Patents by Inventor Roberto Sommariva

Roberto Sommariva has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5628295
    Abstract: This disclosure relates to a two-stroke engine comprising an engine frame forming a cylinder, and a piston mounted for reciprocating movement in the cylinder. The engine frame further includes a crankcase chamber and inlet flow passages for fresh mixture, which form a crankcase compression arrangement. The cylinder includes a cylinder wall having an intake port and an exhaust port. The piston is movable in compression and combustion strokes between a top-dead-center (TDC) position and a bottom-dead-center (BDC) position in the cylinder, and the piston includes a piston skirt. Movement of the piston toward the BDC position opens the intake port and the exhaust port, and fresh mixture flows from the crankcase chamber into the cylinder and scavenges the burned gases through the exhaust port. When the piston moves toward the TDC position, the inlet flow passage is opened which allows fresh mixture to flow into the crankcase chamber.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: May 13, 1997
    Assignee: McCulloch Italiana Srl
    Inventors: Giuseppe Todero, Roberto Sommariva