US5839477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated resin pipe
Assignee: Totaku Industries Inc
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Filing: 1997-04-09
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Granted: 1998-11-24
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Expires: 2017-04-09
Abstract
Abstract The external shape of a pipe wall is formed of sectionally rectangular wall portions and sectionally circular wall portions which are disposed alternately in an axial direction of the pipe, and the internal shape of the pipe wall is formed into a substantially linear circular-cylindrical surface. The whole of the pipe wall is formed of a material of synthetic resin or rubber.
Inventors
- 👤 Teluo Murayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:59
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/14; F16L11/15; F16L9/00; F16L9/16; F16L9/18
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
54 words
A corrugated pipe, comprising: a pipe wall having an external shape and an internal shape, said external shape comprising alternating sectionally rectangular wall portions and sectionally circular wall portions, said internal shape comprising a substantially linear circular-cylindrical surface, said pipe wall comprising a material selected from the group consisting of synthetic resin and rubber.
Claim 2
Dependent Claim
54 words
A corrugated pipe, comprising: a pipe wall having an external shape and an internal shape, said external shape comprising alternating sectionally rectangular wall portions and sectionally circular wall portions, said internal shape comprising a substantially linear circular-cylindrical surface, said pipe wall comprising a material selected from the group consisting of synthetic resin and rubber.
Claim 3
Dependent Claim
66 words
A corrugated pipe, comprising: an outer pipe having an outer surface comprising alternating sectionally rectangular wall portions and sectionally circular wall portions; and an inner pipe having a substantially linear circular-cylindrical inner surface, said inner pipe being positioned inside of said outer pipe and integrally connected to said outer pipe, said corrugated pipe comprising a material selected from the group consisting of synthetic resin and rubber.
Claim 4
Dependent Claim
66 words
A corrugated pipe, comprising: an outer pipe having an outer surface comprising alternating sectionally rectangular wall portions and sectionally circular wall portions; and an inner pipe having a substantially linear circular-cylindrical inner surface, said inner pipe being positioned inside of said outer pipe and integrally connected to said outer pipe, said corrugated pipe comprising a material selected from the group consisting of synthetic resin and rubber.
Claim 5
Dependent Claim
70 words
A corrugated pipe comprising: a pipe wall having an external shape and an internal shape, said external shape comprising alternating sectionally rectangular wall portions and sectionally circular wall portions, said internal shape comprising a substantially linear circular-cylindrical surface, said pipe wall comprising a material selected from the group consisting of synthetic resin and rubber, wherein each of said sectionally rectangular wall portions has a square sectional shape with arcuate corners.
Claim 6
Dependent Claim
70 words
A corrugated pipe comprising: a pipe wall having an external shape and an internal shape, said external shape comprising alternating sectionally rectangular wall portions and sectionally circular wall portions, said internal shape comprising a substantially linear circular-cylindrical surface, said pipe wall comprising a material selected from the group consisting of synthetic resin and rubber, wherein each of said sectionally rectangular wall portions has a square sectional shape with arcuate corners.
Claim 7
Dependent Claim
31 words
A corrugated pipe as claimed in claim 1, wherein an outer circumferential diameter of each of said sectionally circular wall portions is less than that of said sectionally rectangular wall portions.
Claim 8
Dependent Claim
70 words
A corrugated pipe as claimed in claim 2, wherein each of said sectionally rectangular wall portions includes at least one flat inner side and each of said sectionally circular wall portions includes an inner circumferential surface, wherein said at least one flat inner side of one of said sectionally rectangular wall portions is substantially even to said inner circumferential surface of an adjacent one of said sectionally circular wall portions.
Claim 9
Dependent Claim
16 words
A corrugated pipe as in claim 1, wherein said pipe wall comprises a single, monolithic structure.
Claim 10
Dependent Claim
27 words
A corrugated pipe as in claim 1, wherein said substantially linear circular-cylindrical surface of said internal surface comprises one of an ellipse and an oval in cross-section.
Claim 11
Dependent Claim
41 words
A corrugated pipe as in claim 1, wherein said pipe wall has a thickness, in a direction perpendicular to an axial direction of said pipe, which is greater at said sectionally rectangular wall portions than at said sectionally circular wall portions.
Claim 12
Dependent Claim
45 words
A corrugated pipe as in claim 1, wherein each of said sectionally rectangular wall portions has a length in a first direction parallel to an axial direction of said pipe and each of said sectionally circular wall portions has said length in said first direction.
Claim 13
Dependent Claim
19 words
A corrugated pipe as in claim 1, wherein said substantially linear circular-cylindrical surface comprises a continuous, smooth unbroken surface.
Claim 14
Dependent Claim
22 words
A corrugated pipe as in claim 1, wherein said pipe comprises one of an annularly corrugated pipe and a spirally corrugated pipe.
Claim 15
Dependent Claim
63 words
A corrugated pipe as in claim 1, wherein said pipe comprises a plurality of sections joined by connectors, wherein each of said connectors comprises: a joint contacting said sectionally rectangular wall portions of adjacent ones of said sections; packings positioned between said sectionally circular wall portions and said joint; and a ring positioned between confronting ends of said adjacent ones of said sections.
Claim 16
Dependent Claim
29 words
A corrugated pipe as in claim 1, wherein a length of the sectionally rectangular wall portions is substantially the same as a length of the sectionally circular wall portions.
Claim 17
Dependent Claim
28 words
A corrugated pipe as in claim 1, wherein a length of the sectionally rectangular wall portions is not smaller than a length of the sectionally circular wall portions.
Claim 18
Dependent Claim
23 words
A corrugated pipe as in claim 2, wherein each of said sectionally rectangular wall portions has a square sectional shape with arcuate corners.
Claim 19
Dependent Claim
18 words
A corrugated pipe as in claim 2, wherein said inner pipe has a substantially linear circular-cylindrical outer surface.
Claim 20
Dependent Claim
31 words
A corrugated pipe as in claim 2, wherein said substantially linear circular-cylindrical surface of said inner surface of said inner pipe comprises one of an ellipse and an oval in cross-section.
Claim 21
Dependent Claim
38 words
A corrugated pipe as in claim 2, wherein said outer pipe has a thickness in a first direction perpendicular to an axial direction of said corrugated pipe and said inner pipe has said thickness in said first direction.
Claim 22
Dependent Claim
53 words
A corrugated pipe as in claim 2, wherein each of said sectionally rectangular wall portions of said outer pipe has a length in a first direction parallel to an axial direction of said pipe and each of said sectionally circular wall portions of said outer pipe has said length in said first direction.
Claim 23
Dependent Claim
22 words
A corrugated pipe as in claim 2, wherein said pipe comprises one of an annularly corrugated pipe and a spirally corrugated pipe.
Claim 24
Dependent Claim
71 words
A corrugated pipe as in claim 2, wherein said pipe comprises a plurality of sections joined by connectors, wherein each of said connectors comprises: a joint contacting said sectionally rectangular wall portions of said outer pipe of adjacent ones of said sections; packings positioned between said sectionally circular wall portions of said outer pipe and said joint; and a ring positioned between confronting ends of said adjacent ones of said sections.
Claim 25
Dependent Claim
41 words
A corrugated pipe as in claim 2, wherein said sectionally rectangular wall portions of said outer pipe have an inner surface and said inner pipe has an outer surface connected only to said inner surface of said sectionally rectangular wall portions.
Claim 26
Dependent Claim
29 words
A corrugated pipe as in claim 2, wherein a length of the sectionally rectangular wall portions is substantially the same as a length of the sectionally circular wall portions.
Claim 27
Dependent Claim
28 words
A corrugated pipe as in claim 2, wherein a length of the sectionally rectangular wall portions is not smaller than a length of the sectionally circular wall portions.
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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) | 2001-11-23 | 2002-05-25 | 2002-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-23 | 2006-05-25 | 2006-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-23 | 2010-05-25 | 2010-11-24 | $7700.00 | Window Closed / Lapsed |