Patents by Inventor Oliver Crist

Oliver Crist 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).

  • Variable stroke engine or compressor
    Patent number: 4240386
    Abstract: A unique drive for an engine or compressor piston, including an angularly inclined piston wrist pin, an inclined throw along a crankshaft, a piston connecting rod therebetween being additionally slidable along the axes of the wrist pin and throw at each rotation of the crankshaft, and a guide and shift device for sliding the connecting rod for long or short strokes, the device being slideable transversely through an engine cylinder.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: December 23, 1980
    Inventor: Oliver Crist