US20050235895A1 - Rudder with controllable tab - Google Patents
Rudder with controllable tab Download PDFInfo
- Publication number
- US20050235895A1 US20050235895A1 US10/825,877 US82587704A US2005235895A1 US 20050235895 A1 US20050235895 A1 US 20050235895A1 US 82587704 A US82587704 A US 82587704A US 2005235895 A1 US2005235895 A1 US 2005235895A1
- Authority
- US
- United States
- Prior art keywords
- rudder
- spoiler
- shaft
- body portion
- main body
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/38—Rudders
- B63H25/381—Rudders with flaps
Definitions
- This invention relates to a rudder which is principally designed for use with a boat, and more particularly, to a rudder, including an internal, independently controllable tab or spoiler to alter the flow of fluid moving past the base of the rudder.
- trim tab on the trailing edge of boat rudders and spoilers on airplane wings have been known for a long time. These devices are used to alter the flow of fluid passing thereby to alter the traveling characteristics of the vehicle.
- U.S. Pat. No. 3,919,965 granted to Ross Nov. 18, 1975, teaches the utilization of a trim tab attached to a propeller assembly mounted forward of the transom of the boat wherein the separate propeller mechanism is rotatable about a vertical axis and includes a trim tab.
- U.S. Pat. No. 4,693,689 granted to Harada Sep. 15, 1987, features the use of a rotatable trim tab secured to the lower assembly of an outboard motor, said trim tab being rotatable about a vertical axis.
- this invention provides a boat rudder which is rotatable about a vertical shaft and having within the confines or perimeter of the boat rudder a trim tab or spoiler which is selectably rotatable by a second shaft which is co-axial with the shaft which controls the rudder.
- a further purpose of the present invention is to provide a means mounted within the outer profile of a device used to deflect fluid for interrupting the fluid flow thereby.
- FIG. 1 is an isometric view of the inventive rudder and included trim tab means.
- FIG. 2 is a side elevational view of the rudder of FIG. 1 .
- FIG. 3 is a top plan view of the rudder of FIG. 1 .
- FIG. 4 is an enlarged exploded view of the upper portion of the rudder of FIG. 1 .
- FIG. 5 is sectional view along line 5 , 5 of FIG. 2 .
- FIG. 6 is a plan view of the rudder of FIG. 1 , with the control tab moved out of the plane of the main rudder and depicting the interrupted fluid flow thereby.
- FIG. 7 is an elevational view of an alternate embodiment of the present invention.
- FIG. 8 is an enlarged view showing the intersection of the vertical shaft and the horizontal push rod.
- FIG. 9 is an enlarged view indicating the interaction between the push rod and the tab or spoiler.
- FIG. 10 is a view similar to FIG. 9 with the trim tab or spoiler in the neutral position.
- FIG. 1 there is depicted a boat rudder 2 particularly designed and adapted for use in high speed, water ski boats having a leading edge 4 , a pair of mirror image faces 6 , a configured trailing edge 8 , which is somewhat thinner than the leading edge 4 . Also seen in this view is a flared upper portion 10 of the rudder to accept a vertical control shaft 12 , which although not part of this invention, is connected to a steering mechanism within the boat.
- a trim tab or spoiler 12 which is mounted for movement about a vertical shaft relative to the rudder 2 . Further, as seen is FIG. 2 , a co-axial internal shaft 16 is rigidly connected to trim tab or spoiler 14 , permitting the independent rotation thereof.
- FIG. 4 wherein the device is shown in an exploded view, and it can be seen that the hollow shaft 12 is pinned to the rudder 2 by means of a pair of co-axial opposed pins 18 , and further that the opening 20 cut in the main body of the rudder 2 has essentially the same profile as the main rudder has, and further, that the trim tab or spoiler 14 is pinned to shaft 16 by means of pin 22 . It is to be understood that the particular shape of the trim tab is somewhat arbitrary.
- tab 14 and opening 20 cannot be perfectly symmetrical because of the thickness of 14 , and therefore, either the edges of the opening must be concave or in the alternative, the tab edge could in fact be rounded to permit relative rotation.
- the displacement of the tab 14 from the general plane of the rudder 2 creates a turbulence in the water, thereby reducing the impact upon the displaced side of the rudder.
- This displacement can be used for fine tuning the boat in operation to compensate for torque created by the propeller itself or perhaps to address a drifting caused by imperfections in the hull of the craft itself.
- FIG. 7 wherein it can be seen that the internal shaft 16 , rotatably mounted within hollow shaft 12 secured to the rudder 6 , terminates below the shaft 12 and controls trim tab 24 mounted to vertical shaft 26 by means of a push rod 28 , which is continuously urged toward the control shaft by means of a spring 30 .
- FIG. 8 wherein the bottom portion of vertical shaft 16 includes a cam portion 32 which reacts against a bolt mounted to the end of push rod 28 and controls the movement of push rod 28 against the compression spring 30 .
- the push rod 28 includes a cross pin before which extends outwardly and interacts with a pair of vertical pins 36 , secured to the lower portion of trim tab 24 , such that when the push rod 28 moves in a horizontal direction, it causes the tab 24 to respond and rotate accordingly.
- FIG. 10 is the trim tab in the retracted or neutral position.
- the present invention allows the fine tuning of a boat, and in particular a high speed ski boat, to adjust the tab or spoiler in such a manner as to cause the boat to run true.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Toys (AREA)
Abstract
A rudder primarily for use on a boat, which includes an independently operated trim tab or spoiler within the perimeter of the rudder.
Description
- This invention relates to a rudder which is principally designed for use with a boat, and more particularly, to a rudder, including an internal, independently controllable tab or spoiler to alter the flow of fluid moving past the base of the rudder.
- The trim tab on the trailing edge of boat rudders and spoilers on airplane wings have been known for a long time. These devices are used to alter the flow of fluid passing thereby to alter the traveling characteristics of the vehicle.
- Examples of known prior art include:
- U.S. Pat. No. 2,275,618, granted to Edwards Mar. 10, 1942, teaches the value of refinements in the internal shape of a nozzle which contains a ship's propeller. These downstream diversions alter the fluid flow and thus the cruising characteristics of the ship.
- U.S. Pat. No. 2,993,464, granted to Conover Jul. 25, 1961, teaches the concept of an add-on torque compensator for an outboard motor.
- U.S. Pat. No. 3,919,965, granted to Ross Nov. 18, 1975, teaches the utilization of a trim tab attached to a propeller assembly mounted forward of the transom of the boat wherein the separate propeller mechanism is rotatable about a vertical axis and includes a trim tab.
- U.S. Pat. No. 3,943,878, granted to Kirkwood et al Mar. 16, 1976, teaches the utilization of a power assist for rotating a boat motor about a vertical axis provided by a small rudder mounted along the center line of the motor and positioned in a vertical plane which passes through the axis of the propeller and shaft.
- U.S. Pat. No. 4,051,801, granted to Woodfil et al, Oct. 4, 1977, teaches a trim used in conjunction with a water drive jet.
- U.S. Pat. No. 4,693,689, granted to Harada Sep. 15, 1987, features the use of a rotatable trim tab secured to the lower assembly of an outboard motor, said trim tab being rotatable about a vertical axis.
- U.S. Pat. No. 5,746,147, granted to Carnevali May 5, 1988, teaches the utilization of an adjustable trim at the trailing edge of a rudder countering the torque generated by the propeller.
- With the above-noted prior art in mind, it is the purpose of this invention to provide a boat rudder which is rotatable about a vertical shaft and having within the confines or perimeter of the boat rudder a trim tab or spoiler which is selectably rotatable by a second shaft which is co-axial with the shaft which controls the rudder.
- A further purpose of the present invention is to provide a means mounted within the outer profile of a device used to deflect fluid for interrupting the fluid flow thereby.
-
FIG. 1 is an isometric view of the inventive rudder and included trim tab means. -
FIG. 2 is a side elevational view of the rudder ofFIG. 1 . -
FIG. 3 is a top plan view of the rudder ofFIG. 1 . -
FIG. 4 is an enlarged exploded view of the upper portion of the rudder ofFIG. 1 . -
FIG. 5 is sectional view alongline FIG. 2 . -
FIG. 6 is a plan view of the rudder ofFIG. 1 , with the control tab moved out of the plane of the main rudder and depicting the interrupted fluid flow thereby. -
FIG. 7 is an elevational view of an alternate embodiment of the present invention. -
FIG. 8 is an enlarged view showing the intersection of the vertical shaft and the horizontal push rod. -
FIG. 9 is an enlarged view indicating the interaction between the push rod and the tab or spoiler. -
FIG. 10 is a view similar toFIG. 9 with the trim tab or spoiler in the neutral position. - As seen in
FIG. 1 , there is depicted aboat rudder 2 particularly designed and adapted for use in high speed, water ski boats having a leadingedge 4, a pair of mirror image faces 6, a configuredtrailing edge 8, which is somewhat thinner than the leadingedge 4. Also seen in this view is a flaredupper portion 10 of the rudder to accept avertical control shaft 12, which although not part of this invention, is connected to a steering mechanism within the boat. - Further to be seen in this view and as explained hereinafter, is a trim tab or
spoiler 12, which is mounted for movement about a vertical shaft relative to therudder 2. Further, as seen isFIG. 2 , a co-axialinternal shaft 16 is rigidly connected to trim tab orspoiler 14, permitting the independent rotation thereof. - Reference is now had to
FIG. 4 , wherein the device is shown in an exploded view, and it can be seen that thehollow shaft 12 is pinned to therudder 2 by means of a pair of co-axial opposed pins 18, and further that the opening 20 cut in the main body of therudder 2 has essentially the same profile as the main rudder has, and further, that the trim tab orspoiler 14 is pinned toshaft 16 by means of pin 22. It is to be understood that the particular shape of the trim tab is somewhat arbitrary. - As seen in
FIG. 5 ,tab 14 and opening 20 cannot be perfectly symmetrical because of the thickness of 14, and therefore, either the edges of the opening must be concave or in the alternative, the tab edge could in fact be rounded to permit relative rotation. - As seen in
FIG. 6 , the displacement of thetab 14 from the general plane of therudder 2 creates a turbulence in the water, thereby reducing the impact upon the displaced side of the rudder. This displacement can be used for fine tuning the boat in operation to compensate for torque created by the propeller itself or perhaps to address a drifting caused by imperfections in the hull of the craft itself. - Reference is now had to
FIG. 7 wherein it can be seen that theinternal shaft 16, rotatably mounted withinhollow shaft 12 secured to therudder 6, terminates below theshaft 12 and controlstrim tab 24 mounted tovertical shaft 26 by means of apush rod 28, which is continuously urged toward the control shaft by means of aspring 30. - Reference is now had to
FIG. 8 , wherein the bottom portion ofvertical shaft 16 includes a cam portion 32 which reacts against a bolt mounted to the end ofpush rod 28 and controls the movement ofpush rod 28 against thecompression spring 30. - As seen in
FIG. 9 , thepush rod 28 includes a cross pin before which extends outwardly and interacts with a pair ofvertical pins 36, secured to the lower portion oftrim tab 24, such that when thepush rod 28 moves in a horizontal direction, it causes thetab 24 to respond and rotate accordingly. -
FIG. 10 is the trim tab in the retracted or neutral position. - Thus, as can be seen, the present invention allows the fine tuning of a boat, and in particular a high speed ski boat, to adjust the tab or spoiler in such a manner as to cause the boat to run true.
Claims (6)
1) A rudder assembly for use with a boat, comprising:
a generally thin main rudder member adapted for use in a substantially vertical plane at the stern of the boat;
a hollow cylindrical principal shaft rigidly secured to the main rudder member at the upper portion thereof, extending vertically upwardly and secured to the boat for rotation about its axis;
a unitary tab element formed from the main rudder member and hingedly secured thereto intermediate its outer boundaries at a position below the lower end of the principal shaft;
a secondary shaft secured to the tab element rotatingly received in and extending beyond the principal shaft; and
means to independently rotate the principal and the secondary shaft selectively extending the tab outward from either side of the main rudder member.
2) A rudder assembly adapted to alter the course of a vehicle by deflecting fluid flowing thereby, comprising:
a relatively thin rotatable main body portion rotatable about an axis having opposing sides adapted to interact with the relatively moving fluid, including a front, back, top and bottom, forming a perimeter; and
a spoiler intermediate the perimeter, independently rotatable about an axis relative to the rudder to interrupt the flow of fluid, said spoiler selectively moved outwardly on either side of the main body portion.
3) A rudder assembly as in claim 2 , wherein the spoiler is horizontally offset from the axis of rotation of the main body portion.
4) A rudder assembly as in claim 2 , wherein the spoiler is actuated by a push bar.
5) A rudder assembly as in claim 2 , wherein the spoiler element rotates about the same axis as the main body portion.
6) A rudder assembly as in claim 4 , wherein the spoiler is actuated through a shaft concentric with the shaft for the main body portion which actuates a push rod interconnected with the spoiler.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/825,877 US20050235895A1 (en) | 2004-04-16 | 2004-04-16 | Rudder with controllable tab |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/825,877 US20050235895A1 (en) | 2004-04-16 | 2004-04-16 | Rudder with controllable tab |
Publications (1)
Publication Number | Publication Date |
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US20050235895A1 true US20050235895A1 (en) | 2005-10-27 |
Family
ID=35135152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/825,877 Abandoned US20050235895A1 (en) | 2004-04-16 | 2004-04-16 | Rudder with controllable tab |
Country Status (1)
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US (1) | US20050235895A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2001693C2 (en) * | 2008-06-17 | 2009-12-18 | Marifin Beheer B V | Assembly from a rudder and a screw. |
CN104908917A (en) * | 2015-06-03 | 2015-09-16 | 镇江市高等专科学校 | Flexible rudder and control device thereof |
US9242710B2 (en) | 2012-08-29 | 2016-01-26 | Twin Disc, Inc. | Trimmable rudder |
JP2016159722A (en) * | 2015-02-27 | 2016-09-05 | 住友重機械マリンエンジニアリング株式会社 | Vessel |
CN110588927A (en) * | 2019-10-23 | 2019-12-20 | 中国科学院沈阳自动化研究所 | Light rudder plate system |
USD994575S1 (en) * | 2020-05-06 | 2023-08-08 | April Cottle | Rudder |
Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1500584A (en) * | 1923-04-14 | 1924-07-08 | Bertron G Harley | Rudder |
US1540079A (en) * | 1923-08-06 | 1925-06-02 | Inst Voor Aero En Hydrodynamie | Steering arrangement |
US1582391A (en) * | 1922-02-03 | 1926-04-27 | Flettner Anton | Governing of surfaces moving within alpha nonrigid medium |
US1661114A (en) * | 1917-06-16 | 1928-02-28 | Flettner Anton | Method and device for the steering of ships |
US2154321A (en) * | 1936-10-10 | 1939-04-11 | Henry C Briggs | Steering mechanism for water and aircraft |
US2178555A (en) * | 1936-10-10 | 1939-11-07 | Henry C Briggs | Safety mechanism for improving the dirigibility of ships, submarines, and aircraft |
US2275618A (en) * | 1939-08-04 | 1942-03-10 | Dravo Corp | Boat |
US2813689A (en) * | 1954-11-29 | 1957-11-19 | Boeing Co | Convolving aircraft control surfaces and articulated tabs |
US2993464A (en) * | 1957-08-05 | 1961-07-25 | Outboard Marine Corp | Propeller assisted steering and automatic torque compensation for an outboard motor |
US3120829A (en) * | 1961-12-12 | 1964-02-11 | Anchorage Inc | Boat rudder with planing angle trim plates |
US3867897A (en) * | 1973-09-10 | 1975-02-25 | Mitsui Shipbuilding Eng | Rudder for ship |
US3919965A (en) * | 1971-11-01 | 1975-11-18 | Ross Robertson | Boat propeller mounting and steering mechanism |
US3943878A (en) * | 1974-09-09 | 1976-03-16 | Kirkwood Creal E | Power steering system for boats |
US4051801A (en) * | 1976-06-23 | 1977-10-04 | Brunswick Corporation | Drive position signalling apparatus |
US4693689A (en) * | 1983-11-30 | 1987-09-15 | Sanshin Kogyo Kabushiki Kaisha | Controlling gear for outboard engine |
US5090352A (en) * | 1987-02-24 | 1992-02-25 | Corwin R. Horton | Bow foil |
US5746147A (en) * | 1996-03-25 | 1998-05-05 | Carnevali; Jeffrey D. | Trim device for a boat rudder |
US20030000444A1 (en) * | 2001-06-29 | 2003-01-02 | Katsunori Tsuboguchi | Azimuth propeller device |
US6578506B2 (en) * | 2000-06-19 | 2003-06-17 | Paul G. Bieker | Aft hung hydrofoil for reduction of water resistance of partially immersed sailing vessels |
-
2004
- 2004-04-16 US US10/825,877 patent/US20050235895A1/en not_active Abandoned
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1661114A (en) * | 1917-06-16 | 1928-02-28 | Flettner Anton | Method and device for the steering of ships |
US1582391A (en) * | 1922-02-03 | 1926-04-27 | Flettner Anton | Governing of surfaces moving within alpha nonrigid medium |
US1500584A (en) * | 1923-04-14 | 1924-07-08 | Bertron G Harley | Rudder |
US1540079A (en) * | 1923-08-06 | 1925-06-02 | Inst Voor Aero En Hydrodynamie | Steering arrangement |
US2154321A (en) * | 1936-10-10 | 1939-04-11 | Henry C Briggs | Steering mechanism for water and aircraft |
US2178555A (en) * | 1936-10-10 | 1939-11-07 | Henry C Briggs | Safety mechanism for improving the dirigibility of ships, submarines, and aircraft |
US2275618A (en) * | 1939-08-04 | 1942-03-10 | Dravo Corp | Boat |
US2813689A (en) * | 1954-11-29 | 1957-11-19 | Boeing Co | Convolving aircraft control surfaces and articulated tabs |
US2993464A (en) * | 1957-08-05 | 1961-07-25 | Outboard Marine Corp | Propeller assisted steering and automatic torque compensation for an outboard motor |
US3120829A (en) * | 1961-12-12 | 1964-02-11 | Anchorage Inc | Boat rudder with planing angle trim plates |
US3919965A (en) * | 1971-11-01 | 1975-11-18 | Ross Robertson | Boat propeller mounting and steering mechanism |
US3867897A (en) * | 1973-09-10 | 1975-02-25 | Mitsui Shipbuilding Eng | Rudder for ship |
US3943878A (en) * | 1974-09-09 | 1976-03-16 | Kirkwood Creal E | Power steering system for boats |
US4051801A (en) * | 1976-06-23 | 1977-10-04 | Brunswick Corporation | Drive position signalling apparatus |
US4693689A (en) * | 1983-11-30 | 1987-09-15 | Sanshin Kogyo Kabushiki Kaisha | Controlling gear for outboard engine |
US5090352A (en) * | 1987-02-24 | 1992-02-25 | Corwin R. Horton | Bow foil |
US5746147A (en) * | 1996-03-25 | 1998-05-05 | Carnevali; Jeffrey D. | Trim device for a boat rudder |
US6578506B2 (en) * | 2000-06-19 | 2003-06-17 | Paul G. Bieker | Aft hung hydrofoil for reduction of water resistance of partially immersed sailing vessels |
US20030000444A1 (en) * | 2001-06-29 | 2003-01-02 | Katsunori Tsuboguchi | Azimuth propeller device |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2001693C2 (en) * | 2008-06-17 | 2009-12-18 | Marifin Beheer B V | Assembly from a rudder and a screw. |
WO2009154449A1 (en) * | 2008-06-17 | 2009-12-23 | Marifin Beheer B.V. | Assembly comprising a rudder and a propeller |
CN102066193A (en) * | 2008-06-17 | 2011-05-18 | 马里芬贝黑尔私人有限公司 | Assembly comprising a rudder and a propeller |
US9242710B2 (en) | 2012-08-29 | 2016-01-26 | Twin Disc, Inc. | Trimmable rudder |
US9889918B2 (en) | 2012-08-29 | 2018-02-13 | Twin Disc, Inc. | Trimmable rudder |
JP2016159722A (en) * | 2015-02-27 | 2016-09-05 | 住友重機械マリンエンジニアリング株式会社 | Vessel |
CN104908917A (en) * | 2015-06-03 | 2015-09-16 | 镇江市高等专科学校 | Flexible rudder and control device thereof |
CN110588927A (en) * | 2019-10-23 | 2019-12-20 | 中国科学院沈阳自动化研究所 | Light rudder plate system |
USD994575S1 (en) * | 2020-05-06 | 2023-08-08 | April Cottle | Rudder |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MARINE HARDWARE, INC., WASHINGTON Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FURLONG, DONN;REEL/FRAME:015230/0879 Effective date: 20040413 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |