Patents by Inventor Robert L. Shallenberg

Robert L. Shallenberg 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: 4981226
    Abstract: The present invention is generally directed to a merchandise display assembly for use in retail stores and, more particularly, to a display unit which is easy to assemble, attractive in appearance and low in cost to manufacture and use. The present invention provides a display unit containing a base structure, canopy structure and slotted tubing for vertical placement between said base and canopy structures, with the base and canopy structures being made of wood, or other materials, and containing metal sockets for receipt of the respective ends of the vertical tubes. The metal sockets are installed in both the base and canopy structures in precise spatial relationships to provide for vertical alignment of the base and canopy structures when the tubes are inserted into the corresponding metal sockets on the base and canopy structures. Usually four tubes of equal dimensions are used, requiring four metal sockets in the base structure and four metal sockets on the canopy structure.
    Type: Grant
    Filed: April 26, 1990
    Date of Patent: January 1, 1991
    Inventors: Robert L. Shallenberg, Robert H. Shallenberg
  • Patent number: 4429432
    Abstract: An improved apparatus for spraying a fluid or fluid and gas mixture behind and substantially in the path of a mobile floor cleaner. An attachment housing is attached to the mobile floor cleaner, and at least one spray nozzle is positioned in the housing to generate a fluid or fluid and gas spray. Fluid is supplied to the spray nozzle by a fluid reservoir that is attached to the housing and connected to the spray nozzle by means of a fluid line.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: February 7, 1984
    Assignee: ServiceMaster Industries, Inc.
    Inventors: William M. Copeland, Roland A. Blomgren, Robert L. Shallenberg
  • Patent number: 4270238
    Abstract: The improved cleaning tool disclosed herein is particularly designed for cleaning walls and ceilings. The tool includes a novel block assembly that is mounted on an end of a wand adapted to be held and manipulated by the person doing the cleaning and that includes one surface adapted to be disposed adjacent to the wall or ceiling to be cleaned during the cleaning operation. Two continous rows of channel bristles are mounted on the one surface of the block assembly and extend across the one surface, in a direction transverse to the normal, back and forth path of motion of the block assembly while in usage. The block assembly includes a plurality of nozzles that are designed to wet the rows of channel bristles with cleaning fluid so that the cleaning fluid will flow to the distal ends of the bristles and then be applied, as a thin film, to the wall or ceiling to be cleaned. Vacuum suction slots are disposed between the rows of channel bristles.
    Type: Grant
    Filed: July 18, 1979
    Date of Patent: June 2, 1981
    Assignee: Service Master Industries, Inc.
    Inventors: Robert L. Shallenberg, Roland A. Blomgren
  • Patent number: 4174977
    Abstract: Apparatus and a method for rinsing and sanitizing a mop utilized to clean floors. Utilized with a conventional mop, mop wringer and mop bucket, the apparatus dispenses a pre-selected volume of cleaning solution onto the mop. The mop is then wrung dry and used, and the method of rinsing and sanitizing is repeated.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: November 20, 1979
    Assignee: ServiceMaster Industries, Inc.
    Inventors: Robert L. Shallenberg, Austen B. Hufton, Roland A. Blomgren, William M. Copeland