US 12,117,095 B2
Valve actuator
Joohang Kang, Seoul (KR); Youngchan Ahn, Seoul (KR); and Deokkyu Lee, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Jul. 25, 2022, as Appl. No. 17/872,710.
Claims priority of application No. 10-2021-0109673 (KR), filed on Aug. 19, 2021.
Prior Publication US 2023/0053986 A1, Feb. 23, 2023
Int. Cl. F16K 31/04 (2006.01); F16K 31/524 (2006.01)
CPC F16K 31/52425 (2013.01) [F16K 31/048 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A valve actuator comprising:
a motor;
a gear assembly comprising:
an input gear configured to be rotated by driving force of the motor,
an output gear configured to receive rotational force of the input gear, and
at least one power transmission gear configured to transmit the rotational force from the input gear to the output gear;
a valve output shaft configured to be rotated by the gear assembly to thereby open and close a valve; and
a selective power transmitter configured to selectively transmit the rotational force from the output gear to the valve output shaft,
wherein the at least one power transmission gear comprises a plurality of gears comprising:
a first gear coupled to the input gear,
a second gear coupled to the first gear, and
a third gear coupled to each of the second gear and the output gear.