Patents by Inventor Philip Edward Tonkin

Philip Edward Tonkin 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).

  • Pressure relief device
    Patent number: 7147228
    Abstract: A circular seal (19) for the end face of a substantially cylindrical canister, the seal (19) having a substantially rectangular cross-section, and a recess (21) in one side thereof to reduce the area of said cross-section. In use the recessed area (21) of the seal (19) constitutes a weakened portion which will blow out elastically to relieve excess pressure.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: December 12, 2006
    Assignee: Wabco Automotive UK Limited
    Inventor: Philip Edward Tonkin
  • Pressure relief device
    Publication number: 20040080123
    Abstract: A circular seal (19) for the end face of a substantially cylindrical canister, the seal (19) having a substantially rectangular cross-section, and a recess (21) in one side thereof to reduce the area of said cross-section. In use the recessed area (21) of the seal (19) constitutes a weakened portion which will blow out elastically to relieve excess pressure.
    Type: Application
    Filed: November 6, 2003
    Publication date: April 29, 2004
    Inventor: Philip Edward Tonkin