Patent US3403701A successfully refreshed from Google Patents.
US3403701A
Expired / Lapsed
US
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Pressure sealing pipe line pig
Assignee: Individual
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Filing: 1966-12-27
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Granted: 1968-10-01
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Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 Mary M Knapp
- 👤 Harry J Girard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:30
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0553; F; F16; F16L; F16L2101/00; F16L2101/40; Y; Y10; Y10T; Y10T137/00; Y10T137/4891; Y10T137/9682
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A PIPE LINE SWIPE ADAPTED TO BE PROPELLED THROUGH A PIPE BY A PRESSURE GRADIENT AN ELONGATED BODY OF CYLINDRICAL SHAPE FORMED OF RESILIENT MATERIAL HAVING A LONGITUDINALLY OUTWARDLY OPENING END CAVITY FORMING A FLEXIBLE, ANNULAR LIP PORTION WHOSE EXTERNAL PERIPHERAL SURFACE IS POSITIONED TO BE EXPANDED INTO SEALING ENGAGEMENT WITH THE SURROUNDING INTERNAL SURFACE OF THE PIPE BY THE APPLICATION OF THE PRESSURE OF FLUID IN THE PIPE AGAINST THE INTERNAL SURFACE OF THE CAVITY WHEN THE SWIPE IS IN THE PIPE, SAID EXTERNAL PERIPHERAL SURFACE OF SAID LIP PORTION BEING CURVED RADIALLY INWARDLY LONGITUDINALLY OF SAID BODY.
Claim 2
Dependent Claim
100 words
IN A PIPE LINE SWIPE ADAPTED TO BE PROPELLED THROUGH A PIPE BY A PRESSURE GRADIENT AN ELONGATED BODY OF CYLINDRICAL SHAPE FORMED OF RESILIENT MATERIAL HAVING A LONGITUDINALLY OUTWARDLY OPENING END CAVITY FORMING A FLEXIBLE, ANNULAR LIP PORTION WHOSE EXTERNAL PERIPHERAL SURFACE IS POSITIONED TO BE EXPANDED INTO SEALING ENGAGEMENT WITH THE SURROUNDING INTERNAL SURFACE OF THE PIPE BY THE APPLICATION OF THE PRESSURE OF FLUID IN THE PIPE AGAINST THE INTERNAL SURFACE OF THE CAVITY WHEN THE SWIPE IS IN THE PIPE, SAID EXTERNAL PERIPHERAL SURFACE OF SAID LIP PORTION BEING CURVED RADIALLY INWARDLY LONGITUDINALLY OF SAID BODY.
References Cited (Backward Citations)
US1803126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |