Patent US4870442A successfully refreshed from Google Patents.
Patent US3280812A successfully refreshed from Google Patents.
US3280812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication of the gastight radial scrapers in rotary engines
Assignee: —
•
Filing: —
•
Granted: 1966-10-25
•
Expires: 1983-10-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:46
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/02; F01C; F01C1/00; F01C1/30; F01C1/34; F01C1/344; F01C1/3446
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN A ROTARY ENGINE OF THE TYPE HAVING A LOBED STATOR, A CRANKSHAFT, AND A ROTOR MOUNTED ON SAID CRANKSHAFT AND SO SHAPED SO AS TO DEFINE WITH SAID STATOR A PLURALITY OF CHAMBERS ON EACH CRANKSHAFT REVOLUTION; AN IMPROVEMENT COMPRISING A PLURALITY OF RADIAL SCRAPERS CARRIED BY SAID ROTOR AND ADAPTED TO ENGAGE THE INNER SURFACE OF CERTAIN PORTIONS OF SAID STATOR TO DEFINE SAID CHAMBERS, A FIRST OIL PASSAGE FORMED IN AT LEAST ONE OF SAID PORTIONS OF SAID STATOR, A SECOND OIL PASSAGE FORMED IN SAID CRANKSHAFT WEBS, AND A THIRD OIL PASSAGE FORMED IN SAID CRANKSHFT AND COMMUNICATING WITH AN EXTERNAL OIL SOURCE, THE RELATIVE LOCATIONS OF SAID PASSAGES BEING SO THAT, AT EACH CRANKSHAFT REVOLUTION, SAID PASSAGES REGISTER TO LUBRICATE A SCRAPER ADJACENT THE PORTION OF SAID STATOR WHERE SAID FIRST OIL PASSAGE IS FORMED.
Claim 2
Dependent Claim
140 words
IN A ROTARY ENGINE OF THE TYPE HAVING A LOBED STATOR, A CRANKSHAFT, AND A ROTOR MOUNTED ON SAID CRANKSHAFT AND SO SHAPED SO AS TO DEFINE WITH SAID STATOR A PLURALITY OF CHAMBERS ON EACH CRANKSHAFT REVOLUTION; AN IMPROVEMENT COMPRISING A PLURALITY OF RADIAL SCRAPERS CARRIED BY SAID ROTOR AND ADAPTED TO ENGAGE THE INNER SURFACE OF CERTAIN PORTIONS OF SAID STATOR TO DEFINE SAID CHAMBERS, A FIRST OIL PASSAGE FORMED IN AT LEAST ONE OF SAID PORTIONS OF SAID STATOR, A SECOND OIL PASSAGE FORMED IN SAID CRANKSHAFT WEBS, AND A THIRD OIL PASSAGE FORMED IN SAID CRANKSHFT AND COMMUNICATING WITH AN EXTERNAL OIL SOURCE, THE RELATIVE LOCATIONS OF SAID PASSAGES BEING SO THAT, AT EACH CRANKSHAFT REVOLUTION, SAID PASSAGES REGISTER TO LUBRICATE A SCRAPER ADJACENT THE PORTION OF SAID STATOR WHERE SAID FIRST OIL PASSAGE IS FORMED.
References Cited (Backward Citations)
US2981371A
Cited
US3213837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |