Patents by Inventor Robert D. Knoop

Robert D. Knoop 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).

  • Patent number: 5509564
    Abstract: A bung plug venting device having a threaded slot configuration for use such as in relieving internal pressure in a container for liquids is disclosed. In one embodiment, a plurality of slots are spaced at equal intervals around the threaded neck portion of the bung plug, with the upper end of the slots being positioned below the upper threads of the neck portion. The number and width of the slots will depend on the capacity of the container.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: April 23, 1996
    Assignee: Custom Metalcraft, Inc.
    Inventor: Robert D. Knoop
  • Patent number: 5231732
    Abstract: An improved hinge assembly for use on containers having a door on at least one side wall is disclosed. The features of the invention include the following: removable hinge rod for complete cleaning with rod held in place by a removable end mechanical retaining member; full length support for the door; end cap and hinge can be completely welded to pass sanitary construction specifications; enables use of aluminum or stainless steel rods; permits use of stainless steel hinge rod on aluminum containers; hinge rod can turn or rotate in end support areas or caps thereby avoiding binding or bending when installing door; and a hinge assembly area is easily cleaned; invention employs a continuous horizontal hinge rod which opens the hinge area for cleaning and continuous hinge support.
    Type: Grant
    Filed: February 4, 1991
    Date of Patent: August 3, 1993
    Assignee: Custom Metalcraft Inc.
    Inventors: Robert D. Knoop, Ronald G. Lancaster, Kenneth L. Vogt