Patent US3228480A successfully refreshed from Google Patents.
US3228480A
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Adjusting device for adjusting the pitch of propeller blades
Assignee: HUNDESTED MOTORFABRIK AS
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Filing: 1962-11-09
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Granted: 1966-01-11
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Expires: 1982-11-09
Abstract
No abstract record available.
Inventors
- 👤 Jorgensen Anders Julius Oluf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:55
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34; F04D29/36; F04D29/362; B; B63; B63H; B63H3/00; B63H3/06; B63H3/08; B63H3/081; B63H3/082; B63H2003/088
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
151 words
IN AN ADJUSTING DEVICE FOR ADJUSTING THE PITCH OF PROPELLER BLADES; A ROTATABLE PROPELLER SHAFT HAVING A HOLLOW SHAFT PORTION AT LEAST AT ONE END THEREOF; A PROPELLER HUB SUPPORTED ON SAID SHAFT AND INCLUDING ADJUSTABLE BLADES; AN ADJUSTING ROD SLIDABLY MOUNTED WITHIN SAID HOLLOW PROPELLER SHAFT PORTION AND OPERABLY CONNECTED TO SAID BLADES; A CLUTCH MEMBER SLIDABLY MOUNTED ON SAID SHAFT FOR ROTATING THEREWITH CONNECTING MEANS FIRMLY INTERCONNECTING SAID CLUTCH MEMBER AND SAID ADJUSTING ROD; A SERVO-CYLINDER SURROUNDING SAID SHAFT AND SLIDABLY MOUNTED ON SAID SHAFT FOR ROTATING THERWITH; AN ANNULAR SERVO-PISTON ARRANGED WITHIN SAID SERVO-CYLINDER SURROUNDING SAID SHAFT AND SECURED THERETO; SAID SERVO-CYLINDER HAVING A CYLINDER CHAMBER AT EACH SIDE OF SAID SERVO-PISTON; A SLIDE-VALVE DEVICE ADAPTED TO CONTROL THE COMMUNICATION BETWEEN SAID TWO CHAMBERS AND SUPPLY AND DISCHARGE MEANS FOR A MOTIVE FLUID; SAID SLIDE-VALVE DEVICE COMPRISING A TUBULAR VALVE SPOOL SLIDABLY MOUNTED ON SAID SHAFT FOR ROTATING
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |