Patents by Inventor David L. Brethorst

David L. Brethorst 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: 6604452
    Abstract: A food processing system circulates a processing medium along a circulation path having first and second segments perpendicular to food product travel along a horizontal conveyor. In another aspect, desired sequencing is provided including reversal of orientation order of return and supply path segments of the circulating processing medium.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: August 12, 2003
    Assignee: Alkar-RapidPak, Inc.
    Inventors: Robert E. Hanson, Dennis F. Conohan, Brian G. Sandberg, Peter G. Senn, Dennis P. Roelke, David L. Brethorst, Glenn L. Leach, Christopher D. McLinn, Seth T. Pulsfus, Thomas J. Betley
  • Publication number: 20020166457
    Abstract: A food processing system circulates a processing medium along a circulation path having first and second segments perpendicular to food product travel along a horizontal conveyor. In another aspect, desired sequencing is provided including reversal of orientation order of return and supply path segments of the circulating processing medium.
    Type: Application
    Filed: May 8, 2001
    Publication date: November 14, 2002
    Inventors: Dennis F. Conohan, Robert E. Hanson, Brian G. Sandberg, Peter G. Senn, Dennis P. Roelke, David L. Brethorst, Glenn L. Leach, Christopher D. McLinn, Seth T. Pulsfus, Thomas J. Betley
  • Patent number: 4670280
    Abstract: A food processor (20), such as a smokehouse, cooker, dryer or the like, includes a food receiving chamber (22) having left and right ports (24 and 26) closed and opened by air flow control means provided by pivoted perforated louvers (44 and 46). For rightward horizontal air flow across flat-lying food products, the left set of louvers is closed such that air flow is restricted to passage only through the perforations or orifices (48) as an input port. The right set of louvers are open to provide lower resistance to and a higher volume of output air flow. This enables the discharge of the extra volume of water vapor due to moisture evaporating from the food in the chamber and in turn enables uniform air flow circulation and food processing without the accumulation of water vapor and consequent increased humidity in the chamber which would otherwise retard drying.
    Type: Grant
    Filed: November 4, 1985
    Date of Patent: June 2, 1987
    Assignee: DEC International
    Inventors: Min-Nan Huang, David L. Brethorst
  • Patent number: 4665812
    Abstract: A walkway for a liquid heat transfer cabinet for food products to preclude contamination of the liquid heat transfer medium so that an operator can manually load and unload the cabinet with product to be subjected to a heat transfer operation. The walkway includes a fixed channel-shaped member mounted above the floor so that the liquid level cannot enter the fixed member and a swingable channel-shaped member functioning as a cover to the fixed member and also disposable in open position to define a walkway area like the fixed member and above the liquid level. In closed position the cover member prevents liquid from entering the area of the fixed channel-shaped member.
    Type: Grant
    Filed: October 2, 1985
    Date of Patent: May 19, 1987
    Assignee: DEC International, Inc.
    Inventors: Min N. Huang, David L. Brethorst, Richard E. Ryan
  • Patent number: 4583454
    Abstract: A food processor (20), such as a smokehouse, cooker, dryer or the like, includes a food receiving chamber (22) having left and right ports (24 and 26) closed and opened by air flow control means provided by pivoted perforated louvers (44 and 46). For rightward horizontal air flow across flat-lying food products, the left set of louvers is closed such that air flow is restricted to passage only through the perforations or orifices (48) as an input port. The right set of louvers are open to provide lower resistance to and a higher volume of output air flow. This enables the discharge of th extra volume of water vapor due to moisture evaporating from the food in the chamber and in turn enables uniform air flow circulation and food processing without the accumulation of water vapor and consequent increased humidity in the chamber which would otherwise retard drying.
    Type: Grant
    Filed: July 24, 1984
    Date of Patent: April 22, 1986
    Assignee: DEC International
    Inventors: Min-Nan Huang, David L. Brethorst
  • Patent number: 4505205
    Abstract: An enclosed floor track system for use with wheeled hand trucks or the like in sanitary liquid treatment chambers. An elongate wheel channel into which the wheels of the truck are disposed includes a cover comprising either a cover plate or inflatable elastomer seals to prevent liquid from entering the contaminated wheel channel. In the cover plate embodiment the wheel channel includes an elongate side slot to accommodate the wheel axle structure. The inflatable seal is split to slidably receive a wheel axle structure.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: March 19, 1985
    Assignee: DEC International, Inc.
    Inventors: Min N. Huang, David L. Brethorst