Patents by Inventor John A. Darroch

John A. Darroch 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).

  • Back pressure relief motor control for a non-bleeder turbine style HVLP spray gun
    Patent number: 9599117
    Abstract: A high volume low pressure (HVLP) turbine assembly includes a housing having a turbine which includes a turbine fan rotatable within a turbine casing. A microcontroller is disposed within the housing, where the microcontroller controls a speed of an electric motor powering the turbine fan. A pressure sensor and an airflow sensing means is in airflow communication with a turbine air outlet. The HVLP turbine assembly does not have a bleeder port in airflow communication with the turbine air outlet. Rather, the microcontroller is configured to reduce the speed of the electric motor to an idle speed after a predetermined time has elapsed, wherein the predetermined time is started when the airflow sensing means indicates a period of inactivity.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: March 21, 2017
    Inventor: John A. Darroch
  • BACK PRESSURE RELIEF MOTOR CONTROL FOR A NON-BLEEDER TURBINE STYLE HVLP SPRAY GUN
    Publication number: 20140271230
    Abstract: A high volume low pressure (HVLP) turbine assembly includes a housing having a turbine which includes a turbine fan rotatable within a turbine casing. A microcontroller is disposed within the housing, where the microcontroller controls a speed of an electric motor powering the turbine fan. A pressure sensor and an airflow sensing means is in airflow communication with a turbine air outlet. The HVLP turbine assembly does not have a bleeder port in airflow communication with the turbine air outlet. Rather, the microcontroller is configured to reduce the speed of the electric motor to an idle speed after a predetermined time has elapsed, wherein the predetermined time is started when the airflow sensing means indicates a period of inactivity.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Inventor: John A. Darroch