US20070137550A1 - Marine Drive with Integrated Trim Tab - Google Patents

Marine Drive with Integrated Trim Tab Download PDF

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Publication number
US20070137550A1
US20070137550A1 US11/677,720 US67772007A US2007137550A1 US 20070137550 A1 US20070137550 A1 US 20070137550A1 US 67772007 A US67772007 A US 67772007A US 2007137550 A1 US2007137550 A1 US 2007137550A1
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United States
Prior art keywords
vessel
drive
marine
hull
trim tab
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/677,720
Inventor
Richard Davis
David Gruenwald
John Groeschel
Todd Gruenstern
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Brunswick Corp
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Brunswick Corp
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Filing date
Publication date
Application filed by Brunswick Corp filed Critical Brunswick Corp
Priority to US11/677,720 priority Critical patent/US20070137550A1/en
Publication of US20070137550A1 publication Critical patent/US20070137550A1/en
Assigned to JPMORGAN CHASE BANK, N.A. reassignment JPMORGAN CHASE BANK, N.A. SECURITY AGREEMENT Assignors: ATTWOOD CORPORATION, BOSTON WHALER, INC., BRUNSWICK BOWLING & BILLIARDS CORPORATION, BRUNSWICK COMMERCIAL & GOVERNMENT PRODUCTS, INC., BRUNSWICK CORPORATION, BRUNSWICK FAMILY BOAT CO. INC., BRUNSWICK LEISURE BOAT COMPANY, LLC, LAND 'N' SEA DISTRIBUTING, INC., LUND BOAT COMPANY, TRITON BOAT COMPANY, L.P.
Assigned to BRUNSWICK CORPORATION, BRUNSWICK LEISURE BOAT COMPANY, LLC, TRITON BOAT COMPANY, L.P., LUND BOAT COMPANY, BRUNSWICK BOWLING & BILLIARDS CORPORATION, BOSTON WHALER, INC., BRUNSWICK FAMILY BOAT CO. INC., BRUNSWICK COMMERICAL & GOVERNMENT PRODUCTS, INC., ATTWOOD CORPORATION, LAND 'N' SEA DISTRIBUTING, INC. reassignment BRUNSWICK CORPORATION RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • B63B39/061—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water by using trimflaps, i.e. flaps mounted on the rear of a boat, e.g. speed boat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
    • B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/16—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
    • B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis
    • B63H2005/1256—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis with mechanical power transmission to propellers

Definitions

  • the invention relates to marine drives and to marine vessel and drive combinations.
  • Marine drives as well as marine vessel and drive combinations are known in the prior art.
  • Marine vessels may include a trim tab for contact by the water for adjusting vessel attitude and/or altering thrust vectors, or otherwise affecting hydrodynamic operation of the vessel.
  • the present invention arose during continuing development efforts directed toward marine drives and toward marine vessel and drive combinations.
  • FIG. 1 is a perspective view of a marine vessel and drive combination in accordance with the invention.
  • FIG. 2 is a bottom elevation view of the combination of FIG. 1 .
  • FIG. 3 is a side elevation view of the combination of FIG. 1 .
  • FIG. 4 is a rear or aft elevation view of the combination of FIG. 1 .
  • FIG. 5 is an enlarged view of a portion of FIG. 3 .
  • FIG. 5A is like a portion of FIG. 5 and shows an alternate embodiment.
  • FIG. 5B is an enlarged rear elevation view of a portion of FIG. 5 .
  • FIG. 6 is an enlarged view of a portion of FIG. 2 .
  • FIG. 7 is like FIG. 6 and shows a different steering orientation.
  • FIG. 8 is like FIG. 6 and shows another different steering orientation.
  • FIG. 9 is an enlarged view of a portion of FIG. 1 .
  • FIG. 10 is like FIG. 9 and shows a further operational embodiment.
  • FIG. 11 is a side view showing the arrangement of an engine and marine propulsion device used in conjunction with the present invention.
  • FIGS. 1-4 show a marine vessel and drive combination.
  • Marine vessel 22 includes a hull 24 having a longitudinally extending keel 26 having a lower reach 28 .
  • the hull has port and starboard lower hull surfaces 30 and 32 , respectively, extending upwardly and laterally distally oppositely from keel 26 in V-shaped relation, FIG. 4 .
  • Hull 24 extends forwardly from a stern 34 to a bow 36 .
  • a port tunnel 38 is formed in port lower hull surface 30 .
  • Port tunnel 38 has a top 40 , FIG. 4 , spaced above an open bottom 42 at port lower hull surface 30 .
  • Port tunnel 38 opens aft at stem 34 and extends forwardly therefrom and has a closed forward end 44 aft of bow 36 .
  • a starboard tunnel 46 is formed in starboard lower hull surface 32 .
  • Starboard tunnel 46 has a top 48 spaced above an open bottom 50 at starboard lower hull surface 32 .
  • Starboard tunnel 46 opens aft at stern 34 and extends forwardly therefrom and has a closed forward end 52 aft of bow 36 .
  • a port marine propulsion device 54 includes a port driveshaft housing 56 extending downwardly in port tunnel 38 to a port lower gear case 58 , e.g. including a torpedo-shaped housing as is known, supporting at least one port propeller shaft 60 driving at least one water-engaging propulsor such as port propeller 62 , and preferably a pair of propeller shafts driving counter-rotating propellers 62 , 63 , as is known, for example U.S. Pat. Nos. 5,108,325, 5,230,644, 5,366,398, 5,415,576, 5,425,663, all incorporated herein by reference.
  • Starboard marine propulsion device 64 is comparable and includes a starboard driveshaft housing 66 extending downwardly in starboard tunnel 46 to starboard lower gear case 68 , e.g. provided by the noted torpedo-shaped housing, supporting at least one starboard propeller shaft 70 driving at least one starboard propeller 72 , and preferably a pair of counter-rotating starboard propellers 72 , 73 , as above.
  • the port and starboard marine propulsion devices 54 and 64 are steerable about respective port and starboard vertical steering axes 74 and 76 , comparably as shown in commonly owned co-pending U.S. patent application Ser. No. 11/248,482, filed Oct. 12, 2005, and application Ser. No. 11/248,483, filed Oct. 12, 2005, incorporated herein by reference.
  • Port steering axis 74 extends through the top 40 of port tunnel 38 .
  • Starboard steering axis 76 extends through the top 48 of starboard tunnel 46 .
  • Tops 40 and 48 of port and starboard tunnels 38 and 46 are at a given vertical elevation, FIG. 4 , spaced vertically above lower reach 28 of keel 26 to provide port and starboard tunnels 38 and 46 with a given vertical height receiving port and starboard marine propulsion devices 54 and 64 and raising same relative to keel 26 , such that keel 26 at least partially protects port and starboard marine propulsion devices 54 and 64 from striking underwater objects, including grounding, during forward propulsion of the vessel.
  • At least a portion of port driveshaft housing 56 is in port tunnel 38 and above open bottom 42 of port tunnel 38 at port lower hull surface 30 .
  • At least a portion of port lower gear case 58 is outside of port tunnel 38 and below open bottom 42 of port tunnel 38 at port lower hull surface 30 .
  • At least a portion of starboard driveshaft housing 66 is in starboard tunnel 46 and above open bottom 50 of starboard tunnel 46 at starboard lower hull surface 32 .
  • At least a portion of starboard lower gear case 68 is outside of starboard tunnel 46 and below open bottom 50 of starboard tunnel 46 at starboard lower hull surface 32 .
  • port and starboard lower gear cases 58 and 68 are horizontally aligned along a horizontal projection line at or above and transversely crossing lower reach 28 of keel 26 .
  • Port lower gear case 58 includes the noted port torpedo-shaped housing having a front nose 78 with a curved surface 80 extending downwardly and aft therefrom.
  • front nose 78 is horizontally aligned with lower reach 28 of keel 26 , such that underwater objects struck by port lower gear case 58 slide along curved surface 80 downwardly and aft from nose 78 of the noted port torpedo-shaped housing.
  • Starboard lower gear case 68 includes the noted starboard torpedo-shaped housing having a front nose 82 , FIG. 5 , with a curved surface 84 extending downwardly and aft therefrom.
  • front nose 82 is horizontally aligned with lower reach 28 of keel 26 , such that underwater objects struck by starboard lower gear case 68 slide along curved surface 84 extending downwardly and aft from nose 82 of the noted starboard torpedo-shaped housing.
  • port and starboard marine propulsion devices 54 and 64 have respective port and starboard lower skegs 86 and 88 extending downwardly from respective port and starboard lower gear cases 58 and 68 to a lower reach at a vertical level below lower reach 28 of keel 26 .
  • Each of port and starboard lower skegs 86 and 88 is a breakaway skeg, e.g.
  • FIG. 5B is an enlarged rear elevation view of a portion of skeg 88 and gear case 68 of FIG. 5 , with propellers 72 and 73 removed, and showing the mounting of skeg 88 to lower gear case 68 by a breakaway channel or tongue and groove arrangement, for example tongue 89 at the top of skeg 88 , and groove or channel 91 at the bottom of lower gear case 68 receiving tongue 89 in breakaway manner upon shearing of frangible pins such as 90 .
  • a breakaway channel or tongue and groove arrangement for example tongue 89 at the top of skeg 88 , and groove or channel 91 at the bottom of lower gear case 68 receiving tongue 89 in breakaway manner upon shearing of frangible pins such as 90 .
  • Port marine propulsion device 54 provides propulsion thrust along a port thrust direction 102 , FIG. 6 , along the noted at least one port propeller shaft 60 .
  • Port marine propulsion device 54 has a port reference position 104 with port thrust direction 102 pointing forwardly parallel to keel 26 .
  • Port marine propulsion device 54 is steerable about port steering axis 74 along a first angular range 106 , FIG. 7 , from port reference position 104 away from keel 26 , e.g. clockwise in FIG. 7 .
  • Port marine propulsion device 54 is steerable about steering axis 72 along a second angular range 108 , FIG. 8 , from port reference position 104 towards keel 26 , e.g. counterclockwise in FIG.
  • Starboard propulsion device 64 provides propulsion thrust along a starboard thrust direction 110 along the noted at least one starboard propeller shaft 70 .
  • Starboard marine propulsion device 64 has a starboard reference position 112 , FIG. 6 , with starboard thrust direction 110 pointing forwardly parallel to keel 26 .
  • Starboard marine propulsion device 64 is steerable about starboard steering axis 76 along a third angular range 114 , FIG. 7 , from starboard reference position 112 towards keel 26 , e.g. clockwise in FIG. 7 .
  • Starboard marine propulsion device 64 is steerable about starboard steering axis 76 along a fourth angular range 116 , FIG. 8 , away from keel 26 , e.g. counterclockwise in FIG. 8 .
  • Third and fourth angular ranges 114 and 116 are unequal, and starboard tunnel 46 is asymmetric, to be described.
  • second angular range 108 is at least twice as great as first angular range 106 , and in a further preferred embodiment, first angular range 106 is at least 15 degrees, and second angular range 108 is at least 45 degrees.
  • third angular range 114 is at least twice as great as fourth angular range 116 , and in the noted further preferred embodiment, third angular range 114 is at least 45 degrees, and fourth angular range 116 is at least 15 degrees.
  • Marine propulsion devices 54 and 64 may be rotated and steered in unison with equal angular ranges, or may be independently controlled for various steering, docking, and position or station maintaining virtual anchoring functions, and for which further reference is made to the above-noted commonly owned co-pending '482 and '483 applications.
  • Port tunnel 38 has left and right port tunnel sidewalls 120 and 122 extending vertically between top 40 of port tunnel 38 and open bottom 42 of port tunnel 38 and port lower hull surface 30 .
  • Left and right port tunnel sidewalls 120 and 122 are laterally spaced by port driveshaft housing 56 therebetween.
  • Right port tunnel sidewall 122 has a greater vertical height and a lower vertical reach than left port tunnel sidewall 120 and limits the span of first angular range 106 to be less than the span of second angular range 108 .
  • Starboard tunnel 46 has left and right starboard tunnel sidewalls 124 and 126 extending vertically between top 48 of starboard tunnel 46 and open bottom 50 of starboard tunnel 46 at starboard lower hull surface 32 .
  • Left and right starboard tunnel sidewalls 124 and 126 are laterally spaced by starboard driveshaft housing 66 therebetween.
  • Left starboard tunnel sidewall 124 has a greater vertical height and a lower vertical reach than right starboard tunnel sidewall 126 and limits the span of fourth angular range 116 to be less than the span of third angular range 114 .
  • Port marine propulsion device 54 has a port trim tab 130 pivotally mounted thereto for contact by the water for adjusting vessel attitude and/or altering thrust vectors or otherwise affecting hydrodynamic operation of the vessel.
  • Starboard marine propulsion device 64 has a starboard trim tab 132 pivotally mounted thereto.
  • Port trim tab 130 is preferably pivotally mounted to port marine propulsion device 54 at a pivot axis 134 , FIG. 6 , aft of port driveshaft housing 56 and aft of port steering axis 74 .
  • starboard trim tab 132 is preferably pivotally mounted to starboard marine propulsion device 64 at a pivot axis 136 aft of starboard driveshaft housing 66 and aft of starboard steering axis 76 .
  • Port trim tab 130 has an upwardly pivoted retracted position, FIGS. 1, 4 , 9 , and solid line in FIG. 5 , and a downwardly pivoted extended position, FIG. 10 , and dashed line in FIG. 5 .
  • the top 40 , FIG. 4 , of port tunnel 38 has a notch 140 receiving port trim tab 130 in the noted retracted position to enhance hydrodynamic profile by providing a smoother transition providing less restriction to water flow therepast.
  • Starboard trim tab 132 likewise has an upwardly pivoted retracted position, and a downwardly pivoted extended position.
  • the top 48 of starboard tunnel 46 has a notch 142 receiving starboard trim tab 132 in the noted retracted position to enhance hydrodynamic profile.
  • Each trim tab may be actuated in conventional manner, e.g. hydraulically, e.g. by a hydraulic cylinder 144 having an extensible and retractable plunger or piston 146 engaging pivot pin 148 journaled to stanchions 150 of the respective trim tab.
  • external hydraulic cylinder 144 a has its piston 146 a connected to the aft end of the trim tab, for a longer moment arm from the pivot axis of the trim tab if desired.
  • the trim tabs may be actuated electrically, e.g. by electrical reduction motors.
  • the forward end of the trim tab is pivotally mounted at hinges such as 152 to mounting plate 154 of the marine propulsion device which is then mounted to the vessel hull and sealed thereto for example at sealing gasket 156 .
  • the forward end of the trim tab is pivotally mounted to the marine propulsion device and not to the vessel, and the aft end of the trim tab is movable in a vertical arc.
  • FIG. 11 is a side view taken from the above-noted commonly owned co-pending '482 and '483 applications and showing the arrangement of a marine propulsion device, such as 54 or 64 , associated with a mechanism that is able to rotate the marine propulsion device about its respective steering axis 74 or 76 .
  • the driveshaft of the marine propulsion device extends vertically and parallel to the steering axis and is connected in torque transmitting relation with a generally horizontal propeller shaft that is able to rotate about a propeller axis 61 .
  • the embodiment shown in FIG. 11 comprises two propellers 62 and 63 , as above noted, that are attached to the propeller shaft 60 .
  • the motive force to drive the propellers 62 and 63 is provided by an internal combustion engine 160 that is located within the bilge of the marine vessel 22 .
  • the engine is configured with its crankshaft aligned for rotation about a horizontal axis.
  • engine 160 is a diesel engine.
  • Each of the two marine propulsion devices 54 and 64 is driven by a separate engine 160 .
  • each of the marine propulsion devices 54 and 64 are independently steerable about their respective steering axes 74 and 76 .
  • the steering axes are generally vertical and parallel to each other. They are intentionally not configured to be perpendicular to the bottom respective surface 30 and 32 of the hull.
  • Driveshaft housings 56 and 66 and gear case torpedo housings 58 and 68 contain rotatable shafts, gears, and bearings which support the shafts and connect the driveshaft to the propeller shaft for rotation of the propellers.
  • No source of motive power is located below the hull surface. The power necessary to rotate the propellers is solely provided by the internal combustion engine.
  • the marine vessel maneuvering system in one preferred embodiment is that provided in the noted commonly owned co-pending '482 and '483 applications, allowing the operator of the marine vessel to provide maneuvering commands to a microprocessor which controls the steering movements and thrust magnitudes of two marine propulsion devices 54 , 64 to implement those maneuvering commands, e.g. steering, docking, and position or station maintaining virtual anchoring functions, and the like, as above noted.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Toys (AREA)
  • Ship Loading And Unloading (AREA)
  • Automatic Cycles, And Cycles In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
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Abstract

A marine drive and a marine vessel and drive combination have a trim tab with a forward end pivotally mounted to a marine propulsion device.

Description

    BACKGROUND AND SUMMARY
  • The invention relates to marine drives and to marine vessel and drive combinations.
  • Marine drives as well as marine vessel and drive combinations are known in the prior art. Marine vessels may include a trim tab for contact by the water for adjusting vessel attitude and/or altering thrust vectors, or otherwise affecting hydrodynamic operation of the vessel.
  • The present invention arose during continuing development efforts directed toward marine drives and toward marine vessel and drive combinations.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a perspective view of a marine vessel and drive combination in accordance with the invention.
  • FIG. 2 is a bottom elevation view of the combination of FIG. 1.
  • FIG. 3 is a side elevation view of the combination of FIG. 1.
  • FIG. 4 is a rear or aft elevation view of the combination of FIG. 1.
  • FIG. 5 is an enlarged view of a portion of FIG. 3.
  • FIG. 5A is like a portion of FIG. 5 and shows an alternate embodiment.
  • FIG. 5B is an enlarged rear elevation view of a portion of FIG. 5.
  • FIG. 6 is an enlarged view of a portion of FIG. 2.
  • FIG. 7 is like FIG. 6 and shows a different steering orientation.
  • FIG. 8 is like FIG. 6 and shows another different steering orientation.
  • FIG. 9 is an enlarged view of a portion of FIG. 1.
  • FIG. 10 is like FIG. 9 and shows a further operational embodiment.
  • FIG. 11 is a side view showing the arrangement of an engine and marine propulsion device used in conjunction with the present invention.
    • DETAILED DESCRIPTION
  • FIGS. 1-4 show a marine vessel and drive combination. Marine vessel 22 includes a hull 24 having a longitudinally extending keel 26 having a lower reach 28. The hull has port and starboard lower hull surfaces 30 and 32, respectively, extending upwardly and laterally distally oppositely from keel 26 in V-shaped relation, FIG. 4. Hull 24 extends forwardly from a stern 34 to a bow 36.
  • A port tunnel 38, FIG. 2, is formed in port lower hull surface 30. Port tunnel 38 has a top 40, FIG. 4, spaced above an open bottom 42 at port lower hull surface 30. Port tunnel 38 opens aft at stem 34 and extends forwardly therefrom and has a closed forward end 44 aft of bow 36. A starboard tunnel 46 is formed in starboard lower hull surface 32. Starboard tunnel 46 has a top 48 spaced above an open bottom 50 at starboard lower hull surface 32. Starboard tunnel 46 opens aft at stern 34 and extends forwardly therefrom and has a closed forward end 52 aft of bow 36.
  • A port marine propulsion device 54 includes a port driveshaft housing 56 extending downwardly in port tunnel 38 to a port lower gear case 58, e.g. including a torpedo-shaped housing as is known, supporting at least one port propeller shaft 60 driving at least one water-engaging propulsor such as port propeller 62, and preferably a pair of propeller shafts driving counter-rotating propellers 62, 63, as is known, for example U.S. Pat. Nos. 5,108,325, 5,230,644, 5,366,398, 5,415,576, 5,425,663, all incorporated herein by reference. Starboard marine propulsion device 64 is comparable and includes a starboard driveshaft housing 66 extending downwardly in starboard tunnel 46 to starboard lower gear case 68, e.g. provided by the noted torpedo-shaped housing, supporting at least one starboard propeller shaft 70 driving at least one starboard propeller 72, and preferably a pair of counter-rotating starboard propellers 72, 73, as above. The port and starboard marine propulsion devices 54 and 64 are steerable about respective port and starboard vertical steering axes 74 and 76, comparably as shown in commonly owned co-pending U.S. patent application Ser. No. 11/248,482, filed Oct. 12, 2005, and application Ser. No. 11/248,483, filed Oct. 12, 2005, incorporated herein by reference. Port steering axis 74 extends through the top 40 of port tunnel 38. Starboard steering axis 76 extends through the top 48 of starboard tunnel 46.
  • Tops 40 and 48 of port and starboard tunnels 38 and 46 are at a given vertical elevation, FIG. 4, spaced vertically above lower reach 28 of keel 26 to provide port and starboard tunnels 38 and 46 with a given vertical height receiving port and starboard marine propulsion devices 54 and 64 and raising same relative to keel 26, such that keel 26 at least partially protects port and starboard marine propulsion devices 54 and 64 from striking underwater objects, including grounding, during forward propulsion of the vessel. At least a portion of port driveshaft housing 56 is in port tunnel 38 and above open bottom 42 of port tunnel 38 at port lower hull surface 30. At least a portion of port lower gear case 58 is outside of port tunnel 38 and below open bottom 42 of port tunnel 38 at port lower hull surface 30. At least a portion of starboard driveshaft housing 66 is in starboard tunnel 46 and above open bottom 50 of starboard tunnel 46 at starboard lower hull surface 32. At least a portion of starboard lower gear case 68 is outside of starboard tunnel 46 and below open bottom 50 of starboard tunnel 46 at starboard lower hull surface 32. In one preferred embodiment, port and starboard lower gear cases 58 and 68 are horizontally aligned along a horizontal projection line at or above and transversely crossing lower reach 28 of keel 26. Port lower gear case 58 includes the noted port torpedo-shaped housing having a front nose 78 with a curved surface 80 extending downwardly and aft therefrom. In one preferred embodiment, front nose 78 is horizontally aligned with lower reach 28 of keel 26, such that underwater objects struck by port lower gear case 58 slide along curved surface 80 downwardly and aft from nose 78 of the noted port torpedo-shaped housing. Starboard lower gear case 68 includes the noted starboard torpedo-shaped housing having a front nose 82, FIG. 5, with a curved surface 84 extending downwardly and aft therefrom. In the noted one preferred embodiment, front nose 82 is horizontally aligned with lower reach 28 of keel 26, such that underwater objects struck by starboard lower gear case 68 slide along curved surface 84 extending downwardly and aft from nose 82 of the noted starboard torpedo-shaped housing. Further in the noted preferred embodiment, port and starboard marine propulsion devices 54 and 64 have respective port and starboard lower skegs 86 and 88 extending downwardly from respective port and starboard lower gear cases 58 and 68 to a lower reach at a vertical level below lower reach 28 of keel 26. Each of port and starboard lower skegs 86 and 88 is a breakaway skeg, e.g. mounted by frangible shear pins such as 90, FIG. 5, to its respective lower gear case, and breaking away from its respective lower gear case upon striking an underwater object, to protect the respective marine propulsion device. FIG. 5B is an enlarged rear elevation view of a portion of skeg 88 and gear case 68 of FIG. 5, with propellers 72 and 73 removed, and showing the mounting of skeg 88 to lower gear case 68 by a breakaway channel or tongue and groove arrangement, for example tongue 89 at the top of skeg 88, and groove or channel 91 at the bottom of lower gear case 68 receiving tongue 89 in breakaway manner upon shearing of frangible pins such as 90.
  • Port marine propulsion device 54 provides propulsion thrust along a port thrust direction 102, FIG. 6, along the noted at least one port propeller shaft 60. Port marine propulsion device 54 has a port reference position 104 with port thrust direction 102 pointing forwardly parallel to keel 26. Port marine propulsion device 54 is steerable about port steering axis 74 along a first angular range 106, FIG. 7, from port reference position 104 away from keel 26, e.g. clockwise in FIG. 7. Port marine propulsion device 54 is steerable about steering axis 72 along a second angular range 108, FIG. 8, from port reference position 104 towards keel 26, e.g. counterclockwise in FIG. 8. Angular ranges 106 and 108 are unequal, and port tunnel 38 is asymmetric, to be described. Starboard propulsion device 64 provides propulsion thrust along a starboard thrust direction 110 along the noted at least one starboard propeller shaft 70. Starboard marine propulsion device 64 has a starboard reference position 112, FIG. 6, with starboard thrust direction 110 pointing forwardly parallel to keel 26. Starboard marine propulsion device 64 is steerable about starboard steering axis 76 along a third angular range 114, FIG. 7, from starboard reference position 112 towards keel 26, e.g. clockwise in FIG. 7. Starboard marine propulsion device 64 is steerable about starboard steering axis 76 along a fourth angular range 116, FIG. 8, away from keel 26, e.g. counterclockwise in FIG. 8. Third and fourth angular ranges 114 and 116 are unequal, and starboard tunnel 46 is asymmetric, to be described. In one preferred embodiment, second angular range 108 is at least twice as great as first angular range 106, and in a further preferred embodiment, first angular range 106 is at least 15 degrees, and second angular range 108 is at least 45 degrees. In the noted preferred embodiment, third angular range 114 is at least twice as great as fourth angular range 116, and in the noted further preferred embodiment, third angular range 114 is at least 45 degrees, and fourth angular range 116 is at least 15 degrees. Marine propulsion devices 54 and 64 may be rotated and steered in unison with equal angular ranges, or may be independently controlled for various steering, docking, and position or station maintaining virtual anchoring functions, and for which further reference is made to the above-noted commonly owned co-pending '482 and '483 applications.
  • Port tunnel 38 has left and right port tunnel sidewalls 120 and 122 extending vertically between top 40 of port tunnel 38 and open bottom 42 of port tunnel 38 and port lower hull surface 30. Left and right port tunnel sidewalls 120 and 122 are laterally spaced by port driveshaft housing 56 therebetween. Right port tunnel sidewall 122 has a greater vertical height and a lower vertical reach than left port tunnel sidewall 120 and limits the span of first angular range 106 to be less than the span of second angular range 108. Starboard tunnel 46 has left and right starboard tunnel sidewalls 124 and 126 extending vertically between top 48 of starboard tunnel 46 and open bottom 50 of starboard tunnel 46 at starboard lower hull surface 32. Left and right starboard tunnel sidewalls 124 and 126 are laterally spaced by starboard driveshaft housing 66 therebetween. Left starboard tunnel sidewall 124 has a greater vertical height and a lower vertical reach than right starboard tunnel sidewall 126 and limits the span of fourth angular range 116 to be less than the span of third angular range 114.
  • Port marine propulsion device 54 has a port trim tab 130 pivotally mounted thereto for contact by the water for adjusting vessel attitude and/or altering thrust vectors or otherwise affecting hydrodynamic operation of the vessel. Starboard marine propulsion device 64 has a starboard trim tab 132 pivotally mounted thereto. Port trim tab 130 is preferably pivotally mounted to port marine propulsion device 54 at a pivot axis 134, FIG. 6, aft of port driveshaft housing 56 and aft of port steering axis 74. Likewise, starboard trim tab 132 is preferably pivotally mounted to starboard marine propulsion device 64 at a pivot axis 136 aft of starboard driveshaft housing 66 and aft of starboard steering axis 76. Port trim tab 130 has an upwardly pivoted retracted position, FIGS. 1, 4, 9, and solid line in FIG. 5, and a downwardly pivoted extended position, FIG. 10, and dashed line in FIG. 5. The top 40, FIG. 4, of port tunnel 38 has a notch 140 receiving port trim tab 130 in the noted retracted position to enhance hydrodynamic profile by providing a smoother transition providing less restriction to water flow therepast. Starboard trim tab 132 likewise has an upwardly pivoted retracted position, and a downwardly pivoted extended position. The top 48 of starboard tunnel 46 has a notch 142 receiving starboard trim tab 132 in the noted retracted position to enhance hydrodynamic profile. Each trim tab may be actuated in conventional manner, e.g. hydraulically, e.g. by a hydraulic cylinder 144 having an extensible and retractable plunger or piston 146 engaging pivot pin 148 journaled to stanchions 150 of the respective trim tab. In an alternate embodiment, FIG. 5A, external hydraulic cylinder 144 a has its piston 146 a connected to the aft end of the trim tab, for a longer moment arm from the pivot axis of the trim tab if desired. In further embodiments, the trim tabs may be actuated electrically, e.g. by electrical reduction motors. The forward end of the trim tab is pivotally mounted at hinges such as 152 to mounting plate 154 of the marine propulsion device which is then mounted to the vessel hull and sealed thereto for example at sealing gasket 156. In the preferred embodiment, the forward end of the trim tab is pivotally mounted to the marine propulsion device and not to the vessel, and the aft end of the trim tab is movable in a vertical arc.
  • FIG. 11 is a side view taken from the above-noted commonly owned co-pending '482 and '483 applications and showing the arrangement of a marine propulsion device, such as 54 or 64, associated with a mechanism that is able to rotate the marine propulsion device about its respective steering axis 74 or 76. Although not visible in FIG. 11, the driveshaft of the marine propulsion device extends vertically and parallel to the steering axis and is connected in torque transmitting relation with a generally horizontal propeller shaft that is able to rotate about a propeller axis 61. The embodiment shown in FIG. 11 comprises two propellers 62 and 63, as above noted, that are attached to the propeller shaft 60. The motive force to drive the propellers 62 and 63 is provided by an internal combustion engine 160 that is located within the bilge of the marine vessel 22. The engine is configured with its crankshaft aligned for rotation about a horizontal axis. In one preferred embodiment, engine 160 is a diesel engine. Each of the two marine propulsion devices 54 and 64 is driven by a separate engine 160. In addition, each of the marine propulsion devices 54 and 64 are independently steerable about their respective steering axes 74 and 76. The steering axes are generally vertical and parallel to each other. They are intentionally not configured to be perpendicular to the bottom respective surface 30 and 32 of the hull. Instead, they are generally vertical and intersect the respective bottom surface 30 and 32 of the hull at an angle that is not equal to 90 degrees when the bottom surface of the hull is a V-type hull or any other shape which does not include a flat bottom. Driveshaft housings 56 and 66 and gear case torpedo housings 58 and 68 contain rotatable shafts, gears, and bearings which support the shafts and connect the driveshaft to the propeller shaft for rotation of the propellers. No source of motive power is located below the hull surface. The power necessary to rotate the propellers is solely provided by the internal combustion engine. The marine vessel maneuvering system in one preferred embodiment is that provided in the noted commonly owned co-pending '482 and '483 applications, allowing the operator of the marine vessel to provide maneuvering commands to a microprocessor which controls the steering movements and thrust magnitudes of two marine propulsion devices 54, 64 to implement those maneuvering commands, e.g. steering, docking, and position or station maintaining virtual anchoring functions, and the like, as above noted.
  • It is recognized that various equivalents, alternatives and modifications are possible within the scope of the appended claims.

Claims (13)

1-8. (canceled)
9. A marine vessel and drive combination comprising a marine vessel having a marine drive extending therefrom and having a water-engaging propulsor for propelling said vessel through a body of water, and a trim tab positioned directly above said propulsor.
10. The marine vessel and drive combination according to claim 9 wherein said vessel has a hull, and at least a portion of said trim tab is positioned directly below said hull.
11. The marine vessel and drive combination according to claim 10 wherein said trim tab comprises:
a forward portion directly below said hull and having a top surface substantially flush against said hull; and
an aft section extending aft from said forward section and aft beyond said hull.
12. The marine vessel and drive combination according to claim 9 wherein said drive comprises a driveshaft housing extending downwardly from said vessel and steerable about a steering axis, and said trim tab is pivoted at a pivot axis aft of said steering axis.
13. The marine vessel and drive combination according to claim 12 wherein said vessel has a hull, and said trim tab is pivotally mounted to said drive and not to said hull.
14. The marine vessel and drive combination according to claim 9 wherein said drive comprises a driveshaft housing extending downwardly from said vessel to a lower gearcase supporting said propulsor, and said trim tab is positioned along an arc intersecting said propulsor and having a center at the junction of said driveshaft housing and said vessel.
15. The marine vessel and drive combination according to claim 14 wherein said driveshaft housing extends vertically downwardly from said vessel, and said arc lies in a vertical plane.
16. A marine vessel and drive combination comprising a marine vessel having a marine drive extending therefrom and having a water-engaging propulsor for propelling said vessel through a body of water, said drive comprising a driveshaft housing extending downwardly from said vessel to a lower gearcase supporting said propulsor, and a trim tab positioned along an arc intersecting said gearcase and having a center at the junction of said driveshaft housing and said vessel.
17. The marine vessel and drive combination according to claim 16 wherein said driveshaft housing is steerable about a steering axis, and said trim tab is pivoted at a pivot axis aft of said steering axis.
18. A marine vessel and drive combination comprising a marine vessel having a marine drive extending therefrom and having a water-engaging propulsor for propelling said vessel through a body of water, said drive comprising a driveshaft housing extending downwardly from said vessel to a lower gearcase supporting said propulsor, and a plate member having at least a portion extending along and directly below said vessel and positioned along an arc intersecting said gearcase and having a center at the junction of said driveshaft housing and said vessel.
19. The marine vessel and drive combination according to claim 18 wherein said vessel has a hull, and said plate member has a top surface substantially flush against said hull.
20. The marine vessel and drive combination according to claim 18 wherein said driveshaft housing is steerable about a steering axis, and said plate member is a trim tab pivoted at a pivot axis aft of said steering axis.
US11/677,720 2005-10-21 2007-02-22 Marine Drive with Integrated Trim Tab Abandoned US20070137550A1 (en)

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US7188581B1 (en) 2007-03-13
EP1777153B1 (en) 2008-11-26
EP1777153A2 (en) 2007-04-25
DE602006003835D1 (en) 2009-01-08
EP1777153A3 (en) 2007-12-12
ATE415339T1 (en) 2008-12-15

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