Patents by Inventor Donald E. Smrekar

Donald E. Smrekar 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).

  • Hydraulically operated attachment for machine tools
    Patent number: 4012992
    Abstract: A hydraulically operated attachment for machine tools in which there is a gear drive between a rotary cutting tool and a rotary hydraulic motor. The rotation axes of the hydraulic motor, gears and cutting tool are parallel to each other for providing a compact arrangement that permits operation of the cutting tool on the work piece close to the collet that supports and rotates the latter.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: March 22, 1977
    Assignee: Parker-Hannifin Corporation
    Inventors: Donald E. Smrekar, Peter Bilan, James Hamilton