FR2522388A1 - CONNECTOR FOR CONNECTING FLEXIBLE TUBES OF DIAMETER NOTABLY DIFFERENT - Google Patents

Abstract

THE PRESENT INVENTION CONCERNS A FITTING FOR THE CONNECTION OF FLEXIBLE TUBES OF SIGNIFICANTLY DIFFERENT DIAMETER. CONNECTION CHARACTERIZED IN THAT BETWEEN THE RUBBER-HOLDER SHAFT 3 AND THE CLAMPING RING IS PLACED A GROUP OF AT LEAST TWO ELASTIC RINGS 8, 9, A FIRST ELASTIC RING 8 BEING LOCATED IN THE WIDENED PART OF THE RUBBER-HOLDER TAIL 3 AND BUTTING THROUGH ITS REAR END AGAINST THE MAIN BODY 1 OF THE FITTING AND A SECOND ELASTIC RING 9 BEING THEN ARRANGED AT THE LOCATION OF THE TAPED PART OF THE RUBBER-HOLDER TAIL 3 AND BUTTING THROUGH ITS END '' ANTERIOR END OF THE FIRST ELASTIC RING 8, THESE ELASTIC RINGS 8, 9 BEING, IN ADDITION, INTERNALLY SHIMMED, PREFERABLY NEAR THEIR ANTERIOR ENDS, OF THE RAISED PARTS FORMING LAMPS 14 AND 15 DESIGNED TO APPLY AGAINST THEM 16, 17 TO BE FIXED.

Description

The invention relates to a coupling which allows the connection of flexible tubes

having diameters and

  significantly different thicknesses.

  Various types of connectors for connecting flexible tubes are known from those formed by

  a simple tubular tail tapered externally,

  also in some cases annular reliefs

  properties on which one can thread the end of the flexible tube to be connected which is thus fixed only by pressure, to the more advanced connections comprising various locking means, adapted to fix the end of the flexible tube by squeezing it on a tail

  rigid tubular on which it is put beforehand.

  A particular connector of this type is described in

  IT patent 870 733 of the applicant.

  This connection, besides allowing a blocking str of the end of the flexible tube, also makes it possible to obtain the connection of tubes having substantially different diameters and thicknesses. However, the maximum difference ratio that can be obtained is In fact, in the practical realization of this connection, the difference between the minimum inside diameter and the

  maximum inside diameter of the applicable tube is only

  approximately 30%, from the minimum diameter of 13 mm to the maximum diameter of 17 to 18 mm, which corresponds only to the possibility of using two

  spilled tubes and known in the trade.

  On the contrary, it would be significantly advantageous and advantageous to be able to have a connector that allows a greater variation in the dimensions of the tubes that can be connected, while avoiding the drawback of excessive shrinkage of the larger diameter tubes. indeed, a more rational and practical use, with the advantages,

  including economic and commercial, which result.

  This fundamental goal is achieved by fitting

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  according to the invention, basically constituted by a main body formed essentially of a hollow cylindrical body which coaxially extends a rubber-shaped tail formed of an externally conical tubular body and provided with annular serrations on which flexible tubes of various types can be applied. diameters and a clamping ring engaging at one end by a threaded portion on a corresponding threaded portion formed on the main body, the other end being internally provided with an annular relief developing at its inner portion a converging conical surface outwardly, adapted to engage the free ends of resilient tongues formed on a corresponding resilient ring, to press them inwardly against the applied flexible pipe section, all being substantially similar to the connector according to the cited patent higher, and characterized by the fact that between the tail rubber-holder and the clamping ring is placed a group of at least two elastic rings, a first elastic ring being arranged at the location of the enlarged part of the rubber-carrying tail and abutting by its

  posterior end against the main body of the

  cord and a second elastic ring being then disposed at the location of the narrowed portion of the tail-rubber and abutting by its inner end

  against the anterior end of the first elastic ring

  these elastic rings being additionally provided with

  internally, preferably close to their

  earlier, of raised parts forming

  telures designed to be applied against the tube to be fixed, the screwing of the clamping ring on the main body having the effect of causing, when the connection is complete and provided with the two elastic rings, the tightening of the second elastic ring to the place of the part of the rubber tail that presents smaller

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  diameters, causing the fixing of a first dimensional range of flexible tubes having diameters

  reduced, the exclusion of the second elastic ring

  putting, on the other hand, the tightening of the first elastic ring only and consequently the fixing of a second dimensional range of flexible tubes of larger diameters, the inner part of the second elastic ring, which is applied against the tube to be fixed , having a diameter smaller than that of the first

  elastic ring, the tapered tail rubber holder pre-

  finally feeling a wide variety of diameters allowing the application of flexible tubes of substantially different diameters, a first section included in the second elastic ring being suitable for fixing a first dimensional range of flexible tubes and a second section included in the first elastic ring being suitable for fixing a second range of tubes

flexible of larger size.

  This will be described in more detail below in

  a preferential mode of

  BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows in longitudinal section the connection in question connected to a tube of minimum diameter;

  Figure 2 shows, also in longitudinal section, the same

  me connected to a tube of maximum diameter, and Figure 3 shows in detail, exploded perspective,

  the constituent elements of this connection.

  In the figures, the various common details are denoted by the same references. The only different elements are respectively the tube of maximum diameter applicable on the connection and designated by 16 in FIG. 2 and that of the minimum diameter designated by 17 in FIG. therefore show these figures, the connection according to the invention comprises: a main body 1 form

  essentially of a hollow cylindrical body whose ex-

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  tremité is externally provided with a threaded portion 2 and from which coaxially a rubber tail 3 formed of an externally conical tubular body converging taper towards its free end and provided with appropriate annular reliefs; a clamping ring 4 formed of a substantially cylindrical rigid body provided with

  internally with a threaded portion 5 designed to engage

  on the corresponding threaded part 2 of the main body

  cipal 1 and developing from one end to

  inside and at the other end of the

  mity, an annular relief 6 developing internally

  an inclined surface 7 with convergent taper towards the ex-

  TER AL; a first elastic ring 8 and a second elastic ring 9 These two elastic rings 8 and 9

  have respectively several longitudinal notches

  tudinal 10 and 11 developing from their

  up to near their posterior end.

  These longitudinal cuts 10 and 11 generate on each elastic ring 8 and 9 several elastic tabs, respectively 12 and 13, whose free ends will be shaped so as to develop internally properly shaped raised portions constituting

  serrations, respectively 14 and 15, designed to meet

  as described below, on respective parts

  of flexible tube to cause attachment to the fitting.

  The first elastic ring 8 will have dimensions such that the tops of its serrations 14 are arranged on a diameter equivalent to the outer diameter of the maximum flexible tube 16 applicable to the fitting, while the tops of the serrations 15 of the second elastic ring 9 will be arranged on a diameter less than the previous one and which will in any case be at least slightly greater than the maximum outside diameter of the tube 17 of the minimum applicable range. The posterior end of the first elastic ring 8 will bear against the body

  principal 1, while that of the second elastic ring

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  tick 9 will abut against the anterior ends of

  resilient tongues 12 of the first elastic ring 8.

  Operation is as simple as possible.

  The seal being complete and thus comprising the two elastic rings 8 and 9 (see FIG. 1), it will be possible to apply

  connect to the connection a first range of tubes of

  dimensions, from a minimum dimension

  having an inside diameter equal to the minimum outer diameter of the tapered rubber tine 3, to a maximum dimension having an inside diameter approximately equivalent to the average outside diameter of the

rubber tail 3.

  The application will be carried out simply by threading

  the end of the flexible tube 17 to be connected in the end

  Connecting the coupling The end of the tube 17 will penetrate into the fitting by engaging at its inner portion on a portion of the free end of the shank 3, while its outer portion will slide inside the tops of the serrations. 15 If this part

  outside had a diameter even slightly higher than

  which is defined by the summits of the dente-

  lures 15, the tube 17 could also be threaded into the fitting because the outer edge of the insert end would slide on the inclined and converging surface

  towards the outside of the serrations 15, pushing towards the ex-

  the free ends of the respective resilient tongues 13 Obviously, in this case, the ring of

  tightening 4 must be properly unscrewed in order to

  to prevent the free ends of the elastic tongues 13 from being applied against the inclined surface 7 of the relief

  ring 6 and are thus blocked.

  Once the flexible tube has been inserted on the coupling as described above, to obtain its locking on it, it will be sufficient to screw the clamping ring 4

  on the main body 1, so that the inclined surface

  born 7 of the annular relief 6 will gradually grow

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  inwardly the ends of the resilient tongues 13 of the second elastic ring 9 only, so that the respective serrations 15 will be applied on the outer surface of the flexible tube 17, clamping it against the tail 3 and thus fixing it to the connection in a way

safe and reliable.

  If the tube to be connected has sufficient diameters

  to those who make it possible to insert it into the

  cord as described above, it will suffice to

  completely tighten the clamping ring 4 and remove the second elastic ring 9 Then tighten the clamping ring 4 on the main body 1 until its annular relief 6 is close to the free ends

  resilient tongues 12 of the first elastic ring

  In this case, it will be possible to thread and fix on the coupling another range of flexible tubes having larger diameters than those which can

  be fixed on the complete fitting Obviously, the applica-

  fastening will be carried out in the manner described

  previously for the first range of tube sizes.

  Figure 2 clearly illustrates the application of a tube having diameters included in the second range. What has been shown shows that the connection

  the invention makes it possible to obtain, with a single type of connection,

  cord, the possibility of connecting flexible tubes pre-

  with significantly different diameters and practically

  The possibility of at least twice as much dimensional variation of the tubes as is possible with a single elastic ring. It should also be pointed out that the attachment of the tubes to the fitting described is as safe and as reliable as possible,

  whether hydraulic or mechanical sealing.

  Incidentally, it may be noted that any requests for the removal of the tube have

  the effect that this one, being hung by the dente-

  14 or 15 of the respective elastic rings 8 or 9, causes a tightening always stronger, since the elastic ring 8 or 9 for clamping will be pushed longitudinally outwardly so that the free ends of its elastic tongues 12 or 13

  applying against the inclined surface 7 of the

  6 of the clamping ring 4, will be pushed further

  inwards, increasing the tightening of

  so that the withdrawal of the tube 16 or 17 is surely prevented.

  It is understandable that it is possible to increase

  the scale of the dimensional ranges of

  the connection, increasing the number of elastic rings

  and, therefore, by varying the length and the maximum and minimum diameters of the rubber-bearing shank appropriately and taking into account this increase. Obviously, the connection according to the invention may, moreover, be executed with dimensions various and

  various materials to be adapted to the needs of applica-

  the most varied finally, to the preferred solution presented, we can make all the changes that are within the reach of an average technician, without otherwise

depart from the scope of the invention.

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Claims (3)

R E V E N D I C A T IO N S   1 Connection for the connection of flexible tubes   significantly different in diameter, basically   a main body (1) formed essentially of a hollow cylindrical body from which coaxially a rubber-bearing tail (3) formed of an externally conical tubular body and provided with annular serrations on which flexible tubes can be applied (16). , 17) of various diameters and a clamping ring (4) engaging at one end by a threaded portion (5) on a corresponding threaded portion (2) formed on the main body (1), the other end being internally provided with an annular relief (6) developing at its inner part an outwardly convergent conical surface (7) adapted to engage the free ends of resilient tongues formed on a corresponding elastic ring, to tighten them inwardly against the section of flexible tube applied, a connection substantially similar to that according to patent IT 870 733 and characterized in that between the rubber-carrying tail (3) and the clamping ring is placed a group of at least   two elastic rings (8, 9), a first elastic ring   tick (8) being disposed at the location of the enlarged portion   rubber tail (3) and abutting by its end.   posterior miter against the main body (1) of the fitting   and a second elastic ring (9) being arranged   following the location of the narrowed part of the tail   rubber carrier (3) and abutting by its end   against the anterior end of the first elastic ring (8), these elastic rings (8, 9) being,   in addition, provided internally, preferably close to   from their anterior extremities, of parts   grooves (14 and 15) designed to be applied against the tube (16, 17) to be fixed, the tightening of the clamping ring (4) on the main body (1) having the effect of causing, when the fitting is 2-522388   complete and provided with the two elastic rings (8, 9), the tightening of the second elastic ring (9) at the location of the part of the tailgate rubber (3), which has smaller diameters, causing the fixation of a first dimensional range of flexible tubes having reduced diameters, the exclusion of the second elastic ring (9) allowing, on the other hand, the clamping of the first elastic ring (8) only and consequently the fixing of a second dimensional range of flexible tubes of larger diameters, the inner part of the second elastic ring (9), which is applied against the tube to be fixed, having a smaller diameter than the   of the first elastic ring, the conical tail carries   finally showing a wide variety of diameters   very allowing the application of flexible tubes of significantly different diameters, a first section included in the second elastic ring (9) being suitable for fixing a first dimensional range of flexible tubes (17)   and a second section included in the first elastic ring   tick (8) being suitable for fixing a second range   flexible tubes (16) of larger size.   2 connection according to claim 1, characterized in that the group of elastic rings is constituted by a plurality of elastic rings having progressively decreasing diameters, from the innermost to the outermost, these diameters gradually following the   variation of the decreasing diameters of the tail   rubber (3), each elastic ring being adapted to fix a corresponding dimensional range of tubes Flexible.   3 connection according to claim 1, characterized in   that the elastic rings (8, 9) are constituted each   by independent bodies and can be removed from the connector itself, this conformation being able to cause an increase in tightening of the flexible tube attached to the connector in the case where this tube would be subject 2522388   to solicitations tending to provoke his withdrawal.