US 12,228,220 B2
Modulating butterfly valve control
David M. Angell, Fort Worth, TX (US); Keith D. Weaver, North Richland Hills, TX (US); and Richard G. Otten, Colleyville, TX (US)
Assigned to Textron Innovations Inc., Providence, RI (US)
Filed by Textron Innovations Inc., Providence, RI (US)
Filed on Sep. 14, 2023, as Appl. No. 18/368,106.
Application 18/368,106 is a continuation of application No. 17/362,475, filed on Jun. 29, 2021, granted, now 11,802,632.
Prior Publication US 2024/0110638 A1, Apr. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F16K 1/22 (2006.01); F16K 37/00 (2006.01); G05B 15/02 (2006.01)
CPC F16K 37/0041 (2013.01) [F16K 1/221 (2013.01); G05B 15/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A control system for regulating fluid flow through a butterfly valve, comprising:
a controller configured to regulate fluid flow through the butterfly valve by adjusting a position of a disc, wherein the disc is configured to rotate on its axis within a housing of the butterfly valve, wherein the controller is configured to apply a first input signal to move the disc from a rest position to a first position located a first rotational distance from the rest position, and wherein when the controller receives a command to move the disc to a second position located a second rotational distance from the rest position, if the second rotational distance is larger than the first rotational distance then the controller applies a second input signal associated with the second position, and if the second rotational distance is smaller than the first rotational distance then the controller momentarily applies an input associated with the rest position and then applies the second input signal associated with the second position.