US4245520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing apparatus
Assignee: Northrop Grumman Corp
•
Filing: 1977-11-21
•
Granted: 1981-01-20
•
Expires: 1997-11-21
Abstract
Abstract A gear train including an internal gear is combined with a forced synchronized clutch and a hydraulic coupling to form a reversing apparatus for ship propellers.
Inventors
- 👤 Harold W. Semar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:09
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/02; B63H23/08; F; F16; F16H; F16H37/00; F16H37/02; F16H37/06; F16H37/08; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19484; Y10T74/19488
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
158 words
A reversing apparatus for transmitting power from a prime mover to a propeller of a ship, said reversing apparatus comprising a first shaft connected to said prime mover, a second shaft connected to said propeller, a drive gear affixed to said first shaft, at least one idler gear meshing with said drive gear, an internal gear meshing with said idler gear, a forced synchronizing clutch connecting said first shaft and said second shaft in positive engagement, a fluid coupling connecting said internal gear to said second shaft, and a fluid supply for the fluid coupling connecting the internal gear and the second shaft, the fluid supply having a large reservoir which serves as a heat sink for large energy absorption by the fluid coupling, said forced synchronizing clutch and fluid coupling cooperating to drive said propeller in an ahead mode when said forced synchronizing clutch is engaged and in an astern mode when said fluid coupling is engaged.
Claim 2
Dependent Claim
158 words
A reversing apparatus for transmitting power from a prime mover to a propeller of a ship, said reversing apparatus comprising a first shaft connected to said prime mover, a second shaft connected to said propeller, a drive gear affixed to said first shaft, at least one idler gear meshing with said drive gear, an internal gear meshing with said idler gear, a forced synchronizing clutch connecting said first shaft and said second shaft in positive engagement, a fluid coupling connecting said internal gear to said second shaft, and a fluid supply for the fluid coupling connecting the internal gear and the second shaft, the fluid supply having a large reservoir which serves as a heat sink for large energy absorption by the fluid coupling, said forced synchronizing clutch and fluid coupling cooperating to drive said propeller in an ahead mode when said forced synchronizing clutch is engaged and in an astern mode when said fluid coupling is engaged.
Claim 3
Dependent Claim
23 words
The reversing apparatus as set forth in claim 1, wherein the first and second shafts are coaxial and have bearing means disposed therebetween.
Claim 4
Dependent Claim
36 words
The reversing apparatus as set forth in claim 1, wherein the gears cooperate to drive the second shaft at a reduced speed when the means releasably connecting the internal gear to the second shaft is engaged.
References Cited (Backward Citations)
US170667A
Cited
US259572A
Cited
GB185836A
Cited
US1493128A
Cited
US2742981A
Cited
US2926550A
Cited
US3063529A
Cited
US3009553A
Cited
US3481148A
Cited
US3435707A
Cited
US3478622A
Cited
US3683719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |