Patent ID: 8016218

Claim:
A specimen shaker comprising: a base having a first pivot connection and a second pivot connection; a first pivot arm pivotably connected to said base at said first pivot connection, said first pivot arm having a first end located adjacent said first pivot connection and a second end opposite said first end; a second pivot arm pivotably connected to said base at said second pivot connection, said second pivot arm having a first end located adjacent said second pivot connection and a second end opposite said first end; a first specimen holder attached to said first pivot arm at said second end of said first pivot arm and configured to shake a specimen contained therein in a direction generally perpendicular to said first pivot arm; a second specimen holder attached to said second pivot arm at said second end of said second pivot arm and configured to shake a specimen contained therein in a direction generally perpendicular to said second pivot arm; a drive affixed to said base and having a crank shaft; a first connecting arm extending between said crank shaft and said first pivot arm; and a second connecting arm extending between said crank shaft and said second pivot arm; wherein rotation of said crank shaft causes each of said first pivot arm and said second pivot arm to pivot about said first pivot connection and said second pivot connection, respectively.