Tiller

Abstract

The present invention relates to a tiller (10) for a boat and in particular a sailboat, which tiller comprises a base section (12) arranged to be attached to a rudder or a rudder stock of a boat, a tiller extension (56) provided with a free end that a person will grip when steering the boat,—an articulated section (16) provided between the base section (12) and the tiller extension (56) and having a generally vertical turning axis (30, 44; 208; 324), in order to angle the tiller extension in relation to the base section, and—a releasable locking mechanism (36, 50; 90, 92, 94; 206, 216, 224; 336, 338) for releasably locking the tiller extension in different angles in relation to the base section.

Description

TECHNICAL AREA

[0001] The present invention relates to a tiller for in particular sailboats.BACKGROUND OF INVENTION

[0002] Boats with rudders, such as sail boats, are either provided with steering wheels or tillers connected to the rudders for steering the boat. On larger sailboats provided with steering wheels, these are either relatively small and therefore hard to reach if the helmsman wants to be positioned on side of the boat. Alternatively, the steering wheels are very large in diameter or two steering wheels are provided on each side of the boat so that the helmsman is able to steer the boat when positioned on the side of the boat. The drawback with large steering wheels is that they tend to block movement in the cockpit because the steering wheel by necessity is positioned transversal to the length of the boat. Two steering wheels requires a relatively complex and expensive arrangement.

[0003] For sailboats with tillers, a tiller extension is often used so that the helmsman can leave the tiller and move to the side of the boat for steering. The tiller extensions work generally well in good weather and wave conditions. However, in rough weather with high winds and high waves, the forces on the rudder are strong and they change direction, especially in high waves, and the tiller extensions, with its free joint, gives less control for handling these forces in a safe way, especially on larger boats. The reason for the free joint is to allow for various helmsman positions.

[0004] One cause for the design of the tiller extensions is that the tiller extensions are designed to be light and slender to be easy to handle when the helmsman moves from one side of the boat to the other. The drawbacks of the tiller extensions force the helmsman to move down into the cockpit in such weather and wave conditions, whereby the helmsman is in a much worse position regarding viewing of the sails as well as the surroundings such as other boats and rocks in the water.

[0005] There is thus room for improvements in this technical field.BRIEF DESCRIPTION OF INVENTION

[0006] The aim of the present application is to provide an improved tiller. The aim is obtained with a tiller having the features according to the independent patent claims. Preferable embodiments of the tiller form the subject of the dependent patent claims. According to one aspect of the invention, it comprises a tiller for a boat and in particular a sailboat, which tiller may comprise a base section arranged to be attached to a rudder or a rudder stock of a boat, a tiller extension provided with a free end that a person will grip when steering the boat, and an articulated section provided between the base section and the tiller extension that may have a generally vertical turning axis, in order to angle the tiller extension in relation to the base section, and a releasable locking mechanism for releasably locking the tiller extension in different angles in relation to the base section.

[0007] With this solution, the tiller may be adjusted such that a helmsman can be placed closer to the side of the boat, providing good views of both the surrounding sea and also the sails, while still having the sturdiness and firm contact with the rudder as a conventional straight tiller, and without the drawbacks of the conventional tiller extensions.

[0008] According to a further aspect, two elements may be provided with the turning axis that may be attached to one of the base section and the tiller extension, and one part may be provided with the turning axis and may be positioned between the two elements and attached to the other of the base section and the tiller extension. The articulated section is then provided with a sturdy joint that is capable of handling forces on the tiller with a good force distribution.

[0009] Further, the releasable locking mechanism may comprise a number of form-locking elements provided on the two elements, and may comprise a movable locking element provided on the one part and arranged to releasably engage with the form-locking elements. This provides a secure locking of the articulated section and a good force distribution between the parts. Regarding the locking function, the movable locking element may be provided with spring means for urging the locking element in engagement with the form-locking elements. This enables a locking engagement as long as the locking element is not operated.

[0010] According to a further aspect, the form-locking elements may comprise inwardly directed cogs along an inner circumference and wherein the locking element may comprise a cog wheel with outwardly directed cogs, which locking element is movable between a locked position wherein both form-locking elements are in engagement with the locking element and a released position wherein one of the form-locking elements are out of engagement with the locking element.

[0011] According to yet an aspect, the form-locking elements may comprise conical protrusions and / or conical recesses, and wherein the locking element may comprise conical protrusions and / or conical recesses, which locking element is movable between a locked position wherein the form-locking elements are in engagement with the locking element and a released position wherein the form-locking elements are out of engagement with the locking element. In this regard, the locking element is movable in the direction of the turning axis.

[0012] A release mechanism may further be provided and operably connected to the locking mechanism and provided with a manoeuvring element. Thus, the manoeuvring element will allow release of the locking element and thereby an adjustment of the articulated section. Preferably, the manoeuvring element may be positioned at the free end of the tiller extension for easy access for the helmsman.

[0013] As a further feature, the tiller extension may comprise two sections slidable in relation to each other for adjusting the length of the tiller extension. This enables the tiller to be adjusted in several ways depending on where in the boat the helmsman is positioned as well as any change in position of the helmsman. Preferably, the tiller extension further may comprise a locking mechanism for releasably locking the two sections to each other.

[0014] In order to further provide a good handling of the tiller when steering, it may further comprise a handle attached to the free end of the tiller extension. In this regard, the attachment of the handle may provide a releasable locking of the handle in different angular positions in relation to the tiller extension.

[0015] These and other aspects of, and advantages with, the present invention will become apparent from the following detailed description of the invention and from the accompanying drawings.BRIEF DESCRIPTION OF DRAWINGS

[0016] In the following detailed description of the invention, reference will be made to the accompanying drawings, of which

[0017] FIG. 1 shows a perspective view of an embodiment of a tiller according to the invention,

[0018] FIG. 2 shows a perspective view of a variant of the tiller of FIG. 1,

[0019] FIG. 3 shows the tiller of FIG. 2 with items removed,

[0020] FIGS. 4-6 show detailed views of an articulated section comprised in the tiller according to the invention,

[0021] FIG. 7 shows a cross-sectional view of a release mechanism of the articulated section according to an embodiment of the invention,

[0022] FIGS. 8-10 show detailed views of another embodiment of a release mechanism,

[0023] FIG. 11 shows a detailed view of a further embodiment of a release mechanism, and

[0024] FIGS. 12-20 show a further embodiment of a tiller according to the invention provided with a telescopic function,

[0025] FIG. 21 shows a tiller according to FIG. 1 provided with an extension for connection of an autopilot,

[0026] FIG. 22 shows a tiller with a further embodiment of a joint,

[0027] FIGS. 23-24 are exploded views of the joint comprised in the tiller of FIG. 22,

[0028] FIG. 25 shows a perspective view of a manoeuvring pin comprised in the joint according to FIGS. 23 and 24,

[0029] FIGS. 26-27 show cross-sectional views of the joint of FIGS. 23 and 24 in an initial, locked, position,

[0030] FIGS. 28-29 show cross-sectional views of the joint in a release position, and

[0031] FIGS. 30-33 show exploded views of a further embodiment of a joint comprised in the tiller of FIG. 1 or FIG. 22.DETAILED DESCRIPTION OF THE INVENTION

[0032] One example of a tiller 10 according to the invention is shown in FIG. 1. It comprises a base section 12 provided with attachment elements for attachment to an upper part of a rudder or a rudder stock. The base section 12 is tubular and elongated with a cross-section that may be circular, oval, or rectangular. The base section 12 may preferably be attached to the rudder or the rudder stock with an articulate joint 14, providing the possibility of folding the tiller 10 from a generally horizontal position to a generally vertical position.

[0033] The tiller 10 is further provided with an articulated section 16 providing an articulated joint. As seen in FIGS. 4-6, the articulated section 16 comprises a first element 18 attached to the base section 12. The first element 18 comprises two plate members 20. Each plate member 20 has a generally circular part 22. A rectangular part 24 is attached to or made integral with the circular part 22 and has a width corresponding to the inner width of the tubular base section 12. A tubular spacer 26 is provided between the rectangular parts 24 of the first element 18 creating a distance between the plate members 20. The spacer 26 has a length such that the distance d between outer surfaces of the rectangular parts 24 corresponds to the inner height of the tubular base section 12. A screw is provided through the spacer 26 for holding the two plate members 20 together. A number of threaded bores 28 may be arranged in the rectangular parts 24, to be used with screws through passages in the base section 12.

[0034] Each circular part 22 has a central passage 30, forming the turning axis A of the articulated section 16. In an area of the circular part 22 opposite the rectangular parts 24, a cut-out 32 is provided in each of the circular parts 22. The cut-out 32 has a shape of a sector with a side surface towards the periphery of the circular part provided with ridges 34 and recesses 36 with a shape generally corresponding to a cog wheel and forming form-locking elements. Two tubular spacers 38 are further arranged between the circular parts 22, having the same length as the spacer 26 between the rectangular parts 24. Two screws are provided through the spacers 38 for attaching the plate members 20 to each other.

[0035] The articulated section 16 further comprises a second element 40. The second element 40 is provided with a generally circular body 42. The circular body 42 has a thickness somewhat smaller than the distance between the plate members 20 of the first element 18 to fit between the plate members 20. The circular body 42 has a central pin 44 that fits into the passages 30 of the plate members 20 of the first element 18. The pin 44 preferably is provided with a bearing on each side of the body 42, such as a ball bearing or a plain bearing. This enables the second element 40 to be turned in relation to the first element 18 around the axis A. The circular body 42 is further provided with arc-shaped cut-outs 46 for accommodating the spacers 38 between the circular parts 22 of the first element 18.

[0036] The circular body 42 further has an elongated slit 48 that extends radially from the axis, the slit 48, forming a form-locking element. In the slit 48 a locking element 50 is arranged. The locking element 50 has a shape of a wedge or tooth, with a profile that corresponds to the recesses 36 of the sector-shaped cut-outs 32. The locking element 50 is movable in the slit 48 from a position where it is in engagement with the recesses 36 and to a position where it is out of engagement. A spring 52 is further provided, FIG. 7, seated in a bore 53 in the circular body 42 and in contact with the locking element 50, which urges the locking element 50 into engagement.

[0037] Since both plate members 20 are provided with the sector-shaped cut-outs 32, which the locking element 50 engages, there is an even force distribution on the articulated section 16.

[0038] The circular body 42 is further provided with two generally rectangular extensions 54 adjacent the slit 48. The extensions 54 are dimensioned to fit into a tiller extension 56 having a generally hollow elongated body. The articulated section 16 is further provided with two cylindrical cups or covers 58, FIG. 6, where only one is showing, attached to either side of the first and second element for protecting the articulated joint and the locking mechanism. However, the covers 58 are provided with cut-away sections 60 for enabling the articulated movement between the first and the second element. Preferably, gaskets 61 are provided between the circular body 42 and circular parts 22 for reducing friction and providing a sealing function. The gaskets are in this regard provided with appropriate cut-outs 63 corresponding to the cut-outs 32 in the circular parts 22.

[0039] The free end of the tiller extension 56 may further be provided with a handle 62 for a helmsman, FIGS. 1-3. In the shown embodiment, the handle 62 is ring-shaped and with a circular cross-section. The free end of the tiller extension 56 may be provided with a fixing element 64 that may have a semi-circular recess corresponding to the diameter of the handle 62. A friction-locking plate 66 is attached between the handle 62 and the fixing element 64, enabling the handle to be set in different angular positions upwards and downwards in relation to the tiller extension 56. Suitable locking elements, such as screws may be arranged for attaching the friction-locking plate 66 and thereby lock the handle 62 in the different angle positions.

[0040] Further, a release mechanism may be provided. It may comprise a manoeuvring element 68, in the embodiment shown a push button, FIG. 2. The push button 68 is connected to a push rod 70 that runs inside the tiller extension 56. The push rod 70 extends through the two rectangular extensions 54 and the inner end of the push rod 70 is in contact with the locking element 50 as seen in FIG. 7, enabling movement of the locking element 50 in relation to the form-locking recesses 36 for disengaging the locking element 50 from the circular parts 22. This in turn enables the tiller extension 56 to be turned in relation to the base section 12 around the axis A.

[0041] Within the scope of the invention, the release mechanism may have different designs. For instance, instead of a push button, a turning handle may be used at the free end of the tiller extension for moving the push rod to act on the locking element. One example is shown in FIGS. 8-10. Here a turning knob 80 is placed at the free end of the tiller extension 56, connected to a rod 82 that extends into the articulated section. The inner end of the rod 82 is arranged with a protrusion 84 provided with a cam surface 86. When the knob 80 and thus the rod 82 are turned, the cam surface 86 will act on the locking element 50 to move it out of engagement with the recesses 36 of the circular parts 22. In order to prevent turning in the opposite direction, a stop protrusion 88 is positioned opposite the cam surface 86 and placed on the side of the locking element 50. As a further alternative, a tilting handle may be used. It may be lifted for releasing the locking element and returned to a folded position for engagement.

[0042] As another alternative, the locking mechanism may be placed at the articulated section. As seen in FIG. 11, one of the first and the second parts 22, 42 may be arranged with a number of passages 90 arranged along a circle sector and one passage 92 in the other of the parts, and where a locking pin 94 may be pushed through the passages 90, 92 for locking the two parts in different angles. As a further alternative, a locking bolt may extend through the two parts. The locking bolt may be provided with a turning handle, such that the two parts are forced together and locked by friction. In this regard, surfaces of the first and second parts that are facing each other may be provided with friction enhancing material or patterns.

[0043] The tiller extension 56 may further be arranged in two sections 56′, 56″, FIGS. 12 and 13, hereafter named inner and outer sections, where the outer section 56″ has dimensions that fit into the inner section 56″ for providing a telescopic function. A locking mechanism is arranged between the two sections for locking the sections to each other in a length of the tiller extension chosen. In this aspect, the push rod is also designed telescopic so as to ensure the release function of the articulated section.

[0044] According to one example shown in FIGS. 14-19, a locking mechanism 100 comprises an end section 102 inserted into and attached to the inner end of the outer section 56″ of the tiller extension, FIG. 14. The outer section 56″ is provided with two generally circular passages 104 into which two locking balls 106 fit so as to protrude from the surface of the outer section 56″ but not as large as to fall out. Inside the outer section the balls 106 are placed in recesses 108 of a movable activator 110 operably connected to the release mechanism. The recesses 108 have an inner surface 112 that is inclined in relation to the longitudinal axis L of the section, as seen in FIG. 17. Further, the inner section 56′ is provided with a plurality of pairs of generally circular passages or recesses 11, FIG. 19, into which the balls fit, as will be described.

[0045] Further, springs 114 are arranged between the end section 102 and the activator 110 for urging the two parts from each other. The end section 102 is further provided with a circular passage 116. In the passage 116, a first elongated tubular element 118 is inserted. As seen in FIG. 14, the first element 118 has a generally circular cross-section with a diameter somewhat smaller than the diameter of the passage 116, providing a journaling of the first element 118 in the passage 116. However, the first element is further provided with two planar oppositely positioned surfaces. Further, the first element 118 is provided with an annular ledge 120 attached to the outer surface of the first element 118 and having rearwardly directed surfaces that are in contact with a forward directed surface of the activator 110 around the area of the passage, as seen in FIG. 18.

[0046] Inside the first element 118, a second elongated tubular element 122 is arranged, FIG. 16. The second element 122 has the same cross-sectional design as the first element but with measures to fit inside the first element 118, providing a telescopic function, and wherein the planar surfaces provide a rotational lock between the two elements. To the rear end of the second element 122, the locking element 50 is attached via a rod end 124, FIG. 10, fitting into the lower end of the second element. The unlocking of the articulated joint follows much the same manner as described above. Thus, by turning the knob 80, the first element 118 is turned, and due to the planar surfaces and the telescopic fit between the first and the second element, the second element 122 turns as well. This causes a release of the locking element 50 by the inclined surface 86 acting on the locking element 50, moving it out of engagement with the recesses 36.

[0047] Regarding the telescopic function, the two sections 56′, 56″ of the tiller extension are normally locked to each other in that the balls 106 are pressed against the inner surface of the inner section 56′ because of the springs 114 urging the activator 110 towards the free end of the tiller extension, which causes the inclined surfaces 112 of the recesses 108 to press on the balls 106, as seen in FIG. 17, as they are seated in the passages 113 of the inner section 56′, locking the both sections to each other in the lengthwise direction. When the length of the tiller extension is to be altered, the knob 80 is pressed and moved in the direction of the base section 12. This causes the first element 118 to move, and the second element 122 to slide inside the first element 118. Due to the annular ledge 120 on the outer surface of the first element 118, the movement of the first element 118 will cause the activator 110 to move towards the end section 102, against the force of the springs 114.

[0048] The movement of the activator 110 will move the recesses 108 in relation to the balls 106 and passages 104, so that the balls 106 are not pressed anymore by the inclined surfaces 112 but are free to move into the recesses 108, FIG. 19, and out of engagement with the passages 113 of the inner section, whereby the telescopic sections 56′, 56″ of the tiller extension are free to be moved relative each other, enabling a lengthening or shortening of the tiller extension. When the desired length has been almost adjusted, the knob 80 is released whereby the forces from the springs 114 will move the activator 110 back to its original position where the inclined surfaces 112 of the recesses 108 again press on the balls 106, and further movement of the outer section in relation to the inner section will cause the balls 106 to enter the passages of adjacent pairs of passages 113, thereby locking the telescopic sections.

[0049] The base section 12 may further be provided with an elongated extension 130, FIG. 21, preferably extending in the same direction as the base section 12 and preferably placed under the base section 12. The end of the extension 130 may be provided with attachment elements 132 for attaching an auto-pilot. This is an advantage in relation to attaching an auto-pilot directly to the tiller because now the tiller may be angled vertically so that it is out of the way in the cockpit.

[0050] The FIGS. 22-29 show a further embodiment of a tiller joint 200 comprised in the invention. It comprises a first element 202, FIGS. 23-24. The first element 202 is provided with an attachment 203 that fits into, and is attached to, a base section 12. The first element 202 has a cylindrical shape with a circumferential side wall 204. On the inside of the wall a circular toothed rack 206 is arranged with teeth facing towards the centre of the first element 202. An axle 208 is arranged protruding through the centre of the first element 202 and upwards. The axle 208 is preferably arranged with a cylindrical sliding bearing 210.

[0051] A second element 212 is further provided, attached to, or made integral with, a tiller extension 56. The second 212 element has also a cylindrical shape with a circumferential side wall 214. The upper end of the axle 208 extends into a seat in the centre of the second element 212. On the inside of the side wall 214 a circular toothed rack 216 is arranged with teeth facing inwards. The first element 202 is provided with an annular, upwards facing, protrusion 218 that is arranged to fit into an annular, downwards facing, groove 220 of the second element 212, thus providing a protection of the interior of the joint.

[0052] Further, a cog wheel 222 is placed inside the first and the second element, having a diameter so that its teeth 224 are meshing with the teeth of the toothed racks 206, 216 of the first and the second elements. The cog wheel 222 is provided with a passage 226 in its centre, having a diameter generally corresponding to the sliding bearing 210. The cog wheel 222 is provided with an upwards facing central hub 228 on an upper surface that fits into a circular recess 230 on a downward directed surface of the first element 202. The upper surface of the cog wheel 222 is further provided with a pin 232 at a radius from the centre. The pin 232 is arranged to fit into an arc-shaped groove 234 provided on the downward directed surface of the first element 202. The height of the cog wheel 222 is such that it can be moved vertically in relation to the first and the second elements. Further, the first element 202 is provided with three seats in which springs 238 are inserted. The springs 238 act on the underside of the cog wheel 222 to urge it upwards.

[0053] A circular cap 240 is arranged on the second element 212, provided with an annular side wall 242 that fits in an annular recess 244 on the second element 212. The cap 240 is further arranged with a number of downwardly directed pins 246 that protrude through passages 248 in the second element 212. The lower ends of the pins 246 are provided with enlargements 250 that are in contact with an upper surface of the cog wheel 222.

[0054] The second element 212 is further arranged with an attachment 252 having a shape so as to fit into a tiller extension tube. The attachment 252 is provided with a cylindrical passage 254. In the passage 254, a manoeuvring pin 256 is rotatably arranged. The manoeuvring pin 256 is provided with an annular protrusion 258 that fits in an annular recess 260 in the attachment 252, thereby providing a lock in the longitudinal direction of the manoeuvring pin 256. The outer end of the manoeuvring pin 256 is connected to a manoeuvring rod 262 that extends through the tiller extension. An outer end of the manoeuvring rod 262 is provided with a handle 264, FIG. 22, to enable turning of the manoeuvring rod 262. The inner end of the manoeuvring pin 256 is provided with a cut-out 266, FIG. 26, which cut-out 266 has a planar surface 268 that is in contact with the upper surface of the cog wheel 222.

[0055] The tiller joint 200 is intended to function as follows. When the joint 200 is in its initial, un-affected, state, FIGS. 26-27, the cog wheel 222 is urged upwards by the springs 238 so that it is in contact with the second element 212. In this position, the teeth 224 of the cog wheel 222 are in engagement with the toothed racks of both the first and the second elements, thereby locking the joint. The joint 200 can be activated and released for turning the second element in relation to the first element in two ways.

[0056] One way of activating the joint 200 is to turn the handle 264 of the manoeuvring rod 262, which in turn turns the manoeuvring pin 256, arrow I in FIG. 29. This will cause the edges of the cut-out 266 of the manoeuvring pin 256 to act on the cog wheel 222 and to move it downwards, against the force of the springs 238, FIGS. 28-29. The downward movement will cause the teeth 224 of the cog wheel 222 to move out of engagement with the toothed rack 216 of the second element 212, thereby enabling a turning of the tiller extension 56 and the second element 212 in relation to the base section 12 and the first element 202. Thus, the angle between the base section 12 and the tiller extension 56 can be adjusted. The angle is limited by the arc-shaped groove 234 of the second element 212 and the pin 232 of the cog wheel 222. When the desired angle is adjusted, the handle 264 of the manoeuvring rod 262 is released, whereby the manoeuvring pin 256 is turned back to its initial position and the cog wheel 222 is pushed back to its initial position by the springs 238, whereby the teeth 224 of the cog wheel 222 again are engaging the toothed rack 216 of the second element 212, locking the joint 200.

[0057] The second way of activating the joint 200 is by pushing the cap 240 downwards, arrow II in FIG. 29. The pins 246 of the cap 240 will then push the cog wheel 222 downwards whereby its teeth 224 move out of engagement with the toothed rack 216 of the second element 212. The joint 200 is now free to be adjusted as described above. When the desired angle is adjusted, the cap 240 is released, whereby the springs 238 move the cog wheel 222 into engagement with the second element 212.

[0058] FIGS. 30 to 33 show a further alternative of the locking function of a tiller joint 300. The basic design corresponds to the previous joint, with a first element 302 provided with an attachment 304 that is attached to the base section 12 and a second element 306 attached to the tiller extension 56. The first element 302 is provided with a circular recess 308 on its underside. A plurality of conically shaped protrusions 310 are placed in a circle in the recess 308, FIG. 32. At the centre of the recess 308, a passage 312 is provided. The passage 312 is semi-circular with to oppositely arranged sections that are straight. In the recess 308, a generally disc-shaped first connection element 314 is arranged. The first connection element 314 is provided with a plurality of conically shaped recesses 316 placed in a circle on its upper surface, FIG. 31. The number and the distance between the recesses 316 correspond to the number and the distance between the protrusions 310 of the first element 302, wherein the protrusions 310 engage with the recesses 316 when the first connection element 314 is in engagement with the first element 302, as will be described below. The first connection element 314 is further provided with a central post 318, FIG. 33, on its upper surface, which post 318 has a shape corresponding to the shape of the passage 312 of the first element 302, and thus fits in the passage 312, creating a form-lock. An upper surface of the post 318 is further provided with a central groove 320 having a flat bottom and parallel side walls. The first connection element 314 is further provided with a central passage 322 through which a turning shaft 324 extends. The turning shaft 324 is seated with one end in a lower lid 326 that is attached to a lower surface of the first element 302. A compression spring 327 is further provided between the lower lid 326 and the first connection element 314, surrounding the turning shaft 324.

[0059] The first element 302 is further provided with a circular recess 328 on its upper surface. In this recess 328 a disc-shaped second connection element 330 is fitted. The second connection element 330 has a central generally rectangular post 332 on its lower surface, FIG. 32. The rectangular 332 post has a shape and dimensions so that it fits in the groove 320 of the first connection element 314. The two connection elements 314, 330 are further attached to each other by appropriate means such as screws, the attached elements shown in FIG. 33. The upper surface of the second connection element 330 is provided with a central generally circular post 334. The second connection element 330 is further provided with a plurality of conically shaped protrusions 336 placed in a circle.

[0060] On a lower surface of the second element 306, a plurality of conical recesses 338 are arranged in a circle. The number and distance between the recesses 338 correspond to the number and distance of the protrusions 336 of the second connection element 330, wherein the protrusions 336 engage with the recesses 338 when the second connection element 330 is in engagement with the second element 306, as will be described below. The upper surface of the second connection element 330 is further provided with a pin 340 at a radius from the centre. The pin 340 is arranged to fit into an arc-shaped groove 342 provided on the downward directed surface of the second element 306. The second element 306 is provided with a central circular recess 344 in which the post 334 of the second connection element 330 fits. The recess 344 is provided with a passage 346 through which the turning shaft 324 extends. The free end of the turning shaft 324 is provided with threads for a securing nut 348, FIG. 31.

[0061] A circular cap 350 is arranged on the second element 306, provided with an annular side wall 352 that fits in an annular recess 354 on the second element 306. As with the previous embodiment, the cap 350 is further arranged with a number of downwardly directed pins 246 or screws that protrude through passages in the second element 306. The lower ends of the pins 246 are provided with enlargements or heads 250 that are in contact with an upper surface of the second connection element 330. Further, a compression spring 358 is provided between the cap 350 and the second element 306, surrounding the turning shaft 324, urging the cap 350 upwards.

[0062] As with the previous embodiment, the second element 306 is arranged with the attachment 252 having a shape so as to fit into a tiller extension tube. The attachment 252 is provided with a cylindrical passage 254. In the passage 254, the manoeuvring pin 256 is rotatably arranged, which is connected to the manoeuvring rod 262 that extends through the tiller extension 56. The inner end of the manoeuvring pin 256 is provided with a cut-out 266, which cut-out 266 has a planar surface 268 that is in contact with the upper surface of the second connection element 330.

[0063] The function of this embodiment is intended as follows. When the joint 300 is assembled and in an initial state, the compression spring 327 between the lower lid 326 and the first connection element 314 urges the first connection element 314 in engagement with the first element 302 and the second connection element 330 in engagement with the second element 306. Thus, due to the engagement the position of the joint is locked from turning. Further, due to the conical shape of the protrusions and the recesses of the connections, a very firm lock of the joint is obtained without any play between the parts.

[0064] As with the previous embodiment, the joint 300 may be operated in two ways. The first is to turn the handle 264 of the manoeuvring rod 262, which in turn turns the manoeuvring pin 256. This will cause the edges of the cut-out 266 of the manoeuvring pin 256 to act on the second connection element 330 and to move it downwards, against the force of the compression spring 327. Since the second connection element 330 is attached to the first connection element 314, the latter will also move downwards. The downward movement will cause the protrusions 336 of the second connection element 330 to move out of engagement with the recesses 338 of the second element 330 as well as the recesses 316 of the first connection element 314 to move out of engagement with the protrusions 310 of the first element 302, thereby enabling a turning of the tiller extension 56 and the second element 306 in relation to the base section 12 and the first element 302. Thus, the angle between the base section 12 and the tiller extension 56 can be adjusted. The angle is limited by the arc-shaped groove 342 of the second element 306 and the pin 340 of the second connection element 330. When the desired angle is adjusted, the handle 264 of the manoeuvring rod262 is released, whereby the manoeuvring pin 256 is turned back to its initial position and first and second connection elements are pushed back to their initial position by the compression spring 327, whereby the protrusions 336 of the second connection element 330 again are engaging the recesses 338 of the second element 330 as well as the recesses 316 of the first connection element 314 engaging the protrusions 310 of the first element 302, locking the joint 300.

[0065] The second way of activating the joint 300 is by pushing the cap 350 downwards. The pins 352 of the cap 350 will then push the second connection element 330 downwards whereby its protrusions 336 move out of engagement with the recesses 338 of the second element 330 as well as the recesses 316 of the first connection element 314 moving out of engagement with the protrusions 310 of the first element 302. The joint 300 is now free to be adjusted as described above. When the desired angle is adjusted, the cap 350 is released, whereby the compression spring 327 move the second connection element 330 into engagement with the second element 306 and the first connection element 314 into engagement with the first element 302.

[0066] Even though some of the elements in the embodiment described above comprise conical protrusions and other interacting elements comprise conical recesses, it is to be understood that the protrusions and the recesses may switch place on the elements, providing the same function.

[0067] It is to be understood that the embodiments described above and shown in the drawings are to be regarded only as non-limiting examples of the invention and that it may be modified in many ways within the scope of the patent claims.

Examples

Embodiment Construction

[0032]One example of a tiller 10 according to the invention is shown in FIG. 1. It comprises a base section 12 provided with attachment elements for attachment to an upper part of a rudder or a rudder stock. The base section 12 is tubular and elongated with a cross-section that may be circular, oval, or rectangular. The base section 12 may preferably be attached to the rudder or the rudder stock with an articulate joint 14, providing the possibility of folding the tiller 10 from a generally horizontal position to a generally vertical position.

[0033]The tiller 10 is further provided with an articulated section 16 providing an articulated joint. As seen in FIGS. 4-6, the articulated section 16 comprises a first element 18 attached to the base section 12. The first element 18 comprises two plate members 20. Each plate member 20 has a generally circular part 22. A rectangular part 24 is attached to or made integral with the circular part 22 and has a width corresponding to the inner wid...

TECHNICAL AREA

[0001] The present invention relates to a tiller for in particular sailboats.BACKGROUND OF INVENTION

[0002] Boats with rudders, such as sail boats, are either provided with steering wheels or tillers connected to the rudders for steering the boat. On larger sailboats provided with steering wheels, these are either relatively small and therefore hard to reach if the helmsman wants to be positioned on side of the boat. Alternatively, the steering wheels are very large in diameter or two steering wheels are provided on each side of the boat so that the helmsman is able to steer the boat when positioned on the side of the boat. The drawback with large steering wheels is that they tend to block movement in the cockpit because the steering wheel by necessity is positioned transversal to the length of the boat. Two steering wheels requires a relatively complex and expensive arrangement.

[0003] For sailboats with tillers, a tiller extension is often used so that the helmsman can leave the tiller and move to the side of the boat for steering. The tiller extensions work generally well in good weather and wave conditions. However, in rough weather with high winds and high waves, the forces on the rudder are strong and they change direction, especially in high waves, and the tiller extensions, with its free joint, gives less control for handling these forces in a safe way, especially on larger boats. The reason for the free joint is to allow for various helmsman positions.

[0004] One cause for the design of the tiller extensions is that the tiller extensions are designed to be light and slender to be easy to handle when the helmsman moves from one side of the boat to the other. The drawbacks of the tiller extensions force the helmsman to move down into the cockpit in such weather and wave conditions, whereby the helmsman is in a much worse position regarding viewing of the sails as well as the surroundings such as other boats and rocks in the water.

[0005] There is thus room for improvements in this technical field.BRIEF DESCRIPTION OF INVENTION

[0006] The aim of the present application is to provide an improved tiller. The aim is obtained with a tiller having the features according to the independent patent claims. Preferable embodiments of the tiller form the subject of the dependent patent claims. According to one aspect of the invention, it comprises a tiller for a boat and in particular a sailboat, which tiller may comprise a base section arranged to be attached to a rudder or a rudder stock of a boat, a tiller extension provided with a free end that a person will grip when steering the boat, and an articulated section provided between the base section and the tiller extension that may have a generally vertical turning axis, in order to angle the tiller extension in relation to the base section, and a releasable locking mechanism for releasably locking the tiller extension in different angles in relation to the base section.

[0007] With this solution, the tiller may be adjusted such that a helmsman can be placed closer to the side of the boat, providing good views of both the surrounding sea and also the sails, while still having the sturdiness and firm contact with the rudder as a conventional straight tiller, and without the drawbacks of the conventional tiller extensions.

[0008] According to a further aspect, two elements may be provided with the turning axis that may be attached to one of the base section and the tiller extension, and one part may be provided with the turning axis and may be positioned between the two elements and attached to the other of the base section and the tiller extension. The articulated section is then provided with a sturdy joint that is capable of handling forces on the tiller with a good force distribution.

[0009] Further, the releasable locking mechanism may comprise a number of form-locking elements provided on the two elements, and may comprise a movable locking element provided on the one part and arranged to releasably engage with the form-locking elements. This provides a secure locking of the articulated section and a good force distribution between the parts. Regarding the locking function, the movable locking element may be provided with spring means for urging the locking element in engagement with the form-locking elements. This enables a locking engagement as long as the locking element is not operated.

[0010] According to a further aspect, the form-locking elements may comprise inwardly directed cogs along an inner circumference and wherein the locking element may comprise a cog wheel with outwardly directed cogs, which locking element is movable between a locked position wherein both form-locking elements are in engagement with the locking element and a released position wherein one of the form-locking elements are out of engagement with the locking element.

[0011] According to yet an aspect, the form-locking elements may comprise conical protrusions and / or conical recesses, and wherein the locking element may comprise conical protrusions and / or conical recesses, which locking element is movable between a locked position wherein the form-locking elements are in engagement with the locking element and a released position wherein the form-locking elements are out of engagement with the locking element. In this regard, the locking element is movable in the direction of the turning axis.

[0012] A release mechanism may further be provided and operably connected to the locking mechanism and provided with a manoeuvring element. Thus, the manoeuvring element will allow release of the locking element and thereby an adjustment of the articulated section. Preferably, the manoeuvring element may be positioned at the free end of the tiller extension for easy access for the helmsman.

[0013] As a further feature, the tiller extension may comprise two sections slidable in relation to each other for adjusting the length of the tiller extension. This enables the tiller to be adjusted in several ways depending on where in the boat the helmsman is positioned as well as any change in position of the helmsman. Preferably, the tiller extension further may comprise a locking mechanism for releasably locking the two sections to each other.

[0014] In order to further provide a good handling of the tiller when steering, it may further comprise a handle attached to the free end of the tiller extension. In this regard, the attachment of the handle may provide a releasable locking of the handle in different angular positions in relation to the tiller extension.

[0015] These and other aspects of, and advantages with, the present invention will become apparent from the following detailed description of the invention and from the accompanying drawings.BRIEF DESCRIPTION OF DRAWINGS

[0016] In the following detailed description of the invention, reference will be made to the accompanying drawings, of which

[0017] FIG. 1 shows a perspective view of an embodiment of a tiller according to the invention,

[0018] FIG. 2 shows a perspective view of a variant of the tiller of FIG. 1,

[0019] FIG. 3 shows the tiller of FIG. 2 with items removed,

[0020] FIGS. 4-6 show detailed views of an articulated section comprised in the tiller according to the invention,

[0021] FIG. 7 shows a cross-sectional view of a release mechanism of the articulated section according to an embodiment of the invention,

[0022] FIGS. 8-10 show detailed views of another embodiment of a release mechanism,

[0023] FIG. 11 shows a detailed view of a further embodiment of a release mechanism, and

[0024] FIGS. 12-20 show a further embodiment of a tiller according to the invention provided with a telescopic function,

[0025] FIG. 21 shows a tiller according to FIG. 1 provided with an extension for connection of an autopilot,

[0026] FIG. 22 shows a tiller with a further embodiment of a joint,

[0027] FIGS. 23-24 are exploded views of the joint comprised in the tiller of FIG. 22,

[0028] FIG. 25 shows a perspective view of a manoeuvring pin comprised in the joint according to FIGS. 23 and 24,

[0029] FIGS. 26-27 show cross-sectional views of the joint of FIGS. 23 and 24 in an initial, locked, position,

[0030] FIGS. 28-29 show cross-sectional views of the joint in a release position, and

[0031] FIGS. 30-33 show exploded views of a further embodiment of a joint comprised in the tiller of FIG. 1 or FIG. 22.DETAILED DESCRIPTION OF THE INVENTION

[0032] One example of a tiller 10 according to the invention is shown in FIG. 1. It comprises a base section 12 provided with attachment elements for attachment to an upper part of a rudder or a rudder stock. The base section 12 is tubular and elongated with a cross-section that may be circular, oval, or rectangular. The base section 12 may preferably be attached to the rudder or the rudder stock with an articulate joint 14, providing the possibility of folding the tiller 10 from a generally horizontal position to a generally vertical position.

[0033] The tiller 10 is further provided with an articulated section 16 providing an articulated joint. As seen in FIGS. 4-6, the articulated section 16 comprises a first element 18 attached to the base section 12. The first element 18 comprises two plate members 20. Each plate member 20 has a generally circular part 22. A rectangular part 24 is attached to or made integral with the circular part 22 and has a width corresponding to the inner width of the tubular base section 12. A tubular spacer 26 is provided between the rectangular parts 24 of the first element 18 creating a distance between the plate members 20. The spacer 26 has a length such that the distance d between outer surfaces of the rectangular parts 24 corresponds to the inner height of the tubular base section 12. A screw is provided through the spacer 26 for holding the two plate members 20 together. A number of threaded bores 28 may be arranged in the rectangular parts 24, to be used with screws through passages in the base section 12.

[0034] Each circular part 22 has a central passage 30, forming the turning axis A of the articulated section 16. In an area of the circular part 22 opposite the rectangular parts 24, a cut-out 32 is provided in each of the circular parts 22. The cut-out 32 has a shape of a sector with a side surface towards the periphery of the circular part provided with ridges 34 and recesses 36 with a shape generally corresponding to a cog wheel and forming form-locking elements. Two tubular spacers 38 are further arranged between the circular parts 22, having the same length as the spacer 26 between the rectangular parts 24. Two screws are provided through the spacers 38 for attaching the plate members 20 to each other.

[0035] The articulated section 16 further comprises a second element 40. The second element 40 is provided with a generally circular body 42. The circular body 42 has a thickness somewhat smaller than the distance between the plate members 20 of the first element 18 to fit between the plate members 20. The circular body 42 has a central pin 44 that fits into the passages 30 of the plate members 20 of the first element 18. The pin 44 preferably is provided with a bearing on each side of the body 42, such as a ball bearing or a plain bearing. This enables the second element 40 to be turned in relation to the first element 18 around the axis A. The circular body 42 is further provided with arc-shaped cut-outs 46 for accommodating the spacers 38 between the circular parts 22 of the first element 18.

[0036] The circular body 42 further has an elongated slit 48 that extends radially from the axis, the slit 48, forming a form-locking element. In the slit 48 a locking element 50 is arranged. The locking element 50 has a shape of a wedge or tooth, with a profile that corresponds to the recesses 36 of the sector-shaped cut-outs 32. The locking element 50 is movable in the slit 48 from a position where it is in engagement with the recesses 36 and to a position where it is out of engagement. A spring 52 is further provided, FIG. 7, seated in a bore 53 in the circular body 42 and in contact with the locking element 50, which urges the locking element 50 into engagement.

[0037] Since both plate members 20 are provided with the sector-shaped cut-outs 32, which the locking element 50 engages, there is an even force distribution on the articulated section 16.

[0038] The circular body 42 is further provided with two generally rectangular extensions 54 adjacent the slit 48. The extensions 54 are dimensioned to fit into a tiller extension 56 having a generally hollow elongated body. The articulated section 16 is further provided with two cylindrical cups or covers 58, FIG. 6, where only one is showing, attached to either side of the first and second element for protecting the articulated joint and the locking mechanism. However, the covers 58 are provided with cut-away sections 60 for enabling the articulated movement between the first and the second element. Preferably, gaskets 61 are provided between the circular body 42 and circular parts 22 for reducing friction and providing a sealing function. The gaskets are in this regard provided with appropriate cut-outs 63 corresponding to the cut-outs 32 in the circular parts 22.

[0039] The free end of the tiller extension 56 may further be provided with a handle 62 for a helmsman, FIGS. 1-3. In the shown embodiment, the handle 62 is ring-shaped and with a circular cross-section. The free end of the tiller extension 56 may be provided with a fixing element 64 that may have a semi-circular recess corresponding to the diameter of the handle 62. A friction-locking plate 66 is attached between the handle 62 and the fixing element 64, enabling the handle to be set in different angular positions upwards and downwards in relation to the tiller extension 56. Suitable locking elements, such as screws may be arranged for attaching the friction-locking plate 66 and thereby lock the handle 62 in the different angle positions.

[0040] Further, a release mechanism may be provided. It may comprise a manoeuvring element 68, in the embodiment shown a push button, FIG. 2. The push button 68 is connected to a push rod 70 that runs inside the tiller extension 56. The push rod 70 extends through the two rectangular extensions 54 and the inner end of the push rod 70 is in contact with the locking element 50 as seen in FIG. 7, enabling movement of the locking element 50 in relation to the form-locking recesses 36 for disengaging the locking element 50 from the circular parts 22. This in turn enables the tiller extension 56 to be turned in relation to the base section 12 around the axis A.

[0041] Within the scope of the invention, the release mechanism may have different designs. For instance, instead of a push button, a turning handle may be used at the free end of the tiller extension for moving the push rod to act on the locking element. One example is shown in FIGS. 8-10. Here a turning knob 80 is placed at the free end of the tiller extension 56, connected to a rod 82 that extends into the articulated section. The inner end of the rod 82 is arranged with a protrusion 84 provided with a cam surface 86. When the knob 80 and thus the rod 82 are turned, the cam surface 86 will act on the locking element 50 to move it out of engagement with the recesses 36 of the circular parts 22. In order to prevent turning in the opposite direction, a stop protrusion 88 is positioned opposite the cam surface 86 and placed on the side of the locking element 50. As a further alternative, a tilting handle may be used. It may be lifted for releasing the locking element and returned to a folded position for engagement.

[0042] As another alternative, the locking mechanism may be placed at the articulated section. As seen in FIG. 11, one of the first and the second parts 22, 42 may be arranged with a number of passages 90 arranged along a circle sector and one passage 92 in the other of the parts, and where a locking pin 94 may be pushed through the passages 90, 92 for locking the two parts in different angles. As a further alternative, a locking bolt may extend through the two parts. The locking bolt may be provided with a turning handle, such that the two parts are forced together and locked by friction. In this regard, surfaces of the first and second parts that are facing each other may be provided with friction enhancing material or patterns.

[0043] The tiller extension 56 may further be arranged in two sections 56′, 56″, FIGS. 12 and 13, hereafter named inner and outer sections, where the outer section 56″ has dimensions that fit into the inner section 56″ for providing a telescopic function. A locking mechanism is arranged between the two sections for locking the sections to each other in a length of the tiller extension chosen. In this aspect, the push rod is also designed telescopic so as to ensure the release function of the articulated section.

[0044] According to one example shown in FIGS. 14-19, a locking mechanism 100 comprises an end section 102 inserted into and attached to the inner end of the outer section 56″ of the tiller extension, FIG. 14. The outer section 56″ is provided with two generally circular passages 104 into which two locking balls 106 fit so as to protrude from the surface of the outer section 56″ but not as large as to fall out. Inside the outer section the balls 106 are placed in recesses 108 of a movable activator 110 operably connected to the release mechanism. The recesses 108 have an inner surface 112 that is inclined in relation to the longitudinal axis L of the section, as seen in FIG. 17. Further, the inner section 56′ is provided with a plurality of pairs of generally circular passages or recesses 11, FIG. 19, into which the balls fit, as will be described.

[0045] Further, springs 114 are arranged between the end section 102 and the activator 110 for urging the two parts from each other. The end section 102 is further provided with a circular passage 116. In the passage 116, a first elongated tubular element 118 is inserted. As seen in FIG. 14, the first element 118 has a generally circular cross-section with a diameter somewhat smaller than the diameter of the passage 116, providing a journaling of the first element 118 in the passage 116. However, the first element is further provided with two planar oppositely positioned surfaces. Further, the first element 118 is provided with an annular ledge 120 attached to the outer surface of the first element 118 and having rearwardly directed surfaces that are in contact with a forward directed surface of the activator 110 around the area of the passage, as seen in FIG. 18.

[0046] Inside the first element 118, a second elongated tubular element 122 is arranged, FIG. 16. The second element 122 has the same cross-sectional design as the first element but with measures to fit inside the first element 118, providing a telescopic function, and wherein the planar surfaces provide a rotational lock between the two elements. To the rear end of the second element 122, the locking element 50 is attached via a rod end 124, FIG. 10, fitting into the lower end of the second element. The unlocking of the articulated joint follows much the same manner as described above. Thus, by turning the knob 80, the first element 118 is turned, and due to the planar surfaces and the telescopic fit between the first and the second element, the second element 122 turns as well. This causes a release of the locking element 50 by the inclined surface 86 acting on the locking element 50, moving it out of engagement with the recesses 36.

[0047] Regarding the telescopic function, the two sections 56′, 56″ of the tiller extension are normally locked to each other in that the balls 106 are pressed against the inner surface of the inner section 56′ because of the springs 114 urging the activator 110 towards the free end of the tiller extension, which causes the inclined surfaces 112 of the recesses 108 to press on the balls 106, as seen in FIG. 17, as they are seated in the passages 113 of the inner section 56′, locking the both sections to each other in the lengthwise direction. When the length of the tiller extension is to be altered, the knob 80 is pressed and moved in the direction of the base section 12. This causes the first element 118 to move, and the second element 122 to slide inside the first element 118. Due to the annular ledge 120 on the outer surface of the first element 118, the movement of the first element 118 will cause the activator 110 to move towards the end section 102, against the force of the springs 114.

[0048] The movement of the activator 110 will move the recesses 108 in relation to the balls 106 and passages 104, so that the balls 106 are not pressed anymore by the inclined surfaces 112 but are free to move into the recesses 108, FIG. 19, and out of engagement with the passages 113 of the inner section, whereby the telescopic sections 56′, 56″ of the tiller extension are free to be moved relative each other, enabling a lengthening or shortening of the tiller extension. When the desired length has been almost adjusted, the knob 80 is released whereby the forces from the springs 114 will move the activator 110 back to its original position where the inclined surfaces 112 of the recesses 108 again press on the balls 106, and further movement of the outer section in relation to the inner section will cause the balls 106 to enter the passages of adjacent pairs of passages 113, thereby locking the telescopic sections.

[0049] The base section 12 may further be provided with an elongated extension 130, FIG. 21, preferably extending in the same direction as the base section 12 and preferably placed under the base section 12. The end of the extension 130 may be provided with attachment elements 132 for attaching an auto-pilot. This is an advantage in relation to attaching an auto-pilot directly to the tiller because now the tiller may be angled vertically so that it is out of the way in the cockpit.

[0050] The FIGS. 22-29 show a further embodiment of a tiller joint 200 comprised in the invention. It comprises a first element 202, FIGS. 23-24. The first element 202 is provided with an attachment 203 that fits into, and is attached to, a base section 12. The first element 202 has a cylindrical shape with a circumferential side wall 204. On the inside of the wall a circular toothed rack 206 is arranged with teeth facing towards the centre of the first element 202. An axle 208 is arranged protruding through the centre of the first element 202 and upwards. The axle 208 is preferably arranged with a cylindrical sliding bearing 210.

[0051] A second element 212 is further provided, attached to, or made integral with, a tiller extension 56. The second 212 element has also a cylindrical shape with a circumferential side wall 214. The upper end of the axle 208 extends into a seat in the centre of the second element 212. On the inside of the side wall 214 a circular toothed rack 216 is arranged with teeth facing inwards. The first element 202 is provided with an annular, upwards facing, protrusion 218 that is arranged to fit into an annular, downwards facing, groove 220 of the second element 212, thus providing a protection of the interior of the joint.

[0052] Further, a cog wheel 222 is placed inside the first and the second element, having a diameter so that its teeth 224 are meshing with the teeth of the toothed racks 206, 216 of the first and the second elements. The cog wheel 222 is provided with a passage 226 in its centre, having a diameter generally corresponding to the sliding bearing 210. The cog wheel 222 is provided with an upwards facing central hub 228 on an upper surface that fits into a circular recess 230 on a downward directed surface of the first element 202. The upper surface of the cog wheel 222 is further provided with a pin 232 at a radius from the centre. The pin 232 is arranged to fit into an arc-shaped groove 234 provided on the downward directed surface of the first element 202. The height of the cog wheel 222 is such that it can be moved vertically in relation to the first and the second elements. Further, the first element 202 is provided with three seats in which springs 238 are inserted. The springs 238 act on the underside of the cog wheel 222 to urge it upwards.

[0053] A circular cap 240 is arranged on the second element 212, provided with an annular side wall 242 that fits in an annular recess 244 on the second element 212. The cap 240 is further arranged with a number of downwardly directed pins 246 that protrude through passages 248 in the second element 212. The lower ends of the pins 246 are provided with enlargements 250 that are in contact with an upper surface of the cog wheel 222.

[0054] The second element 212 is further arranged with an attachment 252 having a shape so as to fit into a tiller extension tube. The attachment 252 is provided with a cylindrical passage 254. In the passage 254, a manoeuvring pin 256 is rotatably arranged. The manoeuvring pin 256 is provided with an annular protrusion 258 that fits in an annular recess 260 in the attachment 252, thereby providing a lock in the longitudinal direction of the manoeuvring pin 256. The outer end of the manoeuvring pin 256 is connected to a manoeuvring rod 262 that extends through the tiller extension. An outer end of the manoeuvring rod 262 is provided with a handle 264, FIG. 22, to enable turning of the manoeuvring rod 262. The inner end of the manoeuvring pin 256 is provided with a cut-out 266, FIG. 26, which cut-out 266 has a planar surface 268 that is in contact with the upper surface of the cog wheel 222.

[0055] The tiller joint 200 is intended to function as follows. When the joint 200 is in its initial, un-affected, state, FIGS. 26-27, the cog wheel 222 is urged upwards by the springs 238 so that it is in contact with the second element 212. In this position, the teeth 224 of the cog wheel 222 are in engagement with the toothed racks of both the first and the second elements, thereby locking the joint. The joint 200 can be activated and released for turning the second element in relation to the first element in two ways.

[0056] One way of activating the joint 200 is to turn the handle 264 of the manoeuvring rod 262, which in turn turns the manoeuvring pin 256, arrow I in FIG. 29. This will cause the edges of the cut-out 266 of the manoeuvring pin 256 to act on the cog wheel 222 and to move it downwards, against the force of the springs 238, FIGS. 28-29. The downward movement will cause the teeth 224 of the cog wheel 222 to move out of engagement with the toothed rack 216 of the second element 212, thereby enabling a turning of the tiller extension 56 and the second element 212 in relation to the base section 12 and the first element 202. Thus, the angle between the base section 12 and the tiller extension 56 can be adjusted. The angle is limited by the arc-shaped groove 234 of the second element 212 and the pin 232 of the cog wheel 222. When the desired angle is adjusted, the handle 264 of the manoeuvring rod 262 is released, whereby the manoeuvring pin 256 is turned back to its initial position and the cog wheel 222 is pushed back to its initial position by the springs 238, whereby the teeth 224 of the cog wheel 222 again are engaging the toothed rack 216 of the second element 212, locking the joint 200.

[0057] The second way of activating the joint 200 is by pushing the cap 240 downwards, arrow II in FIG. 29. The pins 246 of the cap 240 will then push the cog wheel 222 downwards whereby its teeth 224 move out of engagement with the toothed rack 216 of the second element 212. The joint 200 is now free to be adjusted as described above. When the desired angle is adjusted, the cap 240 is released, whereby the springs 238 move the cog wheel 222 into engagement with the second element 212.

[0058] FIGS. 30 to 33 show a further alternative of the locking function of a tiller joint 300. The basic design corresponds to the previous joint, with a first element 302 provided with an attachment 304 that is attached to the base section 12 and a second element 306 attached to the tiller extension 56. The first element 302 is provided with a circular recess 308 on its underside. A plurality of conically shaped protrusions 310 are placed in a circle in the recess 308, FIG. 32. At the centre of the recess 308, a passage 312 is provided. The passage 312 is semi-circular with to oppositely arranged sections that are straight. In the recess 308, a generally disc-shaped first connection element 314 is arranged. The first connection element 314 is provided with a plurality of conically shaped recesses 316 placed in a circle on its upper surface, FIG. 31. The number and the distance between the recesses 316 correspond to the number and the distance between the protrusions 310 of the first element 302, wherein the protrusions 310 engage with the recesses 316 when the first connection element 314 is in engagement with the first element 302, as will be described below. The first connection element 314 is further provided with a central post 318, FIG. 33, on its upper surface, which post 318 has a shape corresponding to the shape of the passage 312 of the first element 302, and thus fits in the passage 312, creating a form-lock. An upper surface of the post 318 is further provided with a central groove 320 having a flat bottom and parallel side walls. The first connection element 314 is further provided with a central passage 322 through which a turning shaft 324 extends. The turning shaft 324 is seated with one end in a lower lid 326 that is attached to a lower surface of the first element 302. A compression spring 327 is further provided between the lower lid 326 and the first connection element 314, surrounding the turning shaft 324.

[0059] The first element 302 is further provided with a circular recess 328 on its upper surface. In this recess 328 a disc-shaped second connection element 330 is fitted. The second connection element 330 has a central generally rectangular post 332 on its lower surface, FIG. 32. The rectangular 332 post has a shape and dimensions so that it fits in the groove 320 of the first connection element 314. The two connection elements 314, 330 are further attached to each other by appropriate means such as screws, the attached elements shown in FIG. 33. The upper surface of the second connection element 330 is provided with a central generally circular post 334. The second connection element 330 is further provided with a plurality of conically shaped protrusions 336 placed in a circle.

[0060] On a lower surface of the second element 306, a plurality of conical recesses 338 are arranged in a circle. The number and distance between the recesses 338 correspond to the number and distance of the protrusions 336 of the second connection element 330, wherein the protrusions 336 engage with the recesses 338 when the second connection element 330 is in engagement with the second element 306, as will be described below. The upper surface of the second connection element 330 is further provided with a pin 340 at a radius from the centre. The pin 340 is arranged to fit into an arc-shaped groove 342 provided on the downward directed surface of the second element 306. The second element 306 is provided with a central circular recess 344 in which the post 334 of the second connection element 330 fits. The recess 344 is provided with a passage 346 through which the turning shaft 324 extends. The free end of the turning shaft 324 is provided with threads for a securing nut 348, FIG. 31.

[0061] A circular cap 350 is arranged on the second element 306, provided with an annular side wall 352 that fits in an annular recess 354 on the second element 306. As with the previous embodiment, the cap 350 is further arranged with a number of downwardly directed pins 246 or screws that protrude through passages in the second element 306. The lower ends of the pins 246 are provided with enlargements or heads 250 that are in contact with an upper surface of the second connection element 330. Further, a compression spring 358 is provided between the cap 350 and the second element 306, surrounding the turning shaft 324, urging the cap 350 upwards.

[0062] As with the previous embodiment, the second element 306 is arranged with the attachment 252 having a shape so as to fit into a tiller extension tube. The attachment 252 is provided with a cylindrical passage 254. In the passage 254, the manoeuvring pin 256 is rotatably arranged, which is connected to the manoeuvring rod 262 that extends through the tiller extension 56. The inner end of the manoeuvring pin 256 is provided with a cut-out 266, which cut-out 266 has a planar surface 268 that is in contact with the upper surface of the second connection element 330.

[0063] The function of this embodiment is intended as follows. When the joint 300 is assembled and in an initial state, the compression spring 327 between the lower lid 326 and the first connection element 314 urges the first connection element 314 in engagement with the first element 302 and the second connection element 330 in engagement with the second element 306. Thus, due to the engagement the position of the joint is locked from turning. Further, due to the conical shape of the protrusions and the recesses of the connections, a very firm lock of the joint is obtained without any play between the parts.

[0064] As with the previous embodiment, the joint 300 may be operated in two ways. The first is to turn the handle 264 of the manoeuvring rod 262, which in turn turns the manoeuvring pin 256. This will cause the edges of the cut-out 266 of the manoeuvring pin 256 to act on the second connection element 330 and to move it downwards, against the force of the compression spring 327. Since the second connection element 330 is attached to the first connection element 314, the latter will also move downwards. The downward movement will cause the protrusions 336 of the second connection element 330 to move out of engagement with the recesses 338 of the second element 330 as well as the recesses 316 of the first connection element 314 to move out of engagement with the protrusions 310 of the first element 302, thereby enabling a turning of the tiller extension 56 and the second element 306 in relation to the base section 12 and the first element 302. Thus, the angle between the base section 12 and the tiller extension 56 can be adjusted. The angle is limited by the arc-shaped groove 342 of the second element 306 and the pin 340 of the second connection element 330. When the desired angle is adjusted, the handle 264 of the manoeuvring rod262 is released, whereby the manoeuvring pin 256 is turned back to its initial position and first and second connection elements are pushed back to their initial position by the compression spring 327, whereby the protrusions 336 of the second connection element 330 again are engaging the recesses 338 of the second element 330 as well as the recesses 316 of the first connection element 314 engaging the protrusions 310 of the first element 302, locking the joint 300.

[0065] The second way of activating the joint 300 is by pushing the cap 350 downwards. The pins 352 of the cap 350 will then push the second connection element 330 downwards whereby its protrusions 336 move out of engagement with the recesses 338 of the second element 330 as well as the recesses 316 of the first connection element 314 moving out of engagement with the protrusions 310 of the first element 302. The joint 300 is now free to be adjusted as described above. When the desired angle is adjusted, the cap 350 is released, whereby the compression spring 327 move the second connection element 330 into engagement with the second element 306 and the first connection element 314 into engagement with the first element 302.

[0066] Even though some of the elements in the embodiment described above comprise conical protrusions and other interacting elements comprise conical recesses, it is to be understood that the protrusions and the recesses may switch place on the elements, providing the same function.

[0067] It is to be understood that the embodiments described above and shown in the drawings are to be regarded only as non-limiting examples of the invention and that it may be modified in many ways within the scope of the patent claims.

Examples

Embodiment Construction

[0032]One example of a tiller 10 according to the invention is shown in FIG. 1. It comprises a base section 12 provided with attachment elements for attachment to an upper part of a rudder or a rudder stock. The base section 12 is tubular and elongated with a cross-section that may be circular, oval, or rectangular. The base section 12 may preferably be attached to the rudder or the rudder stock with an articulate joint 14, providing the possibility of folding the tiller 10 from a generally horizontal position to a generally vertical position.

[0033]The tiller 10 is further provided with an articulated section 16 providing an articulated joint. As seen in FIGS. 4-6, the articulated section 16 comprises a first element 18 attached to the base section 12. The first element 18 comprises two plate members 20. Each plate member 20 has a generally circular part 22. A rectangular part 24 is attached to or made integral with the circular part 22 and has a width corresponding to the inner wid...

Claims

1. Tiller (10) for a boat and in particular a sailboat, which tiller comprisesa base section (12) arranged to be attached to a rudder or a rudder stock of a boat,a tiller extension (56) provided with a free end that a person will grip when steering the boat,an articulated section (16) provided between the base section (12) and the tiller extension (56) and having a generally vertical turning axis (30, 44; 208; 324), in order to angle the tiller extension in relation to the base section, anda releasable locking mechanism (36, 50; 90, 92, 94; 206, 216, 224; 336, 338) for releasably locking the tiller extension in different angles in relation to the base section.

2. Tiller according to claim 1, comprising at least two elements, wherein one element (18, 40; 202, 212; 302, 306) provided with the turning axis (30, 44; 208;324) is attached to the base section, and one element (18, 40; 202, 212; 302, 306) provided with the turning axis (30, 44; 208; 324) is attached to the tiller extension, wherein the releasable locking mechanism comprises a number of form-locking elements (34, 36; 206, 216; 310, 338) provided on the two elements, and comprises a movable locking element (50; 224; 330, 336) arranged to releasably engage with the form-locking elements (34, 36).

3. Tiller according to claim 1, wherein one element provided with the turning axis (30) comprises two parts (20) attached to one of the base section and the tiller extension, and one element provided with the turning axis comprises one part (40) positioned between the two parts and attached to the other of the base section and the tiller extension.

4. Tiller according to claim 2, wherein the form-locking elements comprise inwardly directed cogs (206, 216) along an inner circumference and wherein the locking element comprises a cog wheel (222) with outwardly directed cogs (224), which locking element is movable between a locked position wherein both form-locking elements are in engagement with the locking element and a released position wherein one of the form-locking elements are out of engagement with the locking element.

5. Tiller according to claim 2, wherein the form-locking elements comprise conical protrusions (310) and / or conical recesses (338), and wherein the locking element (314, 330) comprise conical protrusions (336) and / or conical recesses (316), which locking element is movable between a locked position wherein the form-locking elements are in engagement with the locking element and a released position wherein the form-locking elements are out of engagement with the locking element.

6. Tiller according to claim 5, wherein the locking element (222; 330) is movable in the direction of the turning axis.

7. Tiller according to claim 2, wherein the movable locking element is provided with spring means (52; 238; 327) for urging the locking element (50; 222; 330) in engagement with the form-locking elements (34, 36).

8. Tiller according to claim 1, further comprising a release mechanism (68; 82; 94) operably connected to the locking mechanism (36, 50; 90, 92) and provided with a manoeuvring element (70; 80; 94).

9. Tiller according to claim 8, wherein the manoeuvring element (70; 80) is positioned at the free end of the tiller extension.

10. Tiller according to claim 8, wherein the release mechanism is arranged to act on the locking element.

11. Tiller according to claim 1, wherein the tiller extension comprises two sections (56′, 56″) slidable in relation to each other for adjusting the length of the tiller extension.

12. Tiller according to claim 11, wherein the tiller extension further comprises a locking mechanism for releasably locking the two sections to each other.

13. Tiller according to claim 1, further comprising a handle (62) attached to the free end of the tiller extension.

14. Tiller according to claim 13, wherein the attachment (64, 66) of the handle provides a releasable locking of the handle in different angular positions in relation to the tiller extension.

15. Tiller according to claims 13, wherein the handle is ring-shaped.

Images