Patent US3611972A successfully refreshed from Google Patents.
US3611972A
Expired / Lapsed
US
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Ship water jet directional control and braking means
Assignee: GRENOBLOISE ETUDE APPL
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Filing: 1969-03-20
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Granted: 1971-10-12
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Expires: 1989-03-20
Abstract
Abstract Water jets are discharged from the front of the ship by a pump installed in a Y-shaped duct into which the water flows longitudinally, centrally of the ship and from which the flow discharges on the two opposite sides of the hull.
Inventors
- 👤 Jacques P Duport
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:21
CPC Classifications
B; B63; B63H; B63H25/00; B63H25/46
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
292 words
Apparatus for effecting directional control and/or braking of a ship by means of water jets discharging from the front of the ship, comprising a Y-shaped duct having a main section to be located in the longitudinal central portion of the ship with its outer forward end forming a front-facing centralized inlet orifice in the bow of the forward-moving ship, and having two branch sections extending from a Y-branch entry at the inner end of said main section to the opposite sides of the hull and terminating in discharge orifices at such hull sides, whereby an inflow of water takes place in the longitudinal central portion of the forward end of the ship and such flow may be discharged on the two opposite sides of the hull, said two branch sections and their discharge orifices being constructed and arranged to cause the energy of the two jets discharged thereby to be dissipated perpendicularly to the direction of movement of the ship, means controlling the flow discharge through said orifice, and pump means for affecting the rate of flow through said Y-shaped duct and comprising a single-stage propeller pump located in said main duct section and having a specific discharge higher than 0.6, said controlling means being operable to discharge the jets from both of said orifices at the same time during forward movement of the ship so that the energy created in such jets by the flow which enters the inlet orifice at the bow due to the forward movement of the ship and the additional action of said pump means on said flow is simultaneously dissipated on both sides of the hull perpendicularly to the forward movement of the ship to exert a braking action on such forward movement of the ship.
Claim 2
Dependent Claim
292 words
Apparatus for effecting directional control and/or braking of a ship by means of water jets discharging from the front of the ship, comprising a Y-shaped duct having a main section to be located in the longitudinal central portion of the ship with its outer forward end forming a front-facing centralized inlet orifice in the bow of the forward-moving ship, and having two branch sections extending from a Y-branch entry at the inner end of said main section to the opposite sides of the hull and terminating in discharge orifices at such hull sides, whereby an inflow of water takes place in the longitudinal central portion of the forward end of the ship and such flow may be discharged on the two opposite sides of the hull, said two branch sections and their discharge orifices being constructed and arranged to cause the energy of the two jets discharged thereby to be dissipated perpendicularly to the direction of movement of the ship, means controlling the flow discharge through said orifice, and pump means for affecting the rate of flow through said Y-shaped duct and comprising a single-stage propeller pump located in said main duct section and having a specific discharge higher than 0.6, said controlling means being operable to discharge the jets from both of said orifices at the same time during forward movement of the ship so that the energy created in such jets by the flow which enters the inlet orifice at the bow due to the forward movement of the ship and the additional action of said pump means on said flow is simultaneously dissipated on both sides of the hull perpendicularly to the forward movement of the ship to exert a braking action on such forward movement of the ship.
Claim 3
Dependent Claim
235 words
Apparatus for effecting directional control and/or braking of a ship by means of water jets discharging from the front of the ship, comprising a Y-shaped duct having a main section to be located in the longitudinal central portion of the ship with its outer forward end forming a front-facing centralized inlet orifice joined by a wide-radius transition surface to the outer hull surface of the ship, and having two branch sections extending from the inner end of said main section to the opposite sides of the hull and terminating in discharge orifices at such hull sides, whereby an inflow of water takes place in the longitudinal central portion of the forward end of the ship and such flow may be discharged on the two opposite sides of the hull, said discharge orifices being arranged lengthwise of the ship and discharging such inflow in the form of jets directly into the surrounding water in directions transverse to the direction of movement of the ship, means controlling the flow discharge through said orifices, and pump means for affecting the rate of flow through said Y-shaped duct and comprising a pump located in said main duct section adjacent to such transition surface, a faired nose cap provided on the inlet end of said pump, and a faired tail section extending from the impeller blade hub of said pump and through the longitudinal central portIon of said Y-shaped duct.
Claim 4
Dependent Claim
235 words
Apparatus for effecting directional control and/or braking of a ship by means of water jets discharging from the front of the ship, comprising a Y-shaped duct having a main section to be located in the longitudinal central portion of the ship with its outer forward end forming a front-facing centralized inlet orifice joined by a wide-radius transition surface to the outer hull surface of the ship, and having two branch sections extending from the inner end of said main section to the opposite sides of the hull and terminating in discharge orifices at such hull sides, whereby an inflow of water takes place in the longitudinal central portion of the forward end of the ship and such flow may be discharged on the two opposite sides of the hull, said discharge orifices being arranged lengthwise of the ship and discharging such inflow in the form of jets directly into the surrounding water in directions transverse to the direction of movement of the ship, means controlling the flow discharge through said orifices, and pump means for affecting the rate of flow through said Y-shaped duct and comprising a pump located in said main duct section adjacent to such transition surface, a faired nose cap provided on the inlet end of said pump, and a faired tail section extending from the impeller blade hub of said pump and through the longitudinal central portIon of said Y-shaped duct.
Claim 5
Dependent Claim
258 words
Apparatus for effecting directional control and/or braking of a ship by means of water jets discharging from the front of the ship, comprising a Y-shaped duct having a main section to be located in the longitudinal central portion of the ship with its outer forward end forming a front-facing centralized inlet orifice, and having two branch sections extending from a Y-branch entry at the inner end of said main section to the opposite sides of the hull and terminating in discharge orifices at such hull sides, whereby an inflow of water takes place in the longitudinal central portion of the forward end of the ship and such flow may be discharged on the two opposite sides of the hull, the ratio between the cross-sectional area of the Y-branch entry at the inner end of said main duct section and the cross-sectional area of each duct section at its discharge orifice is approximately between 1.3:1 and 2:1, and the total combined cross-sectional area of the two discharge orifices is greater than or at least equal to the cross-sectional area at the Y-branch entry at such inner end of said main section, said discharge orifices discharging such inflow in the form of jets directly into the surrounding water in directions transverse to the direction of movement of the ship, means controlling the flow discharge through said orifices, and pump means for affecting the rate of flow through said Y-shaped duct and comprising a single-stage propeller pump located in said main duct section and having a specific discharge higher than 0.6.
Claim 6
Dependent Claim
258 words
Apparatus for effecting directional control and/or braking of a ship by means of water jets discharging from the front of the ship, comprising a Y-shaped duct having a main section to be located in the longitudinal central portion of the ship with its outer forward end forming a front-facing centralized inlet orifice, and having two branch sections extending from a Y-branch entry at the inner end of said main section to the opposite sides of the hull and terminating in discharge orifices at such hull sides, whereby an inflow of water takes place in the longitudinal central portion of the forward end of the ship and such flow may be discharged on the two opposite sides of the hull, the ratio between the cross-sectional area of the Y-branch entry at the inner end of said main duct section and the cross-sectional area of each duct section at its discharge orifice is approximately between 1.3:1 and 2:1, and the total combined cross-sectional area of the two discharge orifices is greater than or at least equal to the cross-sectional area at the Y-branch entry at such inner end of said main section, said discharge orifices discharging such inflow in the form of jets directly into the surrounding water in directions transverse to the direction of movement of the ship, means controlling the flow discharge through said orifices, and pump means for affecting the rate of flow through said Y-shaped duct and comprising a single-stage propeller pump located in said main duct section and having a specific discharge higher than 0.6.
Claim 7
Dependent Claim
32 words
Apparatus as defined in claim 3, in which said main duct section inwardly from the pump propeller to the entrance of the Y-branch of the duct, is a slightly divergent straight section.
Claim 8
Dependent Claim
48 words
Apparatus as defined in claim 3, in which said branch duct sections are hydraulically designed to have rounded transition contours such that with only one discharge orifice open, the open discharge orifice will discharge full bore without separation and with a substantially uniform flow distribution across the jet.
Claim 9
Dependent Claim
208 words
Apparatus for effecting directional control and/or braking of a ship by means of water jets discharging from the front of the ship, comprising a Y-shaped duct having a main section to be located in the longitudinal central portion of the ship with its outer forward end forming a front-facing centralized inlet orifice, and having two branch sections extending from the inner end of said main section to the opposite sides of the hull and terminating in discharge orifices at such hull sides, whereby an inflow of water takes place in the longitudinal central portion of the forward end of the ship and such flow may be discharged on the two opposite sides of the hull, said discharge orifices being arranged lengthwise of the ship and discharging such inflow in the form of jets directly into the surrounding water in directions transverse to the direction of movement of the ship, means for controlling the flow discharge through said orifices comprising shutters constructed and arranged to provide a continuation of the exterior surfaces of the hull in the fully closed condition thereof, and to be retracted inwardly into said branch duct sections from such fully closed condition, and pump means for affecting the rate of flow through said Y-shaped duct.
Claim 10
Dependent Claim
208 words
Apparatus for effecting directional control and/or braking of a ship by means of water jets discharging from the front of the ship, comprising a Y-shaped duct having a main section to be located in the longitudinal central portion of the ship with its outer forward end forming a front-facing centralized inlet orifice, and having two branch sections extending from the inner end of said main section to the opposite sides of the hull and terminating in discharge orifices at such hull sides, whereby an inflow of water takes place in the longitudinal central portion of the forward end of the ship and such flow may be discharged on the two opposite sides of the hull, said discharge orifices being arranged lengthwise of the ship and discharging such inflow in the form of jets directly into the surrounding water in directions transverse to the direction of movement of the ship, means for controlling the flow discharge through said orifices comprising shutters constructed and arranged to provide a continuation of the exterior surfaces of the hull in the fully closed condition thereof, and to be retracted inwardly into said branch duct sections from such fully closed condition, and pump means for affecting the rate of flow through said Y-shaped duct.
Claim 11
Dependent Claim
39 words
Apparatus as defined in claim 3, in which said flow discharge control means includes adjustable closure means at the terminal ends of said branch duct sections for each discharge orifice, and means operable to selectively control said closure means.
Claim 12
Dependent Claim
241 words
Apparatus for effecting directional control and/or braking of a ship by means of water jets discharging from the front of the ship, comprising a Y-shaped duct having a main section to be located in the longitudinal central portion of the ship with its outer forward end forming a front-facing centralized inlet orifice, and having two branch sections extending from the inner end of sAid main section to the opposite sides of the hull and terminating in discharge orifices at such hull sides, whereby an inflow of water takes place in the longitudinal central portion of the forward end of the ship and such flow may be discharged on the two opposite sides of the hull, said discharge orifices being arranged lengthwise of the ship and discharging such inflow in the form of jets directly into the surrounding water in directions transverse to the direction of movement of the ship, means for controlling the flow discharge through said orifices including a plurality of shutters covering each of said discharge orifices and having joint lines disposed generally parallel to the ship''s longitudinal centerline, the shutters at each orifice being constructed and arranged to provide a continuation of the exterior surfaces of the hull in the closed condition thereof, and to be retracted inwardly into its associated branch duct section from such fully closed condition, and means for actuating such shutters, and pump means for affecting the rate of flow through said Y-shaped duct.
Claim 13
Dependent Claim
241 words
Apparatus for effecting directional control and/or braking of a ship by means of water jets discharging from the front of the ship, comprising a Y-shaped duct having a main section to be located in the longitudinal central portion of the ship with its outer forward end forming a front-facing centralized inlet orifice, and having two branch sections extending from the inner end of sAid main section to the opposite sides of the hull and terminating in discharge orifices at such hull sides, whereby an inflow of water takes place in the longitudinal central portion of the forward end of the ship and such flow may be discharged on the two opposite sides of the hull, said discharge orifices being arranged lengthwise of the ship and discharging such inflow in the form of jets directly into the surrounding water in directions transverse to the direction of movement of the ship, means for controlling the flow discharge through said orifices including a plurality of shutters covering each of said discharge orifices and having joint lines disposed generally parallel to the ship''s longitudinal centerline, the shutters at each orifice being constructed and arranged to provide a continuation of the exterior surfaces of the hull in the closed condition thereof, and to be retracted inwardly into its associated branch duct section from such fully closed condition, and means for actuating such shutters, and pump means for affecting the rate of flow through said Y-shaped duct.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |