Patents by Inventor Gilbert M. Masters

Gilbert M. Masters 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).

  • Freeze protection apparatus for solar collectors
    Patent number: 4450868
    Abstract: A freeze protection system allows the working fluid contained in the communicating tubes of the solar collector to drain from both the input and output tubes of the collector when a first predetermined temperature of the working fluid is detected and to fill the collector via both the input and output tubes when a second predetermined temperature is detected. The invention includes valve mechanisms, of the spool valve variety, that communicate the working fluid to be heated to the collector and therefrom to a storage tank, a valve actuator and a sensor.
    Type: Grant
    Filed: April 30, 1981
    Date of Patent: May 29, 1984
    Inventors: Eugene F. Duval, David P. Bagshaw, Michael A. Kast, Gilbert M. Masters, Harry T. Whitehouse
  • Freeze protection apparatus for solar collectors
    Patent number: 4280478
    Abstract: A freeze protection system allows the working fluid contained in the communicating tubes of the solar collector to drain from both the input and output tubes of the collector when a first predetermined temperature of the working fluid is detected and to fill the collector via both the input and output tubes when a second predetermined temperature is detected. The invention includes valve mechanisms, of the spool valve variety, that communicate the working fluid to be heated to the collector and therefrom to a storage tank, a valve actuator and a sensor.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: July 28, 1981
    Inventors: Eugene F. Duval, David P. Bagshaw, Michael A. Kast, Gilbert M. Masters, Harry T. Whitehouse