Piston and connecting rod assembly

Internal combustion engine apparatus comprising:

• a piston means having one end defining a crown surface and another end defining an annular piston engagement surface;
• connecting rod means having an elongated middle portion, one end adapted for connection to a crank shaft and an opposite end defining an annular rod engagement surface slidably engaged with said piston engagement surface along an annular junction;
• said rod engagement surface and said piston engagement surface being shaped and arranged to provide for said connecting rod means a center of oscillation substantially displaced from said engaged surfaces in a direction toward said crown surface;
• a chamber formed between said piston means and said opposite end of said rod means;
• said chamber disposed within said annular junction, intersecting said annular junction, and extending transversely to the axis of said elongated middle portion of said rod means so as to substantially reduce the width of said annular junction;
• passage means providing an oil flow path to said chamber;
• and
• retainer means coupled between said piston means and said connecting rod means and adapted to maintain said piston engagement surface engaged with said rod engagement surface.