Patents by Inventor Carl L. Nazarenus

Carl L. Nazarenus 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: 4138200
    Abstract: A drill stop which includes a conically shaped nosepiece facing the drilling surface, the nosepiece having a hole coaxially disposed therein providing a slip fit with the drill diameter. The conically shaped nosepiece retains a coaxially disposed steel spring to soften the shock of drill point breakthrough in drilled material. A bushing sleeve at the end of the steel spring opposite the nosepiece retains the steel spring in position while the end of the bushing sleeve opposite the steel spring-retaining end provides a press fit for one end of a spacer tube, the other end of the spacer tube contacting the drill chuck jaws.
    Type: Grant
    Filed: February 1, 1978
    Date of Patent: February 6, 1979
    Assignee: Boeing Commercial Airplane Company
    Inventor: Carl L. Nazarenus