Patents by Inventor Marvin A. Koerber

Marvin A. Koerber 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).

  • Smooth bore flexible hose
    Patent number: 4304266
    Abstract: A helically fabricated flexible hose having a self-supporting helical reinforcing element of non-circular cross-section with a flat side facing inwardly, thereby imparting a substantially smooth surface to the hose interior.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: December 8, 1981
    Assignee: Automation Industries, Inc.
    Inventors: Thomas A. Kutnyak, Marvin A. Koerber
  • Electric current-carrying hose assembly having end fittings enclosing an electrical switch and/or a circuit-breaking device
    Patent number: 4277640
    Abstract: A flexible vacuum cleaner hose having an electric lead integral therewith and extending from one end to the other of said hose, a control switch and an overload device carried by said hose and in circuit with said lead, and electric cords extending from the ends of said hose, also in circuit with the lead, providing an overload protected current carrying vacuum cleaner hose for energizing a vacuum cleaner power head.
    Type: Grant
    Filed: April 26, 1979
    Date of Patent: July 7, 1981
    Assignee: Automation Industries, Inc.
    Inventors: Thomas A. Kutnyak, Marvin A. Koerber, Henry K. Wills
  • Dual wire hose
    Patent number: 4224463
    Abstract: A helically fabricated flexible hose having two reinforcing wires which also serve as electrical conductors and a multiple-ply wall which is thicker over the wire convolutions than between them and is reinforced with cords within the wall plies.
    Type: Grant
    Filed: November 9, 1978
    Date of Patent: September 23, 1980
    Assignee: Automation Industries, Inc.
    Inventors: Marvin A. Koerber, Thomas A. Kutnyak
  • Reinforced flexible duct with integral molded liner
    Patent number: 4196755
    Abstract: The reinforced flexible duct consists of a single- or double-ply reinforcing fabric, a wire helix, and a continuous extruded liner. The fabric, wire helix, and extruded liner are continuously helically wound on a mandrel. The freshly extruded liner adheres to itself, to the helically wound wire, and to the reinforcing fabric to form a continuous reinforced flexible duct. Optionally, a narrower continuously extruded and wound scuff strip can be wound over the wire helix.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: April 8, 1980
    Assignee: Automation Industries, Inc.
    Inventors: Thomas A. Kutnyak, Marvin A. Koerber