EP1611003A1 - Rotable axis to which the mast, centreboard, winches are connected - Google Patents

Rotable axis to which the mast, centreboard, winches are connected

Info

Publication number
EP1611003A1
EP1611003A1 EP04722921A EP04722921A EP1611003A1 EP 1611003 A1 EP1611003 A1 EP 1611003A1 EP 04722921 A EP04722921 A EP 04722921A EP 04722921 A EP04722921 A EP 04722921A EP 1611003 A1 EP1611003 A1 EP 1611003A1
Authority
EP
European Patent Office
Prior art keywords
mast
mechanical axis
spar
polar
watercraft
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Withdrawn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
EP04722921A
Other languages
German (de)
French (fr)
Inventor
Riccardo Nannini
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 EP1611003A1 publication Critical patent/EP1611003A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H9/00—Marine propulsion provided directly by wind power
    • B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
    • B63H9/08—Connections of sails to masts, spars, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B15/00—Superstructures, deckhouses, wheelhouses or the like; Arrangements or adaptations of masts or spars, e.g. bowsprits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B15/00—Superstructures, deckhouses, wheelhouses or the like; Arrangements or adaptations of masts or spars, e.g. bowsprits
    • B63B15/02—Staying of masts or of other superstructures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
    • B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
    • B63B43/04—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H9/00—Marine propulsion provided directly by wind power
    • B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
    • B63H9/06—Types of sail; Constructional features of sails; Arrangements thereof on vessels

Definitions

  • This invention relates to sailing equipment. More specifically, it relates to a device able to facilitate manoeuvring, allowing the mast to be disengaged from the bottom of the watercraft.
  • the problem is particularly noticeable when sailing close to the wind to the extent that there is a critical angle (direction of the watercraft/wind direction) below which it is impossible to proceed.
  • This invention aims to resolve the aforementioned problem improving the manoeuvrability of watercraft fitted with sails such as sailing boats and catamarans.
  • Fig. 1 shows the polar mechanical axis in accordance with the invention
  • Fig. 2 shows a top view of a watercraft fitted with the polar mechanical axis in accordance with the invention.
  • Fig. 3 shows a side view of the watercraft depicted in Fig. 2 with the relating sails.
  • Fig. 4 (a and b) shows two detail views of the device in accordance with the invention.
  • Fig. 5 shows the possible mast movements using the device in accordance with the invention.
  • Figure 1 shows the polar mechanical axis (10) in accordance with the invention.
  • Said device consists of a spar (11 ) that is free to rotate and is solidly connected with the mast (15).
  • the spar (11 ) rotates thanks to ball bearings (12), which are housed inside at least two brackets (13) for fastening the spar (11 ) to the bottom (14) of the watercraft.
  • the different ball bearings feature retainers to prevent them from sliding along the spar (11 ).
  • devices are fitted and solidly connected for adjusting the sails; these devices may include two or more winches (16), one or more rope stoppers (17), and one or more rings (for example, downhaul) (18).
  • All said devices comprise a hollow cylindrical coupling (19), which is integral and perforated (20), for fastening to the spar (11 ) with appropriate mechanical fastening means (for example, pins or screws and bolts).
  • appropriate mechanical fastening means for example, pins or screws and bolts.
  • the rope stopper (17) can consist of a raised surface (17'), connected with the coupling (19) by means of an arm (19'), to which are fastened the actual rope stoppers (17") required for manoeuvring and the rings (17"') for sliding the ropes of the boom.
  • the winches can be arranged similarly, i.e. on a raised surface (16') connected with the relating coupling by means of an arm (19').
  • the centre of the mast (15) is solidly joined with the spar (11 ); the bottom of said mast forms a single body with the centreboard (21 ) that ends in a bulb (22).
  • the bottom of the mast, where it is crossed by the spar (11 ) comprises another articulated joint for bending the mast on the port side or on the starboard side; thus, this joint allows the mast to be positioned differently in relation to the centreboard (and, hence, the bulb).
  • the mast (15) is solidly connected with the spar (11 ); the centreboard (21 ) forks at the bottom of the mast (15) and there are two circular flanges housing two ball bearings (23) in the central hole of which the spar (11 ) passes; while the mast (15) slots into the fork (see Figure 4b).
  • a crown (24) that is perforated to allow the passage of the spar (11 ). Said crown (24) engages with appropriate reduction gears (25) positioned at the bottom of the mast (15) (see Figure 4a).
  • the crank (26) can be used to move the centreboard (and, thus, the bulb) in relation to the mast even when the centreboard and the bulb are quite heavy
  • the mast (15) comprises a hinge positioned, preferably, between the crank (26) and the attachment of the shrouds
  • Said hinge may consist of, for example, a bush with pivot pin (28) and allows the mast to tilt towards the stern or towards the bow, manoeuvring with the relating winches positioned on the spar (11 ).
  • the spar and mast assembly is attached to the bottom by means of brackets (13) that are solidly connected with the floors.
  • the bottom features a pit (29), preferably rectangular, that allows the bottom of the aforementioned assembly to be immerged in water.
  • said pit has four bulwarks (30) to prevent any seawater from entering.
  • each of the two opposite bulwarks in the stern / bow direction will obviously have a hole, with the relating ball bearing, to allow the passage of the spar (1 1 ); furthermore, said holes may be equipped with a stuffing box (31 ) to guarantee watertightness.
  • the mast (15) and the centreboard (21 ) - with the relating bulb (22) - are not positioned coaxially as shown in Fig. 1 and, thus, do not form a single unit as described above.
  • the mast (15) is solidly connected with the polar mechanical axis
  • brackets (13) two positioned at the end of the stern and bow of the bottom, respectively, and the other two immediately outside the bulwarks (30).
  • the shroud system must be modified. Particularly, the stern backstay and the bow stay are fastened to the rings (31 ) placed at the two ends of the spar (11 ).
  • the bottom of the mast i.e. the part included between the spar (11 ) and the first crosstree (32), is made of material able to offer the maximum resistance to stress
  • the top is made of light materials (for example, carbon fibre).
  • the lighter top part can be bayonet fitted into the bottom resistant part and secured with appropriate fastening means (for example, screws and bolts).
  • the shrouds at the top of the mast will be positioned and fastened as usual; however, they are not attached at the bottom to the deck as usual but to the mast (15) in the section (27) included between the first crosstree and the reduction gears (25).
  • the above described device particularly, the mast, sails, centreboard, winches (i.e. the entire motor structure of the boat) - forms a single unit that works independently from the bottom, whish serves as a float able to support the watercraft with the relating movement over the surface of the water.
  • the bottom (14) can be fitted with appropriate outside bulwarks (30').
  • Figure 3 shows the sails of a watercraft fitted with a polar mechanical axis in accordance with the invention.
  • a jib (33) similar to a spanker - with boom (35) down - and a small riding boom (34) at the height of the last crosstree that is kept perpendicular to the mast by two horizontal ties (that are tied to the ends of the crosstree) and by a vertical tie that attaches the tip of the small riding boom to the mast.
  • This small riding boom (34) pushes forward the stay (36), allowing the jib to operate similarly to a spanker placed before the mast.
  • being able to tilt the mast means that the bottom does not tilt and, thus, remains perfectly parallel to the surface of the water and does not loose speed. It is also possible to fit the watercraft with a flat bottom (like on windsurfs): this creates a gliding effect on the water that further increases speed. Finally, it is not longer necessary to make the watercraft with a narrow bow (as in the case of known watercraft); thus, the bow can be rounded making available a space that can be used, for example, to construct a deckhouse or other type of shelter - which are items particularly appreciated on pleasure boats.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

A device for watercraft (10) fitted with sails for keeping the mast (15) disengaged from the bottom to facilitate all sailing manoeuvres. The device comprises a polar mechanical axis consisting of a free-to-rotate spar (11) to which the mast (15), centreboard, winches, rope stoppers and any other rings for fastening the rigging are solidly connected.

Description

ROTABLE AXIS TO WHICH THE MAST, CENTREBOARD, WINCHES ARE CONNECTED
Technical Field
This invention relates to sailing equipment. More specifically, it relates to a device able to facilitate manoeuvring, allowing the mast to be disengaged from the bottom of the watercraft.
Background Art
The rigidity of the mast unit - i.e. the mast, bottom, and keel assembly - hinders manoeuvrability of sailing vessels using the sails only.
The problem is particularly noticeable when sailing close to the wind to the extent that there is a critical angle (direction of the watercraft/wind direction) below which it is impossible to proceed.
This invention aims to resolve the aforementioned problem improving the manoeuvrability of watercraft fitted with sails such as sailing boats and catamarans. Objects and Brief Description of the Invention
It is an object of this invention to provide a device, hereinafter called the "polar mechanical axis", consisting of a free-to-rotate spar to which the mast, centreboard, winches, rope stoppers, and any other rings for fastening the rigging are solidly connected. Description of the Drawings
Fig. 1 shows the polar mechanical axis in accordance with the invention
Fig. 2 shows a top view of a watercraft fitted with the polar mechanical axis in accordance with the invention.
Fig. 3 shows a side view of the watercraft depicted in Fig. 2 with the relating sails. Fig. 4 (a and b) shows two detail views of the device in accordance with the invention.
Fig. 5 shows the possible mast movements using the device in accordance with the invention.
Detailed Description of the Invention Figure 1 shows the polar mechanical axis (10) in accordance with the invention.
Said device consists of a spar (11 ) that is free to rotate and is solidly connected with the mast (15). The spar (11 ) rotates thanks to ball bearings (12), which are housed inside at least two brackets (13) for fastening the spar (11 ) to the bottom (14) of the watercraft. Ideally, the different ball bearings feature retainers to prevent them from sliding along the spar (11 ). Along said spar (11 ), devices are fitted and solidly connected for adjusting the sails; these devices may include two or more winches (16), one or more rope stoppers (17), and one or more rings (for example, downhaul) (18). All said devices comprise a hollow cylindrical coupling (19), which is integral and perforated (20), for fastening to the spar (11 ) with appropriate mechanical fastening means (for example, pins or screws and bolts). When said means are inserted into the holes (20), they fit into the corresponding holes in the spar (11 ); obviously, the spar (11 ) has several holes along its length in order to fit the different devices according to sail manoeuvring needs. The rope stopper (17) can consist of a raised surface (17'), connected with the coupling (19) by means of an arm (19'), to which are fastened the actual rope stoppers (17") required for manoeuvring and the rings (17"') for sliding the ropes of the boom.
The winches can be arranged similarly, i.e. on a raised surface (16') connected with the relating coupling by means of an arm (19'). The centre of the mast (15) is solidly joined with the spar (11 ); the bottom of said mast forms a single body with the centreboard (21 ) that ends in a bulb (22). In a particular version of the invention, the bottom of the mast, where it is crossed by the spar (11 ), comprises another articulated joint for bending the mast on the port side or on the starboard side; thus, this joint allows the mast to be positioned differently in relation to the centreboard (and, hence, the bulb).
In this version of the invention, the mast (15) is solidly connected with the spar (11 ); the centreboard (21 ) forks at the bottom of the mast (15) and there are two circular flanges housing two ball bearings (23) in the central hole of which the spar (11 ) passes; while the mast (15) slots into the fork (see Figure 4b). At the top of the centreboard (21 ), and solidly connected with it, there is a crown (24) that is perforated to allow the passage of the spar (11 ). Said crown (24) engages with appropriate reduction gears (25) positioned at the bottom of the mast (15) (see Figure 4a).
The crank (26) can be used to move the centreboard (and, thus, the bulb) in relation to the mast even when the centreboard and the bulb are quite heavy
(thanks to the reduction gears, 25). Furthermore, in another version of the invention, the mast (15) comprises a hinge positioned, preferably, between the crank (26) and the attachment of the shrouds
(27). Said hinge may consist of, for example, a bush with pivot pin (28) and allows the mast to tilt towards the stern or towards the bow, manoeuvring with the relating winches positioned on the spar (11 ). The spar and mast assembly is attached to the bottom by means of brackets (13) that are solidly connected with the floors.
In the midpoint, where the mast and the centreboard are found, the bottom features a pit (29), preferably rectangular, that allows the bottom of the aforementioned assembly to be immerged in water. Ideally, said pit has four bulwarks (30) to prevent any seawater from entering.
Each of the two opposite bulwarks in the stern / bow direction will obviously have a hole, with the relating ball bearing, to allow the passage of the spar (1 1 ); furthermore, said holes may be equipped with a stuffing box (31 ) to guarantee watertightness. In a particular version of the invention, the mast (15) and the centreboard (21 ) - with the relating bulb (22) - are not positioned coaxially as shown in Fig. 1 and, thus, do not form a single unit as described above.
In this version, the mast (15) is solidly connected with the polar mechanical axis
(10) in a position closer to the bow of the watercraft; while the centreboard (21 ), with the relating bulb (22), is connected with the polar mechanical axis at the barycentre of the watercraft. Obviously, in this case, the pit (29) is found in the barycentre.
Preferably, there are four brackets (13): two positioned at the end of the stern and bow of the bottom, respectively, and the other two immediately outside the bulwarks (30).
Considering the described polar mechanical axis, the shroud system must be modified. Particularly, the stern backstay and the bow stay are fastened to the rings (31 ) placed at the two ends of the spar (11 ).
The bottom of the mast, i.e. the part included between the spar (11 ) and the first crosstree (32), is made of material able to offer the maximum resistance to stress
(for example, steel), while the top is made of light materials (for example, carbon fibre).
If preferred, the lighter top part can be bayonet fitted into the bottom resistant part and secured with appropriate fastening means (for example, screws and bolts).
The shrouds at the top of the mast will be positioned and fastened as usual; however, they are not attached at the bottom to the deck as usual but to the mast (15) in the section (27) included between the first crosstree and the reduction gears (25).
From the aforesaid and as shown in Figure 5, the above described device - particularly, the mast, sails, centreboard, winches (i.e. the entire motor structure of the boat) - forms a single unit that works independently from the bottom, whish serves as a float able to support the watercraft with the relating movement over the surface of the water. Obviously, if preferred, the bottom (14) can be fitted with appropriate outside bulwarks (30').
Figure 3 shows the sails of a watercraft fitted with a polar mechanical axis in accordance with the invention. As the figure shows, it is possible to use a jib (33) similar to a spanker - with boom (35) down - and a small riding boom (34) at the height of the last crosstree that is kept perpendicular to the mast by two horizontal ties (that are tied to the ends of the crosstree) and by a vertical tie that attaches the tip of the small riding boom to the mast. This small riding boom (34) pushes forward the stay (36), allowing the jib to operate similarly to a spanker placed before the mast.
To place the small riding boom (34) before, tighten a rope from the first crosstree to the ring of the downhaul of the riding boom (18) in order to secure the mast; then, the loosen the stay to insert the small riding boom in the last crosstree; and, finally, tighten the staysail and the remove the safety rope.
The advantages of this invention are obvious.
Firstly, being able to tilt the mast means that the bottom does not tilt and, thus, remains perfectly parallel to the surface of the water and does not loose speed. It is also possible to fit the watercraft with a flat bottom (like on windsurfs): this creates a gliding effect on the water that further increases speed. Finally, it is not longer necessary to make the watercraft with a narrow bow (as in the case of known watercraft); thus, the bow can be rounded making available a space that can be used, for example, to construct a deckhouse or other type of shelter - which are items particularly appreciated on pleasure boats.

Claims

1. A polar mechanical axis for watercraft (10) consisting of a free-to-rotate spar (11 ) to which the mast, centreboard, winches, rope stoppers, and any other rings for fastening the rigging are solidly connected.
2. A polar mechanical axis as claimed in claim 1 where the rotation of the spar (11 ) occurs by means of ball bearings (12), which are housed inside at least two brackets (13) for fastening the spar (11 ) to the bottom (14) of the watercraft.
3. A polar mechanical axis as claimed in claims 1 and 2 where said winches, rope stoppers, and any other rings comprise a hollow cylindrical coupling (19), which is integral and perforated (20), for fastening to the spar (11 ) with appropriate mechanical fastening means that fit into the holes (20) and then fit into the corresponding holes found in the spar (11 ).
4. A polar mechanical axis as claimed in one or more of the above claims where the rope stoppers (17") and/or the winches (16) are arranged on a raised surface (17' and 16', respectively) connected with the coupling (19) by means of an arm (19').
5. A polar mechanical axis as claimed in claims 1 to 4 where the mast (15) is solidly joined with the spar (11 ) in the centre and comprises a bottom that forms a single body with the centreboard (21 ) and its connected bulb (22).
6. A polar mechanical axis as claimed in claim 5 where the bottom of the mast (15), where it is crossed by the spar (11 ), comprises another articulated joint for bending the mast on the port side or on the starboard side.
7. A polar mechanical axis as claimed in claim 6 where the centreboard (21 ) forks at the bottom of the mast (15) and there are two circular flanges housing two ball bearings (23) in the central hole of which the spar (11 ) passes; while the mast (15) slots into the fork.
8. A polar mechanical axis as claimed in claim 7 comprising a reduction device consisting of a crown (24), solidly connected with the top of the centreboard (21 ) and perforated to enable the passage of the spar (11 ), that engages with appropriate reduction gears (25) positioned at the bottom of the mast (15) and movable by means of a crank (26).
. A polar mechanical axis as claimed in claims 1 to 8 where the mast (15) comprises a hinge (28) that allows the mast to tilt towards the stern or towards the bow, manoeuvring with the relating winches positioned on the spar (11).
10. A polar mechanical axis as claimed in claim 1 to 4 where the mast (15) is solidly connected with the polar mechanical axis in a position closer to the bow, while the centreboard (21), with the relating bulb (22), is connected with the polar mechanical axis at the barycentre of the watercraft; in this point, the pit (29) is found.
11.A polar mechanical axis as claimed in claim 10 where the mast (15) comprises a hinge (28) that allows the mast to tilt towards the stern or towards the bow, manoeuvring with the relating winches positioned on the spar (11).
12. A polar mechanical axis as claimed in claims 1 to 11 where the bottom of the mast, i.e. the part included between the spar (11) and the first crosstree (32), is made of material able to offer the maximum resistance to stress, while the top is made of light materials.
13. A polar mechanical axis as claimed in claim 12 where said top part is bayonet fitted into the bottom resistant part and secured with appropriate fastening means.
14. A watercraft bottom (14) comprising a pit (29) for immerging in water the polar mechanical axis in accordance with claims 1 - 13.
15. A bottom as claimed in claim 14 where said pit comprises four bulwarks (30) to prevent seawater from entering.
16. A watercraft comprising a polar mechanical axis as claimed in claims 1 to 13 and a bottom as claimed in claims 14 and 15.
17. A watercraft as claimed in claim 16 where said watercraft is a sailing boat or a catamaran.
EP04722921A 2003-03-26 2004-03-24 Rotable axis to which the mast, centreboard, winches are connected Withdrawn EP1611003A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000076A ITFI20030076A1 (en) 2003-03-26 2003-03-26 POLAR MECHANICAL AXIS FOR SAILBOATS
PCT/IB2004/001081 WO2004085237A1 (en) 2003-03-26 2004-03-24 Rotable axis to which the mast, centreboard, winches are connected

Publications (1)

Publication Number Publication Date
EP1611003A1 true EP1611003A1 (en) 2006-01-04

Family

ID=33042685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04722921A Withdrawn EP1611003A1 (en) 2003-03-26 2004-03-24 Rotable axis to which the mast, centreboard, winches are connected

Country Status (3)

Country Link
EP (1) EP1611003A1 (en)
IT (1) ITFI20030076A1 (en)
WO (1) WO2004085237A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITFI20040262A1 (en) * 2004-12-13 2005-03-13 Riccardo Nannini DEVICE FOR SAILING COMPANIES INCLUDING AN OSCILLATING TREE AND A POLAR AXIS
GB0806892D0 (en) * 2008-04-16 2008-05-21 Barton Michael D L Sailign vessel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972300A (en) * 1974-05-28 1976-08-03 Adamski Leo J Sailing craft
FR2323574A1 (en) * 1975-09-09 1977-04-08 Los Rios Pierre De Pivoted mast for sailing vessel with pivoted keel - gives improved stability permitting wider hull in multi hull design
GB2187152A (en) * 1986-02-21 1987-09-03 Robert Colin Harvey Webb A stabilising device for sailing boats
US5280760A (en) * 1991-12-02 1994-01-25 Edwards Jesse B Sailing craft
US5603277A (en) * 1994-04-08 1997-02-18 Webb; William B. Tack aback sailboat

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004085237A1 *

Also Published As

Publication number Publication date
ITFI20030076A1 (en) 2004-09-27
WO2004085237A1 (en) 2004-10-07

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