Patents by Inventor Wilfred Parent

Wilfred Parent 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).

  • Method of cleaning foamed articles
    Patent number: 5218791
    Abstract: Molded urethane articles (10) are deflashed by impinging or shooting particles (14) of polyvinyl chloride at the flash (18) which develops between the seams of the mold parts. The polyvinyl chloride particles (14) are random in shape and have a maximum cross-sectional measure of 0.125 inches. The polyvinyl chloride particles (14) are set in motion using a blast of air produced by a particle blaster (12). The polyvinyl chloride particles (14) have a hardness range (50-85 Shore A durometer) which is hard enough to deflash articles made of semi-rigid urethane and, yet, soft enough not to damage a polyvinyl chloride cone.
    Type: Grant
    Filed: March 13, 1992
    Date of Patent: June 15, 1993
    Assignee: Davidson Textron Inc.
    Inventors: Wilfred Parent, Laurent R. Gaudreau