Patent US3833984A successfully refreshed from Google Patents.
US3833984A
Expired / Lapsed
US
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Process and arrangement for double flanging of pipes
Assignee: ZAKO ROHRVERBINDUNGEN AND C GmbH
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Filing: 1972-06-27
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Granted: 1974-09-10
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Expires: 1992-06-27
Abstract
Abstract A process and arrangement for double flanging of pipes for making fluid-tight pipe joints. The pipe has a plastic interior coating and is coaxially mounted on an inner tubular pipe joint member having a collar and a conical bearing surface which is at least partially roughened.
Inventors
- 👤 K Dietzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:46
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/14; F16L13/16; F16L13/165; B; B21; B21D; B21D39/00; B21D39/04; F16J; F16J10/00; F16J10/02; F16L19/00; F16L19/02; F16L19/0237; F16L19/04; F16L19/043; F16L23/00; F16L23/12; F16L23/125; F16L39/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49446; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
135 words
A process for double-flanging of combination pipes having a plastic inner pipe portion and an outer pipe portion, including the steps of engaging said combination pipe in the region of a free end thereof; inserting an at least partially conically shaped member into said free end of said combination pipe and thereby jointly deforming said inner and outer pipe portions; widening said free end by means of said conically shaped member; said conically shaped member having a roughened surface and a collar portion, the roughened surface being adapted to engage the inner plastic pipe when the conically shaped member is inserted into said free end and to at least partially restrain the axial movement of said plastic inner pipe relative to said conically shaped member when axial tensional forces are applied to the combination pipe.
Claim 2
Dependent Claim
135 words
A process for double-flanging of combination pipes having a plastic inner pipe portion and an outer pipe portion, including the steps of engaging said combination pipe in the region of a free end thereof; inserting an at least partially conically shaped member into said free end of said combination pipe and thereby jointly deforming said inner and outer pipe portions; widening said free end by means of said conically shaped member; said conically shaped member having a roughened surface and a collar portion, the roughened surface being adapted to engage the inner plastic pipe when the conically shaped member is inserted into said free end and to at least partially restrain the axial movement of said plastic inner pipe relative to said conically shaped member when axial tensional forces are applied to the combination pipe.
Claim 3
Dependent Claim
34 words
The process for double-flanging of combination pipes pipes having a plastic inner pipe portion and an outer pipe portion, as set forth in claim 1, wherein said conically shaped member has an axial bore.
Claim 4
Dependent Claim
42 words
The process for double-flanging of combination pipes having a plastic inner pipe portion and an outer pipe portion, as set forth in claim 1, wherein the engaging of said combination pipe is effected by a holding ring having an inner roughened surface.
Claim 5
Dependent Claim
49 words
The process for double-flanging of combination pipes having a plastic inner pipe portion and an outer pipe portion, as set forth in claim 3, wherein said conically shaped member has an annular groove, and the step of bending the free end of said combination pipe into said annular groove.
Claim 6
Dependent Claim
90 words
An arrangement for double-flanging combination pipes having a plastic inner pipe portion and an outer pipe portion, comprising in combination, an at least partially conically shaped member having an outer frusto-conically shaped surface and an annular groove and being adapted to be coaxially inserted into the free end of a combination pipe, a spindle coaxially and rotatably mounted with respect to said conically shaped member and adapted to engage said outer pipe portion; and a tensioning member operatively connected to said spindle and adapted to coact with said holding ring.
Claim 7
Dependent Claim
90 words
An arrangement for double-flanging combination pipes having a plastic inner pipe portion and an outer pipe portion, comprising in combination, an at least partially conically shaped member having an outer frusto-conically shaped surface and an annular groove and being adapted to be coaxially inserted into the free end of a combination pipe, a spindle coaxially and rotatably mounted with respect to said conically shaped member and adapted to engage said outer pipe portion; and a tensioning member operatively connected to said spindle and adapted to coact with said holding ring.
Claim 8
Dependent Claim
33 words
The arrangement for carrying out the process as defined in claim 5, wherein the holding ring has an inner frusto-conical roughened surface, said tensioning member being coaxially and threadably mounted on said spindle.
Claim 9
Dependent Claim
26 words
The arrangement for carrying out tHe process as defined in claim 5, wherein a ball bearing is mounted between the spindle and the conically shaped member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |