EP0069098A2
Expired / Lapsed
EP
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Tubular connector
Assignee: Lindab Ventilation AB
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Filing: 1982-06-16
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Granted: —
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Expires: 2002-06-16
Abstract
Abstract A tubular connector made from a sheet metal element (10) bent into tubular shape and having overlapping ends. Sealing rings (20) are positioned around the connector and preferably held in position by means of steel band (23) which are fixed around the connector and provided with a predetermined breaking point. The connector has a slightly smaller diameter than that of the pipes to be joined together and is expanded after insertion into the pipes by means of a screw device (13) connected with the axial ends of the pipe, the steel band (23) breaking and the seals being compressed between the outer periphery of the connector and the inner periphery of the joined-together pipes. A sealing cloth provided with folds or a strip of resilient material is con- I nected with the overlapping ends of the connector.
Inventors
- 👤 Lars Andersson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 08:09
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/06; F16L21/065; F24; F24F; F24F13/00; F24F13/02; F24F13/0209
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
167 words
A tubular connector intended for insertion into two pipes, particularly ventilation pipes, and for tight interconnection of them by expansion, which connector consists of a sheet metal element (10) bent into tubular shape and having overlapping ends (10a, lOb) which for increase and reduction of the diameter of the connector are relatively movable with the aid of a tensioning device (11-17) fixed to the connector, and sealing means (18, 20) provided on the outer side of the connector and between the overlapping ends (10a, 10b) thereof, characterised in that dimension stabilizing and sealing rings (20, 23) are positioned around the connector over the overlap joint and that a cloth (18) or strip of resilient material is tightly connected with at least one (l0a)-of the overlapping connector ends (10a, 10b) throughout the axial length of said end and so connected with the other connector end that the overlapping ends (10a, 10b) are relatively movable with the aid of the tensioning device (11, 17) with retained mutual sealing effect.
Claim 2
Dependent Claim
167 words
A tubular connector intended for insertion into two pipes, particularly ventilation pipes, and for tight interconnection of them by expansion, which connector consists of a sheet metal element (10) bent into tubular shape and having overlapping ends (10a, lOb) which for increase and reduction of the diameter of the connector are relatively movable with the aid of a tensioning device (11-17) fixed to the connector, and sealing means (18, 20) provided on the outer side of the connector and between the overlapping ends (10a, 10b) thereof, characterised in that dimension stabilizing and sealing rings (20, 23) are positioned around the connector over the overlap joint and that a cloth (18) or strip of resilient material is tightly connected with at least one (l0a)-of the overlapping connector ends (10a, 10b) throughout the axial length of said end and so connected with the other connector end that the overlapping ends (10a, 10b) are relatively movable with the aid of the tensioning device (11, 17) with retained mutual sealing effect.
Claim 3
Dependent Claim
59 words
A connector as claimed in claim 1, characterised in that the cloth (18) is fastened adjacent the edge of one end (l0a) by means of a fastening' strip (19) and spaced from the edge of the other end (lOb) by means of a fastening strip (19'), the cloth being arranged in folds (18') to permit expansion of the connector.
Claim 4
Dependent Claim
49 words
A connector as claimed in claim 1, characterised in that the cloth (18) is secured to the underside of one end (10a) spaced from the end edge and that the other end (10b) freely movably bears against the face of the cloth (18) remote from the first end (10a).
Claim 5
Dependent Claim
71 words
A connector as claimed in claim 1, 2 or 3, characterised in that the rings (20, 23) have dimension stabilizing bands (23) which are fixed around the connector to maaintain a diameter thereof which is smaller than that of the pipes to be joined together, said bands (23) being arranged to tear when the connector at the joining together of pipes is expanded by means of the tensioning device (11, 17).
Claim 6
Dependent Claim
29 words
A connector as claimed in claim 4, characterised in that the bands (23) are steel bands which are provided with a predetermined breaking point or weakened portion (24a, 25).
Claim 7
Dependent Claim
37 words
A connector as claimed in claim 1, 2 or 3, characterised in that flat springs are fixed around the connector to maintain a diameter thereof, which is smaller than that of the pipes to be joined together.
Claim 8
Dependent Claim
60 words
A connector as claimed in any of claim 4 or 5, in which the peripheral seals (20) are lip seals with an axial flange (22) engaging the pipe periphery, characterised in that the bands (23) are arranged around the connector over the axial flange . (22) of the seals (20) in order also to keep the seals (20) in position.
Claim 9
Dependent Claim
102 words
A connector as claimed in any of the preceding claims, characterised in that the tensioning device (11, 17) comprises a first lug (11) which is fixed adjacent one end edge of the connector, and a second lug (11) which is fixed at a distance from the other end edge of the connector and a screw (13) which is freely rotatably, but axially immovably mounted in one lug (11) and engages a threaded bore in the other lug (11) so that the lugs (11) and thereby the connector ends are movable towards and away from each other by rotation of the screw. (13).
Claim 10
Dependent Claim
33 words
A connector as claimed in any of the preceding claims, characterised by indicating means in conjunction with the joint between the connector ends (10a, lOb), indicating the degree of expansion of the connector.
Claim 11
Dependent Claim
70 words
A connector as claimed in claim 8, characterised in that the screw (13) has a head (17) of the same shape and dimensions as those of the self-cutting screws or like means which after the expansion of the connector are used to fix the connector in the joined-together pipes so that the same tool, usually a drilling machine, is usable for driving both the screw (13) and the self-cutting screws.
References Cited (Backward Citations)
No citation records indexed.
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