Patent ID: 7677139
Filing Date: 2010-03-16
Classification: F16C

Abstract:
1. A device for rotating a crankshaft of an engine by use of a single external lever arm, said crankshaft capable of supporting a harmonic balancer: said device comprising; a first open-ended portion arranged to be removably and directly mated with said crankshaft, a second open-ended portion arranged to be removably and directly matable with said harmonic balancer, a central, radially extending portion dividing the first open-ended portion from the second open-ended portion, and a coaxial bore accessible to and removably engagable with the external lever arm for selective rotation of said crankshaft dependent upon relative positioning of a selected open-ended portion with respect to said crankshaft; wherein said first open-ended portion comprises a cylindrical section having an inner surface, said inner surface further including a coaxial, longitudinally extending, keyway groove which is engagable with a coupling spline formed on the exposed surface of said crankshaft; and, wherein said second open-ended portion comprises a cylindrical section having an outer surface, said outer surface further including a coaxial, longitudinally extending, spline which is engagable with a keyway formed in the exposed surface of said harmonic balancer.