Oscillating reciprocating piston two-stroke engine

An oscillating reciprocating piston engine comprising:

• a cylinder comprising an upper transfer port and an exhaust port;
• a piston oscillating and reciprocating within said cylinder, said piston comprising a piston top, a piston wall and a drive finger aperture, and an exhaust cutout and a transfer cutout disposed on an edge of said piston top;
• said exhaust cutout extending from an angle of 55.degree..+-.10.degree. to an angle of 145.degree..+-.10.degree. in a piston polar coordinate system comprising a piston polar coordinate system zero axis extending perpendicularly from a piston axis and passing through a center of said drive finger aperture, said angles being measured clockwise from said a piston polar coordinate system zero axis when said piston is viewed from the top;
• said transfer cutout extending from an angle of 222.degree..+-.10.degree. to an angle of 314.degree..+-.10.degree. in said piston polar coordinate system;
• and
• a drive shaft rotatably, slidably, and swivelably attached to said piston by means of a drive finger disposed within said drive finger aperture.

An oscillating reciprocating piston engine comprising:

• a cylinder comprising an intake port, an exhaust port, an upper transfer port and a lower transfer port, said upper transfer port communicating with said lower transfer port through a transfer housing;
• a piston oscillating and reciprocating within said cylinder, said piston comprising a transfer cutout, an exhaust cutout, an intake aperture and a transfer aperture, said intake aperture comprising an intake aperture lower lobe and an intake aperture upper lobe, an upper edge of said intake aperture lower lobe communicating with a lower edge of said intake aperture upper lobe, said transfer aperture comprising a transfer aperture lower lobe and a transfer aperture upper lobe, an upper edge of said transfer aperture lower lobe communicating with a lower edge of said transfer aperture upper lobe;
• and
• a drive shaft rotatable slidably, and swivelably attached to said piston.

An oscillating reciprocating piston engine comprising:

• a cylinder comprising an intake port, an exhaust port, an upper transfer port and a lower transfer port, said upper transfer port communicating with said lower transfer port through a transfer housing;
• a piston oscillating and reciprocating within said cylinder, said piston comprising a drive finger aperture, a transfer cutout, an exhaust cutout, an intake aperture and a transfer aperture;
• said intake aperture extending from an angle of 140.degree..+-.10.degree. to an angle of 162.degree..+-.10.degree. in a piston polar coordinate system comprising a piston polar coordinate system zero axis extending perpendicularly from a piston axis and passing through a center of said drive finger aperture, said angles being measured clockwise from said a piston polar coordinate system zero axis when said piston is viewed from the top;
• and
• said transfer aperture extending from an angle of 267.degree..+-.10.degree. to an angle of 322.degree..+-.10.degree. in said piston polar coordinate system.

An oscillating reciprocating piston engine comprising:

• a cylinder comprising an intake port and an exhaust port;
• a drive shaft housing rigidly attached to said cylinder;
• a drive shaft rotating within said drive shaft housing;
• a piston oscillating and reciprocating within said cylinder, said piston comprising an intake aperture, a transfer aperture, a transfer cutout, and an exhaust cutout, said intake aperture comprising an intake aperture lower lobe communicating with an intake aperture upper lobe, said transfer aperture comprising a transfer aperture lower lobe communicating with a transfer aperture upper lobe, said transfer cutout comprising a transfer cutout lower step and a transfer cutout upper step, a depth of said transfer cutout lower step being approximately twice a depth of said transfer cutout upper step, said exhaust cutout comprising an exhaust cutout lower step and an exhaust cutout upper step, a depth of said exhaust cutout lower step being approximately twice a depth of said exhaust cutout upper step;
• and
• a means of rotatably, slidably, and swivelably connecting said drive shaft to said piston.