Patent ID: 8353638

Claim:
In combination: a rotary load having a face, a small-diameter cylindrical collar projecting from the face and centered on a motor axis, a rotatable shaft centered on the axis, and at least two fastener formations on the face radially equispaced from the axis; a flywheel rotatable about the axis and juxtaposed with the face; a coupling between the flywheel and the shaft rotationally joining same together; a nonrotatable flywheel housing surrounding the flywheel and having a large-diameter circular rim centered on a flywheel axis; a generally circular centering plate having a central circular aperture dimensioned to fit snugly around the collar and a circular outer periphery, the centering plate being formed with first and second arrays of holes equispaced from a center of the aperture, the first-array holes being spaced identically to and alignable with the formations, the second-array holes being spaced from the axis differently from the first-array holes; an adapter plate engaged flatly with the centering plate and formed with a first array of at least two holes spaced identically to and alignable with the formations and with a second array of at least two holes spaced from the axis the same as the second-array holes of the centering plate; means for stiffening the adapter plate; and respective fasteners engageable, when the holes of the first arrays of both plates are aligned with the formations of the load, through the adapter plate, centering plate, and fastener formations, the second-array holes of the circular centering plate being covered by the adapter plate when the plates are thus fastened together.