US20140090588A1 - Steering and roll-stabilizing device with retractable fins - Google Patents

Steering and roll-stabilizing device with retractable fins Download PDF

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Publication number
US20140090588A1
US20140090588A1 US14/116,324 US201214116324A US2014090588A1 US 20140090588 A1 US20140090588 A1 US 20140090588A1 US 201214116324 A US201214116324 A US 201214116324A US 2014090588 A1 US2014090588 A1 US 2014090588A1
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US
United States
Prior art keywords
blade
fin
housing
steering
stabilizing
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.)
Abandoned
Application number
US14/116,324
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English (en)
Inventor
Giorgio Brighi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of US20140090588A1 publication Critical patent/US20140090588A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • 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
    • B63H25/06—Steering by rudders
    • B63H25/38—Rudders
    • 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
    • B63H25/06—Steering by rudders
    • B63H25/38—Rudders
    • B63H25/382—Rudders movable otherwise than for steering purposes; Changing geometry
    • 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
    • B63H25/06—Steering by rudders
    • B63H25/38—Rudders
    • B63H25/382—Rudders movable otherwise than for steering purposes; Changing geometry
    • B63H2025/384—Rudders movable otherwise than for steering purposes; Changing geometry with means for retracting or lifting
    • 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
    • B63H25/06—Steering by rudders
    • B63H25/38—Rudders
    • B63H25/382—Rudders movable otherwise than for steering purposes; Changing geometry
    • B63H2025/384—Rudders movable otherwise than for steering purposes; Changing geometry with means for retracting or lifting
    • B63H2025/385—Rudders movable otherwise than for steering purposes; Changing geometry with means for retracting or lifting by pivoting

Definitions

  • rudders On today's motorized craft, for steering, one or more traditional rudders are used, generally consisting of a blade provided with a torsion shaft maneuvered from inside the hull. Similar system is used for stabilizing devices. Those kinds of appendages are normally maintained immersed during navigation also when not utilized with the drawback of a power consumption particularly on fast boats such as motor yachts, patrol vessels, catamarans etc, considering also that this power consumption increases not proportionally but with the square of speed.
  • FIGS. 6 , 7 , 8 , 9 Another drawback less evident but not less important that will be better illustrated at the end of the present Description and in FIGS. 6 , 7 , 8 , 9 consists on the fact that, when sailing in rough sea, the action of the water on the rudder blade, usually oriented up to a maximum value of 35°, creates, beside a drag, lifting forces perpendicular to the longitudinal axis of the ship ( FIG. 7 ) acting abaft alternatively on the port or starboard side, forcing the ship to follow a zigzagging course.
  • This situation better named in the marine jargon “yawing” reduces speed and increases fuel consumptions a lot as any skipper well knows.
  • the system object of this invention will reduce such situation due to the asymmetric drag force induced by the rudder operating only on the veering side.
  • a steering system has been studied and realized maintaining the rudders retracted on board during course but configured to be inserted into the water each time when necessary for steering.
  • the immersed rudder was only that one inside the veering.
  • the system was based on the fact that any watercraft having a completely symmetrical keel and with balanced propulsive forces tends to keep a constant direction of course if no extraneous forces such as wind, wave motion, current etc. intervene to change the direction of navigation.
  • the equipment object of the invention has the particularity to be used also as a stabilization device in conditions of rough sea but also in certain situations at high speed when the boat takes a swinging tendency creating serious concerns on board.
  • the antirolling stabilization equipment of today consists generally in a pair of fins similar to rudders outstanding on both sides of the boat under water level, these fins rotating on their axis and automatically maneuvered from inside board being capable to create a torque opposed to that torque created by rough sea.
  • the system object of the invention is constructively the same whether used for steering or for stabilization of the craft during navigation, and includes at least two units each contained in a watertight housing to be installed one on starboard side and the other on port side. Particularly in case of steering gear, the units will be placed with their vertical axis abaft the ship while, in case of stabilization gear, will be placed near the middle of the ship prevalently with a horizontal axis.
  • Each unit contains inside a blade (or a fin) provided with a moving device, capable to retract or to project the fin outboard partially or totally when necessary for steering or for stabilizing, passing through the bottom of the housing where a suitable slot is provided.
  • Such device consists essentially of a plate 2 joined together with the fin 1 and tilting on a shaft 4 pivoting inside the housing 3 but holding out at least one end 5 passing through a hub 44 provided with a seal 49 to maintain watertight the housing and at same time to receive a remote control by any kind of electric or hydraulic actuator and at same time to transmit remote information on fin position.
  • FIG. 1 is an exploded perspective representation of the unit to be installed on the portboard side (the starboard side unit is symmetrical).
  • FIG. 2 shows a vertical section in the middle plane of the same unit.
  • the blade 1 is characterized by having a curvilinear profile, in order to permit an easy and complete outlet from the watertight housing 3 obtaining a considerable volume reduction.
  • the angle of incidence of the blade will be constant or variable along the axis of the blade according to boat features.
  • the blade 1 joined together to the plate 2 is tilting around the axis 4 .
  • the housing 3 / 33 having prevalently a rectangular section, will be structured in one, two or more parts to permit the assembly of the internal components and to facilitate also the inspections when necessary.
  • the inferior section 3 could be less tall than the cover 33 but sufficient to locate two side bearings 31 / 32 proportioned to support all forces of lifting and drag generated from water action on the blade.
  • the same housing 3 will be provided on the base plate with a slot or an aperture 34 having appropriated dimensions to permit the passage of the blade.
  • closure flanges 35 of the housing sections 3 / 33 will be connected by a series of bolts non shown in the figures after interposal of an adequate tested seal 49 capable of providing a perfect water tightness.
  • a strong material such as stainless steel should be suggested for the inferior section 3 of the housing supporting the forces transmitted from the plate appendages 21 / 22 on the bearing while for the section 33 having only cover function a fiber glass or aluminum material could be appropriate being light and not expensive.
  • the inferior section of the housing 3 will be provided with appendages like 36 to be coordinated with the shipyard in order to connect the housings to the craft.
  • the components 1 - 2 - 21 - 22 - 4 can be realized in only one piece.
  • FIG. 3 shows in detail a section made in a horizontal plane corresponding to the control shaft axis 4 of the plate 2 where we can see the following components: the shaft 4 joined to the plate appendages 21 / 22 by spines 41 / 42 or similar connections while in case of standard production the components 1 - 2 - 21 - 22 - 4 can be realized in one piece.
  • the bearing 31 / 32 connected to the housing sides 3 will consist preferably of two hubs 43 / 44 in order to facilitate assembling and disassembling. Each is provided with long service bushing 46 / 47 capable of resisting sea water and supporting all forces of lifting and drag transmitted by the blades. In case that the units will be used as a stabilizing system and, with particularly heavy duty service, a pair of rolling bearing could be used, properly protected.
  • the terminal hub 44 of the shaft 4 going outside of the housing 3 will be provided with a seal 49 widely used and tested to maintain total watertight.
  • a mechanical or electrical device transmitting a signal of the blade position may be installed, being this signal very important as feedback for the electronic controls.
  • FIG. 4 shows an external view of one steering unit in a compact version where the control shaft 4 sorting out of the housing is operated by the lever 5 from one hydraulic actuator 55 requiring a limited power because the forces to overcome are manly reduced to the friction forces acting on the bearing 46 / 47 .
  • FIG. 5 shows in the same scale of the unit FIG. 4 an assembled view of a known steering or stabilizing unit. It is characterized by a different movable system of the fin essentially requiring major encumbrance on board specially in height and over all causing difficulties in obtaining, outside of the unit, the signal giving constantly the fin position. This is particularly important especially for automatic electronic controls.
  • the rudder exposed only inside the veering could be provided with a hydrodynamic profile having a better lifting feature than the conventional one requires a symmetric profile to work with both faces.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Toys (AREA)
  • Transmission Devices (AREA)
  • Pallets (AREA)
  • Escalators And Moving Walkways (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
US14/116,324 2011-05-12 2012-05-10 Steering and roll-stabilizing device with retractable fins Abandoned US20140090588A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT000053A ITGE20110053A1 (it) 2011-05-12 2011-05-12 Apparati di governo e di stabilizzazione antirollio a pale retrattili.
ITGE2011A000053 2011-05-12
PCT/EP2012/058634 WO2012152864A1 (fr) 2011-05-12 2012-05-10 Dispositif de direction et de stabilisation en roulis avec dérives rétractables

Publications (1)

Publication Number Publication Date
US20140090588A1 true US20140090588A1 (en) 2014-04-03

Family

ID=44554444

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/116,324 Abandoned US20140090588A1 (en) 2011-05-12 2012-05-10 Steering and roll-stabilizing device with retractable fins

Country Status (3)

Country Link
US (1) US20140090588A1 (fr)
IT (1) ITGE20110053A1 (fr)
WO (1) WO2012152864A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111782018A (zh) * 2020-08-24 2020-10-16 杭州根基科技有限公司 一种计算机机箱稳定设备
CN114212228A (zh) * 2021-12-01 2022-03-22 中国科学院深圳先进技术研究院 仿生鱼尾及仿生机器鱼

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB825794A (en) * 1957-07-30 1959-12-23 Frederick Lionel Miller Improvements in or relating to centre boards or dropkeels for yachts and the like watercraft
US5385110A (en) * 1990-09-07 1995-01-31 Bennett Marine, Incorporated Of Deerfield Beach Boat trim control and monitor system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB888452A (en) * 1960-04-19 1962-01-31 Franz Sueberkrub Improvements in and relating to anti-roll stabilizers of ships
FR1301936A (fr) * 1961-07-11 1962-08-24 Perfectionnements aux dispositifs de stabilisation des navires
FR1365434A (fr) * 1963-05-21 1964-07-03 Chantiers Navals Franco Belges Perfectionnement apportés aux ensembles de gouvernails avant pour véhicules aquatiques
IT1249231B (it) * 1991-06-14 1995-02-21 Franco Harrauer Timone per imbarcazioni
ITGE20040013A1 (it) * 2004-02-24 2004-05-24 Giorgio Brighi Appendici di carena retrattili per il governo e per la stabilizzazione di natanti a motore.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB825794A (en) * 1957-07-30 1959-12-23 Frederick Lionel Miller Improvements in or relating to centre boards or dropkeels for yachts and the like watercraft
US5385110A (en) * 1990-09-07 1995-01-31 Bennett Marine, Incorporated Of Deerfield Beach Boat trim control and monitor system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111782018A (zh) * 2020-08-24 2020-10-16 杭州根基科技有限公司 一种计算机机箱稳定设备
CN114212228A (zh) * 2021-12-01 2022-03-22 中国科学院深圳先进技术研究院 仿生鱼尾及仿生机器鱼

Also Published As

Publication number Publication date
ITGE20110053A1 (it) 2012-11-13
WO2012152864A1 (fr) 2012-11-15

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Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION