Patents by Inventor Duane K. Emerson

Duane K. Emerson 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).

  • Fluid distributor for a debris flushing system in a percussive, fluid-activated apparatus
    Patent number: 5402854
    Abstract: A fluid distributor for a debris flushing system in a fluid-activated jackhammer includes a bore through a reciprocal piston, for fluid flow into an exhaust chamber, a fluid distributor removably mounted in the piston bore, the fluid distributor operating by forming passageways through the bore and blocking flow in other portions of the bore. The distributor can have a tapered body that can be severed along its length by the operator to provide a plurality of preselected, fixed flow rates.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: April 4, 1995
    Assignee: Ingersoll-Rand Company
    Inventors: Robert R. Kimberlin, Duane K. Emerson, Richard S. Holland