Patents by Inventor Vladimir Gelfand

Vladimir Gelfand 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).

  • Engine with double sided piston
    Patent number: 6854429
    Abstract: An internal combustion engine has at least one cylinder, which is separated by a single dual-piston into two sub-chambers. The single dual-piston fulfills the role of two conventional pistons in its linear back and forth motion along the combustion chamber by using both its front and back surfaces as an element of a combustion chamber within the cylinder. Lubrication of the horizontally oriented engine distributes the oil into a space within the cylinder surrounding the middle of the dual-piston. The oil pump cycles oil to the required parts of the engine to an oil sump and back to the space.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: February 15, 2005
    Inventor: Vladimir Gelfand
  • Engine with double sided piston
    Publication number: 20040099229
    Abstract: An internal combustion engine has at least one cylinder, which is separated by a single dual-piston into two sub-chambers. The single dual-piston fulfills the role of two conventional pistons in its linear back and forth motion along the combustion chamber by using both its front and back surfaces as an element of a combustion chamber within the cylinder. Lubrication of the horizontally oriented engine distributes the oil into a space within the cylinder surrounding the middle of the dual-piston. The oil pump cycles oil to the required parts of the engine to an oil sump and back to the space.
    Type: Application
    Filed: November 25, 2002
    Publication date: May 27, 2004
    Inventor: Vladimir Gelfand