US 12,280,388 B2
Fluid sprayer with battery power
Rami A. Azer, Dayton, MN (US)
Assigned to Graco Minnesota Inc., Minneapolis, MN (US)
Filed by Graco Minnesota Inc., Minneapolis, MN (US)
Filed on Mar. 21, 2024, as Appl. No. 18/612,693.
Application 18/612,693 is a continuation of application No. 17/206,840, filed on Mar. 19, 2021, granted, now 11,964,291.
Claims priority of provisional application 63/136,606, filed on Jan. 12, 2021.
Claims priority of provisional application 63/064,395, filed on Aug. 11, 2020.
Prior Publication US 2024/0226943 A1, Jul. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B05B 12/08 (2006.01); B05B 9/04 (2006.01)
CPC B05B 12/085 (2013.01) [B05B 9/0413 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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 connected 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, the motor controller including at least one field-effect transistor, the motor controller configured to control operation of the electric motor via the at least one field-effect transistor; and
a power controller electrically connected 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 a pressure signal indicating that the system fluid pressure is less than a pressure threshold such that the field-effect transistor is powered; and
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 pressure threshold such that the field-effect transistor is depowered;
wherein the operating power of the motor controller is not operating power of the electric motor;
wherein the motor controller controls starting and stopping of the electric motor; and
wherein the motor controller controls an operational speed of the electric motor.