Patent US3420928A successfully refreshed from Google Patents.
US3420928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing seals
Assignee: Otis Engineering Corp
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Filing: 1966-07-15
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Granted: 1969-01-07
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Expires: 1986-07-15
Abstract
No abstract record available.
Inventors
- 👤 Norman F Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:39
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/127; E21B23/00; E21B23/08; E21B23/10; Y; Y10; Y10S; Y10S425/00; Y10S425/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
THE METHOD OF PRODUCING A SEAL HAVING A CLOSED RING OF PIVOTALLY CONNECTED SEGMENTS DISPOSED ABOUT AND EMBEDDED IN A RESILIENT ANNULAR BODY, SAID METHOD INCLUDING: CONNECTING A PLURALITY OF THE SEGMENTS TO FORM A CLOSED RING OF PREDETERMINED DIAMETER; FILLING OUTER PORTIONS OF INTERSTICES BETWEEN ADJACENT SEGMENTS WITH A FILLER SUBSTANCE BY CENTRIFUGAL FORCE TO FORM A RIGID ANNULAR BAND WITH THE FILLER SUBSTANCE COVERING AND SHIELDING RADIAL OUTER PORTIONS OF THE LONGITUDINAL SIDE SURFACES OF THE SEGMENTS, BONDING AN ANNULAR RESILIENT BODY TO INTERNAL SURFACES OF SAID RIGID BAND WITH OUTER PORTIONS OF THE RESILIENT BODY EXTENDING INTO THE INTERSTICES BETWEEN ADJACENT SEGMENTS TO THE INTERNAL SURFACES OF THE FILLER SUBSTANCE; AND REMOVING THE FILLER SUBSTANCE TO FREE THE SEGMENTS FOR PIVOTAL MOVEMENT RELATIVE TO ONE ANOTHER WHEREBY SAID SEAL IS FREED TO EXPAND AND CONTRACT RADIALLY.
Claim 2
Independent Claim
139 words
THE METHOD OF PRODUCING A SEAL HAVING A CLOSED RING OF PIVOTALLY CONNECTED SEGMENTS DISPOSED ABOUT AND EMBEDDED IN A RESILIENT ANNULAR BODY, SAID METHOD INCLUDING: CONNECTING A PLURALITY OF THE SEGMENTS TO FORM A CLOSED RING OF PREDETERMINED DIAMETER; FILLING OUTER PORTIONS OF INTERSTICES BETWEEN ADJACENT SEGMENTS WITH A FILLER SUBSTANCE BY CENTRIFUGAL FORCE TO FORM A RIGID ANNULAR BAND WITH THE FILLER SUBSTANCE COVERING AND SHIELDING RADIAL OUTER PORTIONS OF THE LONGITUDINAL SIDE SURFACES OF THE SEGMENTS, BONDING AN ANNULAR RESILIENT BODY TO INTERNAL SURFACES OF SAID RIGID BAND WITH OUTER PORTIONS OF THE RESILIENT BODY EXTENDING INTO THE INTERSTICES BETWEEN ADJACENT SEGMENTS TO THE INTERNAL SURFACES OF THE FILLER SUBSTANCE; AND REMOVING THE FILLER SUBSTANCE TO FREE THE SEGMENTS FOR PIVOTAL MOVEMENT RELATIVE TO ONE ANOTHER WHEREBY SAID SEAL IS FREED TO EXPAND AND CONTRACT RADIALLY.
References Cited (Backward Citations)
US843352A
Cited
US1090533A
Cited
US1360165A
Cited
US1949135A
Cited
US2833009A
Cited
US3066387A
Cited
DE1135162B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |