公开(公告)号：US20220018451A1

公开(公告)日：2022-01-20

申请号：US17009287

申请日：2020-09-01

Applicant: KING LAI HYGIENIC MATERIALS CO., LTD

Inventor： Cheng-Chimr LIN

IPC: F16K3/18 ,  F16K3/02 ,  F16K3/316 ,  F16K3/314 ,  F16K27/04

Abstract: A gate valve with a locking function, includes: a housing having a first plate and a second plate, the first plate and the second plate having a valve opening penetrating therethrough respectively; a driving unit; a sliding seat having a plurality of sliding abutment members; a valve member having two cranks swingably arranged on the sliding seat; the two cranks configured to form a parallel equal crank mechanism jointly with the sliding seat and the valve member; and an elastic element; wherein when the sliding seat is at the highest position, the two cranks are of a slanted shape; when the sliding seat is at the lowest position, the two cranks are of a horizontal shape relatively to the housing.

公开(公告)号：US20240309964A1

公开(公告)日：2024-09-19

申请号：US18312702

申请日：2023-05-05

Applicant: KING LAI HYGIENIC MATERIALS CO., LTD

Inventor： Cheng-Chimr LIN

IPC: F16K31/122 ,  F16K3/02 ,  F16K3/18

CPC classification number: F16K31/1225 ,  F16K3/0254 ,  F16K3/188 ,  F16K3/0281

Abstract: A gate valve includes a valve base, a first piston unit disposed in the valve base and driven by a fluid to move the valve door between a first position where the valve port is opened and a second position where the valve port is covered, a second piston unit disposed in the valve base and driven by the fluid to move the valve door between the second position and a third position where the valve port is sealed, and a valve door fitted to a valve port of the valve base. At least one flow channel switch is disposed in the valve base. When the flow channel switch is turned on, the fluid is allowed to pass through, such that the second piston unit drives accurately the valve door to seal the valve port, thereby achieving purposes of enhancing accuracy in operation and ensuing airproof performance.