US3242992A
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Assignee: RTX Corp
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Filing: 1964-09-25
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Granted: 1966-03-29
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Expires: 1984-09-25
Abstract
No abstract record available.
Inventors
- 👤 Raymond N Quenneville
- 👤 Philip E Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:06
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/06; B63H3/08; B63H3/081; B63H3/082; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/40; F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; B63H2003/088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN A VARIABLE PITCH PROPELLER, MEANS TO VARY THE PITCH OF SAID PROPELLER BY A TRANSILATORY MOTION, CONTROL MEANS TO GOVERN SAID PITCH VARYING MEANS, AND FEEDBACK MEANS BETWEEN SAID PITCH VARYING MEANS AND SAID CONTROL MEANS INCLUDING A FIRST SHAFT RESTRAINED FROM ROTATING AND CONNECTED TO TRANSLATE WITH SAID PITCH VARYING MEANS, A SECOND SHAFT RESTRAINED FROM TRANSLATING AND CONNECTED TO SAID CONTROL MEANS, AND A HELICAL SCREW CONNECTING SAID SHAFTS SO THAT TRANSLATION OF SAID FIRST SHAFT CAUSES ROTATION OF SAID SECOND SHAFT TO PROVIDE A FEEDBACK TO SAID CONTROL MEANS.
Claim 2
Dependent Claim
93 words
IN A VARIABLE PITCH PROPELLER, MEANS TO VARY THE PITCH OF SAID PROPELLER BY A TRANSILATORY MOTION, CONTROL MEANS TO GOVERN SAID PITCH VARYING MEANS, AND FEEDBACK MEANS BETWEEN SAID PITCH VARYING MEANS AND SAID CONTROL MEANS INCLUDING A FIRST SHAFT RESTRAINED FROM ROTATING AND CONNECTED TO TRANSLATE WITH SAID PITCH VARYING MEANS, A SECOND SHAFT RESTRAINED FROM TRANSLATING AND CONNECTED TO SAID CONTROL MEANS, AND A HELICAL SCREW CONNECTING SAID SHAFTS SO THAT TRANSLATION OF SAID FIRST SHAFT CAUSES ROTATION OF SAID SECOND SHAFT TO PROVIDE A FEEDBACK TO SAID CONTROL MEANS.
References Cited (Backward Citations)
US1942189A
Cited
GB629540A
Cited
US2849072A
Cited
US2850103A
Cited
GB904744A
Cited
FR1260746A
Cited
GB966431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |