Patent ID: 7854543

Claim:
A bone cement mixing and delivery system, said system comprising: a mixer including: a housing defining a mixing chamber for receiving bone cement-forming components, the housing having a discharge port from the mixing chamber; a paddle moveably disposed in the mixing chamber for mixing the components to form bone cement; a piston having a face directed towards the housing mixing chamber, said piston being moveably mounted to said housing to move through the mixing chamber so as to push the cement out through the housing discharge port; a follower moveably mounted in said housing; an electrically actuated drive assembly connected to: said paddle to move said paddle in the mixing chamber; said piston to move said piston through the mixing chamber; and to said follower to move said follower within said housing; a battery disposed in said housing that is connected to said drive assembly for supplying an energization signal to said drive assembly; a first switch disposed in said housing that is connected between said battery and said drive assembly that is positioned within said housing so as to, upon the movement of said follower, be tripped by said follower upon the movement of said follower and configured to, upon being tripped, open the connection between said battery and said drive assembly; and a delivery device removably connected to said housing, said delivery device having: a reservoir, said reservoir in fluid communication with the mixer housing discharge port for receiving the cement discharged through the housing discharge port; and a delivery port through which cement is discharged from said delivery device.