US Patent 10064611 Methods and devices for vein harvesting

A vein harvesting device. The vein harvesting device includes a retractor and a drive shaft. The retractor includes an elongated portion defining a longitudinal axis, and supports a first engagement structure including a plurality of first tines. The drive shaft includes an elongated portion, and is movable along the longitudinal axis with respect to the retractor such that the elongated portion of the drive shaft contacts the first engagement structure causing the plurality of first tines to move about the longitudinal axis from a first position to a second position.