Patent ID: 8590419

Claim:
A flywheel for a pump, said flywheel being configured to rotate around an axis of rotation, the flywheel comprising: an inner tubular member having an outer diameter; an outer tubular member having an inner diameter; a number of segments provided in a tubular space defined between the outer diameter of the tubular inner member and the inner diameter of the tubular outer member, said outer diameter of the tubular inner member and said inner diameter of the tubular outer member respectively defining an inner segment diameter and an outer segment diameter of said segments, wherein the tubular inner member, the tubular outer member and the number of segments are operably coupled to a rotatably operable shaft of the pump for rotation therewith, wherein the tubular outer member is in an interference fit with at least one of the segments, wherein a preselected gap is provided between each of the segments and is structured to accommodate thermal expansion of the segments, wherein the gap is structured to accommodate thermal expansion of each of the number of segments, and wherein the rotatable flywheel further comprises an upper pin and a lower pin, said lower pin positioned lower than said upper pin in a direction along the axis of rotation provided at each gap between the segments at the inner segment diameter.