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US 7,018,382 B2Granted
Bone marrow mixing instrument
AssigneeMusculoskeletal Transplant Foundation
InventorsBarbara L. Merboth, Arthur A. Genzman
Life of this patent
Estimating the term…
Abstract
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.
Claims38
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.
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.
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.
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.
Dependencies are inferred from the claim text.