BRPI0608425B1 - FEMALE PART OF WIDE CONE FITTING AND METHOD TO PRODUCE A FEMALE PART - Google Patents

Description

(54) Title: FEMALE PART OF FITTING IN EXTENDED CONE AND METHOD FOR PRODUCING A FEMALE PART (73) Holder: THE GATES CORPORATION, North American Society. Address: 1551 Wewatta Street, Denver, CO 80202, UNITED STATES OF AMERICA (US) (72) Inventor: COLIN KNIGHT

Validity Term: 10 (ten) years from 10/02/2018, subject to legal conditions

Issued on: 10/02/2018

Digitally signed by:

Liane Elizabeth Caldeira Lage

Director of Patents, Computer Programs and Topographies of Integrated Circuits

FEMALE PART OF THE ENLARGED CONE FITTING AND METHOD FOR

PRODUCING A FEMALE PART

BACKGROUND OF THE INVENTION

TECHNICAL FIELD

The present invention relates, in general, to hydraulic hose fittings. More particularly, it concerns extended cone fittings and, more specifically, the present invention concerns better female parts of extended cone terminals for tube and hose fittings.

DESCRIPTION OF PREVIOUS TECHNOLOGY

Extended cone fittings are known in the technology. Typically, the female part forms part of a separate fitting or connector that connects a hydraulic hose to a machine, equipment or instrument, or is attached to a tube that connects the pipe to a machine, equipment or instrument, or is part of it.

As shown in figures 1 and 2 of the prior art, a female part of the extended cone fitting 100 or 200 includes tube 101, nut 102 or 202, hole 103 and hose rod 104. The hose rod 104 may include ferrule collar 106, hose stop 107 and fastening ribs 109. Tube 101 can be curved, as shown, or straight. The end of tube 101 is extended to the point where it has an inverted tapered annular space or tapered face 115 at the open end of the tube. The inverted conical annular space has a substantially internal diameter of 06/28/2018, p. 9/29 equal to the inner diameter of the tube from which the annular space is created.

In a form of the female part represented in Figure 1 of the prior art as 110, the inverted tapered annular space 115 is not supported by any additional reinforcement. Instead, it merely has an inner shape that corresponds to the outer shape of the male part of the coupling and an outer shape that corresponds to the inner shape of nut 102. The nut tightens the tapered annular space between itself and the male part (see figure 1). To connect the female part to the male part, a nut, with internal thread 120 covering part of its interior and with a non-threaded part of reduced diameter 121 corresponding to the outer surface of the inverted conical annular space covering the remaining part of the nut, fits over the tube and around the inverted conical annular space. The male part has a conical face and external thread close to the face. Through connection, the nut is threaded by the external thread of the male part. The threading action reduces the distance between the tapered face and the nut, whereby the inverted tapered annular space and the tapered face are placed in sealing contact.

When the nut is applied, the inverted tapered annular space is secured against the outside of the male part, but without elasticity or flexibility. Problematically, the tightening of the nut results in a tendency for the nut to jam on the outer surface of the inverted conical annular space. In this condition, the torque exerted on the nut by a wrench is absorbed, interfering with the continuous tightening of the cone 06/28/2018, p. 10/29 xão. Applying additional torque in an attempt to overcome the jamming condition can merely damage the various components without improving the seal. These problems are not conducive to establishing an airtight seal.

In another form of the female part, represented in figure 2 of the prior art as 210, the inverted conical annular space 115 is supported by a ring or sleeve 222, which is fitted to the tube in a manner well known in the technology, against the outer surface of the inverted conical annular space. The ring includes support 225 orthogonal to the tube. The nut is modeled with the corresponding flange 221 as well as the threads 220. This shape is more resistant to jamming because the forces associated with the junction of the inverted conical annular space and the conical face are, in most cases, devoid of components other than axial components. Problematically, this form involves greater cost and complexity. In addition, this shape also produces a connection without elasticity or flexibility.

Discussion of each of these two forms can be found in the Society of Automotive Engineers SAE J514 REV. JUN1988 and J533 VER. AUG1996, both of which are incorporated by reference.

Both joints have significant disadvantages in both production and operation. First, these types of fittings have a tendency to loosen, escape and fail under certain conditions. When the female part is rotated in relation to the male part of the fitting, such as under the influence of impacts on the fitting or vibration, the friction between the part of 06/28/2018, p. 11/29 female and the nut can cause the nut to turn and loosen. This situation is predominantly related to fittings where the tube is curved as shown in figures 1 and 2 of the prior art, but it also applies when the tube is straight. It is believed that the lack of elasticity or flexibility of the connection exacerbates this tendency to loosen. Second, this tendency to loosen can cause an installer of the fitting to be encouraged to use additional torque in the fitting to overcome this deficiency, which can lead to failure of the various components, particularly the nut. As stated, the second of the two shapes (200) has the additional disadvantage of requiring that a separate sleeve (222) be produced and fitted to the tube, increasing the cost and complexity of producing the female part 210 of the extended cone fitting.

Thus, there is a continuous need for an extended cone fitting, including a female part, of simplified construction that has a greater resistance to leakage caused by the loosening caused by the rotation of the tube caused by too much torque applied to the nut.

SUMMARY

The present invention relates to systems and methods that employ an extended cone fitting, including a female part, of simplified construction that provides a greater resistance to leakage caused by the loosening caused by the rotation of the tube or caused by the excessive torque applied to the nut.

of 28/06/2018, p. 12/29

An object of the present invention is to provide an extended cone fit, including a female part, of simplified construction.

An additional objective of the present invention is to provide an enlarged cone fitting, including a female part, with greater resistance to leakage caused by the loosening caused by the rotation or vibration of the tube or over tightening of the connection.

For these purposes, modalities of the present invention are directed towards a better fit in an extended cone that includes a male part and a female part. The female part has a tube, an inverted tapered annular space, a nut and a joining part. Preferably, the joining part includes a back face of annular space that can define a void. The joint portion may also include a support designed to make contact with a flange of a fitting nut and to properly direct forces exerted on the nut.

More specifically, embodiments of the present invention can take the form of an enlarged cone fitting that includes a male part and a female part adapted to seal together with the male part, the female part preferably includes a tube defining a joining part. The joining part may comprise an inverted tapered annular space including a back face of annular space. The tube of various modalities has an internal diameter with an extended peripheral limit with a diameter corresponding to the internal diameter of the tube. The junction part may comprise from 28/06/2018, p. 13/29 additionally a void with a part that extends radially beyond the extended peripheral limit and axially inwards to the inverted conical annular space. Preferably, the void allows the female part to flex with respect to the male part without loosening a nut that joins the male part and the female part. For this purpose, the void can reduce the friction between the tube and the nut that joins the male part and the female part, whereby the reduction in friction reduces the loosening of the nut. Preferably, the junction part is integral, or unitary, and can comprise a support that extends substantially orthogonal from the tube. The nut that joins the male and the female parts can include an internal flange that makes orthogonal contact with the support.

The foregoing outlined in general the features and technical advantages of the present invention so that the detailed description of the invention that follows can be better understood. Additional features and advantages of the invention will be described hereinafter as the subject of the claims of the invention. It should be understood that the specific concept and modality disclosed can be readily used as a basis for modifying or designing other structures to accomplish the same purposes as the present invention. Also, it should be understood that such equivalent constructions do not deviate from the invention as presented in the appended claims. The unpublished features that are believed to be characteristic of the invention, both by their organization and by the method of operation, together with additional objectives and advantages will be better understood from the following of 06/28/2018, p. 14/29 description considered together with the attached figures. However, it should be expressly understood that each of the figures is provided for the purpose of illustration and description only and is not intended to be a definition of the limits of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The attached drawings, which are incorporated and form part of the specification in which like numbers designate like parts, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the invention. In the drawings:

Figure 1 is an elevated view with a quarter section showing the interior of a female end of the prior art of a hydraulic fitting;

Figure 2 is an elevated view with a quarter section showing the inside of a female end of the prior art hydraulic fitting;

Figure 3 is an elevated view with a sectional view showing the interior of a female end of a hydraulic fitting including an extended cone fitting embodiment according to the present invention;

Figures 4a through 4e are, in general, elevated cross-sectional views representing progressive formation of an extended cone fitting embodiment according to the present invention;

Figure 5 is of a forming press, as it can be used to form an embodiment of a female hydraulic fitting according to the present invention;

of 28/06/2018, p. 15/29

Figure 6 is, in general, an elevated cross sectional view of a forming press of Figure 6 including a tube to be formed in a female hydraulic fitting embodiment according to the present invention;

Figure 7 is an elevation of a first punch to be used in conjunction with the press of figures 5 and 6 to form an embodiment of a female hydraulic fitting according to the present invention;

Figure 8 is an elevation of a second punch to be used in conjunction with the press of figures 5 and 6 to form a female hydraulic fitting embodiment according to the present invention;

Figure 9 is an elevation of a third punch to be used in conjunction with the press of figures 5 and 6 to form a female hydraulic fitting embodiment according to the present invention; and

Figure 10 is an elevation of a fourth punch to be used in conjunction with the press of figures 5 and 6 to form a female hydraulic fitting embodiment in accordance with the present invention.

DETAILED DESCRIPTION

In relation to figure 3, a modality of the female part of the extended cone fitting 300 is shown. The female part of the extended cone fitting 300 includes joint part 310, tube 101, nut 302, hole 103 and hose rod 104. A hose rod 104 may include ferrule collar 106, hose stop 107 and fastening ribs 109. In general, junction part 310 is a part of fitting 300 adap 28/06/2018, pg. 16/29 designed to be substantially radially in nut 302. For the embodiment shown, the junction part 310 includes part of meat 328 and support or axial containment part 329 extending substantially orthogonally to tube 101, annular space inverted conical or conical face 315, empty 326 and posterior face of annular space 327.

Joining part 310 can be formed by various tube forming methods known in the art. However, an approach that is well suited to producing such parts, in which the parts are of the configuration of figure 3 and made based on volume, is by progressive mold formation. In relation to figures 4 to 10, those processes and tools that can be used to carry out the process are represented in general. However, the complete press technique and equipment are well known in the art and are not fully represented or described here. Specific types and details are described for producing junction part 310 of the extended cone fitting 300 of the present invention. The general configuration of the press can be as follows. The press can have six vertical rotating die stations, such as die 500, one of which is shown in Figure 5. Each die station contains interchangeable dies just like die 500. Each die has an integral ejection rod (not shown) ) that can be used to adjust the length of the part and to eject the finished part. The ejection rods can either be of fixed length or be adjusted to lengths with inserts. There can also be four battering rams (not represented on 06/28/2018, page 17/29 of them) with first up to four punches 700, 800, 900 and 1000 of figures 7 through 10, respectively, mounted on each ram. A self-lubricating sprayer (not shown) can also be attached to a charging station.

Each die 500 preferably includes top die 501, shape insert 502, top tube 504, compression tube 506, bottom die 508 and bottom tube 510. Each die is generally identical and it has replaceable components (ie, 502 insert of each matrix can be replaced). Upper matrix housing 501, upper pipe insert 504, compression pipe 506, lower matrix housing

508 and lower tube insert 510 are non-conforming areas of the matrix. These areas are dimensioned slightly larger than the tube 101 that is inserted. Tube 101 will expand to fill this oversized area during the forming process and will proportionally shorten. Notice in figure 6 how a little of the tube 101 extends beyond the insert 502.

In the first station, tube 101 is loaded into matrix 500. The next four stations can employ the first to fourth punches 700, 800, 900 and 1000, respectively, and may be able to apply twenty-five tons of force each. Each of stations one and two may have an extraction plate (not shown) for separating tube 101 from the respective punch 700 to 1000 after forming.

In operation, each pipe size is cut to length, burrs removed with wire brush, and from 06/28/2018, p. 18/29 washed to remove foreign metal particles, all before being introduced into the press. The press is prepared with the correct die size 500, first to four punches 700 to 1000, respectively, extractor plates (not shown), ejection rods (not shown) and loading rod (not shown) are assembled. A shuttle can be adjusted to the corresponding pipe size. A cut 101 tube with burrs removed (as shown in Figure 4A) is placed over matrix 500. A small amount of formation oil can be sprayed onto tube 101. Tube 101 is chilled in matrix 500 until the rod ejection discontinue travel. The loading rod retracts. The die 500 is rotated under the first punch 700. This is station two where the tube 101 is primarily expanded close to its opening as shown in Figure 4b. The cam part 328 is also produced in station two. The cam part 328 helps to properly position the nut 302 when the nut 302 is being prepared to thread on the male part (not shown). The cam part 328 has the convex curved shape shown in Figure 3, for this embodiment. However, other shapes such as the anklar shape represented in figures 4c through 4e, conical or concave curve are contemplated.

The first punch 700 advances until contact is made with a fixed stop. The first punch 700 retracts. The die 500 is rotated under the second punch 800. This is station three where the cam part 328 of the tube 101 is defined as shown in Figure 4c. The next puncture 800 of 06/28/2018, p. 19/29 advances until contact is made with a fixed stop. The second punch 800 retracts. The die 500 is rotated under the third punch 900. This is station four where the junction portion 310 of tube 101 is folded in the area expanded by station one up to 45 degrees as shown in figure 4d. The third punch 900 advances until its bottom touches the matrix 500. The third punch 900 retracts. The matrix 500 is rotated under the fourth punch 1000. This is station five that continues to bend and form inverted tapered annular space or tapered face 315. The inside diameter of the inverted tapered annular space or tapered face 315 is formed simultaneously.

The fourth punch 1000 advances until its bottom touches the matrix 500. The fourth punch 1000 retracts. The matrix 500 is rotated on an ejection cylinder (not shown). This is the final station where tube 101 is ejected. The ejection cylinder advances, advancing an ejection rod and part formed until a signal is received. The formed part is now outside the matrix 500 and exposed. A separation (not shown) is activated by separating the exposed formed part. The ejection cylinder retracts. The matrix is rotated under the charging station.

The exposed operation is listed for a matrix station. All six matrix stations are in a circle and, as each matrix station is rotated, all other stations rotate simultaneously. The four punches 700 to 1000, respectively, advance simultaneously in the four die stations while the loading and ejection are also being simultaneously friendship 06/28/2018, p. 20/29 of. Each punch 700 through 1000, respectively, has a separate configuration and has replaceable components in critical forming areas of the punch that makes contact with the tube 101 during the forming process.

The hose rod 104 can be formed over tube 101 at the opposite end of the inverted tapered annular space or tapered face 315. Tube 101 can be metallized. Nut 302 can be placed around tube 101. Tube 101 can be curved. Finally, the ferrule collar 106 can be attached in place.

Commonly, hose rod 104 is inserted into the open end of a flexible hose (not shown) and a ferrule (not shown) is bent around that hose end as well as ferrule collar 106 to secure fitting 300 to the hose. For these applications that do not involve attachment to a flexible hose (not shown), hose stem 104 can be omitted. In a case like this, the pipe 101 can extend the distance that would otherwise be contemplated by the flexible hose.

Note that producing the joining portion 310 of the present invention does not include creating and securing a separate reinforcement ring or sleeve, such as the sleeve 222 of Figure 2, thereby reducing cost and complexity.

However, more significantly, void 326 is preferably created. The void 326 is on the volume between the extended peripheral limit A (figures 4A-4E), the internal surface of the junction part 310 and axially intervenes 06/28/2018, p. 21/29 or to the posterior face of the annular space 327. The extended peripheral limit A is that conceptual surface that extends linearly from the part of the tube 101 that has not been altered either by the formation of the junction part 310 nor by the curvature of the tube 101. In order to extend radially beyond, the extended peripheral limit A must be of a larger radius.

The void 326 alters the response of nut 302 when the female part of the extended cone fitting 300 rotates with respect to the male part of the fitting. When the female part 100 or 200 of figures 1 or 2 are gripped to rotate the female part 100 or 200 with respect to the male part or the vibrated nut 102 or 202 tends to detach from the male part. If the loosening progresses sufficiently, the fit may escape. Thus, the connection experiences a failure. The emptiness 326 decreases this tendency to loosen. The void 326 may allow for some elasticity or flexion in the joint which, in turn, reduces the friction between the pipe 101 and the nut 302 under such conditions. The reduction of friction reduces the tendency of nut 302 to loosen under the conditions described.

The inverted tapered annular space 315 of the present invention is accompanied by the rear face of annular space 327 defining the void 326. Additionally, the nut 302 can define the inner flange 323 that acts against the support 329 of the junction part 310. Better direction of the forces caused by the orthogonality of the support 329 and flange 23 together with the reduction of friction caused by the void 326 can result in unique resistance to leakage and failure by the joints employed in the present invention. Additionally, from 06/28/2018, p. 22/29 the sticking of nut 302 on the outer surface of the inverted conical annular space 315, similar to that found in the prior art, can be avoided.

The present invention provides an extended cone fitting which is, at the same time, less expensive and complex to produce; it exhibits greater resistance to loosening in its work environment due to blows, vibration or other events that can cause the rotation of the fitting and, ultimately, the leakage and the failure of the fitting; and exhibits greater resistance to failure caused by jamming during nut tightening.

Although the present invention and its advantages have been described in detail, it is to be understood that various changes, substitutions and alterations can be made here without departing from the invention as defined by the appended claims. Furthermore, it is not intended that the scope of the present application be limited to the particular modalities of the process, machine, fabrication, material composition, devices, methods and steps described in the specification. As can be easily perceived from the disclosure, processes, machines, manufacturing, compositions of matter, devices, methods or steps currently existing or still to be developed that perform substantially the same function or achieve substantially the same result as the corresponding modalities here described can be used. Thus, it is intended that the attached claims include in its scope such processes, machines, manufacture 06/28/2018, p. 23/29 tion, material compositions, devices, methods or stages.

Petition 870180055899, of 06/28/2018, p. 24/29

Claims (14)

1. Female part of the extended cone fitting (300), comprising a tube (101) with an internal diameter, an extended peripheral limit (A) with a diameter corresponding to said internal diameter, a unitary junction part (310) comprising an inverted tapered annular space (315) including a posterior face of annular space (327) and a void (326) with a part extending radially beyond said extended peripheral limit (A), wherein said part is axially at direction of the interior of said tube in relation to the inverted conical annular space (315), FEATURED by the fact that said joining part (310) additionally comprises a support (329) orthogonal to said tube (101). 2. Female part of the enlarged cone fitting, according to claim 1, CHARACTERIZED by the fact that said joining part (310) has a constant outer diameter axially external to said support (329). 3. Female part of the enlarged cone fitting, according to claim 1 or 2, CHARACTERIZED by the fact that said junction part (310) defines the posterior face of the annular space (327), said posterior face of the annular space (327) defining at least a part of said void (326). 4. Female part of the extended cone fitting (300), according to claim 1, CHARACTERIZED by the fact that a nut (302) joins said female part (300) and a male part of said extended cone fitting, defining a border of 06/28/2018, p. 25/29 internal (323) which makes orthogonal contact with said support (329). 5. Female part of the extended cone fitting (300) according to any of the preceding claims, 5 CHARACTERIZED by the fact that said void (326) allows said female part (300) to flex with respect to a male fitting part in which said female part (300) is sealably secured without loosening the nut (302 ) which joins said male part and said female part (300). 10 6. Female part of the extended cone fitting (300), according to any of the preceding claims, CHARACTERIZED by the fact that said void (326) reduces the friction between said tube (101) and the nut (302) that joins said female part (300) with the male part of said socket in 15 extended cone. 7. Female part of the enlarged cone fitting (300), according to claim 6, CHARACTERIZED by the fact that said reduction in friction reduces the loosening of said nut (302). 20 8. Female part of the enlarged cone fitting (300), according to claim 7, CHARACTERIZED by the fact that said internal flange (323) that makes contact in an orthogonal way with said support (329) holds said female part (300) in said male part. 25 9. Method for producing a female part (300) of an extended cone fitting, as defined in claims 1 to 8, CHARACTERIZED by the fact that it comprises the steps of: Petition 870180055899, of 06/28/2018, p. 26/29 providing a tube (101); cutting said tube (101) to length; reshaping said tube (101) to include an inverted tapered annular space (315); and 5 reshaping said tube (101) to include an axial retaining part. 10. Method, according to claim 9, CHARACTERIZED by the fact that said axial containment part extends orthogonally to said tube 10 (101). 11. Method, according to claim 9 or 10, CHARACTERIZED by the fact that it additionally comprises: reshaping said tube (101) to include a void (326) with a portion extending radially beyond a 15 extended peripheral limit (A) of said tube (101) and axially into said inverted conical annular space (315). 12. Method, according to claim 9, CHARACTERIZED by the fact that a posterior face of the space 20 annular (327) defines at least a part of said void (326). 13. Method according to any of claims 9 to 12, CHARACTERIZED by the fact that said inverted conical annular space (315) and said containment part Axial 25 comprise an integral joining part of said female part (310) of an enlarged cone fitting (300). Petition 870180055899, of 06/28/2018, p. 27/29 14. Method according to any one of claims 9 to 13, CHARACTERIZED by the fact that it additionally comprises: placing said tube (101) on a matrix; 5 puncturing to remodel said tube (101) until said inverted conical annular space (315) is formed; and punching to reshape said tube (101) until said axial retaining part is formed. Petition 870180055899, of 06/28/2018, p. 28/29 dy