KR101647929B1 - Apparatus for manufacturing pipe connector - Google Patents

Apparatus for manufacturing pipe connector Download PDF

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Publication number
KR101647929B1
KR101647929B1 KR1020150167144A KR20150167144A KR101647929B1 KR 101647929 B1 KR101647929 B1 KR 101647929B1 KR 1020150167144 A KR1020150167144 A KR 1020150167144A KR 20150167144 A KR20150167144 A KR 20150167144A KR 101647929 B1 KR101647929 B1 KR 101647929B1
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KR
South Korea
Prior art keywords
union
pipe
joint
guide
connecting pipe
Prior art date
Application number
KR1020150167144A
Other languages
Korean (ko)
Inventor
김윤수
Original Assignee
김윤수
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to KR1020150167144A priority Critical patent/KR101647929B1/en
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Publication of KR101647929B1 publication Critical patent/KR101647929B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
    • B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P17/00—Metal-working operations, not covered by a single other subclass or another group in this subclass
    • B23P17/02—Single metal-working processes; Machines or apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/16—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars
    • F16L13/165—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars the pipe or collar being deformed by an axially movable sleeve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/005—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts comprising locking means for the threaded member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
    • B23P2700/11—Joints, e.g. ball joints, universal joints

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Joints With Pressure Members (AREA)

Abstract

The present invention relates to an apparatus to manufacture a pipe connector to exclude a combination with a screw in combining a connecting pipe of the pipe connector and a union, to make it possible to select stainless steel as materials for the union, to remarkably reduce the cost for materials, to improve corrosion resistance and durability, which are important characteristics of a pipe member, to secure safety with no hazard to the human body, to especially make it possible to safely use the pipe member as the pipe member for apparatuses related to food and beverages such as a water purifier, and to remarkably improve productivity. According to the present invention, the apparatus to manufacture a pipe connector comprises: a pressurizer to pressurize a flange of a union by external force; and a guide supported by the pressurizer with elasticity in order to pressurize and fasten a union with a pipe formed and a connecting pipe with a stepped pulley unit whose internal diameter increases from the original diameter of the connecting pipe by corresponding to the external diameter of the pipe of the union. The guide comprises: a first end unit having an external diameter corresponding to an internal diameter of the connecting pipe to be inserted into the connecting pipe and to be guided; and a second end unit having an external diameter corresponding to an internal diameter of the union to be inserted into the union and to be guided, whose front end is supported by an end bump of the connecting pipe when the union is pressurized.

Description

[0001] APPARATUS FOR MANUFACTURING PIPE CONNECTOR [0002]

In the present invention, stainless steel is adopted as a material of a union by eliminating the screw connection in joining the joint pipe and the union of the pipe joint, thereby remarkably reducing the cost of the material, and the corrosion resistance and durability And is safe and harmless to the human body. Thus, the present invention relates to a pipe joint manufacturing apparatus that can be used safely as a piping member of a food and water related equipment such as a water purifier, and the productivity is remarkably improved.

In general, the piping pipe connecting the piping and the pipe connecting the piping to the liquid and the gas piping is closely maintained and the corrosion resistance and the durability are secured in order to be a safe passage of the fluid to be transferred. Especially, It is required that the human body is safe and harmless according to the material.

8, the conventional pipe joint 100 includes a joint pipe 110 coupled to the joint pipe 110, a union nut 130 connected to the joint pipe 110 and coupled to the other pipe 60, , And a joint 120 connecting the joint pipe 110 and the union nut 130. As shown in FIG.

In the manufacturing method of the prior art pipe joint, the joint pipe 110 is formed with threads on one inner circumferential surface and the other outer circumferential surface for joining with the connection pipe, and the union nut 130 is protruded and formed on one side .

The union 120 is formed with a flange 121 for holding the union end 131 of the union nut at one end of the tubular body and a threaded portion 125 formed on the tubular body for coupling with the coupling tube 110 .

The union 120 is a connecting means for connecting the union nut 130 to the coupling pipe 110 so as to be freely rotatable. The union 120 is fixedly coupled to the coupling pipe 110, The release of the union nut is prevented by the retaining end 121 and the retaining end 131 of the union nut and is freely rotatably engaged.

However, in the related art, since the coupling between the coupling pipe 110 and the union 120 is assembled by screwing, the manufacturing cost is increased and the productivity is not improved, and the corrosion resistance and durability are poor. Especially, There was a difficulty in securing harmless safety in a device related to the number.

The union 120 assembled by screwing is manufactured using brass containing a harmful component to the human body. Then, a coating is formed by plating with nickel or chromium, which is a high-priced material, in order to block harmful components and enhance corrosion resistance Followed by post-processing.

Such conventional techniques use brass which is relatively expensive compared to stainless steel which is harmless to the human body, thereby raising the material cost and further raising the manufacturing cost accompanied by a post-process for plating.

In addition, since it is manufactured from brass, it is poor in corrosion resistance and durability, which is the most important characteristic to be provided as a piping member. Therefore, when applied to food and water related equipment such as water purifier, There is a concern.

In addition, in the coupling of the joint pipe and the union, the screw coupling method wastes time and manpower, and the manufacturing productivity is lowered, thereby increasing the manufacturing cost.

The reason why the stainless steel which is relatively low in cost and relatively harmless to the human body and has good corrosion resistance can not be used and the brass can not be used as a material in spite of various problems is that the joint 120 Is required to form the threaded portion 125 by using the screw fastening method.

In other words, although stainless steel is difficult to cut to form threads as difficult-to-break materials, there is a problem that brass is inevitably used as a union material accompanied by a thread even though it has many problems as described above.

The present invention has been made to solve the above problems,

It is an object of the present invention to provide a pipe joint and a union of a pipe joint which can be used in a stainless steel material, It is possible to improve the corrosion resistance and durability, which are important characteristics that the piping member must have, and to secure the harmless safety to the human body. Thus, the safety of the piping member of the drinking water related equipment such as water purifier is assured, And a pipe joint manufacturing device.

According to an aspect of the present invention, there is provided an apparatus for manufacturing a pipe joint according to the present invention,

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A joint pipe formed with a stepped portion having an inner diameter larger than an inner diameter of a joint pipe corresponding to an outer diameter of the pipe body of the union at one side of the inner circumferential surface,

A pressing member for pressing the flange of the union by an external force and a guide elastically supported by the pressing member,

The guide has one end with an outer diameter corresponding to the inner diameter of the coupling tube for insertion and guidance in the coupling tube and an outer diameter corresponding to the inner diameter of the union for insertion and guidance in the union, And two end portions supported by the step.

In one embodiment according to the present invention,

The pusher is formed with an internal space having a through-hole to allow a part of the guide to be inserted and to be elastically supported,

Wherein the guide has a latching portion extending along the two end portions,

And an elastic member for supporting the latching portion may be installed in the inner space of the pusher.
The pipe joint according to the present invention for achieving the above object is manufactured by the pipe joint manufacturing apparatus and a pipe body of the union is press-fitted into the pipe joint.

According to the pipe joint manufacturing apparatus of the present invention, when the joint pipe of the pipe joint is coupled with the union, the fastening can be easily accomplished by eliminating the screw connection and performing the reciprocating operation of the pushing means once. Despite its advantages, stainless steel, which was difficult to use due to difficulty in machining, can be adopted.
In addition, it realizes the production automation of pipe joints and improves the assembly productivity remarkably.

The pipe joint according to the present invention manufactured by the above manufacturing apparatus

First, the burden of the material cost is remarkably reduced, the manufacturing cost is drastically reduced,

Second, since the corrosion resistance and the durability, which are the most important characteristics to be provided for the pipe joint as a pipe member, are good and the service life is semi-permanent,

Third, since it is harmless to the human body, safety is ensured especially as a piping member of food and water related equipment such as water purifier,

Fourth, since a post-process for coating a plating film is unnecessary, productivity is good,

Fifth, the productivity of assembling is remarkably increased, and the manufacturing cost is drastically lowered, such as facilitating assembly by an automatic apparatus, while the quality characteristic is improved.

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1 is an exploded perspective view of a pipe joint according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a pipe joint according to an embodiment of the present invention,
3 is a cross-sectional view of the fastening method of Fig. 2
Fig. 4 is a cross-sectional view of the fastening method of Fig. 2
Fig. 5 is a cross-
Figure 6 is a cross-sectional view of an embodiment of a pipe joint according to the present invention,
7 is a flowchart of a method of manufacturing a pipe joint according to an embodiment of the present invention.
8 is a cross-sectional view of a tube joint manufactured according to the prior art

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a pipe joint manufacturing apparatus according to the present invention and a pipe joint manufactured by the manufacturing apparatus will be described in detail with reference to the accompanying drawings.
As shown in Figs. 3 and 4, the apparatus for manufacturing a pipe joint according to one embodiment of the present invention comprises a united body 20 with a tubular body 21 formed therein and an inner circumferential surface at one side of the inner circumferential surface, A pressing member 70 for pressing the flange 23 of the union by an external force is provided for pressing the joint pipe 10 formed with the step portions 13a and 13b whose inner diameters are larger than the inner diameter 10d of the flange 23. [ And a guide 80 resiliently supported on the pusher 70. The guide 80 is inserted into the joint pipe 10 and inserted into the joint pipe 10 to be inserted into the joint pipe 10, (82) having an outer diameter corresponding to the inner diameter (21d) of the union for insertion and guidance in the end (81) and the union (20) and the tip end of which is supported on the step (13c) .
The pusher 70 is formed with an internal space 73 having a through hole 75 for receiving a part of the guide 80 and being elastically supported and the guide 80 is connected to the two ends 82 And an elastic member 90 for supporting the latching portion 83 is provided in the inner space 73 of the pusher.
The pipe joint 1 according to the present invention manufactured by the pipe joint manufacturing apparatus is such that the pipe body of the union 20 is press-fitted into the pipe joint 10 as shown in FIGS.
The pipe joint 1 according to the present invention is characterized in that it comprises a union nut assembling step for fitting the union nut 30 into the tube body 21 of the union 20 formed with the flange 23 at one side of the tube body 21, And joining the union 20 to the joint pipe 10 formed with the hexagonal portion 12 on the other side of the joint pipe 10, (10) for forming a groove (15) for fastening the union to one inner circumferential surface of the tubular body (21), molding a tubular body (21) of the union (20) (S20) of forming a union (20) to a dimension obtained by adding the length to the groove (15) and the length of the groove to be inserted into the groove when inserting into the joint pipe (10) , The union 20 having the union nut 30 fitted in the tube 21 is inserted into the coupling tube 10, The union pressing step S40 for pressing the union with the step P and the end portion of the union tube 21 are press-fitted and plastically deformed into the groove 15 of the joint pipe, (S50) of the union to be fastened.

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The groove (15) is formed in an annular shape.

The groove 15 is formed in an annular shape on the inner circumferential surface of the joint pipe 10 in the groove forming step S10 of the joint pipe and the union 20 can be pushed into the space of the groove 15 through the tube forming step of the union The length 21L of the tubular body is designed and molded.

As shown in FIGS. 2 to 4, the union nut 30 is inserted into the union 20 in the union nut assembling step S30, and the union pressing step S40 The union body 21 is received in the receiving jig Z so that the portion of the union body 21 longer than the corresponding length of the coupling tube is pressed into the groove 15 by the pressing means P, And the plastically deformed and plastically deformed portion is fastened to the joint pipe 10 as the fixing portion 21c fastened to the groove 15 of the joint pipe.

The union 20 fastened to the coupling pipe 10 by the forced indentation is firmly held in the fastened state, thereby eliminating the screw coupling in the coupling with the coupling pipe 10.

In order to facilitate plastic deformation of the tubular body 21 in the tube forming step S20 of the union, a step 21a having a thickness thinner than the thickness of the tubular body 21b is formed at the tip end,

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In the groove forming step S10 of the joint pipe 10, the inner diameter 12d of the inner diameter surface 10a of the joint pipe 10 is larger than that of the original inner diameter 10d, corresponding to the step portion 21a and the original thickness portion 21b of the union. The first stepped portion 13a and the second stepped portion 13b having an increased inner diameter are molded and the recessed portion 15 is formed by the stepped portion 13c at the tip of the first stepped portion 13a.

The tip end of the stepped portion 21a of the union 20 is received by the step 13c formed by the first stepped portion 13a of the joint pipe 10 in the union pressing step S40.

A portion of the distal end of the union step 21a is press-fitted and plastically deformed into the groove 15 of the joint pipe 10 in the press-fitting step S50 of the union.

The inner diameter 10d of the coupling pipe is formed to be smaller than the inner diameter 21d of the union so that the tip end of the union and the guide 80 of the pressing means P can be supported by the step 13c 4).

Since the groove 15 is formed in the step 13c, the step 13c of the joint pipe receives the tip of the tube 21 of the union in the union pressing step, so that the step of the fastening step is simplified.

In forming the tube 21 of the union, a step is provided to thin the tip portion so that plastic deformation of the union is smoothly performed.

The material of the union 20 is made of a stainless steel material which is easily plastic-deformed and is safe for a human body.

As shown in FIG. 6, the coupling pipe 10 may be formed into a polygonal tube shape such as a T-shaped structure to which an on / off valve V is connected, and the union 20 corresponds to the shape of the coupling pipe 2 Or more.

It will be appreciated by those skilled in the art that one or more O (O) rings 41 or sealing means such as packing may be interposed in the coupling portion of the coupling pipe 10 and the union 20.
Hereinafter, an operation state of the pipe joint manufacturing apparatus according to the present invention having the above-described structure for manufacturing the pipe joint 1 will be described with reference to FIGS. 3 and 4. FIG.
When the tubular body 21 of the union is inserted into the coupling tube 10 having the above-described structure, the tip end of the tubular body of the union is caught by the joint step 13c, and then the guide 80 of the manufacturing apparatus is inserted into the tubular body 21 of the union .
The first end 61 of the guide is inserted into the joint pipe 10 to guide the subsequent entry of the guide and the second end 82 has an outer diameter corresponding to the inner diameter 21d of the union, So as to guide the deformation of the union body toward the groove space when the union pressurizes.
Thereafter, the tip of the stepped portion 21a, which is formed to have a thin thickness so that the presser 70 presses the flange 23 of the union and is easily deformed in the tubular body 21 of the union, Which is press-fitted into the groove 15 of the plate-like member.
At this time, since the guide 80 is pressed by the elastic member 90 installed in the inner space of the presser 70, the guide 80 can perform the guide function without being affected by the movement of the presser 70.
As described above, the pipe joint manufacturing apparatus of the embodiment of the present invention realizes the production automation of the pipe joint by simply fastening the union 20 to the joint pipe 10 by the single reciprocating operation of the pusher 70, ≪ / RTI >

The pipe joint according to the present invention manufactured as described above has many advantages as a material of the union 20 in the prior art by eliminating the screwing in the fastening of the union 20 to the joint pipe 10, It enables the adoption of stainless steel which was not available.

Compared with brass used as a union material in the prior art, the stainless steel is remarkably inexpensive in material cost, has excellent corrosion resistance and durability, and is safe for the human body and is particularly suitable as a piping member of food and water related equipment such as water purifier Do.

Therefore, the apparatus for manufacturing pipe joints according to the present invention, which can adopt stainless steel as the material of the unions 20, can reduce the production cost of the pipe joints, thereby remarkably lowering the manufacturing cost, and exhibiting good corrosion resistance and durability, , And the safety of the product can be ensured without a post-process such as coating a film harmless to the human body.

In other words, since the union 20, which is a main component of the pipe joint, can be made of stainless steel, the manufacturing cost is drastically reduced, but the quality is remarkably improved.

Further, since the fastening process of the union 20 and the coupling pipe 10 is performed by the reciprocating operation of the pressing means once, the assembling time is significantly shortened compared with the conventional technology of the screwing process, and mass production by the automatic apparatus is facilitated, ≪ / RTI >

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Further, the pipe joint 1 of the present invention is widely applied to pipe joints of all fluid-related equipment pipe members such as oil and gas in addition to food and water related equipment such as water purifiers.

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As described above, the pipe joint manufacturing apparatus according to the present invention and the pipe joint manufactured by the pipe manufacturing apparatus have a simple and simple fastening by eliminating the screwing in the union of the joint pipe and pressing the pipe joint by one pressing operation. The cost is considerably lower than that of the brass used in the union, and the most important corrosion resistance and durability in the piping member are good, so that the lifespan is semi-permanent and the stainless steel material is safe for the human body. And it is an industrially applicable technology that facilitates mass production.

1, 1A; According to the present invention,
10: joint pipe 11: screw portion 13a: first step
13b: second step portion 13c: step 15: groove
20: Union 21: Tube 23: Flange
21c: Fixing portion 30: Union nut 41: O (O) ring
50, 60: connecting pipe 70: pressurizing means 80: guide
Z: Support jig V: Opening valve

Claims (8)

delete delete delete delete delete (10) formed with a stepped portion having an inner diameter larger than an inner diameter (10d) of the joint pipe corresponding to the outer diameter of the pipe body of the union at one side of the inner peripheral surface; for,
A pressing member (70) for pressing the flange (23) of the union by external force and a guide (80) resiliently supported by the pressing member (70)
The guide 80 includes a first end 81 having an outer diameter corresponding to the inner diameter 10d of the coupling tube for insertion and guidance in the coupling tube 10, And a second end portion (82) having an outer diameter corresponding to the first end portion (21d) and the tip end of which is supported by the step (13c) of the joint pipe when the union is pressurized. The method of claim 6,
The pusher 70 is formed with an internal space 73 having a through hole 75 for receiving a part of the guide 80 and being elastically supported,
The guide (80) is provided with a locking portion (83) in communication with the second end (82)
Wherein an elastic member (90) for supporting the latching part (83) is installed in the internal space (73) of the pusher. delete
KR1020150167144A 2015-11-27 2015-11-27 Apparatus for manufacturing pipe connector KR101647929B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150167144A KR101647929B1 (en) 2015-11-27 2015-11-27 Apparatus for manufacturing pipe connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150167144A KR101647929B1 (en) 2015-11-27 2015-11-27 Apparatus for manufacturing pipe connector

Publications (1)

Publication Number Publication Date
KR101647929B1 true KR101647929B1 (en) 2016-08-11

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ID=56714356

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Application Number Title Priority Date Filing Date
KR1020150167144A KR101647929B1 (en) 2015-11-27 2015-11-27 Apparatus for manufacturing pipe connector

Country Status (1)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS552898A (en) * 1978-06-19 1980-01-10 Ridenour Ralph Gaylord Tube fitting instrument assembly and its forming method
JPH0649022U (en) * 1992-12-18 1994-07-05 櫻護謨株式会社 Composite joint structure
JPH1078177A (en) * 1996-08-30 1998-03-24 Usui Internatl Ind Co Ltd Connecting structure between joint and piping end part and connecting method thereof
KR200404438Y1 (en) * 2005-10-14 2005-12-22 김윤수 A structure of pipe joint

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS552898A (en) * 1978-06-19 1980-01-10 Ridenour Ralph Gaylord Tube fitting instrument assembly and its forming method
JPH0649022U (en) * 1992-12-18 1994-07-05 櫻護謨株式会社 Composite joint structure
JPH1078177A (en) * 1996-08-30 1998-03-24 Usui Internatl Ind Co Ltd Connecting structure between joint and piping end part and connecting method thereof
KR200404438Y1 (en) * 2005-10-14 2005-12-22 김윤수 A structure of pipe joint

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