US 11,930,970 B2
Dispensers and dispenser systems for precisely controlled output dosing of soap or sanitizer
John J. McNulty, Broadview Heights, OH (US); Donald R. Harris, Cuyahoga Falls, OH (US); Mark A. Bullock, Wooster, OH (US); and Chip W. Curtis, La Moille, IL (US)
Assigned to GOJO Industries, Inc., Akron, OH (US)
Filed by GOJO Industries, Inc., Akron, OH (US)
Filed on Nov. 17, 2022, as Appl. No. 18/056,280.
Application 18/056,280 is a continuation of application No. 17/336,655, filed on Jun. 2, 2021, granted, now 11,596,271.
Claims priority of provisional application 63/033,892, filed on Jun. 3, 2020.
Prior Publication US 2023/0081854 A1, Mar. 16, 2023
Int. Cl. A47K 5/12 (2006.01)
CPC A47K 5/1208 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method of dispensing soap or sanitizer comprising:
providing a dispenser having a container for holding fluid, a motor, a pump driven by the motor, a power source, an object sensor, a processor, an encoder and pulse width modulation circuitry;
detecting the presence of an object by the object sensor;
causing the pulse width modulation circuitry to output a power signal with a first duty cycle to the motor for at least a fraction of at least one rotation of the motor;
receiving a plurality of signals from the encoder;
determining a speed of the motor;
changing from the first duty cycle to one or more second duty cycles to cause the speed of the motor to approach a selected motor speed;
wherein when the pump is driven by the motor, a fluid is pumped out of the dispenser;
determining a number of revolutions of the motor as a function of receiving the plurality of signals from the encoder;
causing the pulse with modulation circuitry to stop providing power to the motor upon determining a selected number of revolutions of the pump have occurred.