Patent ID: 6935221

Claim:
A piston for a reciprocating compressor, comprising: a die cast aluminum body having a head at a first end and a cylindrical contour forming an exterior boundary extending away from the head to an opposed second end, the body having a preselected outer diameter, a preselected inner geometry and a preselected thickness so as to form a cavity within the body having walls for receiving a rod, the head, the outer diameter and the inner geometry of the body forming a continuous wall, the cavity having an opening adjacent to the opposed second end of the body, the piston further characterized by an absence of apertures formed by coring extending diametrally through the walls; the walls having a preselected geometry forming an interior boundary of the body within the cavity; the piston capable of receiving at least one aperture extending diametrally across and through the outer diameter of the piston at a preselected location between the first end and the second end, the aperture having a preselected diameter corresponding to an outer diameter of a pin; and wherein the walls having a preselected geometry include a first pair of substantially parallel walls extending as chords across the cavity; and a second pair of substantially parallel walls, the second pair of walls extending as chords across the cavity substantially at about 90° to the first pair of walls, the first and second pair of walls forming a substantially rectangular geometry within the cavity of the piston.