Patents by Inventor Robert F. Christensen

Robert F. Christensen 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: 4455895
    Abstract: A beverage can opener tool for opening a container having a pull tab attached to a non-removable section of the beverage can top for opening the container for beverage consumption. The tool is a thin, rigid bar of metal that is generally flat throughout an intermediate portion and end portions which are interconnected by offset connecting portions. The tool is of unitary construction and devoid of cavities, recesses or crevices for collection of foreign matter, and the tool is easily cleaned and does not become dirty under normal use.
    Type: Grant
    Filed: August 26, 1982
    Date of Patent: June 26, 1984
    Assignees: Clyde M. McFarland, Joyce J. Janssen, Shirley I. Gibson
    Inventor: Robert F. Christensen
  • Patent number: 4194627
    Abstract: A collapsible and reusable beverage container insulator comprising a foldable sleeve of semi-rigid insulating material joinable to a disc-shaped bottom and a hinged top lid shaped to fit the sleeve opening. The sleeve has a lip cut out portion, the top lid being adapted to fit the lip cut out portion when mounted by fastening means to the sleeve.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: March 25, 1980
    Assignee: Shirley I. Gibson
    Inventor: Robert F. Christensen
  • Patent number: 4175638
    Abstract: A control mechanism for a steering system for individually or simultaneously controlling the turning movements of the front and rear wheels of a vehicle is disclosed herein. The steering system is capable of controlling the movement of the rear wheels in a plurality of modes with respect to the front wheels and one mode in which the rear wheels are independently controlled. The control mechanism includes a control member that is pivoted on the frame of the vehicle to a plurality of positions to move an actuating switch that is part of the control means to a plurality of positions corresponding to the respective modes of steering and actuating means that cooperates with a signal producing device that produces a control signal to independently control the turning movement of the rear wheels.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: November 27, 1979
    Assignee: J. I. Case Company
    Inventor: Robert F. Christensen