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Tube fitting

a technology of tube fittings and fittings, which is applied in the direction of adjustment joints, pipe joints, couplings, etc., can solve the problems of increasing inflexibility of the connection tube during use, transmission of vibration and shock to the air supply side of the tube fitting, and constant transmission of vibration and shock to the hand-operated air tool, etc., to achieve the effect of absorbing or decreasing the transmission of vibration or shock

Inactive Publication Date: 2006-04-27
ISHII +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The tube fitting effectively absorbs and reduces vibration and shock, maintaining pressure resistance and connection strength while improving handling and workability of air tools.

Problems solved by technology

The connecting tube tends to increase inflexibility during use due to the pressure resistant structure of the tube and a pressure applied from the pressurized air flowing therethrough.
When the tube fitting is supplied with pressurized air, the air supplying side of the tube fitting is subjected to continuously transmitted vibration and shock due to pressurization from the air compression source.
In addition, the transmitted vibration and shock propagate to the hand operated air tool via the connecting tube.
Thus, there has been a possibility of causing various unfavorable effects not only to the tube fitting, but also to the air compression source, the hand operated air tool, and workers.
If such a vibration absorbing mechanism or vibration buffering mechanism is independently provided in the flow path, the flow path system itself becomes unnecessarily complicated or complex.
Further, various unfavorable problems arise such as degrading the workability, causing a failure, and the like.
This is not always effective countermeasure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0032]FIG. 1 schematically shows a basic form of a tube fitting according to a first embodiment of the present invention. FIG. 1A is a partially sectional side view, and FIG. 1B is a longitudinal sectional view. FIG. 2 shows an intermediate connection member used in the tube fitting shown in FIG. 1. FIG. 2A is a perspective view, and FIG. 2B is a longitudinal sectional view.

[0033] The tube fitting 10 according to the first embodiment of the present invention shown in FIG. 1 comprises a connection head 11, a connection nipple 31, and an intermediate connection member 51.

[0034] The connection head 11 is made of a relatively rigid material, such as, for example, resin or metal, preferably metal. On the outer surface of an end of the connection head 11, there are provided a male thread 12 and a hexagonal head 13. The male thread 12 is used to be screwed to a connected object, such as an air tool for supplying pressurized fluid. The hexagonal head 13 is used for a spanner wrench to be ...

second embodiment

[0047]FIG. 6 schematically shows a tube fitting according to a second embodiment of the present invention. FIG. 6A is a partially sectional side view. FIG. 6B is a longitudinal sectional view.

[0048] The tube fitting 10a according to the second embodiment is to provide an axially rotatable connection head 21 instead of the connection head 11 of the tube fitting 10 of the first embodiment.

[0049] In FIG. 6, the connection head 11 comprises a stationary head 23 and a rotatable head 22. The stationary head 23 is connected to the intermediate connection member by inserting the annular collar into the groove of the intermediate connection member, and the rotatable head 22 is mounted on the stationary head 23. In order to rotate the head 22, a predetermined number of ball bearings 26 are arranged in a hemispheric annular channels 24 and 25 formed on the inner and outer surfaces of the stationary and rotatable head 23 and 22. Further, a Y-shaped seal ring 27 is provided for preventing the ...

third embodiment

[0051]FIG. 7 schematically shows a tube fitting according to a third embodiment of the present invention. FIG. 7A is a partially sectional side view. FIG. 7B is a longitudinal sectional view.

[0052] The tube fitting 10b according to the third embodiment is to provide an axially rotatable connection nipple 41 instead of the connection nipple 31 of the tube fitting 10 of the first embodiment.

[0053] The tube fitting 10b according to the third embodiment shown in FIG. 7 is almost the same structure as that of the tube fitting 10a of the second embodiment. In FIG. 7, the connection nipple 31 comprises a stationary nipple 43 and a rotatable nipple 42. The stationary nipple is connected to the intermediate connection member 51 by inserting the annular collar into the annular groove of the intermediate connection member, and the rotatable connection nipple 42 is mounted on the stationary nipple 43. In order to rotate nipple 42, a predetermined number of ball bearings 46 are arranged in a h...

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PUM

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Abstract

A tube fitting capable of absorbing vibration and shock resulting from a high pressure fluid passing through the tube fitting while it is used includes a connection head, a connection nipple, and an intermediate connection member. The connection head and the connection nipple are provided with an annular collar projecting from an end surface of the connection head and the connection nipple. The connection head, the connection nipple and the intermediate connection member are joined by inserting the annular collars into both ends of the intermediate connection member.

Description

CROSS REFERENCES TO RELATED APPLICATIONS [0001] This application is a continuation of U.S. patent application Ser. No. 10 / 425,086 filed on Apr. 28, 2003.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH [0002] Not Applicable BACKGROUND OF THE INVENTION [0003] The present invention relates to a tube fitting having an air inlet at one end and an air outlet at other end adapted for use in connecting an air tool to the air outlet and a tube or pipe to the air inlet for supplying pressurized air to the air tool. More particularly, the present invention relates to a tube fitting for effectively absorbing a vibration and shock transmitted to the pipe fitting during use. [0004] In various manual air tools actuated by pressurized air, a tube fitting is used at an air inlet or outlet portion of the air tool, or an intermediate portion of the pressurized air path. The tube fitting is connected to an air source by means of a pressure-resistant and flexible hose or tube to be inserted into the co...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F16L13/00F16L27/08F16L37/00F16L55/04
CPCF16L37/00F16L55/041F16L2201/00
Inventor ISHIIYANO, KAZUO
Owner ISHII