Patents by Inventor Michael J. Dewhirst

Michael J. Dewhirst 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).

  • Apparatus for forming the end portions of fibre reinforced thermoplastic composite tubes
    Patent number: 10105891
    Abstract: A method and apparatus for forming at least one external annular flange (48 or 49) adjacent one end of a fiber reinforced thermoplastic tube (10) in which the tube (10) is mounted on a mandrel (12) and a first end portion of the tube is clamped in a collar (13) having at least one internal annular cavity (18 or 19) for forming a flange, a second end portion of the tube in the region (R1, R2) of the cavity is heated to soften the thermoplastic, and an axial load (L) is applied to the end of the tube by a piston (24) causing the softened tube to flow into the cavity (18, 19) in the collar (13) to form a flange on the tube.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: October 23, 2018
    Assignee: CROMPTON TECHNOLOGY GROUP LTD.
    Inventor: Michael J. Dewhirst
  • Apparatus for forming the End Portions of Fibre Reinforced Thermoplastic Composite Tubes
    Publication number: 20140348972
    Abstract: A method and apparatus for forming at least one external annular flange (48 or 49) adjacent one end of a fibre reinforced thermoplastic tube (10) in which the tube (10) is mounted on a mandrel (12) and a first end portion of the tube is clamped in a collar (13) having at least one internal annular cavity (18 or 19) for forming a flange, a second end portion of the tube in the region (R1, R2) of the cavity is heated to soften the thermoplastic, and an axial load (L) is applied to the end of the tube by a piston (24) causing the softened tube to flow into the cavity (18, 19) in the collar (13) to form a flange on the tube.
    Type: Application
    Filed: June 30, 2014
    Publication date: November 27, 2014
    Applicant: CROMPTON TECHNOLOGY GROUP LTD.
    Inventor: Michael J. Dewhirst