Patents by Inventor Allen J. Nieber

Allen J. Nieber 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).

  • Portal frame for trench box stack
    Patent number: 4114383
    Abstract: A portal frame attached to the open end of a trench box structure and assembling and rigidifying the stacked plural boxes forming the smooth wall sides of the consequent trench box whereby side sections or panels of trench boxes are stackably adjustable as to depth or trench served and the portal span provides maximum clearance for the pipe and including thrust plates in the portal frame for transmitting thrust from the boxes and into the portal frame.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: September 19, 1978
    Assignee: Efficiency Production, Inc.
    Inventor: Allen J. Nieber
  • Portal frame for trench box stack
    Patent number: 4090365
    Abstract: A portal frame attached to the open end of a trench box structure and assembling and rigidifying the stacked plural boxes forming the smooth wall sides of the consequent trench box whereby side sections or panels of trench boxes are stackably adjustable as to depth or trench served and the portal span provides maximum clearance for the pipe.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: May 23, 1978
    Assignee: Efficiency Production, Inc.
    Inventor: Allen J. Nieber