Patent ID: 7967499
Filing Date: 2011-06-28
Classification: A61F,B01F

Abstract:
1. A mixer for mixing bone cement, said mixer including: a housing including a bottom surface and a side wall that extends upwardly from and circumferentially around said bottom surface, said side wall defining an open top of said housing; a lid removably attachable to said top of said housing; a first paddle disposed in said housing, said first paddle including: a shaft that is rotatably mounted to said lid and able to move longitudinally relative to said lid; and at least one vane that extends from said first paddle shaft so to be located adjacent said bottom surface of said housing; a second paddle disposed in said housing, said second mixing paddle including: a shaft that is rotatably mounted to said lid and able to move longitudinally relative to said lid; a vane that extends from said second paddle shaft and is located above said at least one vane of said first paddle; and a head that extends around said second paddle shaft and is positioned to extend over and abut a component of said first paddle so as to limit movement of said second paddle vane towards said first paddle at least one vane; at least one biasing member that extends between said lid and said paddles for urging said paddles downwardly so that said first paddle at least one vane is urged toward said housing bottom surface and said second paddle vane is urged towards said first paddle at least one vane; and a handle connected to said paddles for simultaneously rotating said paddles.