Valve core

Patent metadata

Field	Value
Publication number	US-10428968-B2
Application number	US-201615761791-A
Country	US
Kind code	B2
Filing date	Mar 22, 2016
Priority date	Jan 22, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A valve core capable of suppressing manufacturing costs, including: a first core cylinder body, a second core cylinder body having a valve opening on an opposite side to the first, a movable member having a valve body which opens and closes the valve opening at the front end of a shaft section linearly movably extending through the insides of the core cylinder bodies, an elastic member in contact with the movable member and the first body and biasing to sandwich the second body between the first and valve body, and a pair of fitting sections including a first and a second fitting section on the core cylinder bodies and which are rotatably fitted and are separable from each other without interfering. The fitting sections have cylindrical shapes that are detachably fitted to each other, and the first section has a stepped surface with which the second section is in contact.

First claim

The invention claimed is:

1. A valve core comprising:
a first core cylinder body having a male screw to be screwed into a female screw of a core mounting hole;
a second core cylinder body arranged on a deeper side than the first core cylinder body in the core mounting hole and having an opening as a valve opening on an opposite side to the first core cylinder body;
an outer peripheral seal portion provided on the second core cylinder body and to be in contact with a portion on a deeper side than the female screw of the core mounting hole;
a movable member having a valve body to open and close the valve opening at an end of a shaft section linearly movably penetrating inside the first core cylinder body and the second core cylinder body;
an elastic member in contact with the movable member and the first core cylinder body and biasing so as to sandwich the second core cylinder body between the first core cylinder body and the valve body; and
a pair of fitting sections including a first fitting section and a second fitting section which are provided in the first core cylinder body and the second core cylinder body and which are rotatably fitted to each other and are separable without interfering with each other,
wherein the pair of fitting sections have cylindrical shapes that are detachably fitted to each other, and
the first fitting section has a stepped surface with which an end surface of the second fitting section is in contact.

2. The valve core according to claim 1 , wherein
the outer peripheral seal portion is formed by coating the second core cylinder body with a sealing material.

3. The valve core according to claim 2 wherein
the valve opening has a tapered inner surface which gradually increases in diameter toward a valve body side and with which the valve body comes in contact, and the tapered inner surface is coated with the sealing material constituting the outer peripheral seal portion.

4. The valve core according to claim 3 , wherein
the first fitting section is formed by enlarging with a step, a diameter of an inner peripheral surface of the second core cylinder body on a first core cylinder body side shifted from the tapered inner surface, and the end surface of the second fitting section is in contact with the stepped surface of the first fitting section, and
only the inner peripheral surface of the second core cylinder body on the tapered inner surface side shifted from the stepped surface is coated with the sealing material.

5. The valve core according to claim 3 , wherein
the second fitting section is formed by reducing with a step so that the second fitting section has a stepped surface, a diameter of an outer peripheral surface of the second core cylinder body on a first core cylinder body side, and the end surface of the second fitting section is in contact with the stepped surface of the first fitting section, and
only the outer peripheral surface of the second core cylinder body on a side away from the first core cylinder body farther than the stepped surface of the second core cylinder body is coated with the sealing material.

6. The valve core according to claim 1 , wherein
a fitting depth of the pair of fitting sections is larger than a linear movement stroke of the movable member.

7. The valve core according to claim 2 , wherein
a fitting depth of the pair of fitting sections is larger than a rectilinear movement stroke of the movable member.

8. The valve core according to claim 3 , wherein
a fitting depth of the pair of fitting sections is larger than a rectilinear movement stroke of the movable member.

9. The valve core according to claim 4 , wherein
a fitting depth of the pair of fitting sections is larger than a rectilinear movement stroke of the movable member.

10. The valve core according to claim 5 , wherein
a fitting depth of the pair of fitting sections is larger than a rectilinear movement stroke of the movable member.

11. The valve core according to claim 1 , further comprising
a spring locking portion formed by enlarging a diameter of an end of the shaft section on an opposite side to the valve body,
wherein the elastic member is a compression coil spring into which the shaft section is inserted so that one end of the compression coil spring is engaged with the spring locking portion, and another end is engaged with an end of the first core cylinder body on an opposite side to the second core cylinder body.

12. The valve core according to claim 2 , further comprising
a spring locking portion formed by enlarging a diameter of an end on an opposite side of the shaft section from the valve body,
wherein the elastic member is a compression coil spring into which the shaft section is inserted so that one end of the compression coil spring is engaged with the spring locking portion, and another end is engaged with an end on an opposite side of the first core cylinder body from the second core cylinder body.

13. The valve core according to claim 3 , further comprising
a spring locking portion formed by enlarging a diameter of an end on an opposite side of the shaft section from the valve body,
wherein the elastic member is a compression coil spring into which the shaft section is inserted so that one end of the compression coil spring is engaged with the spring locking portion, and another end is engaged with an end on an opposite side of the first core cylinder body from the second core cylinder body.

14. The valve core according to claim 4 , further comprising
a spring locking portion formed by enlarging a diameter of an end on an opposite side of the shaft section from the valve body,
wherein the elastic member is a compression coil spring into which the shaft section is inserted so that one end of the compression coil spring is engaged with the spring locking portion, and another end is engaged with an end on an opposite side of the first core cylinder body from the second core cylinder body.

15. The valve core according to claim 5 , further comprising
a spring locking portion formed by enlarging a diameter of an end on an opposite side of the shaft section from the valve body,
wherein the elastic member is a compression coil spring into which the shaft section is inserted so that one end of the compression coil spring is engaged with the spring locking portion, and another end is engaged with an end on an opposite side of the first core cylinder body from the second core cylinder body.

16. The valve core according to claim 6 , further comprising
a spring locking portion formed by enlarging a diameter of an end on an opposite side of the shaft section from the valve body,
wherein the elastic member is a compression coil spring into which the shaft section is inserted so that one end of the compression coil spring is engaged with the spring locking portion, and another end is engaged with an end on an opposite side of the first core cylinder body from the second core cylinder body.

Assignees

• Taiheiyo Kogyo Kk

Inventors

• Yamamoto Masahiko
• AIMOTO Masatoshi

Classifications

• F16K15/205

  and with closure plug · CPC title

• B60C29/002

  characterised by particular features of the valve core · CPC title

• F16K1/34

  Cutting-off parts, e.g. valve members, seats (F16K1/06, F16K1/12, F16K1/14, F16K1/26 take precedence) · CPC title

• F16K15/063

  the valve being loaded by a spring · CPC title

• F16K15/06

  with guided stems · CPC title