GB2152893A

GB2152893A - Marine propulsion devices

Info

Publication number: GB2152893A
Application number: GB08505283A
Authority: GB
Inventors: Arthur R Ferguson; Myron T Stevens
Original assignee: Outboard Marine Corp
Current assignee: Outboard Marine Corp
Priority date: 1981-08-17
Filing date: 1985-03-01
Publication date: 1985-08-14
Also published as: GB2138761A; HK50887A; GB8402156D0; SE8800186L; GB2138761B; HK42187A; GB2152893B; GB2138760B; GB2138760A; DE3153699C2; HK50987A; GB8402157D0; SE455493B; SE8800185L; SE468352B; GB2104023B; AU605765B2; GB2104023A; GB8402155D0; HK50787A

Description

1 GB 2 152 893 A 1

SPECIFICATION

Marine propulsion devices The invention relates generally to marine propul- 70 sion devices, such as stern drive units and out board motors.

According to the invention there is provided a marine propulsion device comprising a transom bracket including a portion adapted for mounting 75 to the rear of a boat transom and a pair of laterally spaced arms extending upwardly from said mount ing portion and including respective upper ends lo cated rearwardly of the transom when said transom bracket is boat mounted, a swivel bracket 80 comprising a lower propulsion unit mounting por tion and a pair of laterally spaced arms extending upwardly from said swivel bracket mounting por tion and including respective upper ends, means adjacent said upper ends of said transom bracket 85 arms and adjacent said upper ends of said swivel bracket arms for mounting said swivel bracket to said transom bracket for pivotal movement about a tilt axis which is located rearwardly of the transom and is horizontal when said transom bracket is boat mounted and relative to a running position with said swivel bracket mounting portion located adjacent said transom bracket mounting portion, a propulsion unit including an internal combustion engine and a propeller mounted for rotation and driven by said engine, and means including a king pin extending in said swivel bracket mounting por tion and connected to said propulsion unit to pro vide common movement of said propulsion unit with said swivel bracket about said tilt axis and pivotal steering movement of said propulsion unit relative to said swivel bracket about a second axis transverse to said tilt axis.

The invention also provides a marine propulsion device comprising a transom bracket including a pair of laterally spaced members which respec tively include lower portions having a lower end, a rearward part, and a forward part adapted for mounting to the rear of the transom, and arms re spectively extending upwardly from said forward parts of said lower portions and including respec tive upper ends located rearwardly of the transom when said transom bracket is boat mounted, a top wall joining said upper ends, and a bottom wall joining said lower ends, whereby said transom bracket constitutes a box-like frame, a swivel bracket comprising a pair of laterally spaced mem bers which respectively include lower portions having a lower end, a forward part, and a rearward part, arms which respectively include upper ends and which respectively extend upwardly from said forward parts of said swivel bracket lower portions, a bottom wall joining said swivel bracket lower ends, whereby said swivel bracket constitutes, in part, a U-shape frame, and a swivel block con nected to said rearward parts of said swivel bracket lower portions, means adjacent said upper ends of said transom bracket arms and adjacent said upper ends of said swivel bracket arms for mounting said swivel bracket to said transom 130 bracket with said U-shaped frame in inward telescopic relation to said box-like frame and for pivotal movement about a tilt axis which is located rearwardly of the transom and is horizontal when said transom bracket is boat mounted and relative to a running position with said swivel bracket lower portions located laterally adjacent said transom bracket lower portions, a king pin rotatably extending in said swivel block and fixed to said propulsion unit so as to provide common movement of said propulsion unit with said swivel bracket about said tilt axis and pivotal steering movement of said propulsion unit relative to said swivel bracket about a second axis transverse to said tilt axis, means for rotatably displacing said propulsion unit relative to said swivel bracket including an arm extending fixedly and laterally from said king pin and a hydraulic cylinder-piston assembly pivotally connected to said arm and to said swivel bracket about axes parallel to said steering axis, a tilt and trim assembly connected to said swivel bracket and including a mounting bracket mounted to said transom bracket and located within said box-like frame and adjacent to the bottom thereof, a tilt cyi- inder-piston assembly having a first end pivotally connected to said mounting bracket about a first axis which is horizontal when said mounting bracket is fixed relative to the boat transom and having a second end pivotally connected to said swivel bracket, said tilt cylinder-piston assembly being operative, in response to extension and contraction thereof, to displace said swivel bracket relative to said transom bracket about said tilt axis, a trim cylinder-piston assembly including a cylinder having a blind end pivotally connected to said mounting bracket about a second axis parallel to said first axis, and a rod end, and a piston rod extending from said cylinder through said rod end and including an outer end adapted for engage- ment and disengagement with said swivel bracket, and means connecting said trim cylinder-piston assembly and said tilt cylinder-piston assembly for angularly displacing said trim cylinder-piston assembly about said second axis in response to an- gular movement of said tilt cylinder-piston assembly about said first axis occurring in response to extension and contraction of said tilt cylinder-piston assembly, and means for passing a control line and/or a supply line through an open- ing in the boat transom while maintaining watertight integrity comprising a mounting plate mounted to said transom bracket and in surrounding relation to the opening in the transom and located within said box-like frame above said mounting bracket.

The invention further provides a marine installation comprising a boat hull having a transom with an upper edge and a marine propulsion device comprising a transom bracket including a mounting portion fixed to the rear of said boat transom below said upper edge, and a pair of laterally spaced arms extending upwardly from said mounting portion and including respective upper ends located rearwardly of said boat transom and above said upper edge thereof, a swivel bracket compris- 2 GB 2 152 893 A - 2 ing a mounting portion and a pair of laterally spaced arms extending upwardly from said swivel bracket mounting portion and including respective upper ends, means rearwardly of said transom and above said upper edge thereof and adjacent said upper ends of said transom bracket and swivel bracket arms for mounting said swivel bracket to said transom bracket for pivotal movement about a tilt axis which is horizontally located rearwardly of said transom and above said upper edge thereof and between a running position with said swivel bracket mounting portion located adjacent said transom bracket mounting portion and a raised po sition, a propulsion unit including an internal com bustion engine and a propeller mounted for 80 rotation and driven by said engine, and means in cluding a king pin extending in said swivel bracket mounting portion and connected to said propul sion unit to provide pivotal steering movement of said propulsion unit relative to said swivel bracket 85 about a second axis transverse to said tilt axis and common movement of said propulsion unit with said swivel bracket about said tilt axis and without travel of said propulsion unit over said transom upper edge or into engagement with said transom 90 when said swivel bracket is in the raised position.

The invention also provides a marine propulsion device comprising a transom bracket including a pair of laterally spaced members which respec tively include lower portions having a lower end, and a forward part, said forward parts of said lower portions comprising a mounting portion adapted for mounting to the rear of a boat tran som, and a pair of laterally spaced arms which re spectively extend upwardly from said forward parts of said lower portions, and which include re spective upper ends located rearwardly of the tran som when said transom bracket is boat mounted, and said transom bracket further including a bot tom wall joining said lower ends of said laterally 105 spaced members, whereby said transom bracket constitutes a u-shaped frame, a swivel bracket comprising a lower propulsion unit mounting por tion and a pair of laterally spaced arms extending upwardly from said swivel bracket mounting por- 110 tion and including respective upper ends, means adjacent said upper ends of said transom bracket arms and adjacent said upper ends of said swivel bracket arms for mounting said swivel bracket to said transom bracket for pivotal movement about a 115 tilt axis which is located rearwardly of the transom and is horizontal when said transom bracket is boat mounted and relative to a running position with said swivel bracket mounting portion located adjacent said transom bracket mounting portion, a 120 propulsion unit including an internal combustion engine and a propeller mounted for rotation and driven by said engine, and means including a king pin extending in said swivel bracket mounting por tion and connected to said propulsion unit to pro- 125 vide common movement of said propulsion unit with said swivel bracket about said tilt axis and pivotal steering movement of said propulsion unit relative to said swivel bracket about a second axis transverse to said tilt axis.

The invention also provides a marine installation comprising a boat hull having a transom with an upper edge and a marine propulsion device comprising a transom bracket including a mounting portion fixed to the rear of said boat transom below said upper edge, and an upper portion extending upwardly from said mounting portion and including an upper end located rearwardly of said boat transom and above said upper edge thereof, a swivel bracket comprising a mounting portion extending upwardly from said swivel bracket mounting portion and including an upper end, means rearwardly of said transom and above said upper edge thereof and adjacent said upper ends of said upper portions of said transom bracket and swivel bracket for mounting said swivel bracket to said transom bracket for pivotal movement about a tilt axis which is horizontally located rearwardly of said transom and above said upper edge thereof and for pivotal movement between a running position with said swivel bracket mounting portion located adjacent said transom bracket mounting portion and a raised position, a propulsion unit including an internal combustion engine and a propeller mounted for rotation and driven by said engine, and means including a king pin extending in said swivel bracket mounting portion and connected to said propulsion unit to provide pivotal steering movement of said propulsion unit relative to said swivel bracket about a second axis transverse to said tilt axis and common movement of said propulsion unit with said swivel bracket about said tilt axis and without travel of said propulsion unit over said transom upper edge or into engage- ment with said transom when said swivel bracket is in the raised position.

The invention also provides a marine propulsion device comprising a transom bracket including a portion which is adapted for mounting to the rear of a boat transom, and an upper portion extending upwardly from said mounting portion and including an upper end located rearwardly of the transom when said transom bracket is boat mounted, a swivel bracket comprising a lower propulsion unit mounting portion having therein a bore, and an upper portion extending upwardly from said swivel bracket mounting portion and including an upper end, means adjacent said upper ends of said upper portions of said transom bracket and said swivel bracket for mounting said swivel bracket to said transom bracket for pivotal movement about a tilt axis which is located rearwardly of the boat transom and which extends horizontally when said transom bracket is boat mounted and realtive to a running position with said swivel bracket mounting portion located adjacent said transom bracket mounting portion, a propulsion unit including an internal combustion engine and a propeller mounted for rotataion and driven by said engine, and means including a king pin fixed to said propulsion unit and received in said bore of said swivel bracket mounting portion so as to connect said propulsion unit to said swivel bracket for common movement of said propulsion unit with said swivel bracket about said tilt axis and for pivotal 3 GB 2 152 893 A 3 steering movement of said propulsion unit relative to said swivel bracket about a second axis trans verse to said tilt axis.

In order that the invention may be more fully understood, reference will now be made, by way 70 of example to the accompanying drawings, in which:

Figure 1 is a side elevational view, partially bro ken away and in section, of a marine propulsion device incorporating various of the features of the invention.

Figure 2 is a fragmentary sectional view, taken generally along line 2-2 of Figure 1.

Figure 3 is a fragmentary side elevated view, partially broken away and in section, of the marine propulsion device which is shown in Figure 1 and which is illustrated in a fully raised position.

Figure 4 is an enlarged fragmentary view taken generally along line 4-4 of Figure 3.

Figure 5 is a schematic view of a hydraulic con- trol circuit incorporated in the marine propulsion device shown in Figures 1 and 3.

Figure 6 is an enlarged fragmentary and partially schematic side elevational view, partially in sec tion, of a portion of the device shown in Figure 1.

Figure 7 is an enlarged, exploded perspective view of various of the components of the marine propulsion device shown in Figure 1 and 3 Figure 8 is a side elevational view of a further marine propulsion device incorporating various features of the invention.

Before explaining one embodiment of the inven tion in detail, it is to be understood that the inven tion is not limited in its application to the details of construction and the arrangement of components 100 set forth in the following descriptiorr or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed 105 herein is for the purpose of description and should not be regarded as limiting.

Shown in the drawings is a marine propulsion device which is in the form of an outboard motor 11 and which includes a generally conventional propulsion unit 13 incorporating a power head 15 with an internal combustion engine 17. The propul sion unit 13 also includes a lower unit 19 incorpo rating a rotatably mounted propeller 21 drivingly connected to the engine 17 through a selectively 115 operable reversing transmission 23.

The outboard motor 11 also includes a mounting assembly 31 for mounting the propulsion unit 13 to the rear of a boat transom 33 such that the propulsion unit 13 is vertically swingable between (See Figure 1) a lowermost running position with the propeller 21 submerged in water and (See Figure 3) a fully raised position with the propeller 21 out of the water, and such that the propulsion unit 13 does not engage the transom 33 and/or travel 125 forwardly over the top or upper edge 34 of the transom when the propulsion unit 13 is elevated to the fully raised position.

The propulsion unit mounting assembly 31 corn- prises a transom bracket assembly 35 including 130 (See Figures 1, 2 and 7) a mounting portion 37 adapted to be secured, by bolts or other suitable means, to the rear of the boat transom 33, and a pair of laterally spaced arms 39 extending upwardly from the mounting portion 37 and including an upper end 40 having means for pivotally mounting a swivel bracket assembly 51 for swinging movement of the swivel bracket assembly 51 about an axis 53 which is horizontal when the tran- som bracket assembly 35 is boat mounted and relative to the transom bracket assembly 35.

More particularly, while various arrangements can be employed, the transom bracket assembly 35 comprises (See especially Figure 7) a pair of laterally spaced side members or legs 61 and 63 which respectively include forward surfaces 65 and 67 adapted to engage the boat transom 33 and which constitute part of the mounting portion 37.

The spaced side members 61 and 63 are gener- ally L-shaped, each including a lower portion having a forward part including the surfaces 65 and 67 and a rearward part 69 extending rearwardly from the mounting portion 37 and having a substantial height corresponding, in general, to the height of the mounting portion 37, and a lower margin. The arms 39 extend upwardly and somewhat rearwardly from the lower portion.

The side members 61 and 63 are laterally connected at the top and bottom to provide a gener- ally hollow, box-like frame or structure. More particularly, the side members 61 and 63 respectively include, along their lower margins, respective inwardly extending flanges 75 which are interconnected by a lower transverse reinforcing member or bottom plate 77 to transversely strengthen the bottom of the transom bracket assembly 35. At the top, the arms 39 are transversely connected by an upper transverse member in the form of an angle-like member 79 providing the transom bracket assembly 35 with a top wall 81 and forming a generally box-like frame having a hollow interior.

The forward margins of the arms 39 of the transom bracket assembly 35 above the mounting por- tion 37 are also transversely connected by a decorative cover 83 which covers or merges with the top wall 81.

While other arrangements could be employed, the means pivotally mounting the swivel bracket assembly 51 from the transom bracket assembly 35 comprises a suitable tilt pin 91 extending horizontally below the upper transverse member 79 and through the upper ends of the arms 39 of the transom bracket assembly 35 and through the up- per end of the swivel bracket assembly 51.

The swivel bracket assembly 51 is also generally L-shaped and includes a lower horizontally extending leg 93 having a rearward part 95 and a forward part 97, together with a generally vertical leg 99 which extends upwardly from the forward part 97 of the lower leg 93. More particularly, while other constructions could be employed, in the illustrated construction, the swivel bracket assembly 51 comprises a Ushaped assembly 101 which provides the vertical leg 99 and the forward part 97 of the 4 GB 2 152 893 A 4 lower leg 93, and a swivel block or member 103 which is removably connected to the assembly 101 by a plurality of bolts 104 and which includes a vertical bore 105 adapted to receive a king pin 107 5 fixed to and forming a part of the propulsion unit 13.

Still more particularly, in the illustrated construction, the U-shaped assembly 101 comprises a pair of vertical side members 109 and 111 which are generally of L-shape and which are laterally spaced apart at a distance somewhat less than the spacing of the transom bracket side members 61 and 63. Adjacent their lower ends, the swivel bracket side members 109 and 111 are laterally connected by a bottom plate 113 which is located above the bottom plate 77 of the transom bracket assembly 35. Toward the upper end of the swivel bracket vertical leg 99, but below the tilt pin 91, the swivel bracket side members 109 and 111 are laterally connected by an upper bracket 115 which laterally strengthens the upper part of the U-shaped assembly 101 and which also provides an anchor for a tilt cylinder-piston assembly 117 still to be described (See Figure 1).

When the propulsion unit 13 is in the running position, the swivel bracket assembly 51 is received within the hollow interior of the transom bracket assembly 35 with the swivel block 103 extending rearwardly therefrom.

The propulsion unit 13, as previously explained, is generally of conventional construction and includes the before-mentioned king pin 107 which extends through the swivel block bore 105 and which is suitably fixedly connected at the top and bottom, preferably through suitable rubber mounts (not shown) to the propulsion unit 13 so that rotatry king pin movement in the swivel bracket bore 105 effects steering movement of the propulsion unit 13 about the rotary axis of the king pin 107.

Means are provided for effecting steering movement of the propulsion unit 13 relative to the swivel bracket assembly 51. While other arrangements can be employed, in the preferred and iflustrated construction, such means comprises an extendable and contractable link which, preferably, is in the form of a hydraulic cylinder-piston assembly 121, which, at one end, is pivotally connected to a vertically extending stud 123 supported on the rear margin of one of the swivel bracket side mem- bers 109 and 111, and which, at the other end, is pivotally connected to a stud 125 extending from an arm 127 fixedly projected laterally from the king pin 107. Accordingly, supply of hydraulic fluid through opposed conduits 129 and 131, will serve to either contract or expand the hydraulic cylinderpiston assembly 121, and thereby effect steering movement of the propulsion unit 13 relative to the swivel bracket assembly 51 and therefor relative to the boat transom 33. Preferably, the king pin 107 includes, in addition to the laterally projecting arm 127, an oppositely and laterally extending arm 133 with a vertically extending bore 135 and the other of the swivel bracket side members 109 and 111 also includes a vertical extending bore 137 so that the steering hydraulic cylinder-piston assembly 121 may be selectively attached to either side of the fore and after centerline of the marine installation.

Means are provided for vertically swingably displacing the swivel brcket assembly 51, and there- fore the propulsion unit 13, between the lowermost running position forming the lower end of a trim range (See Figure 1) and the uppermost or raised position (See Figure 3) forming the upper end of a tilt range which extends upwardly from the trim range.

While other constructions could be employed, in the illustrated construction, the means for vertically swingably displacing the swivel bracket assembly 51 comprises (See especially Figure 6) an essen- tially self-contained tilt and trim assembly 151 including a mounting bracket 153 which is separately mountable by suitable means, such as bolts (not shown), to the mounting portion 37 of the transom bracket side members 61 and 63, adjacent to the bottom of the box-like transom bracket frame. The mounting bracket 153 supports an electrically operated reversible hydraulic fluid pump 155, together with a fluid flow hydraulic circuit or control system 157 (See Figure 5) communicating with both the before-mentioned tilt cylinder-piston assembly 117 and a trim cylinderpiston assembly 161. The electrically operated pump 155 includes a motor 163 which extends inwardly through an opening 165 in the boat transom 33 and which is electrically con- nected to a battery or other source of power (not shown) forwardly of the boat transom 33.

More particularly, (as shown inFigures 1 and 6) the tilt cylinder-piston assembly 117 includes a tilt cylinder 167 and is pivotally connected, at one end,- to a transverse mounting stud 169 extending horizontally and laterally between horizontally spaced arm portions 171 extending rearwardly on the mounting bracket 153 and is pivotally connected, at its other end, to the upper bracket 115 of the swivel bracket assembly 51.

The trim cylinder-piston assembly 161 includes a trim cylinder 173 and is pivotally mounted, at the blind end of the trim cylinder 173, to a transom mounting stud 175 extending between the horizon- tally spaced mounting bracket arm portions 171 in rearward parallel relation to the stud 169 pivotally connected to the tilt cylinder-piston assembly 117.

Extending rearwardly from the other or rod end of the trim cylinder 173 is (See Figures 1 and 3) a pis ton rod 177 having an outer end 179 adapted for engagement with a socket 181 formed in the for ward surface of the swivel block 103 and between the spaced swivel bracket side legs or members 109 and 111.

As the outer end 179 of the trim piston rod 177 is not fixedly pivotally connected to the swivel bracket assembly 51, as is the tilt cylinder-piston assembly 117, and in order to locate the outer end 179 of the trim piston rod 171 in position for en- gagement with the socket 181 as the swivel bracket assembly 51 swings vertically downwardly from the tilt range into the trim range, means are provided for angularly displacing the trip cylinder-piston assembly 161 in accordance with the angular movement of the tilt cylinder-piston assembly 117 GB 2 152 893 A 5 which accompanies extension and contraction of the tilt cylinder-piston assembly 117. Accordingly, in the disclosed construction, the adjacent ends of the tilt cylinder 167 and trim cylinder 173 are re spectively provided with gear segments 191 and 193 which are in intermeshing engagement so as to maintain the trim cylinder 173 and its trim pis ton rod 177 in alignment with the socket 181 in the swivel bracket block 103 during vertical swinging of the swivel bracket assembly 51 accompanying contraction and extension of the tilt cylinder-piston assembly 51.

The hydraulic control circuit 157 between the re versible electric pump 155 and the tilt and trim cyi inder-piston assemblies 117 and 161 is shown in Figure 5 and is generally of conventional construc tion. Briefly, the pump 155 includes a first dis charge port 195 which is connected, through a first line or conduit 197 and through check valve 212, with the lower or adjacent ends of each of the tilt and trim cylinders 167 and 173. The pump 155 also includes a second discharge port 199 which is con nected, through a second line or conduit 200, through check valve 213, and through a third con duit or line 202 with the other or outer end of the 90 trim cylinder 173. In addition, the second discharge port 199 is connected, through conduit 200, through check valve 214, and through a fourth con duit or line 201, with the other or outer end of the tilt cylinder 167. The pump 155 is in fluid commu- 95 nication with a sump 203 which is supported by the mounting bracket 153. Pressure relief valves 205 and 207 are respectively connected between the first and second lines 197 and 200 and the sump 203. In addition, a manually operated releas- 100 ing valve 211 affording fluid flow between the first and fourth lines 197 and 201 is provided in order to permit manual swinging displacement of the swivel bracket assembly 51 relative to the transom bracket assembly 35. It is particularly noted that, 105 apart from securing of the mounting bracket 153 to the transom bracket assembly 35, the pivotal con nection between the swivel bracket assembly 51 and the outer or upper end of the tilt cylinder-pis- ton assembly 117 is the only connection with the 110 other outboard motor components which is made or broken in connection with installation or replacement of the trim and tilt assembly 151.

Means are provided for passing control or sup- ply lines in the form of control cables and conduits 115 through the boat transom 33, while maintaining watertight integrity thereof, so as to facilitate passage of such control cables and conduits through the interior of the box-like transom bracket assem- bly 35, and with respect to at least some of the ca- 120 bles and conduits, to facilitate passage of control cables or conduits rearwardly of the front cover 83 and between the horizontal tilt pin 91 and the top wall 81 of the transom bracket assembly 35 and/or 60 just below the horizontal tilt pin 91, and thence to 125 connection with various of the components of the outboard motor. More specifically, in the disclosed construction, such cables and conduits include (See Figure 4) push-pull cables 221 and 223, re65 spectively connected to and controlling the engine 130 throttle 235 and the reversing transmission 23, as well as a fuel line 237 and a pair of fluid conduits or supply lines 239 and 241 communicating with the steering cylinder-piston assembly conduits 129 and 131 so as to control steering of the propulsion unit 13, and an electrical harness 243 which includes electrical connections between the propulsionunit 13 and a battery (not shown) and an ignition control. Less than all of the above cables and conduits or more than the above-enumerated cables and conduits can be passed through the boat transom 33.

While various other constructions could be employed, in the illustrated construction, the means for passing such cables and conduits through the boat transom 33 comprises a mounting bracket or plate 251 which is adapted to be mounted to the mounting portions 37 of the transom bracket assembly side member 61 and 63 between the tran- som bracket logs or side members 61 and 63 and in such a manner as to sealingly engage the transom above the tilt and trim assembly mounting bracket 153. The mounting plate 251 includes an outer periphery or margin 253 which extends beyond the margin of a hole or opening 255 in the boat transom 33 through which the cable and conduits pass.

A gasket 257 is provided between the outer margin 253 of the mounting plate 251 and the boat transom 33 to maintain watertight integrity.

Still more particularly, the mounting plate 251 includes a central portion 259 which is located inwardly of the peripheral portion 253, which includes an inclined surface 261 extending upwardly and forwardly into the transom opening 255, and which includes a bore or opening 263 for upwardly and rearwardly inclined passage therethrough of the electrical harness 243, as well as a bore or opening 265 for upward and rearward inclined passage there-through of the throttle and shift control cables 221 and 223. Suitable sealing means, such as respective grommets 273 and 275 engaging both the inclined surface 261 and the cables and/or conduits 243, 221 and 223, together with anchors 283 and 285 suitably connected to the mounting plate 251 and arranged to maintain the grommets 273 and 275 in sealing engagement with the lines 243, 221 and 223 and with the inclined surface 261 and provided so as to maintain watertight integrity.

In connection with the fuel and hydraulic fluid steering connections, the fuel line 237 and the steering fluid conduit lines 239 and 241 are suitably connected to the mounting plate 251 and extend through the mounting plate 251 from the forward to the rearward surfaces thereof and forwardly of the boat transom 33. Provided on the mounting plate 251 and extending rearwardly are suitable respective nipples or fittings 293, 295, and 297 which communicate with the forwardly extending conduits 237, 239 and 241 and which are adapted to be connected to a rearwardly extending fuel line 299 connected to the engine 17 and to the hydraulic steering conduits 129 and 131.

It is also noted that the throttle cable 221, and 6 GB 2 152 893 A 6 the shift cable 223 extend upwardly and rearwardly behind the frontal wall or cover 83 and over the top of the tilt pin 91 and under the top wall 81 and thence to connections with the propulsion unit 13.

The electrical harness 243, the fuel line 299, and the hydraulic steering conduits 129 and 131 extend upwardly and rearwardly behind the frontal wall or cover 83 and under the bottom of the tilt pin 91 being secured thereto by clamp 85, (See Figure 4) and thence to connections with the propulsion unit 13.

Means 301 are also provided (See Figure 6) for sensing and informing the operator of the angular tilt or trim position of the propulsion unit 13. Thus, in the disclosed construction, there is provided a remote indicator 303 which advises the operator of the angular position of the propulsion unit 13 within the trim range and which is electrically connected to a sensing device in the form of a variable resistor or potentiometer 305 having a wiper forming an interior part of a pivotally mounted lever having an exteriorly located arm 311.

The sensor or resistor 305 is supported on a bracket member 315 which is fixed to the mount- ing bracket 153 of the tilt and trim assembly 151 either directly or through other components fixed to the mounting plate 153. More particularly, the sensor or resistor 303 is fixedly mounted on a leg 317 which, in turn, is fixed to the bracket member 315 so that the outer end of the arm 311 engages the under surface of the trim cylinder 173. Preferably, the lever or arm 311 is baised by a suitable spring 319 into engagement with the undersurface of the trim cylinder 173. Thus, angular movement of the trim cylinder 173 about the axis of the mounting stud 175 in response to angular movement of the populsion unit 13 about the tilt axis 53 results in positioning of the arm 311 in accordance with the position of the propulsion unit 13 and pro- vides for a suitable indication at the remote indica- 105 tor 303.

It is believed that electrical circuits for connecting the indicator 303 and sensor or resistor 305 are well known in the art and need not be described.

In order to accommodate mounting on boat transoms having different angles with respect to the vertical, the arrangement for mounting the leg 317 to the bracket member 315 includes spaced first and second bolt holes 321 and 323, respectively, in one of the bracket member 315 and the leg 317, together with spaced first and second slots 331 and 333, respectively, in the other of the bracket mem ber 315 and the leg 317, and a pair of bolts 341 and 343 which are insertable through the first and second bolt holes 321 and 323 and through the first and second slots 331 and 333 in order to vary the attitude of the leg 317 to accommodate boats having different transom angles.

Alternatively, the bracket member 315 or leg 317 could be fixed to the transom bracket assembly 35.

In addition, if desired, the resistor arm 311 could be supported from the transom bracket assembly or swivel bracket assembly 51 for engagement with the tilt cylinder 167.

In order to enclose at last some of the control 130 cables or lines 221, 223, 237, 239, 241, and 243 and to substantially enclose the tilt cylinder 117 as well as the cylinder of the steering cylinder-piston assembly 121 during normal running orientation of the propulsion unit 13, the swivel bracket assembly 51 includes (See Figure 7) rear covers 401 and 408 which, together with the laterally spaced side members 99 and 111, constitutes a swivel bracket housing. The rear covers 401 and 408 extend trans- versely between the upwardly extending side members 99 and 111 and, near the lower end thereof, also extends rearwardly to substantially enclose the cylinder of the steering cylinder-piston assembly 121. The rear covers include, at the rear- ward end thereof, lower vertical walls 403 includ- ing horizontally extending slots 405 through which extend the piston rod of the steering cylinder-pis ton assembly 121, as well as the fuel line 237 and the electrical harness 243. The fuel line 237 and electrical harness 243 enter into the power head 15 through the bottom pan 407 of the power head 15 in the area above the steering axis or king pin bore so as to minimize movement of the fuel line 237 and electrical harness 243 during steering ac tion.

The throttle and shift control cables 221 and 223 exit from the rear of the swivel bracket housing ad jacent the top and at one side thereof to facilitate connection thereof to the usual connections pro- vided in prior outboard motor constructions.

In summary, the marine propulsion device 11 includes a propulsion unit 13 which is adapted to be swung upwardly from a lowered running position (See Figure 1) to a raised position (See Figure 3) without engaging the boat transom 33 or passing forwardly over the top edge 34 thereof. In addition, the arrangement for trimming and tilting the propulsion unit 13 includes an essentially self-contained tilt and trim assembly 151 which is mounted on the transom bracket assembly 35. Still further in addition, the various cables and conduits which control operation of the marine propulsion device 11 are passed through the boat transom opening 255 by means of the plate 251 which is also mounted to the transom bracket assembly 35 and above the tilt and trim assembly 161. Thus, the disclosed propulsion unit 13 neither engages the boat transom 33 or travels over the top edge 34 thereof during tilting. Nor do any control cables or supply conduits pass over the top edge 34 of the boat transom 33 in route to the marine propulsion device 11.

If desired, the mounting bracket 153 of the tilt and trim assembly 151 could be mounted directly to the boat transom independently of the transom bracket assembly 35, as could the mounting plate 251.

Shown in Figure 8 is another embodiment of an outboard motor 110 which incorporates various of the features of the invention. As distinguished from the outboard motor 11 shown in Figure 1, the outboard motor 110 shown in Figure 8 includes a drive shaft 73 which extends at an upward and forward incline and the arrangement for mounting the propulsion unit 13 to the boat transom 33 is such 7 that the tilt axis 53 is located below the upper edge of the transom 33, Reference is made to the Applicants' related Applications Nos. 8402154, 8402155, 8402156, 8402157, and 8136105.

Claims

1. A marine propulsion device comprising a transom bracket including a portion adapted for mounting to the rear of a boat transom and a pair of laterally spaced arms extending upwardly from said mounting portion and including respective up per ends located rearwardly of the transom when said transom bracket is boat mounted, a swivel bracket comprising a lower propulsion unit mount ing portion and a pair of laterally spaced arms ex tending upwardly from said swivel bracket mounting portion and including respective upper ends, means adjacent said upper ends of said tran som bracket arms and adjacent said upper ends of said swivel bracket arms for mounting said swivel bracket to said transom bracket for pivotal move ment about a tilt axis which is located rearwardly of the transom and is horizontal when said tran som bracket is boat mounted and relative to a run ning position with said swivel bracket mounting portion located adjacent said transom bracket mounting portion, a propulsion unit including an internal combustion engine and a propeller 95 mounted for rotation and driven by said engine, and means including a king pin extending in said swivel bracket mounting portion and connected to said propulsion unit to provide common move ment of said propulsion unit with said swivel bracket about said tilt axis and pivotal steering movement of said propulsion unit relative to said swivel bracket about a second axis transverse to said tilt axis.

2. A marine propulsion device in accordance with Claim 1 wherein said transom bracket includes a pair of laterally spaced members which respectively include lower portions having a lower end, and a forward part, said forward parts of said lower portions comprising said mounting portion, wherein said transom bracket arms respectively form parts of said laterally spaced members and respectively extend upwardly from said forward parts of said lower portions, wherein said transom bracket further includes a top wall joining said upper ends of said arms, and wherein said transom bracket further includes a bottom wall joining said lower ends of said laterally spaced members, whereby said transom bracket constitutes a box- like frame.

3. A marine propulsion device in accordance with Claim 1 wherein said swivel bracket includes a pair of laterally spaced members which respectively include lower portions having a lower end, a forward part and a rearward part, wherein said swivel bracket arms respectively form parts of said laterally spaced members and respectively extend upwardly from said forward parts of said lower portions, wherein said swivel bracket further in- cludes a bottom wall joining said lower ends of GB 2 152 893 A 7 said laterally spaced members, whereby said swivel bracket constitutes, in part, a U-shape frame, and wherein said swivel bracket further includes a swivel block constituting said mounting portion and connected to said rearward parts of said lower portions of said laterally spaced mem bers, and wherein said means joining said propul sion unit and said swivel bracket includes a king pin passing through said swivel block.

4. A marine propulsion device in accordance with Claim 1 wherein said transom bracket in cludes a pair of laterally spaced mernbers which respectively include lower portions having a lower end, and a forward part, said forward parts of said lower portions of said transom bracket members comprising said mounting portion, wherein said transom bracket arms respectively form parts of said transom bracket members and respectively extend upwardly from said forward parts of said lower portions, wherein said transom bracket further includes a top wall joining said upper ends of said arms, and wherein said transom bracket further includes a bottom wall joining said lower ends of said members whereby said transom bracket constitutes a box-like frame, wherein said swivel bracket includes a pair of laterally spaced members which respectively include lower portions having a lower end, a forward part, and a rearward part, wherein said swivel bracket arms respectively form parts of said swivel bracket members and respectively extend upwardly from said forward parts of said lower portions of said swivel bracket members, wherein said swivel bracket further includes a bottom wall joining said lower ends of said swivel bracket members, whereby said swivel bracket constitutes, in part, a U-shape frame, and wherein said swivel bracket U-shaped frame is telescopi cally received within said transom bracket box-like fra m e.

5. A marine propulsion device in accordance with Claim 1 wherein said transom bracket com prises a box-like frame, wherein said swivel bracket constitutes a U-shaped frame, and wherein said means mounting said swivel bracket to said transom bracket locates said U-shaped frame in inward telescopic relation to said box-like frame.

6. A marine propulsion device in accordance with Claim 5 and further including a tilt and trim assembly connected to said swivel bracket and in- cluding a mounting bracket mounted to said transom bracket and located within said box-like frame and adjacent to the bottom thereof.

7. A marine propulsion device in accordance with Claim 6 wherein said tilt and trim assembly further includes a tilt cylinder-piston assembly having a first end pivotally connected to said mounting bracket about a first axis which is horizontal when said mounting bracket is fixed relative to the boat transom and having a second end pivotally connected to said swivel bracket, said tilt cylinderpiston assembly being operative, in response to extension and contraction thereof, to displace said swivel bracket relative to said transom bracket about said tilt axis, a trim cylinder- piston assembly including a cylinder having a blind end pivotally 8 GB 2 152 893 A 8 connected to said mounting bracket about a second axis parallel to said first axis, and a rod end, and a piston rod extending from said cylinder through said rod end and including an outer end adapted for engagement and disengagement with said swivel bracket, and means connecting said trim cylinder-piston assembly and said tilt cylinderpiston assembly for angularly displacing said trim cylinder-piston assembly about said second axis in response to angular movement of said tilt cylinderpiston assembly about said first axis occurring in response to extension and contraction of said tilt cylinder-piston assembly.

8. A marine propulsion device in accordance with Claim 7 and further including means for passing a control line andlor a supply line through an opening in the boat transom while maintaining water-tight integrity comprising a mounting plate mounted to said transom bracket and in surround- ing relation to the opening in tile transom and located within said box- like frame above said mounting bracket.

9. A marine propulsion device in accordance with Claim 8 wherein said mounting plate includes a first surface having a peripheral portion adapted to be sealingly fixed to the margin around the opening in the boat transom and a second surface remote from the boat transom, and a fluid supply line extending through said mounting plate between said first and second surfaces, while maintaining water-tight integrity and including, adjacent one of said first and second surfaces, a fitting communicating with said supply line and adapted for detachable connection to a continuation of said fluid supply line.

10. A marine propulsion device in accordance with Claim 8 wherein said mounting plate includes a first surface having a peripheral portion adapted to be sealingly fixed to the margin around the opening in the boat transom, a second surface remote from the boat transom, and a central portion located inwardly of said peripheral portion and including therein a bore extending between said first and second surfaces, a control line passing through said bore, a grommet between said bore and said control line, and an anchor fixed to said central portion of said mounting plate and engaging said grommet to sealingly engage said grommet between said control line and said central portion of said mounting plate, whereby to provide water-tight integrity.

11. A marine propulsion device in accordance with Claim 5 and further including means for passing a control line and/or a supply line through an opening in the boat transom while maintaining water-tight integrity and comprising a mounting plate mounted to said transom bracket in surrounding relation to the opening in the transom and located within said box-like frame, and a con- trol line andlor a fluid supply line passing through said plate.

12. A marine propulsion device in accordance with claim 11 wherein said mounting plate includes a first surface having a peripheral portion adapted to be sealingly fixed to the margin around 130 the opening in the boat transom and a second surface remote from the boat transom, and a fluid supply line extending through said mounting plate between said first and second surfaces, while maintaining water-tight integrity and including, ad- jacent one of said first and second surfaces, a fit ting forming a part of said supply line and including means for detachable connection to a continuation of said fluid supply line.

13. A marine propulsion device in accordance with Claim 11 wherein said mounting plate in cludes a first surface having a peripheral portion adapted to be sealingly fixed to the margin around the opening in the boat transom, a second surface remote from the boat transom, and a central portion located inwardly of said peripheral portion and including therein a bore extending between said first and second surfaces, a control line passing through said bore, a grommet between said bore and said control line, and an anchor fixed to said central portion of said mounting plate and engaging said grommet to sealingly engage said grommet between said control line and said central portion of said mounting plate, whereby to provide water-tight integrity.

14. A marine propulsion device in accordance with Claim 1 wherein said means connecting said propulsion unit to said mounting portion of said swivel bracket includes a king pin extending in said swivel bracket and fixed to said propulsion unit, and means for rotatably displacing said king pin relative to said swivel bracket including an arm extending fixedly and laterally from said king pin and an extendable and contractable link pivotally con- nected to said arm and to said swivel bracket about axes parallel to said steering axis.

15. A marine propulsion device in accordance with Claim 14 wherein said link comprises a hydraulic cylinder-piston assembly. 105

16. A marine propulsion device comprising a transom bracket including a pair of laterally spaced members which respectively include lower portions having a lower end, a rearward part, and a forward part adapted for mounting to the rear of the transom, and arms respectively extending upwardly from said forward parts of said lower portions and including respective upper ends located rearwardly of the transom when said transom bracket is boat mounted, a top wall joining said upper ends, and a bottom wall joining said lower ends, whereby said transom bracket constitutes a box-like frame, a swivel bracket comprising a pair of laterally spaced members which respectively include;ower portions having a lower end, a forward part, and a rearward part, arms which respectively include upper ends and which respectively extend upwardly from said forward parts of said swivel bracket lower portions, a bottom wall joining said swivel bracket lower ends, whereby said swivel bracket constitutes, in part, a U-shape frame, and a swivel block connected to said rearward parts of said swivel bracket lower portions, means adjacent said upper ends of said transom bracket arms and adjacent said upper ends of said swivel bracket arms for mounting said swivel bracket to said tran- 9 GB 2 152 893 A 9 som bracket with said U-shaped frame in inward telescopic relation to said box-like frame and for pivotal movement about a tilt axis which is located rearwardly of the transom and is horizontal when said transom bracket is boat mounted and relative 70 to a running position with said swivel bracket lower portions located laterally adjacent said tran som bracket lower portions, a king pin rotatably extending in said swivel block and fixed to said propulsion unit so as to provide common move- 75 ment of said propulsion unit with said swivel bracket about said tilt axis and pivotal steering movement of said propulsion unit relative to said swivel bracket about a second axis transverse to said tilt axis, means for rotatably displacing said 80 propulsion unit relative to said swivel bracket in cluding an arm extending fixedly and laterally from said king pin and a hydraulic cylinder-piston as sembly pivotally connected to said arm and to said swivel bracket about axes parallel to said steering 85 axis, a tilt and trim assembly connected to said swivel bracket and including a mounting bracket mounted to said transom bracket and located within said box-like frame and adjacent to the bot tom thereof, a tilt cylinder-piston assembly having 90 a first end pivotally connected to said mounting bracket about a first axis which is horizontal when said mounting bracket is fixed relative to the boat transom and having a second end pivotally con nected to said swivel bracket, said tilt cylinder-pis- 95 ton assembly being operative, in response to extension and contraction thereof, to displace said swivel bracket relative to said transom bracket about said tilt axis, a trim cylinder-piston assembly including a cylinder having a blind end pivotally 100 connected to said mounting bracket about a sec ond axis parallel to said first axis, and a rod end, and a piston rod extending from said cylinder through said rod end and including an outer end adapted for engagement and disengagement with 105 said swivel bracket, and means connecting said trim cylinder-piston assembly and said tilt cylinder piston assembly for angularly displacing said trim cylinder-piston assembly about said second axis in response to angular movement of said tilt cylinder- 110 piston assembly about said first axis occurring in response to extension and contraction of said tilt cylinder-piston assembly, and means for passing a control line and/or a supply line through an open- ing in the boat transom while maintaining watertight integrity comprising a mounting plate mounted to said transom bracket and in surrounding relation to the opening in the transom and located within said box-like frame above said mounting bracket.

17. A marine propulsion device in accordance with Claim 16 wherein said mounting plate includes a first surface having a peripheral portion adapted to be sealingly fixed to the margin around the opening in the boat transom and a second surface remote from the boat transom, and a fluid supply line extending through said mounting plate between said first and second surfaces, while maintaining water-tight integrity and including, ad- jacent one of said first and second surfaces, a fit- ting communicating with said supply line and adapted for detachable connection to a continuation of said fluid supply line.

18. A marine propulsion device in accordance with Claim 16 wherein said mounting plate includes a first surface having a peripheral portion adapted to be sealingly fixed to the margin around the opening in the boat transom, a second surface remote from the boat transom, and a central portion located inwardly of said peripheral portion and including therein a bore extending between said first and second surfaces, a control line passing through said bore, a grommet between said bore and said control line, and an anchor fixed to said central portion of said mounting plate and engaging said grommet to sealingly engage said grommet between said control line and said central portion of said mounting plate, whereby to provide water-tight integrity.

19. A marine installation comprising a boat hull having a transom with an upper edge and a marine propulsion device comprising a transom bracket including a mounting portion fixed to the rear of said boat transom below said upper edge, and a pair of laterally spaced arms extending upwardly from said mounting portion and including respective upper ends located rearwardly of said boat transom and above said upper edge thereof, a swivel bracket comprising a mounting portion and a pair of laterally spaced arms extending upwardly from said swivel bracket mounting portion and including respective upper ends, means rearwardly of said transom and above said upper edge thereof and adjacent said upper ends of said transom bracket and swivel bracket arms for mounting said swivel bracket to said transom bracket for pivotal movement about a tilt axis which is horizontally located rearwardly of said transom and above said upper edge thereof and between a running position with said swivel bracket mounting portion located adjacent said transom bracket mounting portion and a raised position, a propulsion unit including an internal combustion engine and a propeller mounted for rotation and driven by said engine, and means including a king pin extending in said swivel bracket mounting portion and connected to said propulsion unit to provide pivotal steering movement of said propulsion unit relative to said swivel bracket about a second axis transverse to said tilt axis and common movement of said propulsion unit with said swivel bracket about said tilt axis and without travel of said propulsion unit over said transom upper edge or into engagement with said transom when said swivel bracket is in the raised position.

20. A marine propulsion device comprising a transom including a pair of laterally spaced members which respectively include lower portions having a lower end, and a forward part, said for- ward parts of said lower portions comprising a mounting portion adapted for mounting to the rear of a boat transom, and a pair of laterally spaced arms which respectively extend upwardly from said forward parts of said lower portions, and which include respective upper ends located rear- GB 2 152 893 A wardly of the transom when said transom bracket is boat mounted, and said transom bracket further including a bottom wall joining said lower ends of said laterally spaced members, whereby said tran som bracket constitutes a U-shaped frame, a 70 swivel bracket comprising a lower propulsion unit mounting portion and a pair of laterally spaced arms extending upwardly from said swivel bracket mounting portion and including respective upper ends, means adjacent said upper ends of said tran- 75 som bracket arms and adjacent said upper ends of said swivel bracket arms for mounting said swivel bracket to said transom bracket for pivotal move ment about a tilt axis which is located rearwardly of the transom and is horizontal when said tran som bracket is boat mounted and relative to a run ning position with said swivel bracket mounting portion located adjacent said transom bracket mounting portion, a propulsion unit including an internal combustion engine and a propeller mounted for rotation and driven by said engine, and means including a king pin extending in said swivel bracket mounting portion and connected to said propulsion unit to provide common move ment of said propulsion unit with said swivel bracket about said tilt axis and pivotal steering movement of said propulsion unit relative to said swivel bracket about a second axis transverse to said tilt axis.

21. A marine installation comprising a boat hull 95 having a transom with an upper edge and a marine propulsion device comprising a transom bracket including a mounting portion fixed to the rear of said boat transom below said upper edge, and an upper portion extending upwardly from said mounting portion and including an upper end located rearwardly of said boat transom by above said upper edge thereof, a swivel bracket comprising a mounting portion and an upper portion ex- tending upwardly from said swivel bracket mounting portion and including an upper end, means rearwardly of said transom and above said upper edge thereof and adjacent said upper ends of said upper portions of said transom bracket and swivel bracket for mounting said swivel bracket to said transom bracket for pivotal movement about a tilt axis which is horizontally located rearwardly of said transom and above said upper edge thereof and for pivotal movement between a running posi- tion with said swivel bracket mounting portion located adjacent said transom bracket mounting portion and a raised position, a propulsion unit including an internal combustion engine and a propeller mounted for rotation and driven by said engine, and means including a king pin extending in said swivel bracket mounting portion and connected to said propulsion unit to provide pivotal steering movement of said propulsion unit relative to said swivel bracket about a second axis trans- verse to said tilt axis and common movement of said propulsion unit with said swivel bracket about said tilt axis and without travel of said propulsion unit over said transom upper edge or into engagement with said transom when said swivel bracket 65;s in the raised position.

22. A marine propulsion device comprising a transom bracket including a portion which is adapted for mounting to the rear of a boat transom, and an upper portion extending upwardly from said mounting portion and including an upper end located rearwardly of the transom when said transom bracket is boat mounted, a swivel bracket comprising a lower propulsion unit mounting portion having therein a bore, and an upper portion extending upwardly from said swivel bracket mounting portion and including an upper end, means adjacent said upper ends of said upper portions of said transom bracket and said swivel bracket for pivotal movement about a tilt axis which is located rearwardly of the boat transom and which extends horizontally when said transom bracket is boat mounted and relative to a running position with said swivel bracket mounting portion located adjacent said transom bracket mounting portion, a propulsion unit including an internal combustion engine and a propeller mounted for rotation and driven by said engine, and means including a king pin fixed to said propulsion unit and received in said bore of said swivel bracket mount- ing portion so as to connect said propulsion unit to said swivel bracket for common movement of said propulsion unit with said swivel bracket about said tilt axis and for pivotal steering movement of said propulsion unit relative to said swivel bracket about a second axis transverse to said tilt axis.

Printed in the UK for HMSO, D8818935, 6185. 7102. Published by The Patent Office, 25 Southampton Buildings, London, WC2A lAY, from which copies may be obtained.