Patents by Inventor Donald E. Berkemeier

Donald E. Berkemeier 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: 4674167
    Abstract: The present invention relates to a method for utilizing a unique multi-chambered conduit insert for converting a single chambered conduit into a multi-chambered conduit. In particular, the conduit insert includes a plurality of cooperating longitudinally extending walls defining a plurality of parallel spaced apart coextensive chambers. The outer wall of each chamber which is adjacent the inner supporting surface of the single chambered conduit has a configuration wherein, if the outer wall contacts the inner conduit surface when the conduit insert is inserted within the conduit, such contact is line-to-line contact. This construction results in minimal contact of the insert with the interior wall of the existing conduit and enables the multi-chambered conduit insert to be fed into the existing conduit with the expenditure of minimal energy.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: June 23, 1987
    Assignee: Sterling Engineered Products Inc.
    Inventors: Charles E. Hubbard, Donald E. Berkemeier
  • Patent number: 4585034
    Abstract: A method for utilizing a unique multi-chambered conduit insert for converting a single chambered conduit into a multi-chambered conduit. In particular, the conduit insert includes a plurality of cooperating longitudinally extending walls defining a plurality of parallel spaced apart coextensive chambers. The outer wall of each chamber which is adjacent the inner supporting surface of the single chambered conduit has a configuration wherein, if the outer wall contacts the inner conduit surface when the conduit insert is inserted within the conduit, such contact is line-to-line contact. This construction results in minimal contact of the insert with the interior wall of the existing conduit and enables the multi-chambered conduit insert to be fed into the existing conduit with the expenditure of minimal energy. In the method of the present invention, two individual conduit inserts are placed in back-to-back relationship to form an insert assembly which is subsequently inserted into the single chambered conduit.
    Type: Grant
    Filed: July 24, 1985
    Date of Patent: April 29, 1986
    Assignee: Libbey-Owens-Ford Company
    Inventors: Charles E. Hubbard, Donald E. Berkemeier
  • Patent number: 4582093
    Abstract: The present invention relates to a multi-chambered conduit insert which can be utilized to convert a single chambered conduit into a multi-chambered conduit. In particular, the conduit insert includes a plurality of cooperating longitudinally extending walls having curved outer surface portions and defining a plurality of parallel spaced apart coextensive chambers. When the conduit insert is inserted within the single chambered conduit, the curved outer surface portions of at least one of the chambers in the lower half of the insert is in line-to-line contact with the adjacent inner supporting surface of the single chambered duct, thus causing only minimal contact with the interior wall of the existing conduit and enabling the multi-chambered conduit insert to be fed into the existing conduit with the expenditure of minimal energy.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: April 15, 1986
    Assignee: Libbey-Owens-Ford Company
    Inventors: Charles E. Hubbard, Donald E. Berkemeier
  • Patent number: 4480675
    Abstract: The present invention relates to a security cover for an automobile storage compartment. The security cover includes a pair of longitudinally extending track members disposed along opposite sides and between opposite ends of the compartment to be covered. An elongated roller member extends between the track members. Means associated with the ends of the roller member effect a sliding engagement with a respective one of the track members. Flexible sheet material of generally rectangular outline is provided, such sheet material having a width substantially coextensive with the width of the compartment to be covered. Means are provided for connecting the sheet material to the roller member intermediate the opposite ends of the sheet material. A spring means causes rotation of the roller member to effect a rolling of the sheet material concentrically about the roller member. Means are provided for selectively maintaining the opposite ends of the sheet material near the opposite ends of the compartment.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: November 6, 1984
    Assignee: LOF Plastics Inc.
    Inventor: Donald E. Berkemeier
  • Patent number: D285192
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: August 19, 1986
    Assignee: LOF Plastics Inc.
    Inventors: Charles E. Hubbard, Donald E. Berkemeier