Patent ID: 11964291
Assignee: GRACO MINNESOTA INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC B  F  H | IPC B  G

Claim 18:
19. A battery powered fluid sprayer comprising:
a reciprocating positive displacement pump;
a power supply that includes a battery;
an electric motor electrically connected to the power supply and to the pump to drive operation of the pump for spraying;
a motor controller electrically connected to the electric motor to control operation of the electric motor;
a user-adjustment mechanism for setting a user-adjustable pressure threshold corresponding to system fluid pressure of the battery powered fluid sprayer;
a pressure switch that generates a pressure signal indicative of whether the system fluid pressure is greater than the user-adjustable pressure threshold; and
a power controller, electrically connected to the pressure switch and to the motor controller, the power controller configured to control power of the battery powered fluid sprayer by:
providing operating power of the motor controller in response to the pressure signal indicating that the system fluid pressure is less than the user-adjustable pressure threshold;
not providing the operating power of the motor controller in response to the pressure signal indicating that the system fluid pressure is greater than the user-adjustable pressure threshold; and
providing operating power of the motor both when providing the operating power of the motor controller and when not providing the operating power of the motor controller.