Patents by Inventor Daniel A. Boardman

Daniel A. Boardman 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).

  • Automatic high negative pressure relief valve and chest drainage units using same
    Patent number: 7524311
    Abstract: Featured is an automatic high-negative pressure relief valve and its use in combination with an apparatus for draining fluid from a body. In broad terms the negative pressure relief valve includes a biasing mechanism, a moveable member acted upon by the biasing mechanism and a seating surface. When the pressure within a chamber, in which a portion of the relief valve is in fluid communication with, is less than a predetermined negative pressure, the moveable member is moved by the biasing mechanism to sealing engage the seating surface and when the pressure is at or above the predetermined value, the restoring force of the biasing mechanism is overcome and the moveable member moves away from the seating surface. In an exemplary embodiment, the biasing mechanism is a spring, diaphragm or wave washer.
    Type: Grant
    Filed: May 25, 2004
    Date of Patent: April 28, 2009
    Inventors: Trinh D. Phung, Daniel A. Boardman
  • Automatic high negative pressure relief valve and chest drainage units using same
    Publication number: 20040215170
    Abstract: Featured is an automatic high-negative pressure relief valve and its use in combination with an apparatus for draining fluid from a body. In broad terms the negative pressure relief valve includes a biasing mechanism, a moveable member acted upon by the biasing mechanism and a seating surface. When the pressure within a chamber, in which a portion of the relief valve is in fluid communication with, is less than a predetermined negative pressure, the moveable member is moved by the biasing mechanism to sealing engage the seating surface and when the pressure is at or above the predetermined value, the restoring force of the biasing mechanism is overcome and the moveable member moves away from the seating surface. In an exemplary embodiment, the biasing mechanism is a spring, diaphragm or wave washer.
    Type: Application
    Filed: May 25, 2004
    Publication date: October 28, 2004
    Inventors: Trinh D. Phung, Daniel A. Boardman
  • Automatic high negative pressure relief valve and chest drainage units using same
    Patent number: 6770062
    Abstract: Featured is an automatic high-negative pressure relief valve and its use in combination with an apparatus for draining fluid from a body. In broad terms the negative pressure relief valve includes a biasing mechanism, a moveable member acted upon by the biasing mechanism and a seating surface. When the pressure within a chamber, in which a portion of the relief valve is in fluid communication with, is less than a predetermined negative pressure, the moveable member is moved by the biasing mechanism to sealing engage the seating surface and when the pressure is at or above the predetermined value, the restoring force of the biasing mechanism is overcome and the moveable member moves away from the seating surface. In an exemplary embodiment, the biasing mechanism is a spring, diaphragm or wave washer.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: August 3, 2004
    Inventors: Trinh D. Phung, Daniel A. Boardman
  • Automatic high negative pressure relief valve and chest drainage units using same
    Publication number: 20040030322
    Abstract: Featured is an automatic high-negative pressure relief valve and its use in combination with an apparatus for draining fluid from a body. In broad terms the negative pressure relief valve includes a biasing mechanism, a moveable member acted upon by the biasing mechanism and a seating surface. When the pressure within a chamber, in which a portion of the relief valve is in fluid communication with, is less than a predetermined negative pressure, the moveable member is moved by the biasing mechanism to sealing engage the seating surface and when the pressure is at or above the predetermined value, the restoring force of the biasing mechanism is overcome and the moveable member moves away from the seating surface. In an exemplary embodiment, the biasing mechanism is a spring, diaphragm or wave washer.
    Type: Application
    Filed: August 7, 2002
    Publication date: February 12, 2004
    Applicant: Genzyme Corporation
    Inventors: Trinh D. Phung, Daniel A. Boardman