EP1464572A1 - Kielflosse für Boote, mit bewegbaren Lee-Flossen - Google Patents

Kielflosse für Boote, mit bewegbaren Lee-Flossen Download PDF

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Publication number
EP1464572A1
EP1464572A1 EP03425207A EP03425207A EP1464572A1 EP 1464572 A1 EP1464572 A1 EP 1464572A1 EP 03425207 A EP03425207 A EP 03425207A EP 03425207 A EP03425207 A EP 03425207A EP 1464572 A1 EP1464572 A1 EP 1464572A1
Authority
EP
European Patent Office
Prior art keywords
finkeel
lee
boards
hull
midplane
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.)
Withdrawn
Application number
EP03425207A
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English (en)
French (fr)
Inventor
Gianfranco Bianchi
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
Priority to EP03425207A priority Critical patent/EP1464572A1/de
Priority to US10/681,668 priority patent/US20040194683A1/en
Publication of EP1464572A1 publication Critical patent/EP1464572A1/de
Withdrawn legal-status Critical Current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 
    • B63B41/00—Drop keels, e.g. centre boards or side boards ; Collapsible keels, or the like, e.g. telescopically; Longitudinally split hinged keels

Definitions

  • the invention relates to boats, in particular sailing boats, equipped with a finkeel.
  • sailing boats normally have a keel with a fin protruding downward from the hull, called finkeel, at the ends of which there may be a bulb containing lead or other heavy material suitable to form a ballast.
  • the fin In small boats the fin may be raised or lowered manually in its plane, to extract it from the hull or immerse it in the water at different depths, while in larger boats it is fitted to the keel in a fixed manner, i.e. such that it cannot be extracted from the hull.
  • the present invention relates in particular to this second type of finkeel which may be, in turn, rigid, i.e. integral with the hull, or movable with respect thereto for adjusting the trim of the boat.
  • Finkeels allow to obtain advantageous effects including that of counter-heeling the inclination of the boat caused by the wind.
  • finkeels have been developed that can swing to the right or to the left with respect to a longitudinal midplane of the boat.
  • the finkeel is hinged at the bottom of the hull and is canted with respect to its hinging axis, by means of actuators, according to needs.
  • This type of finkeel is effective as regards the righting moment of the boat when the latter is subject to heel, because rotation of the finkeel allows the distribution of the weights to be changed, thereby better offsetting the force of the wind.
  • the righting moment is equivalent to the product of the weight of the finkeel, by the distance of its centre of gravity from the longitudinal axis of rotation of the boat.
  • the technical problem underlying the present invention is therefore that of overcoming the limitations of the state of the art considered above and, more generally, improving the performance of the finkeels in known boats.
  • the idea for solving this problem is that of providing a finkeel having a fixed base portion fixed with respect to the hull, and a moving end portion formed by two lee-boards hinged in book arrangement at the end of the fixed portion, rotatable independently of each other.
  • numeral 1 denotes a boat whose hull 2 is equipped with a finkeel 3 according to the invention.
  • the finkeel 3 comprises a fixed portion 30 extending downwards from the hull 2 in a manner similar to that of conventional finkeels, and a moving portion consisting of two fins 32 and 33 projecting from the fixed part and rotating with respect to a common horizontal hinging axis X, lying in the midplane M of the finkeel.
  • the fixed portion 30 is applied to the hull 2 at a connection end 30a, using fixing means not shown in the drawings and known per se; the junction may be of the removable type, preferably obtained by means of mechanical systems (bolts, cramps, etc.), or of the permanent and stable type obtained by applying resins or other materials, suitable for rigidly joining the connection end of the finkeel to the hull.
  • the moving lee-boards 32, 33 may be closed or opened like a book (Figs. 3 and 4) independently of each other, by causing them to rotate about the hinging axis X; for this purpose a bulb-shaped part 34 is present at the end of the fixed portion 30, housing means for rotation of the lee-boards.
  • the latter are moreover configured symmetrically with respect to the midplane M of the finkeel and in this example are each equipped with a respective ballast element 36 and 37.
  • lee-board 33 operation of lee-board 33 is made by means of a shaft 40 which is rotatably supported inside the bulb-shaped part 34, by two bearings 41 and 42; at the opposite ends of the shaft 40, respective pairs of radial arms 43 and 44 are present, while a sleeve 45 formed as one piece with the lee-board 33 is keyed in its central zone. Keying may be achieved by means of longitudinal grooves or in any other suitable way known per se.
  • the lee-board 33 is then displaced, integrally with the central sleeve 45 by the rotations of the shaft 40, which are imparted by hydraulic actuators 47 and 48 acting on the arms 43 and 44 located at its ends; the hydraulic actuators are fed with operating fluid by a pump situated on-board the boat and connected thereto by means of ducts passing inside the fixed portion 30 of the finkeel. Neither the pump nor the ducts are shown in the drawings since they are known per se.
  • said arms are operated by respective hydraulic actuators 55 and 56 which cause rotation of the sleeves 51, 52 and of the lee-board 32, together therewith; also in this case the actuators are connected to a supply pump arranged on-board the boat, by means of through-ducts passing in the fixed portion of the finkeel.
  • Canting of the lee-board 33 is obtained by rotating the shaft 40 on which its sleeve 45 is keyed; as explained above, rotation of the shaft is in turn performed by the actuators 47, 48.
  • the actuators 55, 56 operate the radial arms 53, 54 of the extensions 51a, 52a of the sleeves, in a manner similar to that already seen above; in this case the lee-board 33 will remain aligned with the midplane M.
  • the finkeel 3 considered above solves the technical problem underlying the present invention.
  • the lee-board 32 is rotated so as to lay it vertically, the resistance to the leeway is also increased; however, it must be pointed out that in the finkeel according to the invention the lee-boards 32, 33 may also be rotated in the same direction, to increase the righting moment of the hull.
  • the two lee-boards 32, 33 are symmetrical with respect to the axis of rotation X and have a limited length, because the finkeel 3 also comprises a fixed portion 30: consequently, in normal sailing conditions, i.e. with the boat not inclined as explained above, the two lee-boards 32 and 33 may be used as fixed lee-boards of the type used nowadays on some boats.
  • Fig. 4 shows a possible use of the lee-boards in this condition.
  • the division of the finkeel into a fixed portion and a moving portion with the lee-boards is moreover advantageous for the draught of the boat.
  • Figs. 9 and 10 show a finkeel wherein the lee-board 32 is divided into two elements 32', 32", while the lee-board 33 has a width such that it can be arranged between these elements.
  • this solution is equivalent to the one above since the lee-boards are joined together; however, in the case of the same total weight of the finkeel, the centre of gravity is located in a lower point.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP03425207A 2003-04-04 2003-04-04 Kielflosse für Boote, mit bewegbaren Lee-Flossen Withdrawn EP1464572A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03425207A EP1464572A1 (de) 2003-04-04 2003-04-04 Kielflosse für Boote, mit bewegbaren Lee-Flossen
US10/681,668 US20040194683A1 (en) 2003-04-04 2003-10-08 Finkeel for boats, with movable lee-boards

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03425207A EP1464572A1 (de) 2003-04-04 2003-04-04 Kielflosse für Boote, mit bewegbaren Lee-Flossen

Publications (1)

Publication Number Publication Date
EP1464572A1 true EP1464572A1 (de) 2004-10-06

Family

ID=32842909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03425207A Withdrawn EP1464572A1 (de) 2003-04-04 2003-04-04 Kielflosse für Boote, mit bewegbaren Lee-Flossen

Country Status (2)

Country Link
US (1) US20040194683A1 (de)
EP (1) EP1464572A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1739004A1 (de) * 2005-07-01 2007-01-03 Gianfranco Bianchi Faltbarer Senkkiel für Segelboote
FR2940781A1 (fr) * 2009-01-07 2010-07-09 Georges Cascarino Dispositif de correction de la gite d'une embarcation
WO2010098726A3 (en) * 2009-02-25 2011-06-30 Grom Tomaz Keel and sailing vessel incorporating such keel
WO2017083947A1 (pt) * 2015-11-18 2017-05-26 Chaves Manoel Francisco Cortes Sistema e dispositivo de impulsão e estabilidade de veleiro
WO2024207494A1 (zh) * 2023-04-03 2024-10-10 上海富勋实业有限公司 一种用于无人船的升降鳍板结构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110168071A1 (en) * 2007-02-08 2011-07-14 Baruh Bradford G System and method of adjusting the location and position of the foresail on a sailboat
US7509917B2 (en) * 2007-03-09 2009-03-31 Magnasail, Llc Apparatus and method to optimize sailing efficiency
US7784417B2 (en) * 2008-11-13 2010-08-31 Jensen Christian H Sailboat with a canting ballast system

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1491403A (fr) * 1966-06-27 1967-08-11 Dérive en deux parties relevables notamment pour yacht à voiles
DE2254205A1 (de) * 1972-11-06 1974-05-16 Helmut Fricke Boot mit ballast-kielflosse
US4044703A (en) * 1976-08-25 1977-08-30 Joel Kurtz Sailboat control apparatus
US4352335A (en) * 1977-09-16 1982-10-05 Sugden Keith C Yacht keels
FR2563177A1 (fr) * 1984-04-18 1985-10-25 Langevin Sylvestre Profils hydroporteurs escamotables et articules destines a diminuer la trainee d'un flotteur
WO1988009286A1 (en) * 1987-05-27 1988-12-01 Houdt Wilhelmus Aloysius Maria Fin, keel, or leeboard for sailing vessels, boats and surf boards equipped with a sail
DE3939014A1 (de) * 1989-11-25 1991-05-29 Zuehlke Ernst W Dipl Ing Fh Antriftkiel fuer segelwasserfahrzeuge
FR2658477A1 (fr) * 1990-02-20 1991-08-23 Merville Pierre Quille de bateau escamotable.
NL9002629A (nl) * 1990-11-30 1992-06-16 Hobert Fintechnology Kiel of zwaard voor zeilvaartuigen.
DE4340028A1 (de) * 1993-11-24 1995-06-01 Zuehlke Ernst W Dipl Ing Fh Antriftfahrt-System für windangetriebene Schiffe
NL1002124C2 (nl) * 1996-01-19 1997-07-22 Lumiflex Precision Engineering Kiel voor een zeilvaartuig.
FR2807999A1 (fr) * 2000-04-25 2001-10-26 Yves Kinard Dispositif destine a faire varier le tirant d'eau d'un navire avec comme corollaire de disposer d'une quille pendulaire augmentant le moment de stabilite

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3903827A (en) * 1974-07-15 1975-09-09 Paul M Marcil Non-heeling hull assembly
US5152238A (en) * 1991-08-27 1992-10-06 Page Robert L Split-hinged, winged, self-cradling shallow draft keel for sailing vessel
AT405393B (de) * 1997-01-24 1999-07-26 Frantl Conprojekt Kieleinrichtung für ein segelschiff

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1491403A (fr) * 1966-06-27 1967-08-11 Dérive en deux parties relevables notamment pour yacht à voiles
DE2254205A1 (de) * 1972-11-06 1974-05-16 Helmut Fricke Boot mit ballast-kielflosse
US4044703A (en) * 1976-08-25 1977-08-30 Joel Kurtz Sailboat control apparatus
US4352335A (en) * 1977-09-16 1982-10-05 Sugden Keith C Yacht keels
FR2563177A1 (fr) * 1984-04-18 1985-10-25 Langevin Sylvestre Profils hydroporteurs escamotables et articules destines a diminuer la trainee d'un flotteur
WO1988009286A1 (en) * 1987-05-27 1988-12-01 Houdt Wilhelmus Aloysius Maria Fin, keel, or leeboard for sailing vessels, boats and surf boards equipped with a sail
DE3939014A1 (de) * 1989-11-25 1991-05-29 Zuehlke Ernst W Dipl Ing Fh Antriftkiel fuer segelwasserfahrzeuge
FR2658477A1 (fr) * 1990-02-20 1991-08-23 Merville Pierre Quille de bateau escamotable.
NL9002629A (nl) * 1990-11-30 1992-06-16 Hobert Fintechnology Kiel of zwaard voor zeilvaartuigen.
DE4340028A1 (de) * 1993-11-24 1995-06-01 Zuehlke Ernst W Dipl Ing Fh Antriftfahrt-System für windangetriebene Schiffe
NL1002124C2 (nl) * 1996-01-19 1997-07-22 Lumiflex Precision Engineering Kiel voor een zeilvaartuig.
FR2807999A1 (fr) * 2000-04-25 2001-10-26 Yves Kinard Dispositif destine a faire varier le tirant d'eau d'un navire avec comme corollaire de disposer d'une quille pendulaire augmentant le moment de stabilite

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1739004A1 (de) * 2005-07-01 2007-01-03 Gianfranco Bianchi Faltbarer Senkkiel für Segelboote
FR2940781A1 (fr) * 2009-01-07 2010-07-09 Georges Cascarino Dispositif de correction de la gite d'une embarcation
WO2010098726A3 (en) * 2009-02-25 2011-06-30 Grom Tomaz Keel and sailing vessel incorporating such keel
WO2017083947A1 (pt) * 2015-11-18 2017-05-26 Chaves Manoel Francisco Cortes Sistema e dispositivo de impulsão e estabilidade de veleiro
WO2024207494A1 (zh) * 2023-04-03 2024-10-10 上海富勋实业有限公司 一种用于无人船的升降鳍板结构

Also Published As

Publication number Publication date
US20040194683A1 (en) 2004-10-07

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