Patents by Inventor Gerald P. Piechowski

Gerald P. Piechowski 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).

  • Shielding gas filter for welding apparatus
    Patent number: 6809286
    Abstract: A shielding gas filter that can be readily incorporated into a gas shielding system for an arc welding apparatus. The gas shielding filter is readily installed to the system upstream of a gas solenoid valve and removes any potentially harmful particles from the supply of the shielding gas to prevent those particles from entering the gas solenoid valve. The shielding gas filter includes a housing having an inlet and an outlet and a specially formed passageway that communicates between the inlet and the outlet. A filter screen is retained within the housing to filter out the particles larger than a predetermined size. Preferably, the filter screen is constructed of stainless steel and filters out particles larger than about 100 microns.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: October 26, 2004
    Assignee: Illinois Tool Works Inc.
    Inventors: Gerald P. Piechowski, Mark R. Christopher
  • Shielding gas filter for welding apparatus
    Publication number: 20040031841
    Abstract: A shielding gas filter that can be readily incorporated into a gas shielding system for an arc welding apparatus. The gas shielding filter is readily installed to the system upstream of a gas solenoid valve and removes any potentially harmful particles from the supply of the shielding gas to prevent those particles from entering the gas solenoid valve. The shielding gas filter includes a housing having an inlet and an outlet and a specially formed passageway that communicates between the inlet and the outlet. A filter screen is retained within the housing to filter out the particles larger than a predetermined size. Preferably, the filter screen is constructed of stainless steel and filters out particles larger than about 100 microns.
    Type: Application
    Filed: August 16, 2002
    Publication date: February 19, 2004
    Inventors: Gerald P. Piechowski, Mark R. Christopher