US3594893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for joining corrugated tubes
Assignee: KABELUND METALLWERKE
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Filing: 1968-11-21
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Granted: 1971-07-27
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Expires: 1988-11-21
Abstract
Abstract A method for joining corrugated tubes is disclosed according to which an end portion of a tube to be joined is upset, using, for example, a flange ring and a tool plate and tightening them together temporarily to effect upsetting, and to produce a wide end ring at the tube. After removal of the tool plate, the flange ring on such a tube end is tightened to the flange ring on a similarly prepared tube end or otherwise, to effect broad, tight contact of the end ring with whatever surface is presented for the connection.
Inventors
- 👤 Hubert Kuypers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:24
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/0036; B; B21; B21D; B21D39/00; B21D39/04; F16L23/00; F16L23/02; F16L23/024; F16L23/12; F16L33/00; F16L33/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
179 words
A method for joining a tube to a surface having an opening, the tube having corrugated walls with corrugation grooves and ridges extending helically or circularly around the tube axis, comprising the steps of: placing a flange ring onto the tube so that an end portion of the tube projects from the flange ring for an axial distance at least equal to an axial groove-to-groove distance of the corrugation; placing a plate in abutting relationship to the yet unsqueezed tube end as projecting from the flange ring and in parallel relation thereto; bolting the plate to the flange ring; axially tightening the bolts, to obtain axial upsetting of said projecting to be portion, to form a broad front end ring having an axially facing ring-shaped front face, the radial ring width being comparable with the height of a ridge above a groove of the corrugated tube and extending substantially concentrical to the axis of the tube; removing the bolts and plate; and gastightly joining the front end ring of the tube thus formed to the surface having the opening.
Claim 2
Independent Claim
179 words
A method for joining a tube to a surface having an opening, the tube having corrugated walls with corrugation grooves and ridges extending helically or circularly around the tube axis, comprising the steps of: placing a flange ring onto the tube so that an end portion of the tube projects from the flange ring for an axial distance at least equal to an axial groove-to-groove distance of the corrugation; placing a plate in abutting relationship to the yet unsqueezed tube end as projecting from the flange ring and in parallel relation thereto; bolting the plate to the flange ring; axially tightening the bolts, to obtain axial upsetting of said projecting to be portion, to form a broad front end ring having an axially facing ring-shaped front face, the radial ring width being comparable with the height of a ridge above a groove of the corrugated tube and extending substantially concentrical to the axis of the tube; removing the bolts and plate; and gastightly joining the front end ring of the tube thus formed to the surface having the opening.
Claim 3
Independent Claim
170 words
A method for joining a tube to a surface having an opening, the tube having corrugated walls with corrugation grooves and ridges extending helically around the tube axis resembling threading of a bolt, comprising the steps of: placing a flange ring onto the tube so that an end portion of the tube projects from the flange ring for an axial distance at least equal to an axial groove-to-groove distance of the corrugation, the flange ring having a configuration resembling threading of a matching nut, the ring being placed on the tube by threading the ring onto the tube; upsetting the projecting end portion of the tube in axial direction, to form a broad front end ring having an axially facing ring-shaped front face, the radial ring width being comparable with the height of a ridge above a groove of the corrugated tube and extending substantially concentrical to the axis of the tube; and gastightly joining the front end ring of the tube thus formed to the surface having the opening.
Claim 4
Independent Claim
170 words
A method for joining a tube to a surface having an opening, the tube having corrugated walls with corrugation grooves and ridges extending helically around the tube axis resembling threading of a bolt, comprising the steps of: placing a flange ring onto the tube so that an end portion of the tube projects from the flange ring for an axial distance at least equal to an axial groove-to-groove distance of the corrugation, the flange ring having a configuration resembling threading of a matching nut, the ring being placed on the tube by threading the ring onto the tube; upsetting the projecting end portion of the tube in axial direction, to form a broad front end ring having an axially facing ring-shaped front face, the radial ring width being comparable with the height of a ridge above a groove of the corrugated tube and extending substantially concentrical to the axis of the tube; and gastightly joining the front end ring of the tube thus formed to the surface having the opening.
Claim 5
Dependent Claim
26 words
The method as set forth in claim 1, the joining step including tightening of the flange ring to the object having said surface having said opening.
Claim 6
Dependent Claim
55 words
The method as set forth in claim 3, and including additionally, duplicating the upsetting step and the additional step with a second corrugated tube under inclusion of a second flange ring, the joining step including placing the resulting two ring faces of the two tubes in coaxial relation and tightening the two rings flanges together.
Claim 7
Dependent Claim
18 words
The method as set forth in claim 1, the ring-shaped front face being gastightly joined to the surface.
Claim 8
Dependent Claim
37 words
The method as set forth in claim 5, and including placement of a sealing element between the surface and the front face so that the joining step includes the inclusion of a sealing element in the joint.
Claim 9
Dependent Claim
15 words
The method as set forth in claim 5, the front face being subjected to annealing.
Claim 10
Dependent Claim
19 words
The method as set forth in claim 1, the ring-shaped front face being joined to the surface by welding.
Claim 11
Dependent Claim
49 words
The method as set forth in claim 1, including upsetting the end of a second, similar tube in an upsetting step similar to the one to which the first tube is subjected, the joining step including joining the two tubes by forcing the two end rings toward each other.
Claim 12
Dependent Claim
27 words
The method as set forth in claim 1, the joining step including urging the end ring toward the surface and tightening the end ring to the surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |