US3208757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint for plastic pipe
Assignee: Pyramid Ind Inc
•
Filing: 1963-10-23
•
Granted: 1965-09-28
•
Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Charles R Jageman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:22
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/14; F16L13/16; F16L13/161; F16L37/00; F16L37/02; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A TUBULAR DUCT FORMED OF THERMOPLASTIC MATERIAL WHICH IS GENERALLY RIGID COMPRISING A PLURALITY OF TUBULAR SECTIONS JOINED END TO END BY TELESCOPING BELL AND SPIGOT JOINTS, THE BELL END OF EACH SECTION HAVING AN INSIDE DIAMETER SLIGHTLY GREATER THAN THE OUTSIDE DIAMETER OF SAID SPIGOT END OF AN ADJOINING SECTION AND RECEIVING SAID SPIGOT END, AND A RING HAVING A THICKNESS OF APPROXIMATELY .035 INCH AND MADE OF A MATERIAL HAVING THE PROPERTY OF A MATERIAL TAKEN FROM THE GROUP CONSISTING OF LOW DENSITY POLYETHYLENE AND BUTYL RUBBER, SAID RING BEING DISPOSED AROUND AND EMBEDDED IN SAID SPIGOT END AND RECEIVED BY AND EMBEDDED IN SAID BELL END AND HAVING A THICKNESS GREATER THAN THE CLEARANCE BETWEEN SAID BELL AND SAID SPIGOT ENDS, SAID RING BEING MADE OF HARDER MATERIAL THAN SAID BELL AND SPIGOT ENDS WHEREBY SAID RING IS ADAPTED TO DEFORM THE MATERIAL OF NOTH SAID BELL AND SAID SPIGOT END TO FORM A SEAL THEREBETWEEN, SAID RING BEING GENERALLY CYLINDRICAL AND HAVING A PLURALITY OF AXIALLY SPACED, CIRCUMFERENTIAL RIBS ON THE OUTER PERIPHERY THEREOF AND ON THE INNER PERIPHERY THEREOF.
Claim 2
Dependent Claim
184 words
A TUBULAR DUCT FORMED OF THERMOPLASTIC MATERIAL WHICH IS GENERALLY RIGID COMPRISING A PLURALITY OF TUBULAR SECTIONS JOINED END TO END BY TELESCOPING BELL AND SPIGOT JOINTS, THE BELL END OF EACH SECTION HAVING AN INSIDE DIAMETER SLIGHTLY GREATER THAN THE OUTSIDE DIAMETER OF SAID SPIGOT END OF AN ADJOINING SECTION AND RECEIVING SAID SPIGOT END, AND A RING HAVING A THICKNESS OF APPROXIMATELY .035 INCH AND MADE OF A MATERIAL HAVING THE PROPERTY OF A MATERIAL TAKEN FROM THE GROUP CONSISTING OF LOW DENSITY POLYETHYLENE AND BUTYL RUBBER, SAID RING BEING DISPOSED AROUND AND EMBEDDED IN SAID SPIGOT END AND RECEIVED BY AND EMBEDDED IN SAID BELL END AND HAVING A THICKNESS GREATER THAN THE CLEARANCE BETWEEN SAID BELL AND SAID SPIGOT ENDS, SAID RING BEING MADE OF HARDER MATERIAL THAN SAID BELL AND SPIGOT ENDS WHEREBY SAID RING IS ADAPTED TO DEFORM THE MATERIAL OF NOTH SAID BELL AND SAID SPIGOT END TO FORM A SEAL THEREBETWEEN, SAID RING BEING GENERALLY CYLINDRICAL AND HAVING A PLURALITY OF AXIALLY SPACED, CIRCUMFERENTIAL RIBS ON THE OUTER PERIPHERY THEREOF AND ON THE INNER PERIPHERY THEREOF.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |