US 11,231,026 B2Granted

Valve device

AssigneeFujikin Incorporated

InventorsKazunari Watanabe, Kohei Shigyou, Kenji Aikawa, Tomohiro Nakata, Takahiro Matsuda, Tsutomu Shinohara

Life of this patent

Estimating the term…

Loading patent…

Abstract

A valve device includes valve elements each having a valve seat, a valve seat support, and a diaphragm provided so as to be able to abut on and separate from the seat surface of the valve seat, the diaphragm making the flow passage of the valve seat and the corresponding secondary flow path communicate through the gap between the diaphragm and the valve seat, and the valve seat support has seal surfaces that cooperate with a part of the inner wall surface of the corresponding accommodation recess to shut off the communication between the corresponding primary flow path and the secondary flow path, and a detour passage that connects the primary flow path and the flow passage of the valve seat, and the valve body defines a communication passage that makes the secondary flow paths communicates with each other.

Claims12

Dependent claims

A valve device, comprising:

a block-shaped valve body,
the valve body defining first and second accommodation recesses in which first and second valve elements are respectively housed, primary flow paths respectively making the first and second accommodation recesses communicate with the exterior of the valve body, secondary flow paths respectively making the first and second accommodation recesses communicate with the exterior of the valve body, each secondary flow path extending to an outer periphery of a corresponding one of the first or second accommodation recess, and a communication flow path extending between an outer periphery of the first valve element and an outer periphery of the second valve element and connecting the first and second accommodation recesses to make the secondary flow paths communicate with each other, and
each of the first and second valve elements selectively switching a state of communication between the primary and secondary flow paths connected to the first or second accommodation recess.

Dependencies are inferred from the claim text.

Facts

Application: 16/757,939Filed 22 Oct 2018
Priority: JP JP2017-21039131 Oct 2017
Published: US 2020/0325887 A115 Oct 2020
Granted: 25 Jan 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

F04B 43/02
Machines, pumps, or pumping installations having flexible working members: having plate-like flexible members, e.g. diaphragms
F16K 7/12
Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves: with flat, dished,…
F16K 7/17
Arranged to be deformed against a flat seat: the diaphragm being actuated by fluid pressure
F16K 11/20
With two or more closure members not moving as a unit: operated by separate actuating members