Lock device and valve device

Patent metadata

Field	Value
Publication number	US-9803776-B2
Application number	US-201414785106-A
Country	US
Kind code	B2
Filing date	Apr 11, 2014
Priority date	Apr 17, 2013
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

Provided are a valve device free of changes in the position of the valve member caused by external force and fluid pressure, and a lock device for the valve device. The lock device has a tubular member fitted to the rotating part of the valve device so that the member is movable along the axis of the rotating part in both directions, wherein the member has a protrusion on its inner circumferential face along its axis, and the protrusion engages with or disengages from recesses in an outer circumferential face of a holder of the rotating part formed along its axis when the member moves in either direction; or the member has recesses in its inner circumferential face formed along its axis, and the recesses engage with or disengage from a protrusion on the outer circumferential face of the holder along its axis when the member moves in either direction.

First claim

We claim:

1. A lock device applicable to a valve device comprising:
a valve member having a diaphragm and placed in a valve body having an inlet port and an outlet port, the valve member being configured to obstruct the inlet and outlet ports or to allow the inlet and outlet ports to communicate with each other,
a rotating part rotating around a central axis thereof, for driving the valve member so as to place the valve member at an obstructing position or at a communicating position,
a rotating part holder for holding the rotating part in such a way that the rotating part is rotatable, and
an operating part for rotating the rotating part,
the lock device comprising:
a tubular member fitted to the rotating part in such a manner that the tubular member is movable along the central axis of the rotating part in both directions,
wherein the tubular member has a protrusion which is formed on an inner circumferential face of the tubular member and has a longitudinal axis that extends parallel with a central axis of the tubular member, and the protrusion engages or disengages from a plurality of recesses which is formed in an outer circumferential face of the rotating part holder parallel with a central axis of the rotating part holder when the tubular member moves in either direction,
wherein the plurality of recesses is a plurality of longitudinal grooves which comprises at least a first longitudinal groove, a second longitudinal groove and a third longitudinal groove,
wherein the first longitudinal groove is formed corresponding to the obstructing position,
wherein the second longitudinal groove is formed corresponding to the communicating position, and
wherein the third longitudinal groove is disposed between the obstructing position and the communicating position.

2. The lock device according to claim 1 , wherein the tubular member has an upper recess and a lower recess in the inner circumferential face thereof, the rotating part has an engaging ball capable of sticking out of and withdrawing from an outer circumferential face of the rotating part, and the engaging ball is capable of engaging the upper recess and the lower recess.

3. The lock device according to claim 1 , the valve device further comprising a valve member-fixing part with the valve member at one end, wherein the valve member-fixing part has a guide groove and the rotating part has a moving projection inserted into the guide groove; and wherein the moving projection moves in the guide groove as the rotating part is rotated, so that the valve member-fixing part moves in relation to the rotating part, thereby shifting the valve member at least between the obstructing position and the communicating position.

4. The lock device according to claim 1 , wherein the tubular member has an engaging member for engaging with a longitudinal groove running parallel with the central axis of the rotating part, the longitudinal groove formed in an outer circumferential face of the rotating part, whereby the tubular member is prevented from slipping off the rotating part.

5. The lock device according to claim 1 , wherein the operating part comprises a lever.

6. A valve device comprising:
a valve member having a diaphragm and placed in a valve body having an inlet port and an outlet port, the valve member being configured to obstruct the inlet and outlet ports or to allow the inlet and outlet ports to communicate with each other,
a rotating part rotating around a central axis thereof, for driving the valve member so as to place the valve member at an obstructing position or at a communicating position,
a rotating part holder for holding the rotating part in such a way that the rotating part is rotatable,
an operating part for rotating the rotating part, and
a tubular member fitted to the rotating part in such a manner that the tubular member is movable along the central axis of the rotating part in both directions;
wherein the tubular member has a protrusion which is formed on an inner circumferential face of the tubular member and has a longitudinal axis that extends parallel with a central axis of the tubular member, and the protrusion engages or disengages from a plurality of recesses which is formed in an outer circumferential face of the rotating part holder parallel with a central axis of the rotating part holder when the tubular member moves in either direction,
wherein the plurality of recesses is a plurality of longitudinal grooves which comprises at least a first longitudinal groove, a second longitudinal groove and a third longitudinal groove,
wherein the first longitudinal groove is formed corresponding to the obstructing position,
wherein the second longitudinal groove is formed corresponding to the communicating position, and
wherein the third longitudinal groove is disposed between the obstructing position and the communicating position.

7. The valve device according to claim 6 , wherein the tubular member has an upper recess and a lower recess in the inner circumferential face thereof, the rotating part has an engaging ball capable of sticking out of and withdrawing from an outer circumferential face of the rotating part, and the engaging ball is capable of engaging the upper recess and the lower recess.

8. The valve device according to claim 6 , further including a valve member-fixing part with the valve member at one end, wherein the valve member-fixing part has a guide groove and the rotating part has a moving projection inserted into the guide groove; and wherein the moving projection moves in the guide groove as the rotating part is rotated, so that the valve member-fixing part moves in relation to the rotating part, thereby shifting the valve member at least between the obstructing position and the communicating position.

9. The valve device according to claim 6 , wherein the tubular member has an engaging member for engaging a longitudinal groove running parallel with the central axis of the rotating part, the longitudinal groove formed in an outer circumferential face of the rotating part, whereby the tubular member is prevented from slipping off the rotating part.

10. The valve device according to claim 6 , wherein the operating part comprises a lever.

11. A lock device applicable to a valve device comprising:
a valve member having a diaphragm and placed in a valve body having an inlet port and an outlet port, the valve member being configured to obstruct the inlet and outlet ports or to allow the inlet and outlet ports to communicate with each other,
a rotating part rotating around a central axis thereof, for driving the valve member so as to place the valve member at an obstructing position or at a communicating position,
a rotating part holder for holding the rotating part in such a way that the rotating part is rotatable, and
an operating part for rotating the rotating part,
the lock device comprising:
a tubular member fitted to the rotating part in such a manner that the tubular member is movable along the central axis of the rotating part in both directions, wherein the tubular member has a protrusion which is formed on an inner circumferential face of the tubular member and has a longitudinal axis that extends parallel with a central axis of the tubular member, and the protrusion engages or disengages from a plurality of recesses which is formed in an outer circumferential face of the rotating part holder parallel with a central axis of the rotating part holder when the tubular member moves in either direction,
wherein the plurality of recesses is a plurality of longitudinal grooves, and
wherein the protrusion is a pin which is disposed radially inward between the inner circumferential face of th

Assignees

• Fujikin Kk

Inventors

• Akamoto Hisatoshi
• Shikata Izuru
• TANNO Ryutaro

Classifications

• Y10T137/7256

  Locks against rotary motion · CPC title

• F16K7/12

  with flat, dished, or bowl-shaped diaphragm · CPC title

• F16K35/025

  said actuating element being operated manually (e.g. a push-button located in the valve actuator) · CPC title

• F16K35/02 Primary

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

• F16K35/06 Primary

  using a removable actuating or locking member, e.g. a key (F16K35/10, F16K35/12 take precedence) · CPC title