Patents by Inventor Carl Oluf Pedersen

Carl Oluf Pedersen 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).

  • Automatic hydraulic shut-off system
    Patent number: 4063489
    Abstract: A hydraulic safety system for use with a hydraulic valve and a work apparatus which is retained under hydraulic pressure even when the hydraulic line is broken inadvertently. A lock valve is connected in the line and senses the loss of hydraulic pressure, and the valve is actuated in response to the pressure drop and retains the work apparatus in a pressurized condition to thereby avoid undesired movement in response to the loss of pressure.
    Type: Grant
    Filed: March 31, 1976
    Date of Patent: December 20, 1977
    Assignee: J. I. Case Company
    Inventors: Donald James Parquet, Carl Oluf Pedersen
  • Material handling bucket dual cylinder system
    Patent number: 4037743
    Abstract: A material handling bucket dual cylinder system having two fluid valves and two fluid cylinder assemblies comprising a fluid system which controls the loading and dumping of a bucket. The system is arranged so that all of the fluid power can be directed for forceful action, such as loading the bucket, and the fluid power can also be utilized for a fast bucket action, such as dumping the bucket.
    Type: Grant
    Filed: January 14, 1976
    Date of Patent: July 26, 1977
    Assignee: J. I. Case Company
    Inventor: Carl Oluf Pedersen
  • Dual oil filter automatic switching system
    Patent number: 4033870
    Abstract: A dual oil filter automatic switching system incorporating two oil filters and a switching oil valve and an oil pump, all connected together. The system also includes electric means incorporating a differential pressure switch and a latching relay, and an electric signal and an electrically-operative temperature switch are also disclosed. The oil valve is electrically responsive to the electric switching, and the valve directs the oil to either or both of the filters.
    Type: Grant
    Filed: July 1, 1976
    Date of Patent: July 5, 1977
    Assignee: J. I. Case Company
    Inventors: Donald James Parquet, Carl Oluf Pedersen