Patent US941016A successfully refreshed from Google Patents.
Patent US3258995A successfully refreshed from Google Patents.
US3258995A
Expired / Lapsed
US
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Compound planetary speed reducer
Assignee: Curtiss Wright Corp
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Filing: 1963-06-12
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Granted: 1966-07-05
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Expires: 1983-06-12
Abstract
No abstract record available.
Inventors
- 👤 Raymur B Bennett
- 👤 Maurice E Cushman
- 👤 Tofa W Khiralla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:43
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/28; F16H1/2809; F16H57/00; F16H57/02; F16H57/02004; F16H2001/2872
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A SPEED CHANGER COMPRISING A FIXED SHAFT; A PAIR OF COAXIAL INTERNALLY TOOTHED SUBSTANTIALLY IDENTICAL RING GEARS HAVING CORRESPONDING OPENINGS IN THEIR END FACES, SAID RING GEARS BEING SPACED ALONG AND SECURED ON THE FIXED SHAFT; A PLURALITY OF COMPOUND PLANETARY MEMBERS, EACH HAVING ONE TOOTHED PORTION IN ENGAGEMENT WITH THE TOOTHED PORTION OF ONE OF THE PAIR OF INTERNAL RING GEARS AND HAVING A SECOND TOOTHED PORTION IN ENGAGEMENT WITH THE TOOTHED PORTION OF THE OTHER OF SAID PAIR OF INTERNAL RING GEARS, EACH OF SAID PLANETARY MEMBERS ALSO INCLUDING A THIRD TOOTHED PORTION BETWEEN THE OTHER TOOTH PORTIONS THEREON; A THIRD RING GEAR COAXIAL WITH SAID PAIR OF RING GEARS AND HAVING AN INTERNAL TOOTH PORTION IN ENGAGEMENT WITH THE SAID THIRD TOOTHED PORTION ON EACH PLANETARY MEMBER; AN OUTPUT SHAFT: A DRIVING CONNECTION BETWEEN THE OUTPUT SHAFT AND SAID THIRD RING GEAR; A SUN GEAR COAXIAL WITH THE RING GEARS, ROTATABLE ABOUT THE AXIS OF SAID FIXED SHAFT AND IN ENGAGEMENT WITH THE THIRD TOOTHED PORTION OF EACH PLANETARY MEMBER; AN INPUT SHAFT; AND A DRIVING CONNECTION EXTENDING FROM SAID INPUT SHAFT AND THROUGH AN OPENING IN ONE OF THE SAID PAIR OF RING GEARS TO THE SUN GEAR.
Claim 2
Dependent Claim
202 words
A SPEED CHANGER COMPRISING A FIXED SHAFT; A PAIR OF COAXIAL INTERNALLY TOOTHED SUBSTANTIALLY IDENTICAL RING GEARS HAVING CORRESPONDING OPENINGS IN THEIR END FACES, SAID RING GEARS BEING SPACED ALONG AND SECURED ON THE FIXED SHAFT; A PLURALITY OF COMPOUND PLANETARY MEMBERS, EACH HAVING ONE TOOTHED PORTION IN ENGAGEMENT WITH THE TOOTHED PORTION OF ONE OF THE PAIR OF INTERNAL RING GEARS AND HAVING A SECOND TOOTHED PORTION IN ENGAGEMENT WITH THE TOOTHED PORTION OF THE OTHER OF SAID PAIR OF INTERNAL RING GEARS, EACH OF SAID PLANETARY MEMBERS ALSO INCLUDING A THIRD TOOTHED PORTION BETWEEN THE OTHER TOOTH PORTIONS THEREON; A THIRD RING GEAR COAXIAL WITH SAID PAIR OF RING GEARS AND HAVING AN INTERNAL TOOTH PORTION IN ENGAGEMENT WITH THE SAID THIRD TOOTHED PORTION ON EACH PLANETARY MEMBER; AN OUTPUT SHAFT: A DRIVING CONNECTION BETWEEN THE OUTPUT SHAFT AND SAID THIRD RING GEAR; A SUN GEAR COAXIAL WITH THE RING GEARS, ROTATABLE ABOUT THE AXIS OF SAID FIXED SHAFT AND IN ENGAGEMENT WITH THE THIRD TOOTHED PORTION OF EACH PLANETARY MEMBER; AN INPUT SHAFT; AND A DRIVING CONNECTION EXTENDING FROM SAID INPUT SHAFT AND THROUGH AN OPENING IN ONE OF THE SAID PAIR OF RING GEARS TO THE SUN GEAR.
References Cited (Backward Citations)
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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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |