Patents by Inventor Randy H. Alfrey

Randy H. Alfrey 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).

  • Control system for a recreational vehicle's air-conditioning/heating unit
    Patent number: 4784214
    Abstract: A secondary control system (10) for a RV's air-conditioning/heating system. Conventional roof-mounted RV heating and cooling units have a primary control for selectively energizing the heating/cooling unit (11). This unit is normally wired through a circuit breaker which supplies power provided by a conventional power line. The present control system (10) includes a switch (20) which selectively energizes the heating/cooling unit. This switch (20) is controlled by a low voltage control device (30). The control device operates in an override mode such that the primary control associated with the heating/cooling unit (11) serves to energize and de-energize such unit. The control device (10) also includes a thermostatically controlled mode for selectively opening and closing the control switch (20) in response to ambient temperature.
    Type: Grant
    Filed: February 13, 1987
    Date of Patent: November 15, 1988
    Inventors: Joe R. Penson, Randy H. Alfrey