Patents by Inventor Thomas Sven Persson

Thomas Sven Persson 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).

  • High speed pickling with recycling of acid
    Patent number: 6551413
    Abstract: In high speed pickling and other fluid treatment of metal strip, the acid or other medium is carried along with the strip, and the momentum of the treatment fluid is utilized in a flow reversal path to reverse the flow and carry the fluid on a receiving surface which directs it for recycling to the upstream end of a flow reversal zone; this procedure is repeated in at least one sequential iteration.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: April 22, 2003
    Assignee: Danieli Technology, Inc.
    Inventors: Richard Kenneth Lordo, Thomas Sven Persson
  • High speed pickling with recycling of acid
    Publication number: 20010011547
    Abstract: In high speed strip pickling and other treatment such as rinsing and cleaning, the acid or other liquid treating medium tends to be carried along with the strip, which reduces the efficiency of contact of the acid with the strip. The invention addresses this problem by providing a segmented bath, each segment having a deflector over the strip to cause a flow reversal of the acid, which is then guided by an inclined separator panel to the upstream end of the segment and deposited again on the strip. The exit of the segment also includes a constriction to cause the acid to accelerate, creating turbulence, and, on the exit side of the constriction, causing a decrease in pressure, whereby acid is drawn down from above the separator panel, which in turn assists the circulation of acid through the flow reversal.
    Type: Application
    Filed: April 11, 2001
    Publication date: August 9, 2001
    Inventors: Richard Kenneth Lordo, Thomas Sven Persson
  • High speed pickling with recycling of acid
    Patent number: 6260563
    Abstract: In high speed strip pickling and other treatment such as rinsing and cleaning, the acid or other liquid treating medium tends to be carried along with the strip, which reduces the efficiency of contact of the acid with the strip. The invention addresses this problem by providing a segmented bath, each segment having a deflector over the strip to cause a flow reversal of the acid, which is then guided by an inclined separator panel to the upstream end of the segment and deposited again on the strip. The exit of the segment also includes a constriction to cause the acid to accelerate, creating turbulence, and, on the exit side of the constriction, causing a decrease in pressure, whereby acid is drawn down from above the separator panel, which in turn assists the circulation of acid through the flow reversal.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: July 17, 2001
    Assignee: Danieli Technology, Inc.
    Inventors: Richard Kenneth Lordo, Thomas Sven Persson