US3153454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitch changing mechanism
Assignee: RTX Corp
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Filing: 1963-04-29
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Granted: 1964-10-20
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Expires: 1983-04-29
Abstract
No abstract record available.
Inventors
- 👤 Leonard L Gaubis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:54
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A VARIABLE PITCH, VARIABLE EFFECTIVE CAMBER PROPELLER COMPRISING TWO BANKS OF AXIALLY SPACED BLADES MOUNTED FOR PITCH CHANGING MOVEMENTS IN A HUB IN RELATIVELY FIXED HUB ARMS, A SINGLE SLEEVE IN SAID HUB HAVING A SEPARATE CAM TRACK FOR EACH BLADE, A CAM FOLLOWER IN EACH CAM TRACK ONE SAID FOLLOWER FOR EACH BLADE, EACH FOLLOWER CONNECTED WITH ITS RESPECTIVE BLADE, MEANS CONNECTING SAID HUB WITH SAID SLEEVE TO LIMIT ROTATION OF SAID SLEEVE IN SAID HUB, A PISTON IN SAID HUB AND IN SAID SLEEVE, MEANS CONNECTING SAID PISTON WITH SAID SLEEVE FOR AXIALLY TRANSLATING SAID SLEEVE WITH RESPECT TO SAID HUB AND BLADES, SAID
Claim 2
Dependent Claim
106 words
A VARIABLE PITCH, VARIABLE EFFECTIVE CAMBER PROPELLER COMPRISING TWO BANKS OF AXIALLY SPACED BLADES MOUNTED FOR PITCH CHANGING MOVEMENTS IN A HUB IN RELATIVELY FIXED HUB ARMS, A SINGLE SLEEVE IN SAID HUB HAVING A SEPARATE CAM TRACK FOR EACH BLADE, A CAM FOLLOWER IN EACH CAM TRACK ONE SAID FOLLOWER FOR EACH BLADE, EACH FOLLOWER CONNECTED WITH ITS RESPECTIVE BLADE, MEANS CONNECTING SAID HUB WITH SAID SLEEVE TO LIMIT ROTATION OF SAID SLEEVE IN SAID HUB, A PISTON IN SAID HUB AND IN SAID SLEEVE, MEANS CONNECTING SAID PISTON WITH SAID SLEEVE FOR AXIALLY TRANSLATING SAID SLEEVE WITH RESPECT TO SAID HUB AND BLADES, SAID
References Cited (Backward Citations)
US807498A
Cited
US2215564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |