Valve device having a rotating support member for converting rotational displacement into linear displacement of a valve

Patent metadata

Field	Value
Publication number	US-10352461-B2
Application number	US-201615562056-A
Country	US
Kind code	B2
Filing date	Mar 23, 2016
Priority date	Mar 30, 2015
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A valve device which improves the operability of a valve for opening and closing a flow path. The valve device includes a valve, an actuator, an actuator support member, an operating portion, and a threaded member wherein the valve is able to open and close a fluid path in a valve body having a fluid inflow passage and a fluid outflow passage. The actuator displaces the valve between an open position and a closed position. The actuator support member operatively supports the actuator so that the actuator is able to be driven. The operating portion drives the actuator. The threaded member is threadedly engaged with the actuator.

First claim

What is claimed:

1. A valve device comprising:
a valve,
an operating portion,
an actuator,
an actuator support member, and
a threaded member;
wherein the valve is able to open and close a fluid path in a valve body having a fluid inflow passage and a fluid outflow passage,
wherein the operating portion drives the actuator,
wherein the actuator contains a rotating portion which is able to rotate in response to operation of the operating portion and has a male thread formed on an outer peripheral surface thereof, a rotating support member that holds the rotating portion and converts the rotational displacement of the rotating portion into a linear back-and-forth displacement of the valve, wherein the converted linear back-and-forth displacement is transmitted to the valve to displace the valve between an open position and a closed position,
wherein the threaded member is provided with a female thread on an inner peripheral surface thereof such that the female thread is threadedly engaged with the male thread of the rotating portion, and
wherein the actuator support member has a step which is in contact with one end of the threaded member in an axial direction, and wherein a lock nut is arranged at an opposite end of the threaded member in the axial direction, thereby supporting the threaded member in such a manner that the threaded member is arranged in the actuator support member and is immovable in the axial direction of the rotating portion.

2. The valve device according to claim 1 , wherein the valve includes a diaphragm.

3. The valve device according to claim 1 , further comprising a biasing member which is disposed between the rotating portion and the valve and biases the valve in a direction from the open position of the valve to the closed position.

4. The valve device according to claim 3 , wherein the biasing member is a coil spring.

5. The valve device according to claim 4 , wherein a disc spring is interposed between the rotating support member and the valve.

6. The valve device according to claim 5 , wherein the step of the actuator support member is in contact with one end of the threaded member which is disposed closer to the valve.

7. The valve device according to claim 6 , wherein the actuator support member is provided with a female thread on an inner peripheral surface thereof, and
wherein the lock nut is provided with a male thread on an outer peripheral surface thereof such that the male thread of the lock nut is threadedly engaged with the female thread of the actuator support member.

8. The valve device according to claim 7 , wherein the rotating portion has a first cylindrical portion with a first diameter, and
wherein the lock nut, the threaded member and the actuator support member are arranged outside the first cylindrical portion.

9. The valve device according to claim 3 , wherein a disc spring is interposed between the rotating support member and the valve.

10. The valve device according to claim 1 , wherein a disc spring is interposed between the rotating support member and the valve.

11. The valve device according to claim 1 , further comprising a compressor configured to transmit the converted linear back-and-forth displacement to the valve to displace the valve between the open position and the closed position.

Assignees

• Fujikin Kk

Inventors

• Akamoto Hisatoshi
• Suzuki Yuya

Classifications

• F16K7/16 Primary

  the diaphragm being mechanically actuated, e.g. by screw-spindle or cam · CPC title

• F16K31/5288 Primary

  comprising a diaphragm cut-off apparatus · CPC title

• F16K25/005

  Particular materials for seats or closure elements · CPC title

• F16K35/02

  to be locked or disconnected by means of a pushing or pulling action · CPC title

• F16K31/508

  the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element · CPC title