Patents by Inventor David J. Klee

David J. Klee 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).

  • Cryogenic freezer
    Patent number: 4229947
    Abstract: A cryogenic freezer of the elongated, tunnel-type is disclosed in which a centrally located blower recirculates injected cryogenic refrigerant at extremely high velocities through a pair of minimum size product contact chambers. In one preferred embodiment, the cross-sectional area of the product contact chamber is variable so as to maintain minimum sizes for products of different height.
    Type: Grant
    Filed: August 6, 1979
    Date of Patent: October 28, 1980
    Assignee: Air Products and Chemicals, Inc.
    Inventor: David J. Klee
  • Refrigeration system for shipping container
    Patent number: 4033140
    Abstract: A cryogenic refrigeration system is disclosed for being detachably mounted on a shipping container to provide in-transit refrigeration of the containerized cargo.
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: July 5, 1977
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David J. Klee, Jack H. Godtfring
  • Parallel flow cryogenic freezer
    Patent number: RE28712
    Abstract: .Iadd.A cryogenic freezer for freezing products comprising an elongated horizontal tunnel, a conveyor extending therethrough, a liquid cryogenic spray at the outlet end of the conveyor, a plurality of substantially closed gas recirculating flow paths in series relationship along the length of the tunnel and individual fans in each recirculating flow path for causing gas contact with product being conveyed through the tunnel. .Iaddend.
    Type: Grant
    Filed: August 6, 1969
    Date of Patent: February 17, 1976
    Assignee: Air Products and Chemicals, Inc.
    Inventor: David J. Klee