Patents by Inventor Michael S. Lajoie

Michael S. Lajoie 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).

  • Blasting apparatus and method
    Patent number: 5230185
    Abstract: A conventional blasting apparatus is modified to provide a separate source of line air to a blast pot through a pressure regulator to provide a greater pressure in the blast pot than is provided to the conveying hose. This differential pressure is maintained by an orifice having a predetermined area situated between the blast pot and the conveying hose. This orifice provides an exit for the blast medium and a relatively small quantity of air from the blast pot to the conveying hose, and ultimately to the nozzle and finally the workpiece. The differential air pressure, typically operating between 1.0 and 15.0 psi with an orifice having an appropriate area, yields acceptable media flow rates in a controlled manner.
    Type: Grant
    Filed: November 19, 1991
    Date of Patent: July 27, 1993
    Assignee: Church & Dwight Co., Inc.
    Inventors: Lawrence Kirschner, Michael S. Lajoie, William E. Spears, Jr.
  • Process for removing coatings from sensitive substrates, and blasting media useful therein
    Patent number: 5160547
    Abstract: Blasting media for removing coatings from sensitive metal and composite surfaces, and a process useful therewith, wherein the blasting media comprise mixtures of water-soluble crystalline sodium bicarbonate particles having average particle sizes of from 100-500 microns.
    Type: Grant
    Filed: May 17, 1991
    Date of Patent: November 3, 1992
    Assignee: Church & Dwight Co., Inc.
    Inventors: Lawrence Kirschner, Michael S. Lajoie, William E. Spears, Jr.
  • Process for removing coatings from sensitive substrates, and sodium sulfate-containing blasting media useful therein
    Patent number: 5112406
    Abstract: Blasting media for removing coatings from sensitive metal and composite surfaces, and a process useful therewith, wherein the blasting media comprise mixtures of water-soluble crystalline sodium sulfate particles having average particle sizes of from 100 to 250 microns, in admixture with flow/anticaking agents.
    Type: Grant
    Filed: December 3, 1991
    Date of Patent: May 12, 1992
    Assignee: Church & Dwight Co., Inc.
    Inventors: Michael S. Lajoie, Lawrence Kirschner
  • Blasting apparatus
    Patent number: 5083402
    Abstract: Conventional industrial pressure blasting apparatus is modified to allow a controlled pressure on the blast pot that is greater than the pressure on the line where less aggressive abrasive media and air are mixed for conveying the mixture to the nozzle and then to the workpiece. A media control device, with a fixed but readily variable area, is placed between the blast pot and the media/air mixing line to meter the media flow and maintain a positive pressure differential between the blast pot and the line. Adjusting the pressure differential allows control of the weight ratio of the media-to-air flow to between about 0.05 to 0.25.
    Type: Grant
    Filed: April 4, 1991
    Date of Patent: January 28, 1992
    Assignee: Church & Dwight Co., Ind.
    Inventors: Lawrence Kirschner, Michael S. Lajoie, William E. Spears, Jr.
  • Blasting apparatus
    Patent number: 5081799
    Abstract: Conventional industrial pressure blasting apparatus is modified to allow a controlled pressure on the blast pot that is greater than the pressure on the line where the media and air are mixed for conveying the mixture to the nozzle and then to the workpiece. A media control device, with a fixed but readily variable area, is placed between the blast pot and the media/air mixing line to meter the media flow and maintain the pressure differential between the blast pot and the line. This allows control of the media flow when low flow rates, below about 10 pounds per minute, are required.
    Type: Grant
    Filed: July 12, 1991
    Date of Patent: January 21, 1992
    Assignee: Church & Dwight Co., Inc.
    Inventors: Lawrence Kirschner, Michael S. Lajoie, William E. Spears, Jr.