US3861152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated drainage pipe with staggered arrangement of plateau recesses
Assignee: Individual
•
Filing: 1973-07-19
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Granted: 1975-01-21
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Expires: 1993-07-19
Abstract
Abstract A resilient plastic drainage pipe of lightweight construction having spaced apart successively arranged annular ribs with interconnecting annular valley portions therebetween defining corrugations along the periphery of the pipe, the ribs being arranged in successive groups with each of the successive groups of ribs having at least several of the ribs interrupted by elongate recessed wall portions positioned at a level intermediate that of the peripheries of the ribs and the valley portions. The elongate recessed wall portions in each group of ribs are arcuately spaced from one another and positioned at three arcuately spaced locations in the lower half of the pipe with drainage holes provided in the elongate recessed wall portions, and with at least one of the elongate recesses in each group being offset longitudinally from an elongate recess in another rib in the group.
Inventors
- 👤 Ernest J Maroschak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:21
CPC Classifications
E; E02; E02B; E02B11/00; E02B11/005; F; F16; F16L; F16L11/00; F16L11/04; F16L11/11; F16L11/118
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
A resilient plastic pipe having spaced apart successive annular ribs with annular valley portions therebetween defining corrugations along the periphery of the pipe, said ribs being arranged in successive groups with each of the successive groups of ribs having at least several ribs in the group interrupted by elongate recessed wall portions positioned at a level intermediate that of the peripheries of said ribs and said valley portions, and wherein the respective elongate recessed wall portions in each group of ribs are arcuately spaced from one another with at least one of the elongate recessed wall portions being offset longitudinally of the pipe from an elongate recessed wall portion in another rib of the group.
Claim 2
Dependent Claim
115 words
A resilient plastic pipe having spaced apart successive annular ribs with annular valley portions therebetween defining corrugations along the periphery of the pipe, said ribs being arranged in successive groups with each of the successive groups of ribs having at least several ribs in the group interrupted by elongate recessed wall portions positioned at a level intermediate that of the peripheries of said ribs and said valley portions, and wherein the respective elongate recessed wall portions in each group of ribs are arcuately spaced from one another with at least one of the elongate recessed wall portions being offset longitudinally of the pipe from an elongate recessed wall portion in another rib of the group.
Claim 3
Dependent Claim
38 words
A resilient plastic pipe according to claim 1, wherein drainage holes are provided in the elongate recessed wall portions in each group of ribs with the diameter of the holes being greater than the width of the ribs.
Claim 4
Dependent Claim
31 words
A resilient plastic pipe according to claim 1, wherein side walls extend radially inwardly from opposite sides of said elongate recessed wall portions and interconnect the same with said valley portions.
Claim 5
Dependent Claim
23 words
A resilient plastic pipe according to claim 1 wherein at least one uninterrupted rib is positioned between adjacent interrupted ribs throughout the pipe.
Claim 6
Dependent Claim
30 words
A resilient plastic pipe according to claim 1, wherein the respective elongate recessed wall portions in each group of ribs are each offset longitudinally of the pipe from one another.
Claim 7
Dependent Claim
52 words
A resilient plastic pipe according to claim 1 wherein two of the elongate recessed wall portions in each group of ribs are located in a common interrupted rib and wherein the remaining elongate recessed wall portion in each group of ribs are offset longitudinally of the pipe from said common interrupted rib.
Claim 8
Dependent Claim
154 words
A resilient plastic pipe having spaced apart successive annular ribs with annular valley portions therebetween defining corrugations along the periphery of the pipe, said ribs being arranged in successive groups with each of the successive groups of ribs having at least several ribs in the group interrupted by arcuately elongate recessed wall portions positioned at a level intermediate that of the peripheries of said ribs and said valley portions, the elongate recessed wall portions in each group of ribs being three in number and being arcuately spaced apart from each other at three arcuate locations in the lower half of the pipe, and with the elongate recessed wall portions in adjacent groups of ribs being positioned in similar arcuate locations, and wherein at least one of the elongate recessed wall portions in each group of ribs is offset longitudinally of the pipe from an elongate recessed wall portion in another rib of the group.
Claim 9
Dependent Claim
154 words
A resilient plastic pipe having spaced apart successive annular ribs with annular valley portions therebetween defining corrugations along the periphery of the pipe, said ribs being arranged in successive groups with each of the successive groups of ribs having at least several ribs in the group interrupted by arcuately elongate recessed wall portions positioned at a level intermediate that of the peripheries of said ribs and said valley portions, the elongate recessed wall portions in each group of ribs being three in number and being arcuately spaced apart from each other at three arcuate locations in the lower half of the pipe, and with the elongate recessed wall portions in adjacent groups of ribs being positioned in similar arcuate locations, and wherein at least one of the elongate recessed wall portions in each group of ribs is offset longitudinally of the pipe from an elongate recessed wall portion in another rib of the group.
Claim 10
Dependent Claim
43 words
A resilient plastic pipe according to claim 7, wherein a drainage hole is provided in each of the three arcuately spaced recessed wall portions in each group of ribs with the diameter of the holes being greater than the width of the ribs.
Claim 11
Dependent Claim
103 words
A resilient plastic pipe according to claim 8, wHerein the drainage holes in each group of ribs are arcuately spaced from each other about 60 degrees apart, and wherein sight means is provided on the outer surface of said pipe extending longitudinally thereof and located in diametrically opposed relation to the middle location of the arcuately spaced drainage holes in the pipe, said sight means being thereby adapted for visually aiding in installing the pipe in the ground with all of the drainage holes located below the horizontal center line of the pipe and with the middle drainage holes occupying the lowermost position.
Claim 12
Dependent Claim
62 words
A resilient plastic pipe according to claim 7, wherein each group of ribs includes three interrupted ribs with an uninterrupted rib being provided between adjacent interrupted ribs, and wherein each of the three interrupted ribs has one of said elongate recessed wall portions provided therein with said recessed wall portions being located respectively at said three different arcuate locations on the pipe.
Claim 13
Dependent Claim
85 words
A resilient plastic pipe according to claim 7, wherein each group of ribs includes two longitudinally spaced interrupted ribs with a pair of uninterrupted ribs being provided therebetween, and wherein two of the elongate recessed wall portions in each group of ribs are positioned in a common interrupted rib in arcuately spaced relation in the outermost of said three arcuate locations, with the third elongate recessed wall portion being positioned in the other interrupted rib and located in the middle of said three arcuate locations.
References Cited (Backward Citations)
US3747352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |