Patents by Inventor Bert Pistor

Bert Pistor 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).

  • Visual position indicator for valves with linear moving valve stem
    Patent number: 6920896
    Abstract: The present invention relates to a visual valve indicator comprised of a handle assembly with peripheral sidewalls attached to a linear moving valve stem for opening and closing of the valve and a grommet stratified into one or more color bands attached to and surrounding the base of the valve stem. A breakaway portion of the grommet allows the handle assembly to close if the grommet is frozen, by breaking away from the grommet. A sawtooth-edged inner radius of the grommet allows the grommet to slide one direction when pushed down by the handle assembly, if the valve is worn.
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: July 26, 2005
    Assignee: Torrent Trading Ltd.
    Inventors: Leon Kerger, Bert Pistor
  • Visual position indicator for valves with linear moving valve stem
    Publication number: 20040113114
    Abstract: The present invention relates to a visual valve indicator comprised of a handle assembly with peripheral sidewalls attached to a linear moving valve stem for opening and closing of the valve and a grommet stratified into one or more color bands attached to and surrounding the base of the valve stem. A breakaway portion of the grommet allows the handle assembly to close if the grommet is frozen, by breaking away from the grommet. A sawtooth-edged inner radius of the grommet allows the grommet to slide one direction when pushed down by the handle assembly, if the valve is worn.
    Type: Application
    Filed: September 4, 2003
    Publication date: June 17, 2004
    Inventors: Leon Kerger, Bert Pistor
  • Visual position indicator for valves with linear moving valve stem
    Patent number: 6655316
    Abstract: The present invention relates to a visual valve indicator comprised of a handle assembly with peripheral sidewalls attached to a linear moving valve stem for opening and closing of the valve and a grommet stratified into one or more color bands attached to and surrounding the base of the valve stem.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: December 2, 2003
    Inventors: Leon Kerger, Bert Pistor
  • Visual position indicator for valves with linear moving valve stem
    Publication number: 20030079670
    Abstract: The present invention relates to a visual valve indicator comprised of a handle assembly with peripheral sidewalls attached to a linear moving valve stem for opening and closing of the valve and a grommet stratified into one or more color bands attached to and surrounding the base of the valve stem.
    Type: Application
    Filed: October 31, 2001
    Publication date: May 1, 2003
    Inventors: Leon Kerger, Bert Pistor