US3893407A - Inboard-outboard marine drive - Google Patents

Inboard-outboard marine drive Download PDF

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Publication number
US3893407A
US3893407A US508310A US50831074A US3893407A US 3893407 A US3893407 A US 3893407A US 508310 A US508310 A US 508310A US 50831074 A US50831074 A US 50831074A US 3893407 A US3893407 A US 3893407A
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United States
Prior art keywords
yoke
power leg
boat
inboard
leg
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US508310A
Inventor
John W Hurst
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Old Carco LLC
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Chrysler Corp
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Application filed by Chrysler Corp filed Critical Chrysler Corp
Priority to US508310A priority Critical patent/US3893407A/en
Priority to NO751523A priority patent/NO141154C/en
Priority to AU80836/75A priority patent/AU485936B2/en
Priority to CA226,447A priority patent/CA1029609A/en
Priority to IT23136/75A priority patent/IT1037955B/en
Priority to JP50054344A priority patent/JPS5135990A/en
Priority to FI751378A priority patent/FI60533C/en
Priority to FR7514558A priority patent/FR2285295A1/en
Priority to GB1966775A priority patent/GB1474670A/en
Priority to DE2521556A priority patent/DE2521556C3/en
Priority to SE7505721A priority patent/SE403083B/en
Priority to BR4128/75A priority patent/BR7503226A/en
Publication of US3893407A publication Critical patent/US3893407A/en
Application granted granted Critical
Priority to ES441186A priority patent/ES441186A1/en
Assigned to FIDELITY UNION TRUST COMPANY, TRUSTEE reassignment FIDELITY UNION TRUST COMPANY, TRUSTEE MORTGAGE (SEE DOCUMENT FOR DETAILS). Assignors: CHRYSLER CORPORATION
Assigned to CHRYSLER CORPORATION reassignment CHRYSLER CORPORATION ASSIGNORS HEREBY REASSIGN, TRANSFER AND RELINQUISH THEIR ENTIRE INTEREST UNDER SAID INVENTIONS AND RELEASE THEIR SECURITY INTEREST. (SEE DOCUMENT FOR DETAILS). Assignors: ARNEBECK, WILLIAM, INDIVIDUAL TRUSTEE, FIDELITY UNION BANK
Assigned to CHRYSLER CORPORATION reassignment CHRYSLER CORPORATION RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: MANUFACTURERS NATIONAL BANK OF DETROIT DONALD E. BLACK, INDIVIDUAL TRUSTEE
Assigned to CHRYSLER CORPORATION reassignment CHRYSLER CORPORATION PARTES REASSIGN, TRANSFER AND RELINQUISH THEIR ENTIRE INTEREST UNDER SAID PATENTS ALSO RELEASE THEIR SECURITY INTEREST. (SEE RECORD FOR DETAIL) Assignors: MANUFACTURERS NATIONAL BANK OF DETROIL (CORPORATE TRUSTEE) AND BLACK DONALD E., (INDIVIDUAL TRUSTEE)
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/08—Means enabling movement of the position of the propulsion element, e.g. for trim, tilt or steering; Control of trim or tilt
    • B63H20/12—Means enabling steering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/02—Mounting of propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/14—Transmission between propulsion power unit and propulsion element
    • B63H20/22—Transmission between propulsion power unit and propulsion element allowing movement of the propulsion element about at least a horizontal axis without disconnection of the drive, e.g. using universal joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/08—Means enabling movement of the position of the propulsion element, e.g. for trim, tilt or steering; Control of trim or tilt
    • B63H20/10—Means enabling trim or tilt, or lifting of the propulsion element when an obstruction is hit; Control of trim or tilt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
    • B63H20/24—Arrangements, apparatus and methods for handling exhaust gas in outboard drives, e.g. exhaust gas outlets
    • B63H20/245—Exhaust gas outlets

Definitions

  • ABSTRACT An inboard-outboard marine drive unit for boats wherein an outboard power leg is carried by an inverted yoke having a pair of downwardly extending, laterally spaced yoke arms receiving the power leg therebetween and a generally upwardly extending center post, the post being connected to the boat inboard of the stern transom.
  • the inverted yoke is steerab1e" in that steering of the power leg is accompanied by rotation of the yoke on its upwardly extending center post.
  • Raising and lowering of the outboard power leg for trimming, tilting and kick-up is by rotation of the power leg about a generally horizontal axis extending between the spaced yoke arms.
  • This invention relates to inboard-outboard marine drive units for watercraft. particularly boats, wherein an inboard engine has a rearwardly extending drive shaft coupled through universal joints to power transmission means in an outboard power leg to thereby drive a propeller carried at the lower end of the leg.
  • the outboard power leg is aft of the stern and is mounted for pivoting on two mutually generally perpendicular axes.
  • a main feature of the invention comprises the use of an inverted or downwardly disposed yoke member having an upwardly extending center post and downwardly extending laterally spaced yoke arms.
  • the outboard power leg is carried on a generally horizontal axis by the yoke arms whereas the yoke and outboard power leg together are connected to the boat by the upwardly extending center post.
  • the post provides a generally vertical axis for steering and is inside the boat where it is not exposed to water.
  • FIG. I is a partially broken away and partially sectioned port elevation of a boat with an inboardoutboard drive unit embodying the invention
  • FIG. 2 is an enlarged view of part of the port elevation of FIG. I primarily in section shown, among other features, the steerable inverted yoke and the double universal joints interconnecting the drive means between the engine and the outboard power leg; the upper portion of the outboard power leg is shown in a raised position in phantom lines.
  • FIG. 3 is a fragmentary view of the exhaust outlet for the unit taken in the direction of arrow 3 in FIG. 1.
  • FIG. 4 is a fragmentary sectional view along lines 44 of FIG. 3.
  • FIG. 5 is an elevation showing the inverted yoke member by which the outboard power leg is supported and connected to the boat;
  • FIG. 6 is a perspective stern view showing the boat and outboard power leg of FIGS. 1 and 2, and
  • FIG. 7 is an enlarged view partially in cross section, taken generally along line 7-7 of FIG. 2, showing the pivoted connector attaching the forward ends of the hydraulic cylinders to the boat and showing in phantom the variable positions of the hydraulic cylinders when the outboard power leg is turned laterally to port and starboard for steering the boat.
  • the inboardoutboard unit includes outboard power leg 10 carried aft of stern transom I2 on a partially shown boat or other watercraft I4.
  • Outboard power leg 10 includes a propeller I6 carried by a horizontal propeller shaft 18 which is driven by power transmission means including vertical drive shaft 20 through a pair of bevel gears generally indicated at 22 to propel the boat.
  • Double universal joint 34 has its center substantially at the intersection of a steering axis and a tilt axis of outboard power leg 10. These axes are described further hereinbelow.
  • the drive connection between the horizontal drive shaft means 28 and vertical drive shaft 20 includes a pair of horizontal spaced beveled gears 36 and 38, one of which is a forward gear, the other being a reverse gear. Both are supported for rotation within suitable bearings on the upper end of shaft 20.
  • a drive gear 40 carried on horizontal drive shaft means 28 drivingly engages gears 36 and 38 and causes the latter to rotate in opposed directions in the well-known manner.
  • a clutch element, generally indicated at 42, is disposed between beveled gears 36 and 38 and is carried by shaft 20 and slidable axially thereon to selectively engage gears 36 and 38 to complete the drive connection between horizontal drive shaft means 28 and vertical drive shaft 20 to thereby drive propeller I6 in the desired direction.
  • Clutch element 42 also has an intermediate neutral" position between gears 36 and 38 in which position propeller 16 is rendered inoperative. Axial movement of clutch element 42 relative to shaft 20 is effected by projecting member 44 which may be actuated by means not shown. but typically a remote control arrangement in boat 14 as is known in this art. The particular drive connection and clutch arrangement described may be varied as its specific design is not critical to the invention.
  • the mounting means for outboard power leg 10, associated with the boat between the engine and outboard power leg comprises a one-piece casting 46 although it may comprise inner and outer separate pieces positioned on each side of transom l2 and bolted or otherwise fastened together.
  • Mounting means 46 includes an outer peripheral flange portion 48 which fits sealingly (seal 49) around transom opening 30 and may be fastened to transom 12 by a series of bolts as shown in FIG. 6.
  • Mounting means 46 extends through transom opening 30 and terminates interiorly of boat 14 and transom 12 in an upper rigid mounting portion 50.
  • the lower inner portion of mounting means 46 may include a lower mounting portion 52 for exhaust connection purposes.
  • Mounting means 46 will preferably be shaped to include a hollow or indented area 54 (best shown in FIGS. 2 and 6) in the upper portion 56 of house 24 when the outboard power leg I0 is raised. Such an arrangement also provides clearance for steering in the raised position.
  • Mounting means 46 may also carry a shaft support structure and seal arrangement generally indicated at 58 for supporting horizontal drive shaft means 28 in opening 30 of transom 12.
  • An annular flexible bellows 60 is disposed about double universal joints 34 and has its ends secured forwardly to support structure 58 and rearwardly to housing portion 32 as shown in FIG. 2.
  • Exhaust receiving means 62 is fitted to lower mounting portion 52 for receiving exhaust gases from engine 26. the interconnection therebetween not being shown for the sake of simplicity. Such arrangements are well known.
  • a flexible conduit member 64 interconnects fittings 62 and housing 24 of outboard power leg for conducting engine exhaust interiorly of housing 24 and out exhaust outlet 66, which is substantially at the water line when the outboard power leg is in its normal operating position and the boat is on plane.”
  • the exhaust arrangement for the unit is shown in detail in FIGS. 3 and 4 of the drawing.
  • Exhaust outlet 66 is closed by a flexible flapper member 67 which is normally closed to prevent the entrance of water into the unit. Due to its flexibility. it opens with exhaust pulses to allow the escape of exhaust gases to the water.
  • the unit may also include a trim tab 69 for off setting torque reaction and reducing steering effort.
  • the upper rigid mounting portion 50 of mounting means 46 pivotally supports an inverted yoke member 68 on a generally vertical axis to provide for steering movement of the outboard power leg in a lateral side to side movement.
  • Yoke member 68 is inverted or downwardly extending laterally spaced yoke arms 72.
  • Yoke member 68 is generally disposed inboard of transom 12 being mounted for rotation in upper rigid mounting position 50 by connection with upwardly extending center leg 70 and suitable bearing means and fastening means indicated at '74, 76 and 78 of FIG. 2.
  • the inboard pivotal support of yoke member 68 in upper mounting portion 50 provides the reguisite steering axis and steering movement of outboard power leg 10 which is carried by yoke arms 72 through its connection with housing portion 32 as best shown in FIG. 6.
  • This connection provides a generally horizontal axis extending through yoke arms 72 at 80.
  • Any suitable pivotal connection means may be utilized to establish the connection between housing portion 32 and yoke arms 72. Carried as described above. it can be seen that there is provided a steerable yoke member fitted inboard the boat in a compact manner.
  • Steering is provided for by means of tiller arm 90 which is connected to the upwardly extending center post 70 of yoke member 68 such that lateral movement of tiller arm 90 causes yoke member 68 to pivot in mounting portion 50 thus turning yoke 68 and moving outboard power leg 10 in a rotary steering movement, i.e., a lateral side to side movement.
  • Remote control mechanisms and/or power steering mechanism may be attached to tiller arm 90 to allow steering to be accomplished from other locations in the boat remote from the tiller arm. Such arrangements are well known in the art and need not be described herein.
  • a pair of extendable/collapsible hydraulic cylinders 82 and 84 are attached to each side respectively of power leg 10 and to boat 14.
  • cylinders 82 and 84 are pivotally connected to support 86 which is itself pivoted for turning at 88 on substantially the same axis as post 70 of yoke member 68.
  • Such an arrangement provides for the maintenance of the same relative position of the hydraulic cylinders 82 and 84 as outboard power leg 10 is turned through its various steering movements.
  • the hydraulic cylinders can assume varied positions shown in phantom depending on the extent of the steering movement.
  • Such cylinders can be readily designed to provide for trimming. tilting and/or kick-up and such design details do not provide any part of this invention and need not be described herein since such matters are well known in the art.
  • support 86 may include a pair of spaced lateral side members 92 and 94 (best seen in FIGS. 1 and 7) for slidably receiving outboard power leg housing 24 therebetween to provide lateral support therefor due to side loading of the unit.
  • the extent of the engagement provided by the side members may be varied by changing their size both overall and length.
  • an inboard-outboard marine drive unit for boats having an inboard engine connected to an outboard power leg through drive shaft means and universal joint means, the improvement comprising a yoke member having a generally upwardly extending center post directed oppositely from generally downwardly extending laterally spaced yoke arms.
  • a yoke member having a generally upwardly extending center post directed oppositely from generally downwardly extending laterally spaced yoke arms.
  • the inboard-outboard drive unit according to claim 1 including means in addition to the yoke member for connecting the power leg to the boat below the universal joint means.
  • the means connecting the power leg to the boat includes a lower support means pivotally attached to the boat for turn ing on a steering axis corresponding to that for the outboard power leg and hydraulic cylinder means extending between the lower support means and the power leg for raising and lowering the power leg about the axis provided at the yoke arm.
  • the lower support means further includes a pair of spaced lateral side members for receiving at least a portion of the power leg therebetween and providing lateral support thereto.
  • an outboard power leg including propeller means adapted for connection to the flexible drive means, a downwardly disposed yoke member positioned forward of the power leg and comprising an upwardly extending center post and a pair of laterally spaced yoke arms extending downwardly from the center leg for carrying the drive means thereon, first pivot means mounting the power leg to the yoke arms for movement of the power leg about a generally horizontal axis. and second pivot means adapted for mounting the post of the yoke to the boat for lateral steering movement of the yoke and power leg.
  • an outboard power leg including power transmission means connected to the drive means including a double universal joint interconnecting the engine drive shaft and the power transmission means of the power leg, a propeller at the lower end of the power leg driven by the power transmission means, a mounting member fixedly associated with the boat between the engine and the power leg, an inverted yoke comprising an upwardly extending center post and a pair of downwardly extending laterally spaced arms, means pivotally connecting the center post of the yoke to the mounting member above the working center of the double universal joint. and means pivotally connecting the power leg to the yoke arms for fore and aft swinging of the leg.

Abstract

An inboard-outboard marine drive unit for boats wherein an outboard power leg is carried by an inverted yoke having a pair of downwardly extending, laterally spaced yoke arms receiving the power leg therebetween and a generally upwardly extending center post, the post being connected to the boat inboard of the stern transom. The inverted yoke is ''''steerable'''' in that steering of the power leg is accompanied by rotation of the yoke on its upwardly extending center post. Raising and lowering of the outboard power leg for trimming, tilting and kick-up is by rotation of the power leg about a generally horizontal axis extending between the spaced yoke arms.

Description

United States Patent 1 Hurst 1 lNBOARD-OUTBOARD MARINE DRIVE [75] Inventor: John W. Hurst, Port Huron, Mich.
[73] Assignee: Chrysler Corporation, Highland Park, Mich.
221 Filed: Sept. 23, 1974 21 App]. NO.: 508,310
[52] U.S. Cl 115/41 R [51] Int. Cl B63h 5/12 [58] Field of Search 115/41 R, 41 HT, 35
[56] References Cited UNITED STATES PATENTS 2,458,813 1/1949 Wanzer 115/35 2,499,339 11/1944 Wanzer 115/35 2,536,894 1/1951 Wanzer 115/35 2,579,221 12/1951 Wanzer... 115/18 2,755,766 7/1956 Wanzer 115/35 2,953,335 9/1960 Kiekhaefer 115/18 3,003,724 10/1961 Kiekhaefer 248/4 3,006,311 10/1961 Hansson et a1. 115/35 3,008,445 11/1961 Frank 115/41 3,036,543 5/1962 Nolt 115/41 3,088.296 5/1963 Barker et a]. 115/41 3,128,741 4/1964 Benjamen 115/34 3,136,172 6/1964 Strang 74/378 3.136.282 6/1964 Alexander, Jr. 115/35 3.136,283 6/1964 McCormick 115/35 3,136,284 6/1964 North 115135 3,136,285 6/1964 Kiekhaefer 115/35 3,136,287 6/1964 North 115/41 3,181,495 5/1965 Kiekhaefer 115/34 1 1 July8, 1975 Primary Examiner-Trygve M. Blix Assistant Examiner-Stuart M. Goldstein Attorney, Agent, or Firm-Talburtt & Baldwin [5?] ABSTRACT An inboard-outboard marine drive unit for boats wherein an outboard power leg is carried by an inverted yoke having a pair of downwardly extending, laterally spaced yoke arms receiving the power leg therebetween and a generally upwardly extending center post, the post being connected to the boat inboard of the stern transom. The inverted yoke is steerab1e" in that steering of the power leg is accompanied by rotation of the yoke on its upwardly extending center post. Raising and lowering of the outboard power leg for trimming, tilting and kick-up is by rotation of the power leg about a generally horizontal axis extending between the spaced yoke arms.
11 Claims, 7 Drawing Figures INBOARD-OUTBOARD MARINE DRIVE BACKGROUND OF THE INVENTION This invention relates to inboard-outboard marine drive units for watercraft. particularly boats, wherein an inboard engine has a rearwardly extending drive shaft coupled through universal joints to power transmission means in an outboard power leg to thereby drive a propeller carried at the lower end of the leg. The outboard power leg is aft of the stern and is mounted for pivoting on two mutually generally perpendicular axes. It is therefore free to swing laterally for steering the boat while also being free to swing vertically such that the lower end thereof may move rear wardly and upwardly in a tilting, trimming and/or kickup motion relative to the steering of the boat in order to adjust the position of the power leg relative to the boat.
A main feature of the invention comprises the use of an inverted or downwardly disposed yoke member having an upwardly extending center post and downwardly extending laterally spaced yoke arms. The outboard power leg is carried on a generally horizontal axis by the yoke arms whereas the yoke and outboard power leg together are connected to the boat by the upwardly extending center post. The post provides a generally vertical axis for steering and is inside the boat where it is not exposed to water. Other features of the invention will become apparent below.
BRIEF DESCRIPTION OF THE DRAWING FIG. I is a partially broken away and partially sectioned port elevation of a boat with an inboardoutboard drive unit embodying the invention;
FIG. 2 is an enlarged view of part of the port elevation of FIG. I primarily in section shown, among other features, the steerable inverted yoke and the double universal joints interconnecting the drive means between the engine and the outboard power leg; the upper portion of the outboard power leg is shown in a raised position in phantom lines.
FIG. 3 is a fragmentary view of the exhaust outlet for the unit taken in the direction of arrow 3 in FIG. 1.
FIG. 4 is a fragmentary sectional view along lines 44 of FIG. 3.
FIG. 5 is an elevation showing the inverted yoke member by which the outboard power leg is supported and connected to the boat;
FIG. 6 is a perspective stern view showing the boat and outboard power leg of FIGS. 1 and 2, and
FIG. 7 is an enlarged view partially in cross section, taken generally along line 7-7 of FIG. 2, showing the pivoted connector attaching the forward ends of the hydraulic cylinders to the boat and showing in phantom the variable positions of the hydraulic cylinders when the outboard power leg is turned laterally to port and starboard for steering the boat.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawing Figures, the inboardoutboard unit includes outboard power leg 10 carried aft of stern transom I2 on a partially shown boat or other watercraft I4. Outboard power leg 10 includes a propeller I6 carried by a horizontal propeller shaft 18 which is driven by power transmission means including vertical drive shaft 20 through a pair of bevel gears generally indicated at 22 to propel the boat.
Vertical drive shaft 20 is supported within outboard power leg housing 24 and is in turn driven by engine 26 mounted inboard of boat 14 through a horizontal drive shaft means 28 which extends rearwardly from the engine through a transom opening 30 and into a forwardly extending bell-shaped portion 32 of housing 24. Intermediate its length horizontal drive shaft means 28 is provided with a double universal joint genenerally indicated at 34 in FIG. 2. Double universal joint 34 has its center substantially at the intersection of a steering axis and a tilt axis of outboard power leg 10. These axes are described further hereinbelow.
The drive connection between the horizontal drive shaft means 28 and vertical drive shaft 20 includes a pair of horizontal spaced beveled gears 36 and 38, one of which is a forward gear, the other being a reverse gear. Both are supported for rotation within suitable bearings on the upper end of shaft 20. A drive gear 40 carried on horizontal drive shaft means 28 drivingly engages gears 36 and 38 and causes the latter to rotate in opposed directions in the well-known manner. A clutch element, generally indicated at 42, is disposed between beveled gears 36 and 38 and is carried by shaft 20 and slidable axially thereon to selectively engage gears 36 and 38 to complete the drive connection between horizontal drive shaft means 28 and vertical drive shaft 20 to thereby drive propeller I6 in the desired direction. Clutch element 42 also has an intermediate neutral" position between gears 36 and 38 in which position propeller 16 is rendered inoperative. Axial movement of clutch element 42 relative to shaft 20 is effected by projecting member 44 which may be actuated by means not shown. but typically a remote control arrangement in boat 14 as is known in this art. The particular drive connection and clutch arrangement described may be varied as its specific design is not critical to the invention.
The mounting means for outboard power leg 10, associated with the boat between the engine and outboard power leg comprises a one-piece casting 46 although it may comprise inner and outer separate pieces positioned on each side of transom l2 and bolted or otherwise fastened together. Mounting means 46 includes an outer peripheral flange portion 48 which fits sealingly (seal 49) around transom opening 30 and may be fastened to transom 12 by a series of bolts as shown in FIG. 6. Mounting means 46 extends through transom opening 30 and terminates interiorly of boat 14 and transom 12 in an upper rigid mounting portion 50. The lower inner portion of mounting means 46 may include a lower mounting portion 52 for exhaust connection purposes. Mounting means 46 will preferably be shaped to include a hollow or indented area 54 (best shown in FIGS. 2 and 6) in the upper portion 56 of house 24 when the outboard power leg I0 is raised. Such an arrangement also provides clearance for steering in the raised position. Mounting means 46 may also carry a shaft support structure and seal arrangement generally indicated at 58 for supporting horizontal drive shaft means 28 in opening 30 of transom 12. An annular flexible bellows 60 is disposed about double universal joints 34 and has its ends secured forwardly to support structure 58 and rearwardly to housing portion 32 as shown in FIG. 2. Exhaust receiving means 62 is fitted to lower mounting portion 52 for receiving exhaust gases from engine 26. the interconnection therebetween not being shown for the sake of simplicity. Such arrangements are well known. A flexible conduit member 64 interconnects fittings 62 and housing 24 of outboard power leg for conducting engine exhaust interiorly of housing 24 and out exhaust outlet 66, which is substantially at the water line when the outboard power leg is in its normal operating position and the boat is on plane." The exhaust arrangement for the unit is shown in detail in FIGS. 3 and 4 of the drawing. Exhaust outlet 66 is closed by a flexible flapper member 67 which is normally closed to prevent the entrance of water into the unit. Due to its flexibility. it opens with exhaust pulses to allow the escape of exhaust gases to the water. The unit may also include a trim tab 69 for off setting torque reaction and reducing steering effort.
The upper rigid mounting portion 50 of mounting means 46 pivotally supports an inverted yoke member 68 on a generally vertical axis to provide for steering movement of the outboard power leg in a lateral side to side movement. Yoke member 68, best shown in FIG. 5, is inverted or downwardly extending laterally spaced yoke arms 72. Yoke member 68 is generally disposed inboard of transom 12 being mounted for rotation in upper rigid mounting position 50 by connection with upwardly extending center leg 70 and suitable bearing means and fastening means indicated at '74, 76 and 78 of FIG. 2. The inboard pivotal support of yoke member 68 in upper mounting portion 50 provides the reguisite steering axis and steering movement of outboard power leg 10 which is carried by yoke arms 72 through its connection with housing portion 32 as best shown in FIG. 6. This connection provides a generally horizontal axis extending through yoke arms 72 at 80. Any suitable pivotal connection means may be utilized to establish the connection between housing portion 32 and yoke arms 72. Carried as described above. it can be seen that there is provided a steerable yoke member fitted inboard the boat in a compact manner.
Steering is provided for by means of tiller arm 90 which is connected to the upwardly extending center post 70 of yoke member 68 such that lateral movement of tiller arm 90 causes yoke member 68 to pivot in mounting portion 50 thus turning yoke 68 and moving outboard power leg 10 in a rotary steering movement, i.e., a lateral side to side movement. Remote control mechanisms and/or power steering mechanism may be attached to tiller arm 90 to allow steering to be accomplished from other locations in the boat remote from the tiller arm. Such arrangements are well known in the art and need not be described herein.
To control and limit the tilt, trim and/or kick-up movements of the outboard power leg 10, a pair of extendable/collapsible hydraulic cylinders 82 and 84 are attached to each side respectively of power leg 10 and to boat 14. In its preferred form. cylinders 82 and 84 are pivotally connected to support 86 which is itself pivoted for turning at 88 on substantially the same axis as post 70 of yoke member 68. Such an arrangement provides for the maintenance of the same relative position of the hydraulic cylinders 82 and 84 as outboard power leg 10 is turned through its various steering movements. As shown in FIG. 7, the hydraulic cylinders can assume varied positions shown in phantom depending on the extent of the steering movement. Thus there is provided an additional connection between the outboard power leg and the boat. Such cylinders can be readily designed to provide for trimming. tilting and/or kick-up and such design details do not provide any part of this invention and need not be described herein since such matters are well known in the art.
Additionally. support 86 may include a pair of spaced lateral side members 92 and 94 (best seen in FIGS. 1 and 7) for slidably receiving outboard power leg housing 24 therebetween to provide lateral support therefor due to side loading of the unit. The extent of the engagement provided by the side members may be varied by changing their size both overall and length.
What is claimed is:
1. In an inboard-outboard marine drive unit for boats having an inboard engine connected to an outboard power leg through drive shaft means and universal joint means, the improvement comprising a yoke member having a generally upwardly extending center post directed oppositely from generally downwardly extending laterally spaced yoke arms. means pivotally mounting the power leg to the yoke arms about an axis to allow the power leg to be rotated upwardly and rearwardly for trimming, tilting and kick-up, and means pivotally connecting the upwardly extending center post of the yoke to the boat about an axis to allow the yoke and power leg to rotate laterally for steering the boat.
2. The inboard-outboard drive unit according to claim 1 wherein the yoke member is carried by the boat so as to position the axis of the post at the horizontal drive center line inboard of the aft side of the boat stern transom.
3. The unit according to claim 2 wherein the yoke member is carried such that the axis through the yoke arms is also inboard of aft side of the stern transom.
4. The inboard-outboard drive unit according to claim 1 including means in addition to the yoke member for connecting the power leg to the boat below the universal joint means.
5. The unit according to claim 4 wherein the means connecting the power leg to the boat includes a lower support means pivotally attached to the boat for turn ing on a steering axis corresponding to that for the outboard power leg and hydraulic cylinder means extending between the lower support means and the power leg for raising and lowering the power leg about the axis provided at the yoke arm.
6. The unit according to claim 5 wherein the lower support means further includes a pair of spaced lateral side members for receiving at least a portion of the power leg therebetween and providing lateral support thereto.
7. In an article of manufacture for use with an inboard engine and rearwardly extending flexible drive means in a boat, an outboard power leg including propeller means adapted for connection to the flexible drive means, a downwardly disposed yoke member positioned forward of the power leg and comprising an upwardly extending center post and a pair of laterally spaced yoke arms extending downwardly from the center leg for carrying the drive means thereon, first pivot means mounting the power leg to the yoke arms for movement of the power leg about a generally horizontal axis. and second pivot means adapted for mounting the post of the yoke to the boat for lateral steering movement of the yoke and power leg.
8. In an inboard-outboard drive in combination with a boat having a transom and an inboard engine with a drive means extending rcarwardly from the engine through the transom. an outboard power leg including power transmission means connected to the drive means including a double universal joint interconnecting the engine drive shaft and the power transmission means of the power leg, a propeller at the lower end of the power leg driven by the power transmission means, a mounting member fixedly associated with the boat between the engine and the power leg, an inverted yoke comprising an upwardly extending center post and a pair of downwardly extending laterally spaced arms, means pivotally connecting the center post of the yoke to the mounting member above the working center of the double universal joint. and means pivotally connecting the power leg to the yoke arms for fore and aft swinging of the leg.
9. The combination according to claim 8 including means in addition to the yoke member. for connecting the power leg to the boat.
10. The combination according to claim 8 wherein the center post of the yoke member is received by the mounting member inboard the aft side of the boat transom.
II. The combination according to claim 10 wherein the entire yoke member is positioned inboard of the aft side of the boat transom.

Claims (11)

1. In an inboard-outboard marine drive unit for boats having an inboard engine connected to an outboard power leg through drive shaft means and universal joint means, the improvement comprising a yoke member having a generally upwardly extending center post directed oppositely from generally downwardly extending laterally spaced yoke arms, means pivotally mounting the power leg to the yoke arms about an axis to allow the power leg to be rotated upwardly and rearwardly for trimming, tilting and kick-up, and means pivotally connecting the upwardly extending center post of the yoke to the boat about an axis to allow the yoke and power leg to rotate laterally for steering the boat.
2. The inboard-outboard drive unit according to claim 1 wherein the yoke member is carried by the boat so as to position the axis of the post at the horizontal drive center line inboard of the aft side of the boat stern transom.
3. The unit according to claim 2 wherein the yoke member is carried such that the axis through the yoke arms is also inboard of aft side of the stern transom.
4. The inboard-outboard drive unit according to claim 1 including means in addition to the yoke member for connecting the power leg to the boat below the universal joint means.
5. The unit according to claim 4 wherein the means connecting the power leg to the boat includes a lower support means pivotally attached to the boat for turning on a steering axis corresponding to that for the outboard power leg and hydraulic cylinder means extending between the lower support means and the power leg for raising and lowering the power leg about the axis provided at the yoke arm.
6. The unit according to claim 5 wherein the lower support means further includes a pair of spaced lateral side members for receiving at least a portion of the power leg therebetween and providing lateral support thereto.
7. In an article of manufacture for use with an inboard engine and rearwardly extending flexible drive means in a boat, an outboard power leg including propeller means adapted for connection to the flexible drive means, a downwardly disposed yoke member positioned forward of the power leg and comprising an upwardly extending center post and a pair of laterally spaced yoke arms extending downwardly from the center leg for carrying the drive means thereon, first pivot means mounting the power leg to the yoke arms for movement of the power leg about a generally horizontal axis, and second pivot means adapted for mounting the post of the yoke to the boat for lateral steering movement of the yoke and power leg.
8. In an inboard-outboard drive in combination with a boat having a transom and an inboard engine with a drive means extending rearwardly from the engine through the transom, an outboard power leg including power transmission means connected to the drive means including a double universal joint interconnecting the engine drive shaft and the power transmission means of the power leg, a propeller at the lower end of the power leg driven by the power transmission means, a mounting member fixedly associated with the boat between the engine And the power leg, an inverted yoke comprising an upwardly extending center post and a pair of downwardly extending laterally spaced arms, means pivotally connecting the center post of the yoke to the mounting member above the working center of the double universal joint, and means pivotally connecting the power leg to the yoke arms for fore and aft swinging of the leg.
9. The combination according to claim 8 including means in addition to the yoke member, for connecting the power leg to the boat.
10. The combination according to claim 8 wherein the center post of the yoke member is received by the mounting member inboard the aft side of the boat transom.
11. The combination according to claim 10 wherein the entire yoke member is positioned inboard of the aft side of the boat transom.
US508310A 1974-09-23 1974-09-23 Inboard-outboard marine drive Expired - Lifetime US3893407A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US508310A US3893407A (en) 1974-09-23 1974-09-23 Inboard-outboard marine drive
NO751523A NO141154C (en) 1974-09-23 1975-04-29 INBOARD OUTBOARD DRIVING UNIT FOR BAATER
AU80836/75A AU485936B2 (en) 1975-05-05 Inboard-outboard marine drive
CA226,447A CA1029609A (en) 1974-09-23 1975-05-07 Inboard-outboard marine drive
IT23136/75A IT1037955B (en) 1974-09-23 1975-05-07 INBOARD COMMAND MARINE UNIT FOR FOURIBURDO
JP50054344A JPS5135990A (en) 1974-09-23 1975-05-08 Sennai oyobi sengaihokonikadonosenpakuyokudosochi
GB1966775A GB1474670A (en) 1974-09-23 1975-05-09 Inboard-outboard marine drive unit
FR7514558A FR2285295A1 (en) 1974-09-23 1975-05-09 INTERNAL AND OUTBOARD TRAINING UNIT FOR BOATS
FI751378A FI60533C (en) 1974-09-23 1975-05-09 INOMBORDS-UTOMBORDSDRIVENHET FOER BAOTAR
DE2521556A DE2521556C3 (en) 1974-09-23 1975-05-15 Drive unit for a boat with an inboard motor and an outboard drive
SE7505721A SE403083B (en) 1974-09-23 1975-05-20 BOAT PROPULSION UNIT WITH INU DRIVE
BR4128/75A BR7503226A (en) 1974-09-23 1975-05-22 IMPROVEMENTS IN MARITIME DRIVING UNIT ON-BOARD-DEPOPA, MANUFACTURING ARTICLE FOR DRIVING ON-BOAT WITH BOAT
ES441186A ES441186A1 (en) 1974-09-23 1975-09-23 Inboard-outboard marine drive

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US508310A US3893407A (en) 1974-09-23 1974-09-23 Inboard-outboard marine drive

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US3893407A true US3893407A (en) 1975-07-08

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US508310A Expired - Lifetime US3893407A (en) 1974-09-23 1974-09-23 Inboard-outboard marine drive

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US (1) US3893407A (en)
JP (1) JPS5135990A (en)
BR (1) BR7503226A (en)
CA (1) CA1029609A (en)
DE (1) DE2521556C3 (en)
ES (1) ES441186A1 (en)
FI (1) FI60533C (en)
FR (1) FR2285295A1 (en)
GB (1) GB1474670A (en)
IT (1) IT1037955B (en)
NO (1) NO141154C (en)
SE (1) SE403083B (en)

Cited By (13)

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DE2729963A1 (en) * 1977-07-02 1979-01-04 Bayerische Motoren Werke Ag DEVICE FOR STORING A BOAT MOTOR INSTALLED INBOARD IN A BOAT ON A MIRROR PLATE
US4137862A (en) * 1976-03-24 1979-02-06 Carl Hurth Maschinen-Und Zahnradfabrik Lift control device for propeller drive systems on watercrafts
US4216737A (en) * 1976-03-24 1980-08-12 Carl Hurth Maschinen- Und Zahnradfabrik Lift control device for propeller drive systems on watercrafts
US4395238A (en) * 1981-02-20 1983-07-26 Outboard Marine Corporation Outboard motor mounting means affording upward tilting without travel of the motor forwardly of the boat transom
FR2520697A1 (en) * 1982-02-03 1983-08-05 Volvo Penta Ab MOTOR POWERTRAIN PARTLY OUT AND IN PART ON BOARD
US4449945A (en) * 1981-08-17 1984-05-22 Outboard Marine Corporation Outboard motor mounting arrangement
US4600395A (en) * 1979-05-31 1986-07-15 Ab Volvo Penta Boat drive
US4659315A (en) * 1985-05-06 1987-04-21 Outboard Marine Corporation Hydraulic system for marine propulsion devices
US4897057A (en) * 1988-08-04 1990-01-30 Brunswick Corporation Marine propulsion unit universal drive assembly
US4957461A (en) * 1987-12-02 1990-09-18 Sanshin Kogyo Kabushiki Kaisha Idling noise silencer for marine propulsion unit
US5298794A (en) * 1991-02-08 1994-03-29 Sanshin Kogyo Kabushiki Kaisha Electrical anticorrosion device for marine propulsion device
US5755604A (en) * 1995-12-28 1998-05-26 Ab Volvo Penta Boat propeller drive unit
US20030134548A1 (en) * 2002-01-17 2003-07-17 Yoshimoto Matsuda Personal watercraft

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
JPS5322751B2 (en) * 1974-12-19 1978-07-11
SE451191B (en) * 1982-09-13 1987-09-14 Volvo Penta Ab BATAR PROPELLER DRIVE
ES2134097B1 (en) * 1996-04-29 2000-05-01 Lago Angel Romero PROPELLER GLUE FOR BOATS.

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137862A (en) * 1976-03-24 1979-02-06 Carl Hurth Maschinen-Und Zahnradfabrik Lift control device for propeller drive systems on watercrafts
US4216737A (en) * 1976-03-24 1980-08-12 Carl Hurth Maschinen- Und Zahnradfabrik Lift control device for propeller drive systems on watercrafts
DE2729963A1 (en) * 1977-07-02 1979-01-04 Bayerische Motoren Werke Ag DEVICE FOR STORING A BOAT MOTOR INSTALLED INBOARD IN A BOAT ON A MIRROR PLATE
US4600395A (en) * 1979-05-31 1986-07-15 Ab Volvo Penta Boat drive
US4395238A (en) * 1981-02-20 1983-07-26 Outboard Marine Corporation Outboard motor mounting means affording upward tilting without travel of the motor forwardly of the boat transom
US4449945A (en) * 1981-08-17 1984-05-22 Outboard Marine Corporation Outboard motor mounting arrangement
FR2520697A1 (en) * 1982-02-03 1983-08-05 Volvo Penta Ab MOTOR POWERTRAIN PARTLY OUT AND IN PART ON BOARD
US4659315A (en) * 1985-05-06 1987-04-21 Outboard Marine Corporation Hydraulic system for marine propulsion devices
US4957461A (en) * 1987-12-02 1990-09-18 Sanshin Kogyo Kabushiki Kaisha Idling noise silencer for marine propulsion unit
US4897057A (en) * 1988-08-04 1990-01-30 Brunswick Corporation Marine propulsion unit universal drive assembly
US5298794A (en) * 1991-02-08 1994-03-29 Sanshin Kogyo Kabushiki Kaisha Electrical anticorrosion device for marine propulsion device
US5755604A (en) * 1995-12-28 1998-05-26 Ab Volvo Penta Boat propeller drive unit
US20030134548A1 (en) * 2002-01-17 2003-07-17 Yoshimoto Matsuda Personal watercraft
US6739922B2 (en) * 2002-01-17 2004-05-25 Kawasaki Jukogyo Kabushiki Kaisha Personal watercraft

Also Published As

Publication number Publication date
FI751378A (en) 1976-03-24
FI60533B (en) 1981-10-30
DE2521556C3 (en) 1981-01-15
GB1474670A (en) 1977-05-25
SE403083B (en) 1978-07-31
DE2521556A1 (en) 1976-04-01
JPS5135990A (en) 1976-03-26
AU8083675A (en) 1976-11-11
SE7505721L (en) 1976-03-24
BR7503226A (en) 1976-08-03
NO141154C (en) 1980-01-23
DE2521556B2 (en) 1980-05-14
FR2285295B1 (en) 1977-07-22
NO141154B (en) 1979-10-15
FR2285295A1 (en) 1976-04-16
NO751523L (en) 1976-03-24
FI60533C (en) 1982-02-10
CA1029609A (en) 1978-04-18
ES441186A1 (en) 1977-03-16
IT1037955B (en) 1979-11-20

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