Patents by Inventor John E. Nahra

John E. Nahra 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: 5639499
    Abstract: Sterilizing apparatus and a method including a stepped transition heat exchange bank is used to raise the temperature of a an incoming fluent food product before introducing the fluent food product to a sterilizing chamber in which the fluent food product is discharged in the form of a free-falling film; sterilizing steam is injected into the sterilizing chamber, all of which is absorbed by the fluent food product; from the sterilizing chamber, the food product with absorbed steam is passed to a vacuum chamber where part of the water in the fluent food product flashes to steam again and is removed for subsequent processing through heat exchangers and recirculation back to a steam generator upstream of the sterilizing chamber. The food product from the vacuum chamber is passed to a stepped heat exchange bank before passing to storage or packaging facilities.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: June 17, 1997
    Assignee: Dasi Industries, Inc.
    Inventors: John E. Nahra, Artur G. Zimmer
  • Patent number: 5544571
    Abstract: Sterilizing apparatus and a method including a stepped transition heat exchange bank is used to raise the temperature of an incoming fluent food product before introducing the fluent food product to a sterilizing chamber in which the fluent food product is discharged in the form of a free-falling film; sterilizing steam is injected into the sterilizing chamber, all of which is absorbed by the fluent food product; from the sterilizing chamber, the food product with absorbed steam is passed to a vacuum chamber where part of the water in the fluent food product flashes to steam again and is removed for subsequent processing through heat exchangers and recirculation back to a steam generator upstream of the sterilizing chamber. The food product from the vacuum chamber is passed to a stepped heat exchange bank before passing to storage or packaging facilities.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: August 13, 1996
    Assignee: DASI Corporation
    Inventors: John E. Nahra, Artur G. Zimmer
  • Patent number: 4591463
    Abstract: A process and apparatus for heating fluids to a relatively high temperature, such as sterilization temperature, in which the fluid, such as a liquid, is heated by direct contact with steam while it is in the form of a very thin, free-falling film or a continuous falling stream so that heating of the fluid is accomplished without the fluid coming into contact with any surface and particularly metal surfaces which are hotter than the fluid product being heated and with minimum agitation and turbulence of the fluid product. This procedure enables maximum and uniform heat penetration in a minimum time interval with the film or stream being maintained as thin as possible and unbroken by introducing steam at a relatively low velocity in a large volume vessel.
    Type: Grant
    Filed: October 24, 1984
    Date of Patent: May 27, 1986
    Assignee: DASI Industries, Inc.
    Inventors: John E. Nahra, Walter Woods
  • Patent number: 4419301
    Abstract: A process for heating fluids to a relatively high temperature, such as sterilization temperature, in which the fluid, such as a liquid, is heated by direct contact with steam while it is in the form of a very thin, free-falling film or a continuous falling stream so that heating of the fluid is accomplished without the fluid coming into contact with any surface and particularly metal surfaces which are hotter than the fluid product being heated and with minimum agitation and turbulence of the fluid product. This procedure enables maximum and uniform heat penetration in a minimum time interval with the film or stream being maintained as thin as possible and unbroken by introducing steam at a relatively low velocity in a large volume vessel.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: December 6, 1983
    Assignee: Dasi Industries, Inc.
    Inventors: John E. Nahra, Walter Woods
  • Patent number: 4310476
    Abstract: An apparatus for heating fluids to a relatively high temperature, such as sterilization temperature, in which the fluid, such as a liquid, is heated by direct contact with steam while it is in the form of a very thin, free-falling film or a continuous falling stream so that heating of the fluid is accomplished without the fluid coming into contact with any surface and particularly metal surfaces which are hotter than the fluid product being heated and with minimum agitation and turbulence of the fluid product. This procedure enables maximum and uniform heat penetration in a minimum time interval with the film or stream being maintained as thin as possible and unbroken by introducing steam at a relatively low velocity in a large volume vessel.
    Type: Grant
    Filed: October 10, 1979
    Date of Patent: January 12, 1982
    Assignee: Dasi Industries, Inc.
    Inventors: John E. Nahra, Walter Woods
  • Patent number: RE32695
    Abstract: A process for heating fluids to a relatively high temperature, such as sterilization temperature, in which the fluid, such as a liquid, is heated by direct contact with steam while it is in the form of a very thin, free-falling film or a continuous falling stream so that heating of the fluid is accomplished without the fluid coming into contact with any surface and particularly metal surfaces which are hotter than the fluid product being heated and with minimum agitation and turbulence of the fluid product. This procedure enables maximum and uniform heat penetration in a minimum time interval with the film or stream being maintained as thin as possible and unbroken by introducing steam at a relatively low velocity in a large volume vessel.
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: June 14, 1988
    Assignee: DASI Industries, Inc.
    Inventors: John E. Nahra, Walter Woods