US3938834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe connection for plastic pipes comprising a transversely or helically corrugated pipe-connecting part
Assignee: Wavin BV
•
Filing: 1973-04-20
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Granted: 1976-02-17
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Expires: 1993-04-20
Abstract
Abstract Pipe connection for plastic pipes comprising two penetrating pipe parts and a receiving pipe part, which is provided with corrugations at each end. The radius of curvature or the height of the corrugations decrease from each end to the centre part of the receiving pipe part.
Inventors
- 👤 Albertus Antony Oostenbrink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:11
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/022; F16L17/00; F16L17/02; F16L17/025; F16L47/00; F16L47/06; F16L47/08; F16L47/10; Y; Y10; Y10S; Y10S285/00; Y10S285/903
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
120 words
Pipe-connection for the ends of plastic pipes comprising a tubular plastic pipe receiving part of preferably thermoplastic material receiving the end of a plastic pipe, said pipe receiving part having a recess in the vicinity of its end, sealing means accommodated in said recess, the receiving part having a substantially uniform wall thickness and at least two continuous annular corrugations being contiguous with the inserted pipe spaced inwardly of said recess, the cross section area of the corrugations between the corrugations and the pipe decreasing from the end of the receiving part, and the corrugations have a different radius of curvature for obtaining the different cross section areas and the inner diameters of the hollows between the corrugations being equal.
Claim 2
Dependent Claim
120 words
Pipe-connection for the ends of plastic pipes comprising a tubular plastic pipe receiving part of preferably thermoplastic material receiving the end of a plastic pipe, said pipe receiving part having a recess in the vicinity of its end, sealing means accommodated in said recess, the receiving part having a substantially uniform wall thickness and at least two continuous annular corrugations being contiguous with the inserted pipe spaced inwardly of said recess, the cross section area of the corrugations between the corrugations and the pipe decreasing from the end of the receiving part, and the corrugations have a different radius of curvature for obtaining the different cross section areas and the inner diameters of the hollows between the corrugations being equal.
Claim 3
Dependent Claim
23 words
Pipe-connection according to claim 1, wherein the receiving part has two receiving ends and an inner abutment edge between said two receiving ends.
Claim 4
Dependent Claim
19 words
Pipe-connection according to claim 1 wherein the receiving part comprises at least three corrugations adjacent each receiving end thereof.
Claim 5
Dependent Claim
19 words
Pipe connection according to claim 1 wherein the abutment edge in the receiving piece comprises an inwardly directed corrugation.
Claim 6
Dependent Claim
18 words
Pipe-connection according to claim 1 wherein the receiving pipe part is a widened end of a plastic pipe.
Claim 7
Dependent Claim
70 words
Receiving pipe part for a pipe connection for the ends of plastic pipes comprising a tubular element having an abutment edge therein and on both sides of the abutment edge there being at least two continuous annular corrugations, the outer surface thereof increasing from the abutment edge, by different heights, and different radii of curvature of said corrugations and the inner diameters of the hollows between the corrugations being equal.
Claim 8
Dependent Claim
70 words
Receiving pipe part for a pipe connection for the ends of plastic pipes comprising a tubular element having an abutment edge therein and on both sides of the abutment edge there being at least two continuous annular corrugations, the outer surface thereof increasing from the abutment edge, by different heights, and different radii of curvature of said corrugations and the inner diameters of the hollows between the corrugations being equal.
Claim 9
Dependent Claim
26 words
Receiving pipe part for use in a pipe connection according to claim 6, wherein one end of the receiving part is integral with a plastic tube.
References Cited (Backward Citations)
US1922431A
Cited
US3516693A
Cited
US3645547A
Cited
US3527484A
Cited
US3796447A
Cited
US3743329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |