US 11,680,682 B2
Overload control device for rotating machinery
Keith Papulski, Morrison, CO (US); and Thomas P. Karnowka, Bailey, CO (US)
Assigned to Taylor Tools, Denver, CO (US)
Filed by Taylor Tools, Denver, CO (US)
Filed on Nov. 3, 2021, as Appl. No. 17/518,448.
Application 17/518,448 is a continuation of application No. 16/192,438, filed on Nov. 15, 2018, granted, now 11,187,377.
Prior Publication US 2022/0057045 A1, Feb. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02P 3/00 (2006.01); F16P 3/00 (2006.01); B08B 1/00 (2006.01)
CPC F16P 3/00 (2013.01) [B08B 1/005 (2013.01); H02P 3/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A floor machine, comprising:
an electric motor;
a handle extending away from the electric motor;
one or more operating triggers carried by the handle; and
an overload control device, including:
a power input connectable to a power source;
a power output connected to the electric motor;
a load detector operative to sense when the one or more operating triggers are engaged;
a current sensor operative to sense a current value supplied to the motor via the power output;
a cutoff relay interconnecting the power input and the power output, the cutoff relay operative to supply power from the power input to the power output when activated, and interrupt power supplied from the power input to the power output when deactivated; and
a controller including instructions to:
receive a load present indication from the load detector;
activate the cutoff relay if a load is present in order to supply power to the electric motor;
receive a current value from the current sensor;
determine if the current value is greater than a selected threshold value;
deactivate the cutoff relay when the current value is greater than the selected threshold value in order to interrupt the power supplied to the electric motor; and
wait a predetermined restart delay period, during which the electric motor is prevented from restarting.