Patents by Inventor Peter J. Bos

Peter J. Bos 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: 4884414
    Abstract: A defrost system adapted for use with refrigeration or heat pump systems wherein an evaporator coil defrost cycle is adaptively modified in response to changing environmental conditions. Under normal conditions, a defrost operation is effected at the end of a period of frost accumulation. The period of frost accumulation is adjusted in accordance with deviation from a desired defrost time of the time required to raise the temperature of the coil from a first predetermined temperature to a second predetermined temperature. If a predetermined maximum defrost period is exceeded, the frost accumulation period is set to a predetermined value. During the frost accumulation period, the differential between the temperature of the coil and ambient temperature is determined, and the frost accumulation period terminated and a defrost operation initiated if temperature differential exceeds a target differential.
    Type: Grant
    Filed: August 26, 1987
    Date of Patent: December 5, 1989
    Assignee: Paragon Electric Company, Inc.
    Inventor: Peter J. Bos
  • Patent number: 4850204
    Abstract: A defrost system adapted for use with refrigeration or heat pump systems wherein an evaporator coil defrost cycle is adaptively modified in response to changing environmental conditions. Under normal conditions, a defrost operation is effected at the end of a period of frost accumulation. The period of frost accumulation is adjusted in accordance with deviation of the time required to defrost a coil from a desired defrost time. During the frost accumulation period, the differential between the temperature of the coil and ambient temperature is determined, and the frost accumulation period terminated and a defrost operation initiated if temperature differential exceeds a target differential.
    Type: Grant
    Filed: August 26, 1987
    Date of Patent: July 25, 1989
    Assignee: Paragon Electric Company, Inc.
    Inventors: Peter J. Bos, John J. Allard
  • Patent number: 4411139
    Abstract: A defrost control system is provided for initiating one or more (defrost) timing cycles each at a preselected different time and for terminating the cycles at the end of their respective predetermined (defrost) periods. The unit generally includes a solid-state, microprocessor based, programmable twenty-four hour timer, and a display panel having an electrooptical digital time display and two sets of defrost status/program indicators. The two sets of defrost indicators are separately or concurrently activated to visually present a display indicative of a plurality of program and operating status events, for example, the occurrence of an automatic or manual defrost initiation.
    Type: Grant
    Filed: April 9, 1981
    Date of Patent: October 25, 1983
    Assignee: AMF Incorporated
    Inventor: Peter J. Bos