Patent US3929359A successfully refreshed from Google Patents.
US3929359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connecting joint structure for corrugated plastic tubing
Assignee: National City Bank
•
Filing: 1974-11-04
•
Granted: 1975-12-30
•
Expires: 1994-11-04
Abstract
Abstract The specification and drawings disclose a connecting joint construction particularly suited for use on large diameter corrugated plastic piping. In the embodiment illustrated, the joint is made up of a first main length of corrugated, generally cylindrical plastic pipe having one end portion provided with corrugations which, considered from the interior of the pipe, are somewhat smaller in height than the corrugations of the main body portion of the pipe. The smaller corrugations have a plurality of sets of axially aligned grooves formed therein. A second main length of pipe is provided with a smooth walled end portion of a diameter less than the minimum internal diameter of the end portion of the first pipe. Cleats extend outwardly from the smooth diameter end portion and are sized so that they can be slid longitudinally into the grooves in the first pipe and rotated into a corrugation to lock the two pipe sections together. The joint structure is designed such that the minimum flow area through the joint is not substantially less than the minimum flow area through the remainder of the pipe. Additionally, the overall outer diameter of the joint is substantially equal to the outer diameter of the remaining sections of the pipe.
Inventors
- 👤 John D Schmunk
- 👤 Jr James L Child
- 👤 Robert E Shroy
- 👤 John Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:39
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/0036; F16L25/0063; E; E02; E02B; E02B11/00; E02B11/005; E03; E03F; E03F3/00; E03F3/04; F16L11/00; F16L11/04; F16L11/11; F16L11/118; F16L25/0045; F16L37/00; F16L37/24; F16L37/244; F16L37/252; F16L9/00; F16L9/12; F16L9/127; Y; Y10; Y10S; Y10S285/00; Y10S285/903
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
288 words
A joint construction for plastic pipe comprising: a first main length of corrugated, hollow and generally cylindrical plastic pipe having an internal wall surface defined by adjacent circumferentially extending, longitudinally spaced peaks and valleys; the internal diameter of said first length measured diametrically between opposite peaks being equal to d, and the internal diameter measured diametrically between opposite valleys being equal to D, with D being substantially greater than d; said first length including a first portion which defines an end of said length and having an internal diameter j measured diametrically between opposed peaks which is greater than d but less than D, and a maximum internal diameter measured diametrically between opposed valleys which is substantially equal to D, and a plurality of sets of longitudinally aligned grooves formed in at least the two peaks adjacent the outer end of said first portion; a second main length of hollow plastic pipe having a generally cylindrical corrugated portion and a smoothwalled cylindrical second portion which defines an end of said second length and has an outer diameter which is slightly less than j but greater than d and an inner diameter J which is substantially equal to d; and, cleat members extending outwardly from the outer surface of said second portion of said second length, said cleats having a configuration and location to permit them to move longitudinally into the aligned grooves in the first portion of said first length, the portion of said second length being received in said first portion of said first length with the cleats of said second portion of said second length being located in valleys of the first portion of said first length and in a non-aligned position relative to said grooves.
Claim 2
Dependent Claim
288 words
A joint construction for plastic pipe comprising: a first main length of corrugated, hollow and generally cylindrical plastic pipe having an internal wall surface defined by adjacent circumferentially extending, longitudinally spaced peaks and valleys; the internal diameter of said first length measured diametrically between opposite peaks being equal to d, and the internal diameter measured diametrically between opposite valleys being equal to D, with D being substantially greater than d; said first length including a first portion which defines an end of said length and having an internal diameter j measured diametrically between opposed peaks which is greater than d but less than D, and a maximum internal diameter measured diametrically between opposed valleys which is substantially equal to D, and a plurality of sets of longitudinally aligned grooves formed in at least the two peaks adjacent the outer end of said first portion; a second main length of hollow plastic pipe having a generally cylindrical corrugated portion and a smoothwalled cylindrical second portion which defines an end of said second length and has an outer diameter which is slightly less than j but greater than d and an inner diameter J which is substantially equal to d; and, cleat members extending outwardly from the outer surface of said second portion of said second length, said cleats having a configuration and location to permit them to move longitudinally into the aligned grooves in the first portion of said first length, the portion of said second length being received in said first portion of said first length with the cleats of said second portion of said second length being located in valleys of the first portion of said first length and in a non-aligned position relative to said grooves.
Claim 3
Dependent Claim
46 words
The joint construction as defined in claim 1 wherein the wall thickness of said first portion is greater than the wall thickness of said first main length and the wall thickness of said second portion is greater than the wall thickness of said second main length.
Claim 4
Dependent Claim
21 words
The joint construction as defined in claim 1 wherein said first portion of said first length includes at least three corrugations.
Claim 5
Dependent Claim
30 words
The joint construction as defined in claim 1 wherein said cleats are all spaced inwardly a uniform distance from the outer end of said second portion of the second length.
Claim 6
Dependent Claim
67 words
The joint construction as defined in claim 1 wherein said cleats are defined by first and second surfaces with said first surface being inclined and facing in the direction of the outer end of the second portion of said second length and said second surface being generally perpendicular to the wall of said second portion of said second length and joining said first surface at an apex.
Claim 7
Dependent Claim
18 words
The joint construction as defined in claim 1 wherein said cleats are located at relatively uniform circumferential spacings.
Claim 8
Dependent Claim
34 words
The joint construction as defined in claim 1 including stop members located in valleys of the first portion of said first length to limit the rotational movement of said cleat members and said valleys.
Claim 9
Dependent Claim
17 words
The invention as defined in claim 7 wherein said stop members are positioned closely adjacent said grooves.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |