Patents by Inventor Sheldon E. Eft

Sheldon E. Eft 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).

  • Water injection system for I.C. engines
    Patent number: 4018192
    Abstract: A water injection system for internal combustion engines comprises adapter means located at the spark plug openings and including water injection nozzles and ignition generating electrodes projecting into the combustion chambers. Pressure of the ignited fuel mixture in the combustion chambers drives a water injection piston of an inexpensive water injector attached to the adapter means.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: April 19, 1977
    Inventor: Sheldon E. Eft
  • Power drill support and guide apparatus
    Patent number: 4010943
    Abstract: An apparatus for supporting a power driven drill for drilling holes in a workpiece, such as a beam and the like, is disclosed which includes a support frame having clamping members for fixedly securing the frame to the workpiece, and having drill support and guide means operative to stabilize and guide the drill as it is fed into the workpiece by means of a manual power screw.
    Type: Grant
    Filed: July 3, 1975
    Date of Patent: March 8, 1977
    Inventor: Sheldon E. Eft