The invention relates to a cushioning unit for an oval-tracked exercise device. A connecting element has one end pivotably attached to the elongated treadle and the other end pivotably attached to the handle bar. A lateral piece parallel to the connecting element is inwardly extended from the bottom...http://www.google.com/patents/US6821232?utm_source=gb-gplus-sharePatent US6821232 - Cushioning unit for an oval-tracked exercise device
