Patent US3254869A successfully refreshed from Google Patents.
US3254869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valving device for a flexible pleated conduit
Assignee: Individual
•
Filing: 1962-04-11
•
Granted: 1966-06-07
•
Expires: 1982-04-11
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Easey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:47
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/22; A61M39/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A FLUID FLOW CONTROL DEVICE COMPRISING, A CONDUIT HAVING A WALL PROVIDED WITH AN ANNULAR SERIES OF LONGITUDINALLY DIRECTED TAPERED FLEXIBLE PLEATS BIASED TO OPEN THE PASSAGE THROUGH THE CONDUIT WHEN RELEASED FROM EXTERNAL PRESSURE, THE EXTERNAL FOLDED EDGES OF SAID PLEATS BEING THE SERRATIONS OF THE PLEAT EDGES AND MOVABLE THEREALONG UPON ROTATION TO COLLAPSE THE PLEATS AND CLOSE SAID PASSAGE, THE DEGREE OF SAID OPENING BEING PROPORTIONAL TO THE EXTENT OF THE MOVEMENT OF SAID INTERNALLY THREADED MEANS ALONG THE CONDUIT.
Claim 2
Dependent Claim
83 words
A FLUID FLOW CONTROL DEVICE COMPRISING, A CONDUIT HAVING A WALL PROVIDED WITH AN ANNULAR SERIES OF LONGITUDINALLY DIRECTED TAPERED FLEXIBLE PLEATS BIASED TO OPEN THE PASSAGE THROUGH THE CONDUIT WHEN RELEASED FROM EXTERNAL PRESSURE, THE EXTERNAL FOLDED EDGES OF SAID PLEATS BEING THE SERRATIONS OF THE PLEAT EDGES AND MOVABLE THEREALONG UPON ROTATION TO COLLAPSE THE PLEATS AND CLOSE SAID PASSAGE, THE DEGREE OF SAID OPENING BEING PROPORTIONAL TO THE EXTENT OF THE MOVEMENT OF SAID INTERNALLY THREADED MEANS ALONG THE CONDUIT.
References Cited (Backward Citations)
US68712A
Cited
US1264479A
Cited
US1865012A
Cited
US2135237A
Cited
US2338759A
Cited
US2573712A
Cited
US2593420A
Cited
US2640675A
Cited
US2748666A
Cited
US2901152A
Cited
US2978866A
Cited
US3102710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |