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1. (WO1980000067) METHODE ET PIECES DE CONNEXION POUR RACCORDEMENT DE TUBES
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

1. A method of joining two or more conduits (3a, 3b, 3c) with a one-piece tubular connecting piece (1) wherein the ends of the conduits are located at respective openings (4a, 4b, 4c) in the connecting piece and are secured to said connecting piece to communicate with the respective openings, characterised in that support means (5a, 5b, 5c) is inserted through a sealable opening (6) in the
connecting piece to support at least one conduit end at the respective opening, said at least one conduit end is secured to the connecting piece to communicate with the respective opening whilst being supported by said support means, the support means is withdrawn through said
sealable opening, and the sealable opening is then sealed.

2. A method as claimed in Claim 1, wherein the ends of the conduit (3a, 3b, 3c) are secured to the connecting piece (1) by welding.
3.- A method as claimed in Claim 2 wherein the ends of the conduit (3a, 3b, 3c) and/or the connecting piece (1) are formed of thermoplastics.
4. A method as claimed in Claim 1, wherein the conduits (3a, 3b, 3c) are tubes.
5. A method as claimed in Claim 1, characterised in that the supporting means (5a, 5b, 5c) supports each of the said conduits (3a, 3b, 3c) whilst they are secured to the connecting piece (1).
6. A method as claimed in Claim 1, characterised in that the sealable opening (6) is a slot.
7. A method as claimed in Claim 6 wherein the connecting piece (1) is elongate, characterised in that the slot (6) extends longitudinally of the connecting piece.
8. A method as claimed in any one of the preceding
Claims, characterised in that the sealable opening (6) is sealed using flaps (7a, 7b) extending integrally from the connecting piece.

9. A method as claimed in Claim 8, characterised in that the flaps (7a, 7b) are formed of thermoplastics and the opening (6) is sealed by heating and pressing the flaps together over the opening (6).
10. A method as claimed in Claim 2, characterised in that the support means (5a, 5b, 5c) constitutes at least one electrode which is used in welding said at least one conduit end (3a, 3b, 3c) to the connecting piece.
11. A method as claimed in Claim 1 wherein the connecting piece openings for communication with the conduits are defined by open tubular end portions (4a, 4b, 4c) of said connecting piece (1) and the conduit ends are
tubular and are inserted into or surround the respective tubular end portions of the connecting piece.
12. A one-piece tubular connecting piece for use in a method as claimed in Claim 1 having two or more
openings adapted to be secured to ends of respective conduits, characterised in that the connecting piece (1) has a sealable opening (6) adapted to receive support means (5a, 5b, 5c) for supporting at least one conduit end (3a, 3b, 3c) at the respective opening (4a, 4b, 4c) whilst said at least one conduit end is secured to the connecting piece to communicate with the respective opening and to permit withdrawal of said support means after the said at least one conduit end has been so secured to the connecting piece.
13. A connecting piece as claimed in Claim 12
characterised in that the sealable opening (6) is a slot.

14. A connecting piece as claimed in Claim 13 wherein the connecting piece (1) is elongate characterised in that the slot (6) extends longitudinally of the connecting piece.
15. A connecting piece as claimed in Claim 12
characterised in that flaps (7a, 7b) are formed integrally with the connecting piece for use in sealing the opening (6).

16. A connecting piece as claimed in Claim 13 or
Claim 14 characterised in that two flaps (7a, 7b) extend longitudinally at respective sides of the slot (6) for use in sealing the slot.
17. A connecting piece as claimed in Claim 16
characterised in that the opposed surfaces (8a, 8b) of the flaps (7a, 7b) are plane-convex surfaces whereby the said surfaces smoothly mutually diverge outwardly from the slot (6).
18. A connecting piece as claimed in Claim 12
characterised in that the sealable opening (6) is located opposite an opening (4b) in the connecting piece for a conduit end.
19. A connecting piece as claimed in Claim 12 wherein the openings (4a, 4b, 4c) in the connecting pieces for the conduit ends are tubular end portions of the
connecting piece (1) adapted to surround or be surrounded by the respective conduit ends (3a, 3b, 3c).
20. A connecting piece as claimed in Claim 19 wherein the central axes of said tubular end portions (4a, 4b, 4c) are substantially coplanar and the connecting piece (1) has a "Y" or "T" shaped axial section in said plane.
21. A connecting piece as claimed in Claim 12 formed of thermoplastics.

AMENDED CLAIMS
(received by the International Bureau on 23 November 1978 (23.11.79)

1. A method of joining two or more conduits (3a, 3b, 3c) by means of a one-piece tubular connecting piece (1), wherein the ends of the conduits are located at respective openings (4c, 4b, 4c) in the connecting piece, wherein support means (5a, 5b, 5c) is inserted into the connecting piece to support at least one conduit end at the respective opening whilst being secured to the connecting piece, and wherein the so located ends of the conduits are secured to said respective openings in the connecting piece whilst being supported by the support means, characterised in that said support means (5a, 5b, 5c) is inserted into and withdrawn from, respectively, the connecting piece through an especially designed sealable opening (6) in the connecting piece, which opening is then sealed.
2. A method as claimed in Claim 1, wherein the ends of the conduit (3a, 3b, 3c) are secured to the connecting piece (1) by welding.
3. A method as claimed in Claim 2 wherein the ends of the conduit (3a, 3b, 3c) and/or the connecting piece (1) are formed of thermoplastics.
4. A method as claimed in Claim 1, wherein the conduits

(3a, 3b, 3c) are tubes.
5. A method as claimed in Claim 1, characterised in that the supporting means (5a, 5b, 5c) supports each of the said conduits (3a, 3b, 3c) whilst they are secured to the connecting piece (1).
6. A method as claimed in Claim 1, characterised in that the sealable opening (6) is a slot.
7. A method as claimed in Claim 6 wherein the connecting piece (1) is elongate, characterised in that the slot (6) extends longitudinally of the connecting piece.
8. A method as claimed in any one of the preceding
Claims, characterised in that the sealable opening (6) is sealed using flaps (7a, 7b) extending integrally
from the connecting piece.

9. A method as claimed in Claim 8, characterised in that the flaps (7a, 7b) are formed of thermoplastics and the opening (6) is sealed by heating and pressing the flaps together over the opening (6).
10. A method as claimed in Claim 2, characterised in that the support means (5a, 5b, 5c) constitutes at least one electrode which is used in welding said at least one conduit end (3a, 3b, 3c) to the connecting piece.
11. A method as claimed in Claim 1 wherein the connecti piece openings for communication with the conduits are defined by open tubular end portions (4a, 4b, 4c) of said connecting piece (1) and the conduit ends are
tubular and are inserted into or surround the respective tubular end portions of the connecting piece.
12. A one-piece tubular connecting piece for use in a method as claimed in Claim 1 having two or more openings adapted to be secured to ends of respective conduits, characterised in that the connecting piece (1) has an especially designed sealable opening (6) adapted to receive support means (5a, 5b, 5c) for supporting at least one conduit end (3a, 3b, 3c) at the respective opening
(4a, 4b, 4c) whilst said at least one conduit end is secured to the connecting piece and to permit withdrawal of said support means after the said at least one conduit end has been so secured to the connecting piece.
13. A connecting piece as claimed in Claim 12
characterised in that the sealable opening (6) is a slot.

14 . A connecting piece as claimed in Claim 13 wherein the connecting piece (1) is elongate characterised in that the slot (6) extends longitudinally of the connecting piece.
15. A connecting piece as claimed in Claim 12
characterised in that flaps (7a, 7b) are formed integrally with the connecting piece for use in sealing the opening (6).

16. A connecting piece as claimed in Claim 13 or Claim 14 characterised in that two flaps (7a, 7b) extend longitudinally at respective sides of the slot (6) for use in sealing the slot.
17. A connecting piece as claimed in Claim 16
characterised in that the opposed surfaces (8a, 8b) of the flaps (7a, 7b) are plane-convex surfaces whereby the said surfaces smoothly mutually diverge outwardly from the slot (6).
18. A connecting piece as claimed in Claim 12
characterised in that the sealable opening (6) is located opposite an opening (4b) in the connecting piece for a conduit end.
19. A connecting piece as claimed in Claim 12 wherein the openings (4a, 4b, 4c) in the connecting pieces for the conduit ends are tubular end portions of the
connecting piece (1) adapted to surround or be surrounded by the respective conduit ends (3a, 3b, 3c).
20. A connecting piece as claimed in Claim 19 wherein the central axes of said tubular end portions (4a, 4b, 4c) are substantially coplanar and the connecting piece (1) has a "Y" or "T" shaped axial section in said plane.
21. A connecting piece as claimed in Claim 12 formed of thermoplastics.

STATEMENT UNDER ARTICLE 19

By the amendment "by means of" on line 2 in the amended claim 1, it is now more clearly stated that the invention is related to a method of joining two or more conduits via a connecting piece, and not face to face. To facilitate such a joining and to make it possible to support all of the ends, including the last end, to be joined to the connecting piece, said connecting piece has an especially designed opening, which is sealable and which is adapted only for insertion of a support means in the connecting piece to support said ends whilst being secured to the connecting piece.
It is to be noted that thanks to this especially designed opening it is possible also to support each of the conduit ends at the same time, which was not possible according to the prior art technique for joining two or more conduits by means of a connecting piece.
A connecting piece according to the prior art has just as many openings as the number of conduit ends to be connected to said connecting piece, which apparently made it impossible to support the last one of said ends from inside of the connecting piece, in a method of joining two or more conduits by means of a connecting piece according to the prior art technique.
The cancellation of the expression "to communicate with the respective opening" in claim 12 was made just to facilitate the understanding of claim 12, making it thus more easily readable.