FR2525155A1 - DEVICE FOR REPAIRING HOSES AND TIRES WITHOUT CHAMBER - Google Patents

Abstract

DEVICE FOR REPAIRING TIRES AND HOSES WITHOUT A CHAMBER, ACCORDING TO WHICH AN ADHESIVE OF APPROPRIATE COMPOSITION IS INJECTED THROUGH THE PUNCTURE HOLE, FLOOR OF THE INTERNAL SURFACE OF THE HOSE OR TIRE, USING AN INJECTION NEEDLE AT A CONNECTED SOURCE OF SUPPLY OF GLUE, CHARACTERIZED IN THAT THE SAID NEEDLE 10 INCLUDES A SIDE SLOT 16 OPENING INTO AN AXIAL BORE 18 ENSURING THE SUPPLY OF GLUE AND IN THAT THE said NEEDLE ENDS IN A SPATULA 22 ON WHICH A DROP OF DEPOSIT IS DEPOSITED GLUE, BEFORE THE INSERTION OF THE NEEDLE IN THE PERFORATION AND INJECTION OF THE GLUE.

Description

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  The present invention relates to a repair device

  tubeless tubing and tire ration.

  For several years, the Applicant has developed and marketed, on the one hand tubeless tubulars of the type described in its French patent NO 76 10 229, of April 8, 1976, and on the other hand, tubeless tires for cycles , as described

  in its French patent number 78 08 859, filed on March 28, 1978.

  In such hoses and tires, the waterproof layer which retains the air is completely integral with the casing. As a result, in the event of a puncture, the hole perforated in the tread and the one located in the waterproof layer. stay in

  coincidence, despite the deflation of the hose or tire.

  To repair such tubular and tubeless tires and tires, various solutions have been envisaged, among which the following two main ones may be cited: at the injection, by the valve, of rubber latex or of another suspension in emulsion, capable of '' close more or

  less perforation Given the ha-

  repairing the product thus injected, the repair is not always effective;

  b injection, through the very hole of the puncture, flush with the su-

  inner side of the tire or tire, with an appropriate adhesive, this injection being carried out using a needle which can be

  directly mounted on a glue tube.

  In its French patent No. 77 14 680, filed on May 13, 1977, the plaintiff claimed a process and a device of the type mentioned above in b), and which consists in operating in two stages,

  using an injection needle comprising a la-

  teral and an opening at its end During the first stage, thanks to the lateral opening, a crown of glue is deposited around the perforation, and, during the second stage, a bead of glue is deposited in the center of the perforation through the planned opening

  at the end of the needle, this pearl extending to the neck

  ronne to constitute a large deposit, centered on the hole of the

  puncture, to constitute a repair part.

  The present invention relates to a repair device of the same type as that mentioned above, but designed so as to

further simplify the repair.

  Consequently, the subject of this invention is a device for repairing tires and tubular casings, according to which an adhesive of appropriate composition is injected through the very hole of the puncture, flush with the internal surface of the tubular or tire, using an injection needle which can be directly mounted on a tube of glue or on a syringe containing the glue to be injected, this device being essentially characterized in that said needle has a lateral slot opening out into an axial bore ensuring the supply of glue and in that this needle ends with a spatula on which a

  drop of glue before inserting the needle into the perfo-

ration and injection of glue.

  Other features and advantages of this invention

  will emerge from the description given below with reference to

  attached drawings which illustrate an embodiment given by way of example without any limiting character In the drawings: FIG. 1 is an enlarged view of a repair device according to the present invention; Figure 2 is a vertical axial section of Figure 1; FIGS. 3 and 4 are schematic views illustrating an example of the manufacture of an injection needle used in the device according to this invention, and

  Figures 5 to 9 illustrate the successive stages of repair

  ration of a tubeless hose using the device according to

the invention.

  We refer first to Figures 1 and 2.

  It is seen there that the device according to the invention is essential-

  LEMENT consisting of a needle, designated as a whole by the reference 10, of length and diameter suitable for the hoses to be repaired, can be placed either at the end of a syringe containing an adhesive suitable for repairing hoses and tires , or as shown here, directly on the outlet of an adhesive tube 12 (FIGS. 5 to 8), by means of a screwed end piece 14.

  The injection needle 10 has a long side slot

  tudinal 16 which leads to an axial bore 18 ensuring the ali-

  glue mentation from the tube 12 The position of the lateral slit 16 is chosen so that, when the needle is fully inserted into the tire to be repaired (FIG. 7)

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  it opens into the interior of this tire or tubular 20, preferably flush with its internal surface. Practically, for a device

  intended to repair hoses and tires of the type currently sold

  specialized, the total length of the needle will be of the order of 11 mm and the length of the slot will be of the order of 3 mm, the upper edge

  of the slot being located about 2.5 mm from the lower edge

  of the end piece 14, and the external diameter of the needle being of the order of 1.5 mm Of course these dimensions are given to

purely indicative title.

  The needle 10 ends with a spatula 22 whose role

  will appear during the description, which follows, of the operation

of this device.

  To carry out a repair (FIG. 5), one begins by pressing the tube 12 so as to reveal a drop of glue 24 which is deposited on the spatula of the needle. The next step (FIG. 6) consists in pinching the hose or the tire 20 where the puncture 26 was located, then insert the needle 10

  in hole 26, as far as possible Then (fi-

  gure 7) the key 28 which is fitted with the tube 12 is turned so as to

  place a pile of 24 'glue in the tire around the puncture.

  Then (figure 8) the needle is slowly withdrawn, while turning the tube as shown in the drawing During this combined movement, the needle finished with the spatula, coated with glue the edges of the puncture and deposits a last drop glue which

  permanently seal the hole (figure 9) The pile of glue 34

  after drying a real repair piece centers on the puncture, the repair being completed by the adhesive deposited on the walls of the puncture when the needle is removed,

as specified above.

  The repair is carried out on the tire or the hose mounted on the rim The tire or the hose is then maintained with moderate inflation for a time sufficient to ensure the drying and hardening of the adhesive deposited The adhesive used can be chosen from among compositions which have a set of properties allowing easy injection, rapid drying and

  good adhesion to the inner wall of the tire or tire

  adorn. Figures 5 and 4 illustrate a non-limiting example of

  manufacturing an injection needle according to this invention.

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  We start with a cylindrical needle blank 10 'already provided with a lateral slot 16' and having one end 50, cut at a bevel. This needle blank is then crushed (FIG. 4) between two punches 32, 32 'of so as to obtain the shape of a needle with a flared tip at the spatula shown in FIGS. 1 and 2. It remains to be understood that this invention is not limited to the embodiment described and shown but that it

includes all variants.

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REVINIDICATIONS

  1. Device for repairing tires and tubular tubulars, according to which an adhesive of appropriate composition is injected through the very hole of the puncture, flush with the internal surface of the tubular or tire, using an injection needle. tion connected to a glue supply source, characterized in that said needle (10) has a lateral slot (16) leading to an axial bore (18) ensuring the supply of glue and in that said needle ends in a spatula (22) on which a drop of glue is deposited, before introduction

  of the needle in the perforation and the injection of the glue.

  2. Device according to claim 1, characterized in that said injection needle is mounted directly, by a

  screwable tip (14) on the end of a glue tube (12).

  3 Device according to claim 1, characterized in that said injection needle is mounted on a syringe which

contains the glue to be injected.