Patents by Inventor Lewis C. Pritchard

Lewis C. Pritchard 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).

  • Muffler for portable pneumatic tool
    Patent number: 4205732
    Abstract: The invention relates to a muffler for portable pneumatic tools wherein the exhaust of the pneumatic motor is passed into an expansion chamber having a perforated outlet baffle biased to the direction of the flow in the chamber. The flow from the expansion chamber enters a muffler chamber having an outlet baffle also biased to the direction of fluid flow. Both the first and second baffle are formed in an end cap for the handle of the pneumatic tool and form a removable extension thereof.
    Type: Grant
    Filed: March 7, 1979
    Date of Patent: June 3, 1980
    Assignee: Ingersoll-Rand Company
    Inventors: Edward I. Auerbach, Lewis C. Pritchard, John M. Clapp