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EP0219705A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Improved watertight joint for flexible pipes

Assignee: Protec Pordenonese SpA
•
Filing: 1986-09-23
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Granted: —
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Expires: 2006-09-23
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Abstract

Abstract A watertight joint in molded plastic material for jointing flexible pipes between them or with other devices, consisting or: one male part (A) with corresponding male fitting piece (1), which is waterrightly insertable into a female part (B) comprising: a single joining plastic piece (2), shaped at the mating end with a female body (bl) and at the opposite end with an externally threaded portion including an inner extenally cone-shaped joining tube (3) suitable to support the end of the flexible pipe (C) to be connected, said joining tube being housed inside a pipe clamping toothed crown (4) protruding from the threaded portion, the teeth of which, being integrally molded with the female body, extended downwards in longitudinal direction and elastically flectable towards said joining tube (4); a joint coupling bushing (b3) elastically axially movable to move inwards by conical internal shaping (8,8'), elastically movable joint clamping means (7); an inside cone shaped pipe coupling ring nut (b2), screwable backwards overthe pipe to be connected (C) and overthe respective crown (4) to push the respective pipe clamping crown teeth against the pipe to realize the tightening condition; an optionable inner comeback preventer valve (b4); wherein: said joint clamping means are integrally molded with the respective joining plastic piece (2) extending in frontward direction, realized as longitudinal elastic lengthwise tongue fastening means (7) shaped with joint clamping inner tooth (7'); said elastic movement of said joint coupling bushing (b3) is realized by helicoidal pu: ing springs (5) integrally molded iwth said joint plastic piece (2) stretching out from one corresponding abutting flange (6).

Inventors

  • 👤 Dino Munini

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 07:29
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/08; F16L37/084; F16L37/098; F16L37/0985; F16L37/28; F16L37/38; F16L37/40

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 276 words
A watertight joint in molded plastic material for jointing flexible pipes between them or with other devices, consisting of: - one male part (A) with corresponding male fitting piece (1), which is watertightly inserteable into - a female part (B) compring: - a single jointing plastic piece (2), shaped at the mating end with a female body (bl) and at the opposite end with an externally threaded portion including an inner externally cone-shaped jointing tube (3) 10 suitable to support the end of the flexible pipe (C) to be connected, said jointing tube being housed inside a pipe clamping toothed crown (4) protruding from the threaded portion, the teeth of which, being integrally molded with the female body, extended downwards in longitudinal direction and elastically flectable towards said jointing 15 tube (4); - a joint coupling bushing (b3) elastically axially movable to move invards by conical internal shaping (8,8'), elastically movable joint clamping means (7); - an inside cone shaped pipe coupling ring nut (b2), screwable 20 backwards over the pipe to be connected (C) and over the respective crown (4) to push the respective pipe clamping crown teeth against the pipe to realize the tightening condition; - an optionable inner comeback preventer valve (b4); characterized in that: - said joint clamping means are integrally molded with the respective jointing plastic piece (2) extending in frontward direction, realized as longitudinal elastic lengthwise tongue fastening means (7) shaped with joint clamping inner tooth (7'); - said elastic mouvement of said joint coupling bushing (b3) is realized by elicoidal pushing springs (5) integrally molded with said joint plastic piece (2) stretching out from one corresponnding abutting flange (6).
Claim 2
Dependent Claim 276 words
A watertight joint in molded plastic material for jointing flexible pipes between them or with other devices, consisting of: - one male part (A) with corresponding male fitting piece (1), which is watertightly inserteable into - a female part (B) compring: - a single jointing plastic piece (2), shaped at the mating end with a female body (bl) and at the opposite end with an externally threaded portion including an inner externally cone-shaped jointing tube (3) 10 suitable to support the end of the flexible pipe (C) to be connected, said jointing tube being housed inside a pipe clamping toothed crown (4) protruding from the threaded portion, the teeth of which, being integrally molded with the female body, extended downwards in longitudinal direction and elastically flectable towards said jointing 15 tube (4); - a joint coupling bushing (b3) elastically axially movable to move invards by conical internal shaping (8,8'), elastically movable joint clamping means (7); - an inside cone shaped pipe coupling ring nut (b2), screwable 20 backwards over the pipe to be connected (C) and over the respective crown (4) to push the respective pipe clamping crown teeth against the pipe to realize the tightening condition; - an optionable inner comeback preventer valve (b4); characterized in that: - said joint clamping means are integrally molded with the respective jointing plastic piece (2) extending in frontward direction, realized as longitudinal elastic lengthwise tongue fastening means (7) shaped with joint clamping inner tooth (7'); - said elastic mouvement of said joint coupling bushing (b3) is realized by elicoidal pushing springs (5) integrally molded with said joint plastic piece (2) stretching out from one corresponnding abutting flange (6).
Claim 3
Dependent Claim 49 words
A joint according to the claim'l., characterized in that the said male part (A) consisits of a jet nozzle device and in his male fitting piece (1), an integrally molded cup-shaped gasket (10') in output direction extended is realized, as tightening means against an adjustable screwable jet cover (a2).
Claim 4
Dependent Claim 56 words
A joint according to the claim 1., characterized in that the said jointing plastic piece (2) of said female part (B) has on the abuting end of the mating side (bl), a toothed stopping and fitting flange (9) which fits corresoponding guides (9') in the corresoponding male body (14), in coder to prevent a rotating movement.
Claim 5
Dependent Claim 47 words
A joint according to the claim 1., characteriwed in that guiding ribs means inside said joint coupling bushing (b3) are provided, to engage corresponding guiding means (11') in the female body (2) in order to allow a mututal axial sliding, preventing at the same time rotating movements.
Claim 6
Dependent Claim 39 words
A joint according to the claim 1., characterized in that inside a female body (2) a shoulder (12) engaging a comeback preventer velve (b4) with watertight external annular gasket (13), in axial floating condition controlled by elastic feet (13').

References Cited (Backward Citations)

DE1947939B2 Cited
DE2734117B2 Cited

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