Apparatus For Expanding Pistons

Author:  Koether, E. A.
Source:  US Patent 2,041,355
Doc ID:  1936000
Year of Publication:  1936
Abstract:  
The invention is primarily applicable to the expansion of skirts of pistons of the split skirt type which have collapsed in use, the apparatus being such that by its employment the skirt may be evenly and quickly brought to size in order to insure proper fit with the wall of its companion cylinder. In fact, the apparatus is such that the amount of expansion of the piston may be controlled with the highest degree of accuracy and can, moreover, be utilized to expand the piston at the lower end more than at the upper end, and vice versa, when necessary. It is, likewise, possible to expand the piston into an oval shape.