Parker Hannifin Corp. President and CEO Duane E. Collins will take on the title of chairman of the Cleveland-based manufacturer, replacing Patrick S. Parker, son of the company founder. Collins, 63, is a 38-year veteran of the company who has served as CEO since July 1, 1993. Under his leadership, Parker employees have more than doubled sales and quadrupled earnings. Parker, son of company founder Arthur L. Parker, has been chairman since 1997. The board of directors voted to honor him as chairman emeritus. Collins began his career with Parker in 1961 as a sales engineer, progressing through the ranks of the hose and fluid connectors divisions to the post of group president in 1980. He then led the company's global expansion as president of the international segment through the latter part of the decade.