Patent ID: 8083748
Filing Date: 2011-12-27
Classification: A61B

Abstract:
1. A device for mixing and dispensing a bone cement mixture, the device comprising: a first chamber and a second chamber each having a proximal end and a distal end, the first and second chambers being configured to contain respectively a first bone cement component and a second bone cement component; a first plunger and a second plunger disposed cooperatively within the first and second chambers, respectively, and configured to actuate within the corresponding chamber; a valve proximate the distal ends of the first and second chambers and being in fluid communication with the first and second chambers, the valve including a first position being configured to cooperate with the first plunger during actuation of the first plunger to advance the first bone cement component from the first chamber into the second chamber such that the first bone cement component mixes with the second bone cement component to form the bone cement mixture within the second chamber; and an outlet in fluid communication with the valve for dispensing the bone cement mixture from the device, wherein one of the first and second plungers is a screw-gear plunger including grooves and a handle and wherein the corresponding chamber is a high pressure injection chamber including a locking device having locked and unlocked positions, the locking device including a cam configured to engage the grooves in the locked position, the screw-gear plunger being actuated by turning the handle, cooperating the cam and the grooves to advance the screw-gear plunger towards the distal end of the high pressure chamber, the cam configured to disengage from the grooves in the unlocked position, the screw-gear plunger being actuated by pushing the screw-gear plunger towards the distal end of the high pressure injection chamber.