US3800731A - Ship retarding system - Google Patents
Ship retarding system Download PDFInfo
- Publication number
- US3800731A US3800731A US00252110A US3800731DA US3800731A US 3800731 A US3800731 A US 3800731A US 00252110 A US00252110 A US 00252110A US 3800731D A US3800731D A US 3800731DA US 3800731 A US3800731 A US 3800731A
- Authority
- US
- United States
- Prior art keywords
- duct
- discharge
- director
- mouth
- ship
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/48—Steering or slowing-down by deflection of propeller slipstream otherwise than by rudder
Definitions
- SHEET u [1F 4 SHIP RETARDING SYSTEM] This invention relates to a ship retarding system and one object is to provide mechanism for assisting in the slowing down of a large oil tanker or other vessel at sea while at the same time being capable of assisting manoeuvring of the vessel in port.
- a ship retarding system includes means defining a forward facing mouth for receiving water into a duct and a discharge director leading from the duct and capable of directing discharge of the water forwardly.
- the duct may include an engine driven pump for increasing the velocity of flow of the water and the discharge director may be adjustable, preferably continuously, so that thedischarg e can be in any selected direction whereby if it is not required merely to slow the vessel down but also to shift the bow to one side or the other, this is possible with an easy adjustment.
- the discharge is conveniently through the bottom of the hull and for this purpose the director may be approximately flush with a flat portion of the bottom of the hull.
- a convenient shape of duct is one including an approximately horizontal passage containing the pump joined to an approximately vertical passage leading to the discharge director.
- a preferred form of the mouth-defining means comprises two ducts one at each side of the bow which are normally in a 'vetted-in position in the sides of the bow but can be projected one to port and one to starboard when the retarding action is needed.
- FIG. 1 is a side elevation through the lower part of the bows of a hull embodying the invention
- FIG. 2 is a plan view of the bow of FIG. 1;
- FIG. 3 is a front view of the same bow showing alternative mouths at port and starboard, and
- FIGS. 4 and 5 are views corresponding to FIGS. 1 and 2 showing a modification.
- the hull 11 is shown as having the rather bulbous forward protrusion 12 below the waterline that is becoming common in larger tankers and within this bulbous portion 12 is mounted a duct 13 comprising a generally horizontal portion 14 containing a pump 15 driven through a shaft 16 and a gearbox 17 by an engine 18 and a rearwardly and downwardly curved portion 21 leading from the horizontal portion 14 to a discharge director 22 opening into a circular hole 23 in the flat bottom of the hull 11.
- the director 22 comprises a rotatable member having curved guide vanes 24 so that by turning a vertical shaft 25 by steering gear 26 the discharge can be directed in any direction in a plane parallel with the plane of FIG. 2, for example'as shown at 27 or 28 in FIG. 1 which shows that the discharge is in fact slightly down ward of the theoretical horizontal direction.
- Inlet to the duct 13 is through two forwardly facing mouths 31 defined by movable ducts 32.
- Each duct 32 can be turned about a vertical axis 33 by a hydraulic ram 34 to be either in an inboard position 35 in which it is faired into the side of the hull, or in a projecting, or outboard, position 36 in which it is substantially forwardly directed so that there will be a natural tendency for water to enter the mouth as the ship moves ahead.
- steering can be assisted, whether the vessel is moving or is stationary, by directing the discharge in any other of the directions in the plane of FIG. 2.
- the mouths 31 are protected by grills which may consist of vertical, spaced bars 38 shown at the left in FIG. 3 or horizontal, spaced bars 39 shown at the right inFIG. 3.
- the bars 38 can be kept scraped clean of debris by rotating aginst the edge 41 of the hull indicated in FIG. 2 but it is preferred that the bars 39 are used because these can be scraped clean every time the mouth closes by projections at 42 corresponding to the spaces between bars 39.
- FIGS. 4 and 5 show how in a modification, water can enter the duct 13 through a front opening 45 protected by a grid, instead of through the mouths 31.
- the flow of water can be controlled by a semibalanced butterfly-type inlet valve 46 which can be turned about a vertical axis 47 by a hydraulic ram 48 and a crank 49, or possibly by anelectric drive. There may also be an emergency hand operated gear for the valve.
- a ship retarding system including: means defining a forward facing mouth for receiving water; a discharge director; a duct leading from the mouth to the discharge director; and an engine driven pump in the duct for increasing the velocity of flow of the water to the discharge director, the discharge director being mounted flush with a flat portion of the bottom of the hull and being mounted for continuous adjustment about a vertical axis so that the discharge therethrough can be in a direction having a horizontal component selected from a range including the forward direction and side directions.
- a system as claimed in claim 1 in which the mouth defining means comprises two ducts one at each side of the bow of the ship and means for moving each duct joined to a vertical passage leading to the discharge director.
- a system as claimed in claim 4 in which a shaft for driving the pump and a shaft for adjusting the director cross one another, being laterally spaced from one another in the duct, and in which each shaft leads beyond the duct wall to means for turning it.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Cleaning Or Clearing Of The Surface Of Open Water (AREA)
- Braking Arrangements (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1463571A GB1362694A (en) | 1971-05-13 | 1971-05-13 | Ship retarding system |
Publications (1)
Publication Number | Publication Date |
---|---|
US3800731A true US3800731A (en) | 1974-04-02 |
Family
ID=10044810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00252110A Expired - Lifetime US3800731A (en) | 1971-05-13 | 1972-05-10 | Ship retarding system |
Country Status (4)
Country | Link |
---|---|
US (1) | US3800731A (de) |
JP (1) | JPS56167000U (de) |
DE (1) | DE2223389C2 (de) |
GB (1) | GB1362694A (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4147125A (en) * | 1976-07-26 | 1979-04-03 | Elliott Turbomachinery Limited | Steering and propulsion means for ships or other vessels |
US4902254A (en) * | 1985-09-05 | 1990-02-20 | Chas Jean Bernard | Propulsion device with conditioned inertia |
US8316787B2 (en) | 2010-08-12 | 2012-11-27 | Larry Douglas Back | Braking system for watercraft |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2177666A (en) * | 1985-03-15 | 1987-01-28 | Oscar Robert Rendell | Propulsion means for water craft |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2356301A (en) * | 1942-09-18 | 1944-08-22 | Brase George | Apparatus for propelling and steering boats |
US3342032A (en) * | 1966-06-29 | 1967-09-19 | Clifford B Cox | Jet propulsion means for a boat |
US3611972A (en) * | 1968-03-21 | 1971-10-12 | Grenobloise Etude Appl | Ship water jet directional control and braking means |
US3643438A (en) * | 1969-12-31 | 1972-02-22 | Charles R Barsby | Jet engines |
US3687374A (en) * | 1970-07-02 | 1972-08-29 | Gen Electric | Swivelable jet nozzle |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69347C (de) * | G. WOU-TERS in Grimberghen, Belgien | Vorrichtung zum Umstellen des Wassertromes bei Reactions-Propellern | ||
GB503593A (en) * | 1937-07-08 | 1939-04-11 | James Herbert Wainwright Gill | Improvements in or relating to hydraulic propulsion and manoeuvring apparatus |
GB1293554A (en) * | 1969-03-26 | 1972-10-18 | Nat Res Dev | Improvements in and relating to the stopping and manoeuvring of ships |
-
1971
- 1971-05-13 GB GB1463571A patent/GB1362694A/en not_active Expired
-
1972
- 1972-05-10 US US00252110A patent/US3800731A/en not_active Expired - Lifetime
- 1972-05-12 DE DE2223389A patent/DE2223389C2/de not_active Expired
-
1981
- 1981-04-30 JP JP1981061661U patent/JPS56167000U/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2356301A (en) * | 1942-09-18 | 1944-08-22 | Brase George | Apparatus for propelling and steering boats |
US3342032A (en) * | 1966-06-29 | 1967-09-19 | Clifford B Cox | Jet propulsion means for a boat |
US3611972A (en) * | 1968-03-21 | 1971-10-12 | Grenobloise Etude Appl | Ship water jet directional control and braking means |
US3643438A (en) * | 1969-12-31 | 1972-02-22 | Charles R Barsby | Jet engines |
US3687374A (en) * | 1970-07-02 | 1972-08-29 | Gen Electric | Swivelable jet nozzle |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4147125A (en) * | 1976-07-26 | 1979-04-03 | Elliott Turbomachinery Limited | Steering and propulsion means for ships or other vessels |
DK155584B (da) * | 1976-07-26 | 1989-04-24 | Elliott Turbo | Styre- og fremdrivningsaggregat til et fartoej |
US4902254A (en) * | 1985-09-05 | 1990-02-20 | Chas Jean Bernard | Propulsion device with conditioned inertia |
US8316787B2 (en) | 2010-08-12 | 2012-11-27 | Larry Douglas Back | Braking system for watercraft |
Also Published As
Publication number | Publication date |
---|---|
JPS56167000U (de) | 1981-12-10 |
GB1362694A (en) | 1974-08-07 |
DE2223389C2 (de) | 1985-03-21 |
DE2223389A1 (de) | 1972-11-23 |
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