Source: https://patents.google.com/patent/US6231090B1/en
Timestamp: 2020-08-06 11:03:00
Document Index: 584021241

Matched Legal Cases: ['art 7', 'art 7', 'art 11', 'art 11', 'art 7', 'art 11', 'art 11', 'arts 11', 'art 11', 'arts 11', 'art 7', 'art 11', 'arts 11', 'art 11', 'arts 11', 'art 7', 'art 11', 'arts 11', 'art 7', 'art 7', 'art 11', 'art 7', 'art 7', 'art 7', 'arts 11', 'art 11', 'art 11', 'arts 11', 'art 11', 'art 63', 'art 7', 'arts 63', 'art.\n1']

US6231090B1 - Tubular joint - Google Patents
US6231090B1
US6231090B1 US09/282,379 US28237999A US6231090B1 US 6231090 B1 US6231090 B1 US 6231090B1 US 28237999 A US28237999 A US 28237999A US 6231090 B1 US6231090 B1 US 6231090B1
out preventing
US09/282,379
Kunimorikagaku Co Ltd
1999-03-31 Application filed by Kunimorikagaku Co Ltd filed Critical Kunimorikagaku Co Ltd
1999-03-31 Priority to US09/282,379 priority Critical patent/US6231090B1/en
1999-03-31 Assigned to KUNIMORIKAGAKU CO., LTD. reassignment KUNIMORIKAGAKU CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUKAO, HITOSHI, MATSUURA, HIDEO, OZAKI, OSAMU
1999-04-01 Priority to EP99106685A priority patent/EP1041332A1/en
2001-05-15 Publication of US6231090B1 publication Critical patent/US6231090B1/en
229920003002 synthetic resins Polymers 0.000 claims abstract description 16
239000000057 synthetic resins Substances 0.000 claims abstract description 12
On the outside periphery of each enlarged part 7 a is circumferentially formed an engaging groove 7 b as a receptive part. A resin-made fall-out preventing member 11 is fitted to the end part of each enlarged part 7 a. The resin-made fall-out preventing member 11 is made of, for example, olefin or polyacetal synthetic resin similar to that of the joint body 5 or made of compound reinforced resin containing reinforcing fibers in the above described kinds of synthetic resin. The resin-made fall-out preventing member 11 comprises an outside cylindrical part 11 a and an inside cylindrical part 11 b both of which are fitted on the end part of the enlarged part 7 a.
On the inner surface of the outside cylindrical part 11 a is integrally formed an engaging claw 11 d (see FIG. 5) that is adapted to engage with the engaging groove 7 b, and circumferentially formed on the outer surface of the cylindrical part 11 a are notched parts 11 c each having a required width and being spaced at equal intervals. The outside cylindrical part 11 a is made elastically deformable because of the notched parts 11 c. The engaging claw 11 d is formed so that the front side thereof facing the enlarged part 7 a has a tapered surface and the other side in upright surface.
On the inside cylindrical part 11 b are circumferentially formed notched parts 11 e at equal intervals. The inside cylindrical part 11 b except the notched parts 11 e is provided with fall-out stopper 11 f which in a slanting manner extends toward the center line of the enlarged part 7 a and also toward the joint body 5. The inside cylindrical part 11 b is adapted to be elastically deformable so as to enlarge its diameter owing to the notched parts 11 e.
Next, the operation of connecting both the tubes 3 using the tubular joint 1 will be described.
First, the fitting process of the resin-made fall-out preventing member 11 will be described. As shown in FIG. 4, the resin-made fall-out preventing member 11 is pressed into the enlarged part 7 a of each connection port 7 where the sealing member 9 is integrally formed on the inner periphery of the enlarged part 7 a. The engaging claw 11 d of the outside cylindrical part 11 a is elastically deformed so as to enlarge its diameter according to slidable contact with the outer periphery of the end part of the enlarged part 7 a and thereafter engaged with the engaging groove 7 b so that the resin-made fall-out preventing member 11 is prevented from falling out of the enlarged part 7 a. At this time, the fall-out stopper 11 f is positioned in the interior of the enlarged part 7 a.
Next, on the outer periphery of the end part of the tube 3 to be connected is circumferentially formed an engaging groove 3 a with a triangular section. When the tube 3 is pressed into the connection port 7 of the tubular joint 1, the sealing flap 9 b and the fall-out stopper 11 f are elastically deformed so as to enlarge their diameters owing with slidable contact to the outer periphery of the tube 3 when the tube 3 is inserted.
In the above description, a plurality of notched parts 11 c are circumferentially formed on the outside cylindrical part 11 a of the resin-made fall-out preventing member 11. Thereby, the outside cylindrical part 11 a comes to be elastically deformable so as to enlarge its diameter when the resin-made fall-out preventing member 11 is pressed into the connection port 7. However, as shown in FIG. 6, the structure may be adapted such that an engaging claw or claws 11 d is/are formed on the inner periphery entirely or at a predetermined interval without the provision of the notched parts 11 c on the outside cylindrical part 11 a.
In this case, since a large force is required to press the resin-made fall-out preventing member 11 into the end part of each connection port 7, a known press may be used for forced press-in of the resin-made fall-out preventing member 11 to engage the engaging claw(s) 11 d with the engaging groove 7 b.
Then, each engaging claw 11 d climbs over each lug 63 a and enters each receptive part 63 extending around the axial line, so that the resin-made fall-out preventing member 11 is fixed to each enlarged part 7 a.
Besides, as a structure for restricting the returning of the engaging claws 11 d that have entered the receptive parts 63, the structure may be adopted such that a cam surface is formed on the wall of the receptive part to restrict the returning due to strengthening of the engaged condition according to the turning of the resin-made fall-out preventing member against the enlarged part.
1. A tubular joint adapted to connect a pair of pipes, said tubular joint comprising:
a joint body made of a synthetic resin and having a pair of connection ports integrally formed on respective sides thereof, said connection ports having a diameter slightly larger than an outside diameter of the pipes to be connected such that the pipes to be connected can be inserted and fitted in the connection ports;
a resiliently deformable sealing member integrally formed along an inside circumferential surface of each of the connection ports by injection molding of elastomer resin and adapted to be pressure-fitted to an outside circumferential surface of the respective pipes to be connected as the pipes are inserted and fitted in the connection ports;
an engaging groove formed around an axial line on an outside circumferential surface of each of the connection ports; and
a synthetic resin-made fall-out preventing member fixed at an end portion of each of the connection ports and comprising an outside cylindrical portion provided on the outside surface of each of the connection ports and an inside cylindrical portion provided on the inside surface of each of the connection ports;
wherein the outside cylindrical portion of each of the fall-out preventing members has a tapered surface adapted to enable the fall-out preventing members to be press-fitted onto the respective connection ports, and comprises a plurality of engaging portions that are engaged with the engaging groove formed around the axial line on the outside circumferential surface of each of the connection ports as the fall-out preventing members are press-fitted thereon; and
wherein the inside cylindrical portion of each of the fall-out preventing members extends toward a center of the connection ports in an inclined manner, and comprises: (i) a plurality of circumferentially formed notched parts spaced at equal intervals, such that the inside cylindrical part is elastically deformable so as to increase a diameter of the inside cylindrical part, and (ii) a plurality of fall-out stoppers whose tip ends are shaped so as to be engaged in a groove portion formed around an axial line on the outside circumferential surface of the respective pipes to be connected as the pipes are inserted and fitted in the connection ports.
2. The tubular joint according to claim 1, wherein the outside cylindrical part of each of the fall-out preventing members also comprises a plurality of circumferentially formed notched parts spaced at equal intervals, such that the outside cylindrical part is elastically deformable so as to increase a diameter of the outside cylindrical part.
a resiliently deformable sealing member formed along an inside circumferential surface of each of the connection ports by injection molding of elastomer resin and adapted to be pressure-fitted to an outside circumferential surface of the respective pipes to be connected as the pipes are inserted and fitted in the connection ports;
a plurality of receptive parts formed around an axial line on an outside circumferential surface of each of the connection ports; and
wherein the outside cylindrical portion of each of the fall-out preventing members comprises a plurality of engaging portions that are adapted to be rotatively engaged with the receptive parts formed around the axial line on the outside circumferential surface of each of the connection ports; and
US09/282,379 1999-03-31 1999-03-31 Tubular joint Expired - Fee Related US6231090B1 (en)
US09/282,379 US6231090B1 (en) 1999-03-31 1999-03-31 Tubular joint
EP99106685A EP1041332A1 (en) 1999-03-31 1999-04-01 Plastic tubular joint with plastic grip-ring
US6231090B1 true US6231090B1 (en) 2001-05-15
ID=26152954
US09/282,379 Expired - Fee Related US6231090B1 (en) 1999-03-31 1999-03-31 Tubular joint
US (1) US6231090B1 (en)
EP (1) EP1041332A1 (en)
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JP3482431B2 (en) * 2001-05-10 2003-12-22 古河電気工業株式会社 Pipe fittings
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JPH10153287A (en) * 1996-11-20 1998-06-09 Kunimori Kagaku Co Ltd Pipe coupling structure
1999-03-31 US US09/282,379 patent/US6231090B1/en not_active Expired - Fee Related
1999-04-01 EP EP99106685A patent/EP1041332A1/en active Pending
US20110148108A1 (en) * 2008-04-10 2011-06-23 Edgar Ammon Coupling unit
US9121535B2 (en) 2008-04-10 2015-09-01 Mahle International Gmbh Coupling unit
EP1041332A1 (en) 2000-10-04
US10107427B2 (en) 2018-10-23 Secured in place gasket for sealing plastic pipelines, method of manufacture and method of installation
AU700761B2 (en) 1999-01-14 Hose coupling device
US6692038B2 (en) 2004-02-17 Plug connection device
Owner name: KUNIMORIKAGAKU CO., LTD., JAPAN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FUKAO, HITOSHI;MATSUURA, HIDEO;OZAKI, OSAMU;REEL/FRAME:009881/0459