US4134268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drainage field pipe
Assignee: Individual
•
Filing: 1977-10-06
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Granted: 1979-01-16
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Expires: 1997-10-06
Abstract
Abstract An improved drainage field pipe is disclosed which is a cylindrical tube of substantially circular cross section composed of an organic polymer material, having a principal axis slightly inclined with respect to the horizontal, for conducting a fluid slurry containing solid particles from a source connected to the inlet thereof, to be dispersed along the lower side of the tube into a subterranean drainage trench lined with crushed rock. A plurality of slots perforate the tube along the lower side thereof, with each slot having its length dimension greater than its width dimension. The slots allow the solid particles from the fluid slurry to pass out of the tube into the drainage trench while preventing the crushed rock from passing from the drainage trench into the tube.
Inventors
- 👤 John E. Elmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
E; E02; E02B; E02B11/00; E02B11/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
178 words
An improved drainage field pipe, comprising: a cylindrical tube of substantially circular cross section having a principal axis slightly inclined with respect to the horizontal, an inlet end, an outlet end, an upper side and a lower side, for conducting a fluid slurry containing solid particles from a source connected to said inlet end, to be dispersed along said lower side into a subterranean drainage trench lined with crushed rock; a plurality of slots through said tube distributed along said lower side thereof, each having their length dimension perpendicular to said principal axis and greater than their width dimension, said width dimension being approximately one inch, said length dimension lying along a circular arc on said lower side of said tube, intersecting an angle from said principal axis of less than but approximately equal to 180°; whereby said slots allow said solid particles from said fluid slurry to pass out of said tube into said drainage trench while preventing said crushed rock from passing from said drainage trench into said tube while said tube retains its structural strength.
Claim 2
Dependent Claim
178 words
An improved drainage field pipe, comprising: a cylindrical tube of substantially circular cross section having a principal axis slightly inclined with respect to the horizontal, an inlet end, an outlet end, an upper side and a lower side, for conducting a fluid slurry containing solid particles from a source connected to said inlet end, to be dispersed along said lower side into a subterranean drainage trench lined with crushed rock; a plurality of slots through said tube distributed along said lower side thereof, each having their length dimension perpendicular to said principal axis and greater than their width dimension, said width dimension being approximately one inch, said length dimension lying along a circular arc on said lower side of said tube, intersecting an angle from said principal axis of less than but approximately equal to 180°; whereby said slots allow said solid particles from said fluid slurry to pass out of said tube into said drainage trench while preventing said crushed rock from passing from said drainage trench into said tube while said tube retains its structural strength.
Claim 3
Dependent Claim
18 words
The improved drainage field pipe of claim 1, wherein said tube is composed of an organic polymer material.
Claim 4
Dependent Claim
48 words
The improved drainage field pipe of claim 2, wherein said organic polymer material is selected from the group consisting of a fluorocarbon resin, a polyamide resin, a polycarbonate resin, polyethylene, a polyester resin, a polyimide resin, polypropylene, a polystyrene resin, a polyurethane resin, a polyvinyl resin and rubber.
Claim 5
Dependent Claim
24 words
The improved drainage field pipe of claim 2, wherein said organic polymer material is selected from the group consisting of acrylonitrile-butadiene-styrene and polyvinyl chloride.
References Cited (Backward Citations)
GB189815555A
Cited
US2436630A
Cited
CH406990A
Cited
US3374634A
Cited
US3753352A
Cited
US4061272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |