Patents by Inventor David Michael Holland

David Michael Holland 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).

  • Positive seal coupling system
    Patent number: 9310007
    Abstract: A hollow coupling for joining together two pipe ends and having a center, two coupling ends, and an inner profile. The inner profile can include a serrated section having a plurality of threads extending radially around the inner diameter of the coupling, a curved section proximate the serrated section and defining a recess for the deposition of debris and other material during installation of a pipe into the coupling, a smooth section adjacent an end of the coupling and having a diameter slightly less than the outside diameter of a pipe to be inserted into the coupling, and a transition section between the curved section and the smooth section, the transition section having a smooth, rounded profile that minimizes stress concentrations.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: April 12, 2016
    Assignee: Marubeni-Itochu Tubulars America Inc.
    Inventor: David Michael Holland
  • POSITIVE SEAL COUPLING SYSTEM
    Publication number: 20150054275
    Abstract: A hollow coupling for joining together two pipe ends and having a center, two coupling ends, and an inner profile. The inner profile can include a serrated section having a plurality of threads extending radially around the inner diameter of the coupling, a curved section proximate the serrated section and defining a recess for the deposition of debris and other material during installation of a pipe into the coupling, a smooth section adjacent an end of the coupling and having a diameter slightly less than the outside diameter of a pipe to be inserted into the coupling, and a transition section between the curved section and the smooth section, the transition section having a smooth, rounded profile that minimizes stress concentrations.
    Type: Application
    Filed: October 15, 2014
    Publication date: February 26, 2015
    Inventor: David Michael Holland
  • POSITIVE SEAL COUPLING SYSTEM
    Publication number: 20140312615
    Abstract: A hollow coupling for joining together two pipe ends and having a center, two coupling ends, and an inner profile. The inner profile can include a serrated section having a plurality of threads extending radially around the inner diameter of the coupling, a curved section proximate the serrated section and defining a recess for the deposition of debris and other material during installation of a pipe into the coupling, a smooth section adjacent an end of the coupling and having a diameter slightly less than the outside diameter of a pipe to be inserted into the coupling, and a transition section between the curved section and the smooth section, the transition section having a smooth, rounded profile that minimizes stress concentrations.
    Type: Application
    Filed: April 17, 2014
    Publication date: October 23, 2014
    Applicant: Marubeni-Itochu Tubulars America Inc.
    Inventor: David Michael Holland