Patents by Inventor Stephen L. DeBoalt

Stephen L. DeBoalt 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).

  • Pipe joint with low insertion load, improved retention and increased high pressure sealing ability gasket and method of manufacture thereof
    Patent number: 11118710
    Abstract: Pipe joints and more particularly circular push-on type pipe joints including a flexible gasket having both hard and soft sections and where the hard section has a chamfered outer edge and a “C”-shaped grooved portion on a side opposite of the chamfered outer edge in which a portion of the soft section fills and is connected to and the soft section is configured to partially overlap a flange on an interior surface of a pipe bell end.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: September 14, 2021
    Assignee: American Cast Iron Pipe Company
    Inventor: Stephen L. Deboalt
  • Pipe joint with low insertion load, improved retention and increased high pressure sealing ability gasket and method of manufacture thereof
    Patent number: 10400924
    Abstract: Pipe joints and more particularly circular push-on type pipe joints including a flexible gasket having both hard and soft sections and where the hard section has a chamfered outer edge and a “C”-shaped grooved portion on a side opposite of the chamfered outer edge in which a portion of the soft section fills and is connected to and the soft section is configured to partially overlap a flange on an interior surface of a pipe bell end.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: September 3, 2019
    Assignee: American Cast Iron Pipe Company
    Inventor: Stephen L. DeBoalt
  • Method of manufacturing a unitary gasket using two rubber materials of different hardness
    Patent number: 10352486
    Abstract: Pipe joints and more particularly circular push-on type pipe joints including a flexible gasket having both hard and soft portions and where the soft portion overlaps a flange and an inner curved section of the hard portion.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: July 16, 2019
    Assignee: American Cast Iron Pipe Company
    Inventor: Stephen L. DeBoalt
  • PIPE JOINT WITH LOW INSERTION LOAD, IMPROVED RETENTION AND HIGH PRESSURE SEALING ABILITY GASKET AND METHOD OF MANUFACTURE THEREOF
    Publication number: 20170184230
    Abstract: Pipe joints and more particularly circular push-on type pipe joints including a flexible gasket having both hard and soft portions and where the soft portion overlaps a flange and an inner curved section of the hard portion.
    Type: Application
    Filed: December 24, 2015
    Publication date: June 29, 2017
    Inventor: Stephen L. DeBoalt
  • Pipe joint with low insertion load, improved retention and increased high pressure sealing ability gasket and method of manufacture thereof
    Publication number: 20170184229
    Abstract: Pipe joints and more particularly circular push-on type pipe joints including a flexible gasket having both hard and soft sections and where the hard section has a chamfered outer edge and a “C”-shaped grooved portion on a side opposite of the chamfered outer edge in which a portion of the soft section fills and is connected to and the soft section is configured to partially overlap a flange on an interior surface of a pipe bell end.
    Type: Application
    Filed: December 24, 2015
    Publication date: June 29, 2017
    Inventor: Stephen L. DeBoalt
  • Apparatus for assembling bell and spigot pipe joints
    Patent number: 5520419
    Abstract: A method of and rounding devices for inserting an out-of-round pipe spigot into a pipe bell by installing the rounding devices on the open end of the pipe bell. The rounding devices have cam surfaces for engaging the end of the out-of-round spigot and have sufficient strength and stiffness to deform the out-of-round into a substantially circular cross sectional configuration upon application of insertion force between the bell and spigot. The rounding devices may be removed and reused after the bell and spigot joint is assembled.
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: May 28, 1996
    Assignee: American Cast Iron Pipe Company
    Inventors: Stephen L. DeBoalt, Randall C. Conner, Howard H. O'Daniel
  • Method of assembling bell and spigot pipe joints
    Patent number: 5426842
    Abstract: A method of and rounding devices for inserting an out-of-round pipe spigot into a pipe bell by installing the rounding devices on the open end of the pipe bell. The rounding devices have cam surfaces for engaging the end of the out-of-round spigot and have sufficient strength and stiffness to deform the out-of-round into a substantially circular cross sectional configuration upon application of insertion force between the bell and spigot. The rounding devices may be removed and reused after the bell and spigot joint is assembled.
    Type: Grant
    Filed: December 29, 1993
    Date of Patent: June 27, 1995
    Assignee: American Cast Iron Pipe Company
    Inventors: Stephen L. DeBoalt, Randall C. Conner, Howard H. O'Daniel