MXPA00010351A - Crimped swivel fitting and method of attachment of the fitting to a hose - Google Patents

Abstract

An improved crimped swivel fitting (10) for a gasoline hose (11) is disclosed. The fitting is a three-piece assembly (10). A male stem (30) is provided with a shoulder (39) at one external end (31A) and a series of barbs (35) at the opposing end (31B). A swivel nut (50) with an external threading, is slid over the stem barbs (35) and abuts directly against the shoulder (39). The barbed stem end (31B) is inserted into a hose (11) to which a ferrule (60) with internal notching (64) has already been attached. An internal shoulder (63) of the ferrule (60) rests in a groove (33) on the stem (30) and directly abuts against a shoulder (55) of the swivel nut (50). The ferrule (60) is crimped onto the stem (30), thereby securing the fitting to the hose, and locking the swivel nut (50) onto the assembly (10).

Description

INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERA? ON TREATY (PCT) F16L 33/207 fe FOLDED HEADSET ACCESSORY AND CONNECTION METHOD Field and Background of the Invention This invention relates to a ball fitting for a hose, preferably for a gasoline hose. More particularly, the invention relates to a ball fitting permanently fixed to a hose. Hose fittings and in particular ball joint accessories are known and used for many years. These accessories are connected to the end of a hose for the additional conduction of a liquid or gas. The conventional swivel or ball joint fittings used in gasoline hoses are collectible, allowing the removal of the gas hose or nozzle and reinstallation and connection of different ball-and-socket nuts and various connections in the field by any technician or non-skilled person. The ball fittings of the prior art work with a ball-and-socket nut attached to a rod piece by means of a retaining ring. The partial assembled fixture, with the retaining ring and ball nut at the opposite end, are inserted into a hose on which a bushing or metal lining has already been provided. The bushing is attached to the rod, connecting the hose to the ball fitting. By The retainer ring can be removed and reinstalled in the field, which can consist of safety considerations if the fitting is not reinstalled correctly. In practice, the retaining ring is frequently damaged and can be removed. detach while in service, resulting in a serious safety problem US Patent No. 4,804,212 discloses a three-piece ball joint, consisting of a nipple to be inserted into the end of a length of hose and attached to the hose by a folded plug around the end of nipple and hose The ball nut, with internal threading to provide direct metal-to-metal contact with the nipple for fluid transfer purposes, is inserted into the opposite end of the nipple before insertion into the hose and folding The described accessory is folded over the hose structure, in such a way that it forms flat parts to hold on the key in the plug, in correspondence with the flat parts for fastening with the key in the ball nut The flat parts for fastening with the key both in the plug and the ball nut, allow the operator to replace accessories without twisting the hose by providing a means to retain the opposite ends with keys COMPENDIUM OF THE INVENTION The invention described is an externally folded gasoline hose coupling fitting, and a method for providing a ball-and-socket joint folded into a hose. The fitting is a three-piece structure. The first piece is a rod with a shoulder at an outer end and a series of hose tines on the opposite end A ball nut slides over the hose shanks of the rod and retains in the stem through the shoulder The barbed end of the rod is inserted into a hose to which a hose has already been connected. bushing with internal notches An internal shoulder in the bushing rests on a groove in the stem and the bushing is folded over the rod, thus holding the fitting in the hose The ball-and-socket nut is retained in the rod by the shoulder stem and the folded bushing The ball nut is provided with external threads that allow connection of a female accessory gas nozzle The ball nut in the hose fitting it freely rotates 360 ° relative to the rod, allowing any connected nozzle or additional hose connection to freely rotate around the hose. The bushing has a smooth external circumferential exterior. At one axial end of the bushing is a shoulder that extends radially inward, of one dimension to rest on a groove in the rod Axially inward of the shoulder is a series of internal notches The internal notch couples the hose and the barbs of the rod to hold the hose during folding Advantages of the invention are cost reductions for the fixture, reduced safety problems associated with known knuckle fixtures and improved force against detachment of the fixture Brief Description of Drawings The invention will be better understood from the following detailed description taken in conjunction with the accompanying drawings of drawings in which Figure 1 illustrates a conventional four-piece ball fitting connected to a hose, Figures 2A and 2B illustrate the rod of the invention described, wherein Figure 2A illustrates the external construction and Figure B illustrates the internal construction Figure 3 illustrates the nut Figure 4 illustrates the cap of the present invention, Figure 5 illustrates a folded ball fitting according to the invention, mounted on a hose and nozzle for gasoline. Detailed Description of the Drawings Figure 1 shows a conventional four-piece ball joint 100, for use with a hose and nozzle Gasoline The rod 101 has a dual male configuration with a set of flat parts for key 10 formed in the middle between the opposite ends. An axial end is provided with a series of flanges 103 for coupling with a hose. The opposite end is provided with a series of slots 104 for laying of toned rings 105 to provide a gasoline-impermeable seal with the ball-and-socket nut 110 The ball-and-socket nut 110 slides on the stem 101 with the flat parts for clamping with the key 112 of the ball-and-socket nut 110 , butt confining the flat parts to be held with the key 102 of the rod 101 The retaining ring 120 is then connected to the rod outermost nura 106 of the rod 101, holding the ball nut 110 in the rod 101 The rod 101 is then inserted into a hose and is already provided with a bushing 130 The outer circumference of the bushing 130 has flat parts for holding with the key 132 The end of the bushing 130 is butted against the s flat parts for holding with the key 102 of the rod 101 and holding the rod 101 While in use, the retaining ring 120 can be detached and the ball nut 110 removed and replaced as well as reinstalled. Figure 2B illustrates the internal structure of the stem 30 of the invention described in more detail. The rod 30 is a tubular unit with an internal configuration of smooth stepped diameter. The internal bore of the rod 30 is constituted by two diameters. The first diameter DI is 80 to 115% of the second diameter D2 of the hole or inner bore. The two diameters are connected by an angled taper 32 of the bore. The angle, a, with respect to the axial center line of the rod is within the range of 15 ° to 50 °. For a person of ordinary skill in the art, it is recognized that the angle a is a function of the difference in the orifice diameters and the length of the connecting taper. In the preferred embodiment of the invention described, the angle a is 45 °. As seen in Figure 2A, the outer circumference of the rod 30 is constituted by a slot 33 and shoulder 34. The shoulder 34 has a diameter D3 smaller than the diameter D4 of the internal shoulder 63 in the cap of the invention 60, so such that the shoulder 63 passes over the shoulder 34 and is supported or adjusted in the groove 33. The width of the slot 33 is greater than the axial width of the internal sleeve shoulder 63. Alternately, the rod 30, radially outwardly of the inner connecting taper 33, can be defined by a series of shoulders and grooves to provide length rods different. In this alternative, the cap shoulder as previously discussed rests on the first innermost groove of the rod. Axially spaced from the shoulder 34 is a series of inclined tines 35 for coupling with the hose 11. The tines 35 at the radially outermost point have a diameter D5 equal to or less than the diameter 3 of the adjacent shoulder 34. In a preferred embodiment, the tines 35 have a larger or larger diameter D5 equivalent to the diameter D3 of the shoulder 34. The tines 35 each have an axially inclined wall exterior to the axial direction of the rod 30, at an angle μ of 5 ° to 15 °. The rod 30 is preferably provided with three to seven barbs 35, the number of barbs 35 depending on the length of the rod. In the preferred embodiment, the rod 30 has five prongs 35. The structure of each prong 35 is such that as the bushing 60 slides on the rod end 30, with the hose 11 between them, the bushing 60 and the rod 30, the tines 35 couple the cap shoulder 63.

As force is applied to the bushing 60 to move the bushing 60 axially inwardly to the slot 33, the tines 35 hold the hose 11 between the bushing 60 and the rod 30 The right hand end axially more external 36 of the rod 30 has a diameter D6, smaller than the shoulder diameter of bushing D4. The stem edge 37 may be chamfered to assist in inserting the rod 30 into the hose 11. The chamfering of the rod edges 37 reduces the internal cost of the hose 11 when the structure 10 is prepared The chamfering edge 37 has a radius of about .0762 cm (0.03 inch) with a center of curvature within the rod 30. The left-hand side of the stem 31A is defined by a series of grooves 38 and an axially outermost shoulder end 39 The diameter D7 of the The left hand portion of the rod 30 is less than the inner diameter D8 of the ball nut 50. The grooves 38 in the rod are for the placement of gasoline impermeable toned rings 40 The two toned rings 40 can be of identical properties or can differ depending on the fluid desired to be transported. The diameter D9 of the axially outermost shoulder end 39 is larger than the inner diameter D8 of the ball nut 50.

Similar to the left hand edge of the shank 37, the right hand edge of the shank 41 may be chamfered. In the preferred embodiment, the chamfered edge 41 has a radius of approximately .1016 cm (0.04 inch) with a center of curvature within the rod 30. Figure 3 illustrates the tubular ball nut 50 in greater detail. The internal bore 51 of the ball nut 50 is a smooth circumference. As apparent from Figure 2, for engagement with the rod 30, the inner diameter D8 of the nut 50 is less than the outer diameter D9 of the axially outermost shoulder end 39 of the rod 30, such that the ball nut 50 is retained on the rod 30 by sliding the ball nut 50 onto the right hand side of the rod 31B. An axial end of the ball nut 50 is provided with conventional external thread 52. The external thread 52 is for direct coupling with a gasoline nozzle or other conventional female threaded conduit. Flat parts for fastening with the key 53 are placed on the opposite end of the ball nut 50, and in the final assembly of the ball fitting 10, it provides the only set of flat parts for fastening with the key. In the preferred embodiment, the axially outer edges of the flat portions for fastening with the key 54 can be beveled at an angle of about 20 ° to a radial line of the ball nut 50. Axially outward of the flat parts to be held with the key 53 is a shoulder 55 with a diameter DIO greater than the shoulder diameter of inner bushing D4 . Figure 4 illustrates the tubular bushing 60 in greater detail. The outer circumference of the bushing 61 is a substantially circular circumference. The inner bore 62 of the bushing is defined by a shoulder 63 and a series of notches 64. The diameter D4 of the inner shoulder 63 is larger than the outer diameter D3 of the groove 33 of the rod 30 with which the bushing 60 is finally in engagement after folding of the structure 10. The notches 64 extend along the length of the bushing 60. The bushing 60 is preferably provided with 5 to 10 notches, the number of notches 64 depends on the bushing length. In the preferred embodiment, the bushing 60 has eight notches 64. By providing a hose 11, with a folded ball-and-socket accessory 10 according to the invention described, the following steps are employed, see also Figure 5. The ball-and-socket nut 50 it slides on the barbed end of the rod 31B, with the threads 52 directed towards the axially outermost shoulder 39 of the rod 30. The nut The ball socket 50 is pushed over the toner rings 40 until the ball nut is directly against the rod shoulder 39 The bushing 60 is placed on the end of the hose 11 with the inner shoulder 63 facing the terminal end of the hose. end with barbed shank 31B, with the ball nut connected 50 at the opposite rod end 31A, then inserted into the hose 11 After placing the rod 30 in the hose 11, the inner sleeve shoulder 63 is placed inside the slot 33 of the rod 30 and the outer wall of the cap shoulder 63 directly abuts the shoulder 55 of the ball nut 50 After the bushing 50 and the hose 11 have been properly positioned in the rod, the bushing is folded over the hose and the rod by conventional means known to those of ordinary skill in the art The folding of the bushing may result in slight deformation of the smooth circular configuration of the outer circumference of the bushing After folding, the ball nut 50 is clamped on the stem between the shoulder Axially outer rod 39 and the bushing 60 After folding, without a complete removal of the folded bushing 60, the ball-and-socket nut 50 can not be removed. e of the stem 30 After folding, the accessories and fuel nozzles can be connected to the ball nut 50 The secure connection of the ball nut 50 allows a fuel nozzle to rotate 360 ° around the hose without causing the hose to twist or tangle. , the fitting 10 can be designed for installation in all sizes of gasoline hose 11 The method of locking the ball nut 50 onto the rod 30 without the use of a retaining ring 120 can also be used in many other types of known hoses and The shank 30, the ball nut 50 and bushing 60 of this fitting can be made of various known and conventional materials whether coated or uncoated, such as brass, zinc, aluminum and steel. The selection of the particular material for each piece is based on the desired use of the structure In the preferred form, the rod 30 is chromed brass, the ball nut 50 is made of zinc without and the cap 60 is uncoated aluminum The structure of the invention 10 has several advantages over conventional folded ball joint accessories 100 The folded ball-and-socket structure 10 does not allow removal and reinstallation of the ball nut 50, eliminating any safety considerations due Damage to Conventional Retaining Rings 120 Folded structure 10 has better retention of the attachment than conventional folded patella accessories 100 Folded structure 10 also has superior coupling tensile strength and improved bending life Structure 10 also it is lower in cost and safer to assemble and use These and other objects, features and advantages of the present invention will be well appreciated when reading the present description of the invention, when taken in conjunction with the accompanying drawings, it being understood that some modifications, variations and changes can easily be made by those skilled in the art to which the invention relates without departing from the spirit of the invention or the scope of an appended claim.

Claims (12)

1. CLAIMS 1 A method for fastening a ball fitting structure with a hose end, characterized in that it comprises the steps of providing a ball nut, a rod, and a bushing, wherein the rod is constituted by a slot in a section half of the rod and one shoulder in a first axial end, the ball nut is constituted by a threads and a set of flat parts to hold with the key and the bushing is constituted by a shoulder that extends internally, insert the rod on the ball nut, place the ball nut on the first axial end of the rod, place the bushing on one end of the hose, insert a second axial end of the stem into the hose, align the inner shoulder of the bushing on the groove of the rod and fold the bushing on the rod to hold the bushing and hose on the rod, the method of fastening the structure is characterized by inserting the The stem on the ball-and-socket joint nut is shaped so that the screw threads of the ball-and-socket joint screw butt directly against the shoulder of the first axial end of the rod and the flat parts to be clamped with the ball nut wrench. place approximately in the middle position of the rod and the ball nut does not extend beyond the length axial of the rod and the folding of the bush holds the ball nut on the rod between them the shoulder of a first axial end of the rod and the bushing.
2. The method for securing a ball fitting structure with a hose end according to claim 1, characterized in that the outer circumference of the bushing is substantially cylindrical and the step of folding the bushing does not substantially change the outer configuration of the bushing.
3. 3. The method for fastening a ball fitting structure with a hose end according to claim 1, characterized in that the second axial end of the rod is constituted by a barbed string. The method for fastening a ball fitting structure with a hose end according to claim 3, characterized in that the rod has 3 to 7 barbs. The method for fastening a ball fitting structure with a hose end according to claim 1, characterized in that the ball nut is constituted by a shoulder adjacent to the flat parts for fastening with the key and the opposite end of the ball nut of the series of threads. The method for attaching a ball fitting structure with a hose end according to claim 1, characterized in that it further comprises the step of connecting a gasoline nozzle to the ball nut after the bushing has been folded over the hose. 7 A folding ball joint structure of a hose for liquid or gas, comprising a ball nut, a rod, a bushing, wherein the rod is constituted by a groove in a middle section of the rod and a shoulder in a first axial end, the ball nut is constituted by a series of threads and a set of flat parts to hold with the key, the bushing is constituted by a shoulder that extends internally, where the rod is inserted into the ball nut, the ball nut is placed on the first axial end of the rod, the bushing is placed on a terminal end of the hose, a second axial end of the rod is inserted in the hose, the inner shoulder of the bushing is aligned on the slot of the rod. rod and the bushing is folded over the rod to hold the bushing and the hose on the rod, the structure is characterized by. the rod is inserted into the nut of ball joint so that the threads of the ball-and-socket joint screw butt directly against the shoulder of a first axial end of the rod and the flat parts for clag with the ball-end wrench are placed approximately in the length position half of the rod and the ball-and-socket nut does not extend beyond the axial length of the rod and the folded bushing holds the ball-and-socket nut on the rod between the shoulder at the first axial end of the rod and the bushing. Folding kneecap according to claim 7, characterized in that the outer circumference of the bushing is substantially cylindrical and after folding the bushing retains a substantially cylindrical configuration 9 The structure of folded ball-and-socket accessories according to claim 7, characterized in that the second axial end of the rod is constituted by a series 10 The structure of folded ball-and-socket accessories according to claim 9, characterized in that the rod has three to seven barbs 11 The structure of folded ball-and-socket accessories according to claim 7, characterized in that the ball-and-socket nut is constituted by a shoulder adjacent to the flat parts for fastening with the wrench and at the opposite end of the ball nut of the series of threads. The folded ball-and-socket accessory structure according to claim 7, characterized in that a petrol nozzle is connected to the ball-and-socket nut after the bushing has been folded over the hose.