CA1043387A - Coupling for tubing or the like and method for making it - Google Patents
Coupling for tubing or the like and method for making itInfo
- Publication number
- CA1043387A CA1043387A CA250,307A CA250307A CA1043387A CA 1043387 A CA1043387 A CA 1043387A CA 250307 A CA250307 A CA 250307A CA 1043387 A CA1043387 A CA 1043387A
- Authority
- CA
- Canada
- Prior art keywords
- stem
- body member
- groove
- bore
- fluid
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- 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
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/20—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members
- F16L33/207—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Pressure Members (AREA)
Abstract
Abstract of the Disclosure A coupling for a tube such as, for example, a hydraulic hose or the like has a body member adapted to be attached to another coupling or fitting and a stem portion adapted to be inserted in the bore of the tube. The body member and the stem portion are formed separately and the stem portion is inserted in the bore of the body member and secured thereto with a fluid tight seal. The body member has an annular groove in the wall surrounding its bore and the stem portion has its end flared outwardly such as by staking into this groove.
An annular flange on the stem portion is held firmly there-against to form a rigid fluid tight seal.
An annular flange on the stem portion is held firmly there-against to form a rigid fluid tight seal.
Description
10~3387 This invention relates generally to couplings for tubes such as, for example, hydraulic hose and more par-ticularly to a rigid coupling for the end of a flexible tube or hose having one end adapted to be inserted in the bore of the tube and another end threaded or otherwise provided with means for attaching the coupling to another coupling, a fitting or the like.
A rigid coupling member adapted to be secured to the end of a flexible hose or the like may be prepared in one piece by a machining process. The resulting fitting is relatively expensive, however, so efforts have been made to provide fittings in which the stem portion or ferrule is made in one piece and is then attached to a body member of larger dimensions. Various means have been proposed for securing the ferrule in the bore of the body member to provide swivel joints or fluid tight seals. For example, a swivel coupling having an O-ring to form a fluid tight seal is disclosed in U.S. Patent 2,542,701. Such a structure is relatively ex-pensive and thus, is not used extensively for connecting the end of a hose to another coupling or source of hydraulic fluid.
A two-piece coupling having a ferrule secured in the bore of the body member is disclosed in U.S. Patent 2,127,611.
The body member is provided with an internal groove and the ferrule has one end provided with a flange which extends radial-ly inwardly from the wall of the ferrule. The ferrule has a tapered head providing a shoulder which rests on the end of the body member when the flanged end of the ferrule is opposite the groove and the body member. The flanged end is flared 104~
outwardly into the groove to secure the two pieces together.
The axial dimension of the portion of the ferrule flared outwardly into the groove is less than the axial dimension of the groove so that the ferrule can move longitudinally with respect to the body member. Also, the ferrule fits loosely in the bore of the body member to provide further for relative movement.
It is an object of this invention to provide a coupling adapted to be used on the end of a tube such as, for example, a flexible hydraulic hose which forms a rigid connection be-tween the end of the tube and another coupling, fitting or the like. Still another object of the invention is to pro-vide a relatively inexpensive coupling member made from two pieces rigidly secured together in a fluid tight seal. A
still further object of the invention is to provide an im-proved coupling for use on hydraulic hose which can be made by a simple inexpensive process and provides a rigid fluid tight seal between the tube and another coupling or the like.
Other objects will become apparent from the following description with reference to the accompanying drawing wherein Figure 1 illustrates in perspective one embodiment of the finished coupling;
Figure 2 illustrates a stem in elevation and a body element in longitudinal section as they appear prior to assembly to form one embodiment of the invention;
Figure 3 illustrates partially in elevation and partially in longitudinal section the two parts assembled prior to staking to secure them together; and Figure 4 is an enlarged fragmentary view in longi-tudinal section illustrating the joint which rigidly secures the stem to the body member and an embodiment of a suitable tool for forming the joint.
The foregoing objects and others are accomplished in accordance with this invention, generally speaking, by pro-viding a coupling member for the end of a flexible tube, hose or the like, having a body member provided with a bore and with a means such as, for example, external or internal threads adapted to removably attach the coupling to another coupling or other pipe or tube fitting. An annular groove is formed in the internal wall of the body member about the bore. One end of a stem adapted to be inserted in the bore of the tube or hose is inserted in one end of the body member and has its end flared radially outwardly into the groove to form a rigid fluid tight seal. An annular flange extends radially outwardly from the wall of the stem and is spaced from the end of the stem which is flared radially outward a distance whereby it is pressed firmly against the surface of the end of the body member when the stem and the body member are secured together by flaring the end of the stem radially outwardly into the groove.
A second fluid tight seal is formed between the surface of the annular flange and the end of the body member. The body member is provided with a polygonal nut structure adapted to receive a wrench and the groove about the bore is preferably opposite this enlarged nut portion of the body member. An annular flange extends radially outwardly from the wall of the body member about that end which will lie against the flange on 1043~87 the stem. The stem portion of the coupling may be provided with a plurality of longitudinally spaced rings or flanges adapted to become embedded into a tube to assist in forming a fluid tight seal.
Referring now to the drawing, the illustrated embodi-ment of the coupling of the invention has a body member 10 and a stem 19 secured thereto to form the coupling. Body member 10 has a nut portion 12 hexagonal in shape and adapted to receive a wrench. In the illustrated embodiment external threads 13 are provided on the body member 10 on one side of the nut portion 12 and a sleeve portion 14 is provided at the other end. Sleeve portion 14 terminates in an end portion having a radial outwardly extending flange member 15 which combines with the end of the sleeve 14 to form a smooth surface 17 which is substantially perpendicular to the longitudinal axis of the coupling.
A bore 16 extends through body member 10. An annular groove 18 is provided in the wall surrounding bore 16 opposite the nut portion 12. Groove 18 is preferably rectangular in cross-section as illustrated. It is important that the sur-face of the groove adjacent to flange 15 be substantially perpendicular to the longitudinal axis of body member 10 and thus substantially parallel to surface 17 on the end of body member 10.
In assembling stem 19 with a body member 10, one end of stem 19 is inserted in bore 16 as sillustrated in Figures 2 and 3 of the drawing. Stem 19 is moved in bore 16 until the under surface of annular flange 20 is resting on surface 17 at the end of body member 10. A
suitable staking tool, such as, for example, punch 23 is in-serted into bore 16 and rotated to turn the end of stem 19 radially outwardly into groove 18. The shape of the staking tool and the pressure exerted thereby against the end of stem 19 should be such that a shoulder 21 is formed on the resulting flange 22 which presses tightly against the shoulder formed at the intersection of the wall of groove 18 and the wall of bore 16 as illustrated in Figure 4. This shoulder 21 ensures a fluid tight seal between the end of stem 19 and the wall of groove 18. The spacing of flange 20 from the end of stem 19 is such that it is pulled tightly against surface 17 as the end of the stem 19 is flanged outwardly and is tightly pressed thereagainst to form a fluid tight seal.
In the illustrated embodiment, body member lO has ex-ternal threads 13 but it may have internal threads or any other means for securing the body member to another coupling or fitting such as, for example, by crimping, swaging or the like. As illustrated in the drawing, stem 19 may have a plurality of rings 24 to assist in forming a fluid tight seal when the stem portion of the fitting is inserted into the bore of a tube or hose. The invention provides a coupling which is relatively inexpensive to manufacture adapted to be quickly secured to the end of a tube or hose which is rigid and adapted for the conveyance of fluids under pressure without leakage between the stem portion of the fitting and the body member. The two pieces can be formed separately and assembled by a simple s~aking operation to form a rigid fluid tight coupling.
Although the invention is described in detail for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations can be made therein by those skilled in the art without departing from the spirit and scope of the invention except as it may be limited by the claims.
A rigid coupling member adapted to be secured to the end of a flexible hose or the like may be prepared in one piece by a machining process. The resulting fitting is relatively expensive, however, so efforts have been made to provide fittings in which the stem portion or ferrule is made in one piece and is then attached to a body member of larger dimensions. Various means have been proposed for securing the ferrule in the bore of the body member to provide swivel joints or fluid tight seals. For example, a swivel coupling having an O-ring to form a fluid tight seal is disclosed in U.S. Patent 2,542,701. Such a structure is relatively ex-pensive and thus, is not used extensively for connecting the end of a hose to another coupling or source of hydraulic fluid.
A two-piece coupling having a ferrule secured in the bore of the body member is disclosed in U.S. Patent 2,127,611.
The body member is provided with an internal groove and the ferrule has one end provided with a flange which extends radial-ly inwardly from the wall of the ferrule. The ferrule has a tapered head providing a shoulder which rests on the end of the body member when the flanged end of the ferrule is opposite the groove and the body member. The flanged end is flared 104~
outwardly into the groove to secure the two pieces together.
The axial dimension of the portion of the ferrule flared outwardly into the groove is less than the axial dimension of the groove so that the ferrule can move longitudinally with respect to the body member. Also, the ferrule fits loosely in the bore of the body member to provide further for relative movement.
It is an object of this invention to provide a coupling adapted to be used on the end of a tube such as, for example, a flexible hydraulic hose which forms a rigid connection be-tween the end of the tube and another coupling, fitting or the like. Still another object of the invention is to pro-vide a relatively inexpensive coupling member made from two pieces rigidly secured together in a fluid tight seal. A
still further object of the invention is to provide an im-proved coupling for use on hydraulic hose which can be made by a simple inexpensive process and provides a rigid fluid tight seal between the tube and another coupling or the like.
Other objects will become apparent from the following description with reference to the accompanying drawing wherein Figure 1 illustrates in perspective one embodiment of the finished coupling;
Figure 2 illustrates a stem in elevation and a body element in longitudinal section as they appear prior to assembly to form one embodiment of the invention;
Figure 3 illustrates partially in elevation and partially in longitudinal section the two parts assembled prior to staking to secure them together; and Figure 4 is an enlarged fragmentary view in longi-tudinal section illustrating the joint which rigidly secures the stem to the body member and an embodiment of a suitable tool for forming the joint.
The foregoing objects and others are accomplished in accordance with this invention, generally speaking, by pro-viding a coupling member for the end of a flexible tube, hose or the like, having a body member provided with a bore and with a means such as, for example, external or internal threads adapted to removably attach the coupling to another coupling or other pipe or tube fitting. An annular groove is formed in the internal wall of the body member about the bore. One end of a stem adapted to be inserted in the bore of the tube or hose is inserted in one end of the body member and has its end flared radially outwardly into the groove to form a rigid fluid tight seal. An annular flange extends radially outwardly from the wall of the stem and is spaced from the end of the stem which is flared radially outward a distance whereby it is pressed firmly against the surface of the end of the body member when the stem and the body member are secured together by flaring the end of the stem radially outwardly into the groove.
A second fluid tight seal is formed between the surface of the annular flange and the end of the body member. The body member is provided with a polygonal nut structure adapted to receive a wrench and the groove about the bore is preferably opposite this enlarged nut portion of the body member. An annular flange extends radially outwardly from the wall of the body member about that end which will lie against the flange on 1043~87 the stem. The stem portion of the coupling may be provided with a plurality of longitudinally spaced rings or flanges adapted to become embedded into a tube to assist in forming a fluid tight seal.
Referring now to the drawing, the illustrated embodi-ment of the coupling of the invention has a body member 10 and a stem 19 secured thereto to form the coupling. Body member 10 has a nut portion 12 hexagonal in shape and adapted to receive a wrench. In the illustrated embodiment external threads 13 are provided on the body member 10 on one side of the nut portion 12 and a sleeve portion 14 is provided at the other end. Sleeve portion 14 terminates in an end portion having a radial outwardly extending flange member 15 which combines with the end of the sleeve 14 to form a smooth surface 17 which is substantially perpendicular to the longitudinal axis of the coupling.
A bore 16 extends through body member 10. An annular groove 18 is provided in the wall surrounding bore 16 opposite the nut portion 12. Groove 18 is preferably rectangular in cross-section as illustrated. It is important that the sur-face of the groove adjacent to flange 15 be substantially perpendicular to the longitudinal axis of body member 10 and thus substantially parallel to surface 17 on the end of body member 10.
In assembling stem 19 with a body member 10, one end of stem 19 is inserted in bore 16 as sillustrated in Figures 2 and 3 of the drawing. Stem 19 is moved in bore 16 until the under surface of annular flange 20 is resting on surface 17 at the end of body member 10. A
suitable staking tool, such as, for example, punch 23 is in-serted into bore 16 and rotated to turn the end of stem 19 radially outwardly into groove 18. The shape of the staking tool and the pressure exerted thereby against the end of stem 19 should be such that a shoulder 21 is formed on the resulting flange 22 which presses tightly against the shoulder formed at the intersection of the wall of groove 18 and the wall of bore 16 as illustrated in Figure 4. This shoulder 21 ensures a fluid tight seal between the end of stem 19 and the wall of groove 18. The spacing of flange 20 from the end of stem 19 is such that it is pulled tightly against surface 17 as the end of the stem 19 is flanged outwardly and is tightly pressed thereagainst to form a fluid tight seal.
In the illustrated embodiment, body member lO has ex-ternal threads 13 but it may have internal threads or any other means for securing the body member to another coupling or fitting such as, for example, by crimping, swaging or the like. As illustrated in the drawing, stem 19 may have a plurality of rings 24 to assist in forming a fluid tight seal when the stem portion of the fitting is inserted into the bore of a tube or hose. The invention provides a coupling which is relatively inexpensive to manufacture adapted to be quickly secured to the end of a tube or hose which is rigid and adapted for the conveyance of fluids under pressure without leakage between the stem portion of the fitting and the body member. The two pieces can be formed separately and assembled by a simple s~aking operation to form a rigid fluid tight coupling.
Although the invention is described in detail for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations can be made therein by those skilled in the art without departing from the spirit and scope of the invention except as it may be limited by the claims.
Claims (6)
1. A rigid coupling member for a tube or the like comprising a body member having a bore there-through with one end adapted to receive an end of a stem, said stem having a wall with a cross-section whereby a first end thereof fits snugly in said bore, a groove in the body member surrounding the said bore and spaced longitudinally from said end thereof, a flange extending radially outwardly from said stem and disposed from said first end a distance whereby said first end is opposite the said groove when the flange rests on the end of the body member, said first end of the stem being flared outwardly in the said groove and pressed in fluid-tight relationship therein and holding said annular flange in a rigid fluid-tight seal against the end of the body member.
2. The coupling member of Claim 1 having a polygonal shaped nut portion on the body member and wherein said groove is disposed diametrically opposite the nut portion.
3. The coupling member of Claim 1 wherein the outwardly flared end portion of the stem has a shoulder which is pressed against the wall of the groove.
4. The coupling member of Claim 1 wherein a nut portion is disposed on the body element, said groove is diametrically opposite the nut portion, the flared end of the stem has a shoulder pressed into a fluid-tight seal against a wall of the groove and the annular flange on the stem is pressed firmly against the body element to form a fluid-tight seal.
5. A method for making a rigid coupling member for a tube or hose which comprises inserting a stem hav-ing a flange thereabout in a bore of the body member with the flange adjacent to an end of the body member, said bore having an annular groove thereabout, flaring the end of the stem outwardly into the groove and pressing it against the wall of the groove to form a first fluid-tight seal and to pull the flange against the said end of the body member to form a second fluid-tight seal.
6. A hydraulic hose adapted to conduct a fluid under pressure comprising a flexible hose having a wall surrounding a bore therethrough and a rigid coupling member attached to an end of the hose, said coupling member comprising a body member having a bore therethrough with one end adapted to receive an end of a stem, a stem having a wall with a cross-section whereby a first end thereof fits snugly in said bore, a groove in the body member surrounding the said bore and spaced longitudinally from said end thereof, a flange extending radially outwardly from said stem and disposed from said first end a distance whereby said first end is opposite the said groove when the flange rests on the end of the body member, said first end of the stem being flared outwardly in the said groove and pressed in fluid-tight relationship therein and holding said annular flange in a rigid fluid-tight seal against the end of the body member.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US59733475A | 1975-07-21 | 1975-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1043387A true CA1043387A (en) | 1978-11-28 |
Family
ID=24391084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA250,307A Expired CA1043387A (en) | 1975-07-21 | 1976-04-14 | Coupling for tubing or the like and method for making it |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5213124A (en) |
| BE (1) | BE841484A (en) |
| CA (1) | CA1043387A (en) |
-
1976
- 1976-04-14 CA CA250,307A patent/CA1043387A/en not_active Expired
- 1976-05-05 BE BE166754A patent/BE841484A/en unknown
- 1976-05-08 JP JP5275476A patent/JPS5213124A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BE841484A (en) | 1976-09-01 |
| JPS5213124A (en) | 1977-02-01 |
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