Patents by Inventor John W. Von Holdt, Sr.

John W. Von Holdt, Sr. 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).

  • Plastic bucket and lid
    Patent number: 6098833
    Abstract: A plastic bucket includes at least one undercut adjacent an upper end of the bucket defined by a bucket wall which extends upwardly and inwardly along a diagonal path. An annular, vertical section may be provided at the upper end of the diagonal path. Above the vertical section, the bucket wall extends radially outwardly to create an annular, horizontal flange. In addition, an uppermost annular rim may extend upwardly from the horizontal flange and be located approximately midway between inner and outer radii of the flange.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: August 8, 2000
    Inventors: John W. von Holdt, Sr., deceased, by John W. von Holdt, Jr., executor
  • Plastic bucket and lid
    Patent number: 5913446
    Abstract: A plastic bucket includes at least one undercut adjacent an upper end of the bucket defined by a bucket wall which extends upwardly and inwardly along a diagonal path. An annular, vertical section may be provided at the upper end of the diagonal path. Above the vertical section, the bucket wall extends radially outwardly to create an annular, horizontal flange. In addition, an uppermost annular rim may extend upwardly from the horizontal flange and be located approximately midway between inner and outer radii of the flange.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: June 22, 1999
    Inventors: John W. von Holdt, Sr., John W. von Holdt, Jr.
  • Injection mold having a rotatable sprue member
    Patent number: 5380184
    Abstract: An injection mold typically defines multiple cavities. A mold gate is provided which comprises a rotary spherical member having a sprue conduit extending transversely therethrough. Highly accurate sequential molding of multiple cavities can be achieved in this manner, as well as other advantages. Also, this arrangement permits a linear, straight sprue conduit which is free of any sharp turns.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: January 10, 1995
    Inventor: John W. Von Holdt, Sr.
  • Multiple cavity injection molding
    Patent number: 5275778
    Abstract: An injection mold typically defines multiple cavities. A mold gate is provided which comprises a rotary spherical member having a sprue conduit extending transversely therethrough. Highly accurate sequential molding of multiple cavities can be achieved in this manner, as well as other advantages. Also, this arrangement permits a linear, straight sprue conduit which is free of any sharp turns.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: January 4, 1994
    Inventor: John W. Von Holdt, Sr.
  • Multiple cavity injection mold
    Patent number: 5169655
    Abstract: An injection mold typically defines multiple cavities. A mold gate is provided which comprises a rotary spherical member having a sprue conduit extending transversely therethrough. Highly accurate sequential molding of multiple cavities can be achieved in this manner, as well as other advantages. Also, this arrangement permits a linear, straight sprue conduit which is free of any sharp turns.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: December 8, 1992
    Inventor: John W. Von Holdt, Sr.