초록 ▼

The bone marrow mixing instrument having a handle housing with a trigger mounted thereto. The handle housing contains a ratchet drive feed mechanism with a pawl assembly and a moveable ratchet bar. The other end of the ratchet bar is secured to a mixing housing which holds syringes filled with mater

The bone marrow mixing instrument having a handle housing with a trigger mounted thereto. The handle housing contains a ratchet drive feed mechanism with a pawl assembly and a moveable ratchet bar. The other end of the ratchet bar is secured to a mixing housing which holds syringes filled with material and defines channels leading from the syringe area to a mixing nozzle removably mounted to the mixing housing. A piston rod and piston are mounted in each syringe containing bone defect material with a piston being advanced within the respective syringe by the feed mechanism to discharge bone defect material from the syringe into the adjacent channels in the mixing housing and into the mixing nozzle.

대표청구항 ▼

We claim: 1. A bone marrow mixing instrument comprising: a handle assembly, a mixing housing connected to said handle assembly, a drive mechanism moveably mounted in said handle assembly and secured to said mixing housing, said mixing housing defining chambers to hold syringe tubes of different dia

We claim: 1. A bone marrow mixing instrument comprising: a handle assembly, a mixing housing connected to said handle assembly, a drive mechanism moveably mounted in said handle assembly and secured to said mixing housing, said mixing housing defining chambers to hold syringe tubes of different diameters and material pathways leading from said chambers to a nozzle section of said mixing housing, piston means including a piston rod and a piston head mounted to said piston rod, said piston rod and piston head being slidably mounted in each of said syringe tubes, trigger means pivotally mounted to said handle housing, said trigger means when pulled causing said drive mechanism to sequentially transport said mixing assembly toward said handle assembly, and a locking means mounted in said handle assembly to lock said piston rods in a fixed position. 2. A bone marrow mixing instrument according to claim 1 wherein said piston means comprises a piston rod having segmented parts and a resilient piston head mounted on said piston rod. 3. A bone marrow mixing instrument according to claim 2 wherein said segmented piston rod has a plurality of spaced circular segments. 4. A bone marrow mixing instrument according to claim 1 wherein said drive mechanism is a rachet drive comprising a rachet bar and a pawl. 5. A bone marrow mixing instrument according to claim 1 wherein said piston head is cone shaped. 6. A bone marrow mixing instrument according to claim 1 wherein said locking means comprises a flat base plate with a plurality of L shaped cutouts formed in said base plate to receive and hold said piston rod, an activator shaft integrally formed with said base plate extending outward from said base plate on the opposite side of said base plate from said L shaped cutouts, said activator shaft extending outside of said handle housing. 7. A bone marrow mixing instrument according to claim 1 wherein said mixing housing nozzle section has a nozzle connecting member said nozzle connecting member defining a central chamber which is adapted to be aligned with a nozzle and a nozzle lock structure. 8. A bone marrow mixing instrument according to claim 7 wherein the distal end of said nozzle connecting member central chamber is formed by a circular boss. 9. A bone marrow mixing instrument according to claim 8 wherein a nozzle member having a central throughgoing bore is adapted to be mounted over said circular boss. 10. A bone marrow mixing instrument according to claim 1 wherein a mixing nozzle is mounted at said nozzle section. 11. A bone marrow mixing instrument according to claim 10 wherein said mixing nozzle has a planar locking plate with two curved opposing ends and linear sides and a nozzle with a central throughgoing bore extending from said plate. 12. A bone marrow mixing instrument according to claim 10 wherein said mixing nozzle defines a throughgoing bore with a helix mounted therein. 13. A bone marrow mixing instrument according to claim 12 wherein said helix is curved at about 30째. 14. A bone marrow mixing instrument according to claim 13 wherein said helix mixes bone marrow to a scaffoling material at ratio of about 1 to about 3. 15. A bone marrow mixing instrument according to claim 13 wherein said helix mixes bone marrow to a scaffoling material at ratio ranging from 1:1 to 1:6. 16. A bone marrow mixing instrument comprising: a handle housing and a trigger mechanism rotatably mounted to said handle housing, said trigger mechanism being biased outward by spring means mounted in said handle housing and engaging said trigger mechanism, a rachet drive mounted in said housing, said ratchet drive including a moveable ratchet bar mounted in said handle housing with the a distal end of said ratchet bar being secured to a mixing housing, said mixing housing defining chambers for receiving syringe tubes and channels communicating with said syringe tube chambers leading to a distal end of said mixing housing, a cartridge dispenser mounted in said syringe chamber, said cartridge dispenser comprising a syringe tube handle, a piston head mounted in said syringe tube and a piston rod mounted to said piston head, a drive mechanism mounted in said handle assembly causing said ratchet bar to be sequentially driven by the action of said trigger mechanism rearward through said handle housing causing each said piston head to move in said syringe barrel to dispense material held in said syringe barrel along said mixing housing channels into and through a nozzle mounted to said mixing housing, said nozzle defining a central throughgoing bore with a helix mixing member mounted therein. 17. A bone marrow mixing instrument according to claim 16 wherein said piston rod is constructed with segmented parts. 18. A bone marrow mixing instrument according to claim 16 wherein said piston rod comprises a plurality of spaced circular segments positioned on a central rod. 19. A bone marrow mixing instrument according to claim 16 wherein said helix mixing member is curved at about 30째. 20. A bone marrow mixing instrument according to claim 16 wherein the distal end of said mixing housing is formed with a nozzle connecting member, said nozzle connecting member defining a central chamber with one end of the chamber being formed by a circular boss on an exterior distal end. 21. A bone marrow mixing instrument according to claim 20 wherein a nozzle member having a central throughgoing bore is adapted to be mounted over said circular boss. 22. A bone marrow mixing instrument according to claim 16 wherein said mixing housing chamber is cylindrical and have different chambers, helix mixing member mixes bone marrow and a scaffolding material and discharge same at a ratio of about 1 to about 3. 23. A bone marrow mixing instrument according to claim 16 wherein bone marrow and a scaffolding material are contained in said syringe tubes and the same are applied to a bone defect material at a ratio of about 1 to about 3. 24. A bone marrow mixing instrument comprising: a handle housing and a trigger member moveably mounted to said handle housing, said trigger member being biased outward from said handle housing by spring means mounted in said handle housing and engaging said trigger member, a rachet drive mounted in said handle housing, said rachet drive including a toothed rachet member moveably mounted in said handle housing with a pawl member mounted on said trigger member engaging said ratchet bar causing said ratchet bar to be sequentially driven when said trigger member is pulled toward said handle housing rearward through said handle housing, a distal end of said ratchet bar being secured to a mixing housing, said mixing housing defining a ratchet bar receiving chamber, a plurality of chambers for receiving syringe barrels of different diameters and conduit pathways communicating with said syringe barrel chambers and leading a discharge conduit located at a distal end of said mixing housing, a cartridge material dispenser mounted in each of said syringe chambers, said cartridge material dispenser comprising a syringe barrel, a piston head mounted in said syringe barrel and a piston rod mounted to said piston head, said ratchet bar when sequentially driven by the action of said trigger member and associated pawl member rearward toward said handle housing transporting said mixing housing causing each piston head mounted in said syringe barrel to move in said syringe barrel toward a tip of said syringe barrel to dispense material held in each of said syringe barrels through said mixing housing channels into and through a nozzle mounted to said mixing housing. 25. A bone marrow mixing instrument according to claim 24 wherein said handle housing comprises a drive section and an integral hand grip section extending from said drive section. 26. A bone marrow mixing instrument according to claim 24 wherein said piston rod is segmented with a plurality of spaced circular segments which extend outward from a central rod member. 27. A bone marrow mixing instrument according to claim 24 wherein said nozzle has a helix mixing member mounted therein. 28. A bone marrow mixing instrument according to claim 24 wherein said trigger member is of a shorter length than a hand grip of said handle housing and fits within a protrusion extending outward from said handle grip. 29. A bone marrow mixing instrument according to claim 24 wherein a locking member is moveably mounted to said handle housing for engagement with said piston rods, said locking member comprising a flat base plate with a plurality of L shaped cutouts formed in said base plate to receive and hold said piston rod, an activator shaft integrally formed with said base plate extending outward from said base plate on the opposite side of said base plate from said L shaped cutouts, said activator shaft extending outside of said handle housing. 30. A bone marrow mixing instrument according to claim 29 wherein said activator shaft knob has a member mounted on a distal end. 31. A bone marrow mixing instrument according to claim 24 wherein said nozzle comprises a planar base plate with a length which is longer than its width, a tube with a throughgoing bore mounted to said base plate, said tube having a curved helix mounted therein. 32. A bone marrow mixing instrument according to claim 31 wherein said tube has a plurality of flutes running along its length. 33. A bone marrow mixing instrument according to claim 24 wherein said handle housing has a connector member positioned on its distal end to hold said nozzle. 34. A bone marrow mixing instrument according to claim 33 wherein connector member defines a circular boss located around an exit aperture and a plurality of opposing bent back flanges which form a space between the bottom of the flange and the top surface of the connector member to hold said nozzle. 35. A bone marrow mixing instrument according to claim 24 wherein said handle housing defines a post located above said pawl member a coil spring mounted around said post which engages said pawl member to bias said pawl member downward. 36. A bone marrow mixing instrument according to claim 24 wherein each piston head defines an internal stepped chamber with a blind central bore. 37. A bone marrow mixing instrument according to claim 24 wherein said each piston head has a body shaped as a cone with a tip extending from said cone shaped body. 38. A bone defect material mixing instrument comprising: a handle housing, a trigger member pivotally mounted to said handle housing, said trigger member being biased outward from said handle housing by spring means mounted in said handle housing and engaging said trigger member, a ratchet bar moveably mounted in said handle housing, a ratchet drive having a pawl member mounted on said trigger member engaging said ratchet bar causing said ratchet bar to be sequentially driven by the action of said trigger member rearward through said handle housing when said trigger member is pulled against said handle housing, a distal end of said ratchet bar being secured to a mixing housing, said mixing housing defining a ratchet bar receiving chamber, a plurality of chambers for receiving syringe tubes of different diameters and conduit pathways communicating with said syringe tube chambers and leading to a distal end of said mixing housing, a cartridge material dispenser mounted in said syringe chamber, said cartridge material dispenser comprising a syringe barrel, sterile flowable material for application to a bone defect area contained within said barrel, a piston head mounted in said syringe barrel and a piston rod mounted to said piston head, said pawl member engaging said ratchet bar and causing said ratchet bar to be sequentially driven by the action of said trigger member rearward toward said handle housing carrying said mixing housing and causing each said piston head mounted in said syringe barrel to move in said syringe barrel toward a tip of said syringe barrel to dispense material held in said syringe barrel along said channels into and through a nozzle mounted to said mixing housing, said nozzle defining a central throughgoing bore with a helix mixing member mounted therein.