Patent US3171587A successfully refreshed from Google Patents.
US3171587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing structures
Assignee: Audi AG
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Filing: 1962-01-12
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Granted: 1965-03-02
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Expires: 1982-01-12
Abstract
No abstract record available.
Inventors
- 👤 Schaller Ulrich
- 👤 Paschke Hanns-Dieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:19
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/02; F01C19/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
IN A ROTARY MECHANISM OF THE KIND HAVING AN OUTER BODY HAVING AXIALLY-SPACED END WALLS AND A PERIPHERAL WALL INTERCONNECTING THE END WALLS TO FORM A CAVITY HAVING A LONGITUDINAL AXIS, AN INNER BODY DISPOSED WITHIN SAID CAVITY AND ROTATABLE RELEATIVE TO SAID OUTER BODY ABOUT AN AXIS SPACED FROM BUT PARALLEL TO SAID CAVITY AXIS, THE D INNER SURFACE OF SAID PERIPHERAL WALL HAVING MULTILOBED PROFILE WHICH IS BASICALLY EPITROCHOIDAL, SAID INNER BODY HAVING END FACES PARALLEL TO SAID END WALLS AND HAVING A PERIPHERAL SURFACE WITH A PLURALITY OF CIRCUMFERENTIALLYSPACED APEX PORTIONS AND HAVING AT EACH APEX A SLOT RUNNING BETWEEN SAID END FACES AND DEFINED BY A PAIR OF GENERALLY RADIAL SIDE WALLS, AN APEX SEAL STRIP MEMBER DISPOSED IN EACH SLOT WITH PLAY IN THE AXIAL AND CIRCUMFERENTIAL DIRECTIONS AND ENGAGING THE MULTI-LOBED INNER SURFACE OF SAID PERIPHERAL WALL AND SAID END WALLS IN SEALING RELATION TO FORM A PLURALITY OF WORKING CHAMBERS BETWEEN THE TWO BODIES WHICH VARY IN VOLUME ON RELATIVE ROTATION THEREOF, DIFFERENT RESPECTIVE WORKING-FLUID PRESSURES ALTERNATELY PREVAILING IN SAID WORKING CHAMBERS: THE IMPROVEMENT COMPRISING THE COMBINATION OF SAID INNER BODY AND SEALS STRIPS WHEREIN EACH SEAL STRIP HAS A
Claim 2
Dependent Claim
197 words
IN A ROTARY MECHANISM OF THE KIND HAVING AN OUTER BODY HAVING AXIALLY-SPACED END WALLS AND A PERIPHERAL WALL INTERCONNECTING THE END WALLS TO FORM A CAVITY HAVING A LONGITUDINAL AXIS, AN INNER BODY DISPOSED WITHIN SAID CAVITY AND ROTATABLE RELEATIVE TO SAID OUTER BODY ABOUT AN AXIS SPACED FROM BUT PARALLEL TO SAID CAVITY AXIS, THE D INNER SURFACE OF SAID PERIPHERAL WALL HAVING MULTILOBED PROFILE WHICH IS BASICALLY EPITROCHOIDAL, SAID INNER BODY HAVING END FACES PARALLEL TO SAID END WALLS AND HAVING A PERIPHERAL SURFACE WITH A PLURALITY OF CIRCUMFERENTIALLYSPACED APEX PORTIONS AND HAVING AT EACH APEX A SLOT RUNNING BETWEEN SAID END FACES AND DEFINED BY A PAIR OF GENERALLY RADIAL SIDE WALLS, AN APEX SEAL STRIP MEMBER DISPOSED IN EACH SLOT WITH PLAY IN THE AXIAL AND CIRCUMFERENTIAL DIRECTIONS AND ENGAGING THE MULTI-LOBED INNER SURFACE OF SAID PERIPHERAL WALL AND SAID END WALLS IN SEALING RELATION TO FORM A PLURALITY OF WORKING CHAMBERS BETWEEN THE TWO BODIES WHICH VARY IN VOLUME ON RELATIVE ROTATION THEREOF, DIFFERENT RESPECTIVE WORKING-FLUID PRESSURES ALTERNATELY PREVAILING IN SAID WORKING CHAMBERS: THE IMPROVEMENT COMPRISING THE COMBINATION OF SAID INNER BODY AND SEALS STRIPS WHEREIN EACH SEAL STRIP HAS A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |