Patents by Inventor Andrew Niemczyk

Andrew Niemczyk 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).

  • Gas shut-off and pressure relief valve for a high pressure gas vessel
    Patent number: 5832947
    Abstract: A gas valve (10) includes a shut off valve mechanism (11) with a control stem having two annular grooves (54) that receive a deformed teflon sealing member (52) to seal the control stem against leakage. The gas valve (10) also includes a pressure relief valve (17) that includes a bursting disc (74) spaced from a cup shaped shield member (80) that has venting notches about its periphery and is spaced outboard of the bursting disc.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: November 10, 1998
    Inventor: Andrew Niemczyk
  • Gas cylinder valve body
    Patent number: D470221
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: February 11, 2003
    Inventor: Andrew Niemczyk
  • Gas cylinder valve body
    Patent number: D404464
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: January 19, 1999
    Inventor: Andrew Niemczyk
  • Vertical oxygen regulator
    Patent number: D409745
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: May 11, 1999
    Inventor: Andrew Niemczyk