公开(公告)号：US11073223B2

公开(公告)日：2021-07-27

申请号：US16803246

申请日：2020-02-27

Applicant: CKD CORPORATION

Inventor： Toshio Iwata

IPC: F16K31/122

Abstract: A fluid control valve includes a multi-stage piston actuator unit with first piston and second pistons coaxially and slidably arranged therein and a valve unit provided with an inlet port for inflow of a control fluid and an outlet port for outflow of the control fluid. The first and second pistons are slidable in a sliding direction perpendicular to an imaginary line connecting the center of the inlet port and the center of the outlet port. The multi-stage piston actuator unit has a smaller thickness in a direction perpendicular to the imaginary line and perpendicular to the sliding direction than the thickness of the valve unit in the direction perpendicular to the imaginary line and perpendicular to the sliding direction. The first and second pistons have either an elliptic or oval cross-section taken perpendicular to the sliding direction, the cross-section having a long axis parallel to the imaginary line.

公开(公告)号：USD917012S1

公开(公告)日：2021-04-20

申请号：US29713052

申请日：2019-11-13

Applicant: CKD CORPORATION

Designer： Toshio Iwata