Patents by Inventor Joseph M. Brinkerhoff

Joseph M. Brinkerhoff 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).

  • Sprinkler system controller
    Patent number: 5464044
    Abstract: A sprinkler system controller comprising temperature sensor means for monitoring air temperature and transmitting an affirmative temperature indication signal when a given preset temperature is exceeded; light sensor means for monitoring light intensity and transmitting an affirmative illumination indication signal when a given preset intensity is not exceeded; moisture probe means for monitoring ground moisture and transmitting an affirmative moisture indication signal when a given preset moisture level is not exceeded; conjunctive means coupled to the temperature sensor means, light sensor means, and moisture probe means for transmitting an affirmative timer activation signal upon receipt of an affirmative temperature indication signal, an affirmative illumination indication signal, and an affirmative moisture indication signal; timer means coupled to the conjunctive means for receiving an affirmative timer activation signal and transmitting an affirmative sprinkler valve activation signal for a preset peri
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: November 7, 1995
    Inventor: Joseph M. Brinkerhoff