US4242925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing apparatus
Assignee: Northrop Grumman Corp
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Filing: 1978-07-17
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Granted: 1981-01-06
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Expires: 1998-07-17
Abstract
Abstract Planetary gears are cooperatively associated with a clutch and brake to provide reversing of a propeller driven by a unidirectional prime mover.
Inventors
- 👤 Alexander Farkas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:25
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/02; B63H23/08; F; F16; F16H; F16H3/00; F16H3/44; F16H3/46; F16H3/60
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
147 words
Reversing apparatus for reversing a propeller of a ship driven by a unidirectional drive, said apparatus comprising a first shaft directly connected to the unidirectional drive; a second shaft connected to the propeller; a sun gear affixed to said first shaft; a plurality of planet gears meshing with said sun gear; a ring gear directly connected to the second shaft and meshing with said planet gears; said planet gears being rotatably disposed in a planet carrier; braking means connected to said planet carrier to stop rotation of said planet carrier when engaged and reversing the direction of rotation of said second shaft and the propeller; and clutching means disposed between said first and second shaft whereby engagement of said clutch and disengagement of the brake will cause the first and second shafts to rotate in the same direction and the propeller to rotate in the ahead direction.
Claim 2
Dependent Claim
147 words
Reversing apparatus for reversing a propeller of a ship driven by a unidirectional drive, said apparatus comprising a first shaft directly connected to the unidirectional drive; a second shaft connected to the propeller; a sun gear affixed to said first shaft; a plurality of planet gears meshing with said sun gear; a ring gear directly connected to the second shaft and meshing with said planet gears; said planet gears being rotatably disposed in a planet carrier; braking means connected to said planet carrier to stop rotation of said planet carrier when engaged and reversing the direction of rotation of said second shaft and the propeller; and clutching means disposed between said first and second shaft whereby engagement of said clutch and disengagement of the brake will cause the first and second shafts to rotate in the same direction and the propeller to rotate in the ahead direction.
Claim 3
Dependent Claim
21 words
Apparatus as set forth in claim 1 and further comprising a third shaft generally parallel to the first and second shaft.
Claim 4
Dependent Claim
17 words
Apparatus as set forth in claim 2, wherein third shaft has the brake and clutch disposed thereon.
Claim 5
Dependent Claim
68 words
Apparatus as set forth in claim 2 are further comprising a spur gear disposed on the second shaft and a spur gear disposed on the planet carrier and wherein the third shaft has two spur gears disposed thereon one of which is disposed to engage the spur gear disposed on the second shaft and the other is disposed to engage the spur gear disposed on the planet carrier.
Claim 6
Dependent Claim
47 words
Apparatus as set forth in claim 3, wherein the third shaft has two spur gears disposed thereon one of which is disposed to engage a spur gear disposed on the second shaft and the other is disposed to engage a spur gear disposed on the planet carrier.
Claim 7
Dependent Claim
17 words
Apparatus as set forth in claim 3, wherein the first and second shafts are in axial alignment.
Claim 8
Dependent Claim
17 words
Apparatus as set forth in claim 1, wherein the first and second shafts are in axial alignment.
Claim 9
Dependent Claim
15 words
Apparatus as set forth in claim 1 wherein the first and second shafts are concentric.
Claim 10
Dependent Claim
17 words
Apparatus as set forth in claim 8, wherein the second shaft has a pinion gear disposed thereon.
Claim 11
Dependent Claim
17 words
Apparatus as set forth in claim 1, wherein the second shaft has a pinion gear disposed thereon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |