the mixing rod in step F) is locked by sliding or plugging the locking element onto the sealing plunger, whereby the locking element presses the clamping jaws onto the mixing rod due to the sliding or plugging. 24. The device according to claim 13, wherein the at least one tiltable clamping jaw of the locking element comprises slits extending radially from a recess of the locking element. 25. The device according to claim 24, wherein the at least one tiltable clamping jaw are formed by an axially slitted cylinder arranged on the underside of the locking element, that faces the top of the sealing plunger.
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이 특허에 인용된 특허 (12)
Hauke Gunter (Muhltal DEX) Specht Rainer (Furth DEX) Krotz Ralf (Wiesloch DEX) Funk Reiner (Munster/Altheim DEX) Martin Peter (Wiesbaden DEX) Nies Berthold (Frankisch-Crumbach DEX), A cylinder for mixing components to form bone cement.
Henniges,Bruce D.; Coffeen,Jared P., Bone cement mixing and delivery system including a delivery gun and a cartridge having a piston, the delivery gun configured to release the piston.
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