公开(公告)号：US12117095B2

公开(公告)日：2024-10-15

申请号：US17872710

申请日：2022-07-25

Applicant: LG ELECTRONICS INC.

Inventor： Joohang Kang ,  Youngchan Ahn ,  Deokkyu Lee

IPC: F16K31/04 ,  F16K31/524

CPC classification number: F16K31/52425 ,  F16K31/048

Abstract: A valve actuator includes a motor and a gear assembly including an input gear rotated by driving force of the motor, an output gear receiving rotational force of the input gear, and at least one power transmission gear transmitting the rotational force of the input gear to the output gear. The valve actuator further includes a valve output shaft actuated to close a path of a valve, and a selective power transmitter selectively transmitting the rotational force of the output gear to the valve output shaft. The selective power transmitter includes a cam portion provided in at least one of the output gear and the valve output shaft. Accordingly, after the valve is actuated to close the path, the driving force of the motor is not transmitted to the valve output shaft.

公开(公告)号：US12000498B2

公开(公告)日：2024-06-04

申请号：US17883818

申请日：2022-08-09

Applicant: LG ELECTRONICS INC.

Inventor： Joohang Kang ,  Youngchan Ahn ,  Deokkyu Lee

IPC: F16K31/04 ,  F16K1/14 ,  F16K31/53

CPC classification number: F16K31/045 ,  F16K1/14 ,  F16K31/535

Abstract: A valve actuator includes a motor and a gear assembly that receives driving force of the motor and controls a valve. In the gear assembly, a power transmission gear for transmitting rotational force of an input gear to an output gear includes a selective power transmission unit. When the output gear is in physical contact with a stopper, the power transmission gear transmits the rotational force of the input gear to the output gear is blocked. Accordingly, even after the valve is actuated to close a path, the rotational force of the input gear is not transmitted to the output gear even though the motor is continuously driven.