Patents by Inventor MATTHEW J. DUFFY

MATTHEW J. DUFFY 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 and method for strengthening welded-lap joints for steel pipeline
    Patent number: 10975990
    Abstract: An apparatus and method for reinforcing a welded-lap pipe joint includes a first pipe segment having a bell-end presenting a receptacle, a spigot-end of a second pipe segment extending into and welded to the bell-end receptacle to form a welded-lap joint, and a bell-shaped reinforcing sleeve surrounding the welded-lap joint. In exemplary embodiments the reinforcing sleeve is welded to the first or second pipe segments. Also disclosed are a method of assembling a reinforced welded-lap pipe joint.
    Type: Grant
    Filed: April 3, 2019
    Date of Patent: April 13, 2021
    Assignee: HDR, INC.
    Inventors: John R. Plattsmier, Matthew J. Duffy
  • APPARATUS AND METHOD FOR STRENGTHENING WELDED-LAP JOINTS FOR STEEL PIPELINE
    Publication number: 20190226610
    Abstract: An apparatus and method for reinforcing a welded-lap pipe joint includes a first pipe segment having a bell-end presenting a receptacle, a spigot-end of a second pipe segment extending into and welded to the bell-end receptacle to form a welded-lap joint, and a bell-shaped reinforcing sleeve surrounding the welded-lap joint. In exemplary embodiments the reinforcing sleeve is welded to the first or second pipe segments. Also disclosed are a method of assembling a reinforced welded-lap pipe joint.
    Type: Application
    Filed: April 3, 2019
    Publication date: July 25, 2019
    Applicant: HDR, INC.
    Inventors: JOHN R. PLATTSMIER, MATTHEW J. DUFFY
  • Apparatus and method for strengthening welded-lap joints for steel pipeline
    Patent number: 10267440
    Abstract: An apparatus and method for reinforcing a welded-lap pipe joint includes a first pipe segment having a bell-end presenting a receptacle, a spigot-end of a second pipe segment extending into and welded to the bell-end receptacle to form a welded-lap joint, and a bell-shaped reinforcing sleeve surrounding the welded-lap joint. In exemplary embodiments the reinforcing sleeve is welded to the first or second pipe segments. Also disclosed are a method of assembling a reinforced welded-lap pipe joint.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: April 23, 2019
    Assignee: HDR, INC.
    Inventors: John R. Plattsmier, Matthew J. Duffy
  • APPARATUS AND METHOD FOR STRENGTHENING WELDED-LAP JOINTS FOR STEEL PIPELINE
    Publication number: 20170234463
    Abstract: An apparatus and method for reinforcing a welded-lap pipe joint includes a first pipe segment having a bell-end presenting a receptacle, a spigot-end of a second pipe segment extending into and welded to the bell-end receptacle to form a welded-lap joint, and a bell-shaped reinforcing sleeve surrounding the welded-lap joint. In exemplary embodiments the reinforcing sleeve is welded to the first or second pipe segments. Also disclosed are a method of assembling a reinforced welded-lap pipe joint.
    Type: Application
    Filed: August 26, 2016
    Publication date: August 17, 2017
    Applicant: HDR, INC.
    Inventors: JOHN R. PLATTSMIER, MATTHEW J. DUFFY