CA1317165C - Exhaust system for a boat propulsion device - Google Patents
Exhaust system for a boat propulsion deviceInfo
- Publication number
- CA1317165C CA1317165C CA000567972A CA567972A CA1317165C CA 1317165 C CA1317165 C CA 1317165C CA 000567972 A CA000567972 A CA 000567972A CA 567972 A CA567972 A CA 567972A CA 1317165 C CA1317165 C CA 1317165C
- Authority
- CA
- Canada
- Prior art keywords
- boat
- cavity
- exhaust
- lower unit
- hull
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Exhaust Silencers (AREA)
Abstract
ABSTRACT
A propulsion device for a boat which mounts throuqh a hole in a bottom surface of a boat includes an exhaust passageway means which connects between an engine positioned inside the boat and a propeller drive having an exhaust passageway therethrough positioned under the boat.
The propulsion device induces a mounting assembly, a steering assembly rotatably connecting the propeller drive to the mounting assembly for steering the propeller drive about a generally vertical axis, and a trimming assembly swingingly connecting the propeller drive to the steering assembly for trimming/tilting of the propeller drive about a generally horizontal axis. The exhaust passageway includes a flexible portion connecting between the engine and the propeller drive to provide an exhaust connection during steering and trimming of the drive.
A propulsion device for a boat which mounts throuqh a hole in a bottom surface of a boat includes an exhaust passageway means which connects between an engine positioned inside the boat and a propeller drive having an exhaust passageway therethrough positioned under the boat.
The propulsion device induces a mounting assembly, a steering assembly rotatably connecting the propeller drive to the mounting assembly for steering the propeller drive about a generally vertical axis, and a trimming assembly swingingly connecting the propeller drive to the steering assembly for trimming/tilting of the propeller drive about a generally horizontal axis. The exhaust passageway includes a flexible portion connecting between the engine and the propeller drive to provide an exhaust connection during steering and trimming of the drive.
Description
19~/3 1 3 t 7 ~ 65 ACKGROUND OF THE INVENTION
The field of the present invention is an exhaust system for a boat propulsion device and more particularly concerns an exhaust system for a boat propulsion device having an engine inside a boat and a steerable and trimmable drive under a boat. -Prior boat propulsion devices which provide steering and trimming of a drive include the stern drive andthe outboard. The stern drive has an engine inside the boat and a orive at the rear of the boat. The exhaust system in the stern drive connects From the engine; to the transom mount; to an exhaust bellows under the gimbal; to an internal passageway into the lower unit; and exhausts at the rear of the lower unit.
The outboard is an unit assembly of engine and drive mounted outside the boat. The exhaust passageway is internal from the engine to the lower unit.
The exhaust systern for -these prior boa-t propulsion devices is arranged to confonn to the struc-ture of the devices.
Since these devices are complex, the exhaus-t system adds to -this complexity resulting in even more cornplexity as well as increased cost.
O-ther prior propulsion devices such as described in U.S. Patents 2,976,836, and 3,164,122, issued to L.J. Fageol et al, provide an exhaust directly from the engine out of the boat.
SUMMARY OF THE IN~ENTION
The invention in one broad concept provides a boat comprising a hull having a propeller drive containing cavity extending upwardly from the bottom thereof, the cavity having a hole in the top thereoE, an independently trirnmable and steerable propeller drive positioned under the hull, within the cavity, and rr~unting through the hole in the top of the cavity, the propeller drive including a lower unit, and an exhaust Elexible passageway portion connecting between -the lower unit and the cavity, the flexible passageway portion providing a closed exhaust gas passageway during steering and trimming movement of the drive.
2Q Another broad concept of the invention comprehends a boat comprising a hull including a planing surface and a transom, a propeller drive containing cavity formed within the hull and extending upwardly from -the bottom surface and forwardly of the transom, the cavity having a top with a hole formed therein for positioning trirnmable and steerable propeller drive, and a forward vertical wall, having a hole therein whereby an exhaust connector may be secured -to and seal the forward wall hole.
I'he inven-tion also comprehends a boat including a port side and a starboard side comprising a hull having a water planing bottom with a generally ver-tical transom, the bottom including a cavity formed upward therein adjacent the transom, the cavity including a first side wall along the por-t side, a second side wall along the s-tarboard side and a top, -the first and second side walls and the top of the cavi-ty fonning an opening through the transom.
The field of the present invention is an exhaust system for a boat propulsion device and more particularly concerns an exhaust system for a boat propulsion device having an engine inside a boat and a steerable and trimmable drive under a boat. -Prior boat propulsion devices which provide steering and trimming of a drive include the stern drive andthe outboard. The stern drive has an engine inside the boat and a orive at the rear of the boat. The exhaust system in the stern drive connects From the engine; to the transom mount; to an exhaust bellows under the gimbal; to an internal passageway into the lower unit; and exhausts at the rear of the lower unit.
The outboard is an unit assembly of engine and drive mounted outside the boat. The exhaust passageway is internal from the engine to the lower unit.
The exhaust systern for -these prior boa-t propulsion devices is arranged to confonn to the struc-ture of the devices.
Since these devices are complex, the exhaus-t system adds to -this complexity resulting in even more cornplexity as well as increased cost.
O-ther prior propulsion devices such as described in U.S. Patents 2,976,836, and 3,164,122, issued to L.J. Fageol et al, provide an exhaust directly from the engine out of the boat.
SUMMARY OF THE IN~ENTION
The invention in one broad concept provides a boat comprising a hull having a propeller drive containing cavity extending upwardly from the bottom thereof, the cavity having a hole in the top thereoE, an independently trirnmable and steerable propeller drive positioned under the hull, within the cavity, and rr~unting through the hole in the top of the cavity, the propeller drive including a lower unit, and an exhaust Elexible passageway portion connecting between -the lower unit and the cavity, the flexible passageway portion providing a closed exhaust gas passageway during steering and trimming movement of the drive.
2Q Another broad concept of the invention comprehends a boat comprising a hull including a planing surface and a transom, a propeller drive containing cavity formed within the hull and extending upwardly from -the bottom surface and forwardly of the transom, the cavity having a top with a hole formed therein for positioning trirnmable and steerable propeller drive, and a forward vertical wall, having a hole therein whereby an exhaust connector may be secured -to and seal the forward wall hole.
I'he inven-tion also comprehends a boat including a port side and a starboard side comprising a hull having a water planing bottom with a generally ver-tical transom, the bottom including a cavity formed upward therein adjacent the transom, the cavity including a first side wall along the por-t side, a second side wall along the s-tarboard side and a top, -the first and second side walls and the top of the cavi-ty fonning an opening through the transom.
-2-. .
1~171~5 An engine is positioned in the boa-t above the cavity with a drive which is rota-tably steerable within the cavity and trimnable within the cavity positioned within ttle cavity connecting upwardly -through a sealed opening in the top of the cavity to the engine. Exhaust passaqeway means connects between the engine and the steerable -trimmable drive, the exhaust passageway means directing the exhaus-t through the boat hull to the drive.
More partlcularly the present invention includes an exhaust system for a boat propulsion device where a portion o-E the drive is contained in a cavity under -the boat. The invention includes an exhaust passageway, connecting between an engine inside a boat and a drive having a lower unit under and extending to the rear of the boat, appropriately directing the exhaust through the boat hull to the lower uni-t. With considera-tion to the orientation oE the lower unit to a bottom surface of the boat during steering and trim/tilt rnovernent, a flexible exhaust bellows extending between the lower unit and a surface of the cavity provides a practical arrangement. This results in an exhaust system transition with rninirnal distortion during operation of the boat propulsion device. In-terfacing between a rigid exhaust pipe inside the boa-t and the flexible exhaust bellows outside the boat is a boa-t exhaust connector positioned in a vertical wall. I'he boat exhaust connector provides multiple advantages of easy boat installa-tion and convenien-t attachment of the exhaust sys-tem.
BRIEF DESCRIPTION OF''~IE DRAWINGS
F~igure 1 is a general side eleva-tion view of the boat propulsion device and boat utilizing the exhaus-t system of the invention.
-2a-~. 1,~\...
1 3 1 7 1 65 ~98~/3 Figure 2 is a back elevation view of tne boat propulslon device of the invention illustrating the lower unit exhaust passageway entrance.
Flgure 3 is a left side elevational view of the boat propUIsion aevice of Figure 2 illustrating the lower unit exhaust passageway, appearing with Figs. 1 and 5.
Figure 4 i5 a front elevation view of the boat propulsion device of the invention illustrating the lower unit exhaust passageway outlet.
Figure 5 is a cross section view on line 5-S of the boat showing the portion of the boat propulsion device exhaust system interior to the boat, appearing With Figs. 1 and 3.
Figure ~ is an enlarged fragmentary top elevation view of the flexible portion of the exhaust system of Figure 1 during steering.
Figure 7 is an enlarged fragmentary side elevation view of the flexible portion of the exhaust system of Figure 1 during trimming.
DETA!LED DESCRIFTIDN OF THE PREFERRED EM~DDIMENT
L-Drive A boat propulsion device or L-Drive 10 is shown mounted on a water craft or boat 11 in Figures 1 through 4.
The boat propulsion device 10 includes an engine 12, a mounting assembly 13 and a drive 14.
The engine 12 may be either a 2 or 4 cycle internal combustion type. In the preferred embodiment an eighty five horsepower engine as used on the US Marine Force outboard is used. For increased horsepower, the one hundred twenty five horsepower engine as used on the US Marine Force outboard may be used.
The drive 10 includes a steering assembly 15, a trimming assembly 1~ with a trim adjusting system 17, a 1 3 1 7 1 6 5 , 98b/3 propeller drive lo~er unit 18 a lower unit adapter 1~ and a drive transmission means (not shown). The drive 14 rotates from side-to-side about a vertical axis 20 in the mountlng assembly 13 to steer and pivots up-and-oown about a horizontal axis 21 to trim/tilt.
The steering assembly 15 includes a steering member Z2 and a steering arm 23 for rotating the steering member 22 to steer the boat 11.
The trimming assembly includes a trunnion 24 on 0 the lower unit adapter lq which pivotally mounts the adapter 19 to the steering member Z2 at horizontal trunnion pivot 25. The trimming assembly 1~ also utilizes a trim adjusting 5ystem 17 which includes a hydraulic trim cylinder 2~
connected between a cylinder upper pivot 27 on the steering member and a cylinder lower pivot 23 on the lower unit 18 3peration of the hydraulic trim cylinder 2~ pivots the drive 14 up-and-down for trim/tilt.
The lower unit 18 includes the propeller 29~ an anticavitation plate 30 and 2 trim fin 31 under the anticavitation plate 30. The lower unit 18 is of known construction used in an outboard. The preferred lower unit is an eighty-five horsepower lower unit used in the Force Outboard manufactured by US Marine Corporation. The alternative lower unit is an one hundred twenty five horsepower lower unit used .n the Force Outboard.
The lower unit adapter 19 mounts to the top of the lower unit 18 to detachably interface or adapt from the lower unit 18 to the trimming assembly l~ at the trunnion pivot 25.
The 30at The boat 11 includes a planing hull 32 and a generally vertical upright transom 33. The hull 32 includes a bottom planing surface 34 and a cavity 35 adjacent the 131716~ ~98~/3 transom 33. The cavity 35 extends upwardly into the hull 32 and nas an open end extending through a notch 3~ in the transom 33.
The caviey 35 includes a first portside wall 37 a second starooard side 38 wall and a third forward wall 39.
The forward wall 39 is preferably vertically upright similar to the transom 33. The forward wall 39 is positioned as far rearward as possible against the drive 14 to provide the maximum hull planing surface 34 forward of the drive 14. A
hole 40 is formed in the top 41 of the cavity 35 to accommodate the drive mounting assembly 13.
The Exhaust System The lower unit 18 includes an eKhaust outlet 42 under the anticavitation plate 30 within the trim fin 31.
This known exhaust outlet position is believed to project Ihe exhaust gases reardwardly from the boat into the water.
~n upward open chamber 43 within the lower unit 18 supplies the exhaust gases to the exhaust outlet 42.
~ lower unit adapter 19 which detachably mounts on the lower unit 18 a5 previously described provides exhaust connection to the exhaust outlet 4Z. The lower unit adapter 19 forms a cover over the lower unit 18 matching with the upward open chamber 43 and includes a rigid curved exhaust pipe 44 forming a connecting adapter passageway 45 to pass exhaust gases to the chamber 43.
The rigid curved exhaust pipe 44 is curved around the adapter trunnion 24 of the trimming assembly 1~. The curved exhaust pipe 44 connects at the rearward end to the chamber 43 and at the forward end has a connecting end 4 having an exhaust outlet 42 in the trim fin 31 and the forward end is at about the forward end of the lower unit 18. In other words the lower unit 18 with adapter 19 contains a closed exhaust passageway between the rearward exhaust gas outlet 42 and the forward exhaust gas inlet 47.
1 3 1 7 1 6 5 ! 986/3 T~e engine exhaust system 48 includes an engine exhaust pipe 49 connectjng from the engine 12 to a surface in the forwa~ vertical wall 89 as close as possible to the forward exhaust oas Inlet 47 of the curved exhaust plDe 44.
~he vertical forward wall 39 has an opening or exhaust cutout 50 therejn and an exhaust pipe connector 51 is sealably mounted in the cutout 50. The exhaust pipe connector 50 includes a connector housing 52 having a mounting flange 53 which sealably mounts to the sides adjacent the exhaust cutout hole 50, an inside connector portion 54 and an outside connector portion 55.
The connector housing 52 which e~tends through the exhaust cutout 50 into the boat 11 as shown in Figure 5 through 7 provides added space within the rearward positioned forwaro wall 3q to connect with the outside connector portion 55.
The engine exhaust pipe 4q connects to the inside connector portion 54. The engine exhaust pipe 4q is preferred rigid although flexible pipe portions may be used.
~ flexible exhaust pipe, which is preferably a flexible exhaust bellows 5~, connects between the outside connector portion 55 and the curved exhaust pipe connecting end 4~. The exhaust bellows 5~ is a tubular or hollow member formed of an exhaust gas resisting material which generally maintains a non collapsed shape during flexing.
The exhaust bellows 5b extends between the outside connector portion 55 in the forward wall ~q and the forward end of the lower unit 18. The forward end of the exhaust bellows 56 actually extends into the connector housing 52.
This permits the use of a longer exhaust bellows 56 while retaining a shorter space between the lower unit 18 and the forward wall ~7.
~ s shown in Figure ~, the lower unit end of the exhaust bellows 56 swings from side-to-side with steering of -h-1317165 198~/3 the r~rive 14. ~s s~own in Figure 7, the exhaust ~ellows 5~swings fro~ up-to-dDwn during trim/tilt. The positioning o~ the exhaust bellows 5~ as descri~ed provides gradual curve transition within the ex~aust passageway formed therein between the lower unit 18 and the boat 11 during steering and trim/tilt, provi~es for long flexing life and provides exhaust ascetic5 5ince the exhaust ~ellows is not easily seen under the coat 11.
1~171~5 An engine is positioned in the boa-t above the cavity with a drive which is rota-tably steerable within the cavity and trimnable within the cavity positioned within ttle cavity connecting upwardly -through a sealed opening in the top of the cavity to the engine. Exhaust passaqeway means connects between the engine and the steerable -trimmable drive, the exhaust passageway means directing the exhaus-t through the boat hull to the drive.
More partlcularly the present invention includes an exhaust system for a boat propulsion device where a portion o-E the drive is contained in a cavity under -the boat. The invention includes an exhaust passageway, connecting between an engine inside a boat and a drive having a lower unit under and extending to the rear of the boat, appropriately directing the exhaust through the boat hull to the lower uni-t. With considera-tion to the orientation oE the lower unit to a bottom surface of the boat during steering and trim/tilt rnovernent, a flexible exhaust bellows extending between the lower unit and a surface of the cavity provides a practical arrangement. This results in an exhaust system transition with rninirnal distortion during operation of the boat propulsion device. In-terfacing between a rigid exhaust pipe inside the boa-t and the flexible exhaust bellows outside the boat is a boa-t exhaust connector positioned in a vertical wall. I'he boat exhaust connector provides multiple advantages of easy boat installa-tion and convenien-t attachment of the exhaust sys-tem.
BRIEF DESCRIPTION OF''~IE DRAWINGS
F~igure 1 is a general side eleva-tion view of the boat propulsion device and boat utilizing the exhaus-t system of the invention.
-2a-~. 1,~\...
1 3 1 7 1 65 ~98~/3 Figure 2 is a back elevation view of tne boat propulslon device of the invention illustrating the lower unit exhaust passageway entrance.
Flgure 3 is a left side elevational view of the boat propUIsion aevice of Figure 2 illustrating the lower unit exhaust passageway, appearing with Figs. 1 and 5.
Figure 4 i5 a front elevation view of the boat propulsion device of the invention illustrating the lower unit exhaust passageway outlet.
Figure 5 is a cross section view on line 5-S of the boat showing the portion of the boat propulsion device exhaust system interior to the boat, appearing With Figs. 1 and 3.
Figure ~ is an enlarged fragmentary top elevation view of the flexible portion of the exhaust system of Figure 1 during steering.
Figure 7 is an enlarged fragmentary side elevation view of the flexible portion of the exhaust system of Figure 1 during trimming.
DETA!LED DESCRIFTIDN OF THE PREFERRED EM~DDIMENT
L-Drive A boat propulsion device or L-Drive 10 is shown mounted on a water craft or boat 11 in Figures 1 through 4.
The boat propulsion device 10 includes an engine 12, a mounting assembly 13 and a drive 14.
The engine 12 may be either a 2 or 4 cycle internal combustion type. In the preferred embodiment an eighty five horsepower engine as used on the US Marine Force outboard is used. For increased horsepower, the one hundred twenty five horsepower engine as used on the US Marine Force outboard may be used.
The drive 10 includes a steering assembly 15, a trimming assembly 1~ with a trim adjusting system 17, a 1 3 1 7 1 6 5 , 98b/3 propeller drive lo~er unit 18 a lower unit adapter 1~ and a drive transmission means (not shown). The drive 14 rotates from side-to-side about a vertical axis 20 in the mountlng assembly 13 to steer and pivots up-and-oown about a horizontal axis 21 to trim/tilt.
The steering assembly 15 includes a steering member Z2 and a steering arm 23 for rotating the steering member 22 to steer the boat 11.
The trimming assembly includes a trunnion 24 on 0 the lower unit adapter lq which pivotally mounts the adapter 19 to the steering member Z2 at horizontal trunnion pivot 25. The trimming assembly 1~ also utilizes a trim adjusting 5ystem 17 which includes a hydraulic trim cylinder 2~
connected between a cylinder upper pivot 27 on the steering member and a cylinder lower pivot 23 on the lower unit 18 3peration of the hydraulic trim cylinder 2~ pivots the drive 14 up-and-down for trim/tilt.
The lower unit 18 includes the propeller 29~ an anticavitation plate 30 and 2 trim fin 31 under the anticavitation plate 30. The lower unit 18 is of known construction used in an outboard. The preferred lower unit is an eighty-five horsepower lower unit used in the Force Outboard manufactured by US Marine Corporation. The alternative lower unit is an one hundred twenty five horsepower lower unit used .n the Force Outboard.
The lower unit adapter 19 mounts to the top of the lower unit 18 to detachably interface or adapt from the lower unit 18 to the trimming assembly l~ at the trunnion pivot 25.
The 30at The boat 11 includes a planing hull 32 and a generally vertical upright transom 33. The hull 32 includes a bottom planing surface 34 and a cavity 35 adjacent the 131716~ ~98~/3 transom 33. The cavity 35 extends upwardly into the hull 32 and nas an open end extending through a notch 3~ in the transom 33.
The caviey 35 includes a first portside wall 37 a second starooard side 38 wall and a third forward wall 39.
The forward wall 39 is preferably vertically upright similar to the transom 33. The forward wall 39 is positioned as far rearward as possible against the drive 14 to provide the maximum hull planing surface 34 forward of the drive 14. A
hole 40 is formed in the top 41 of the cavity 35 to accommodate the drive mounting assembly 13.
The Exhaust System The lower unit 18 includes an eKhaust outlet 42 under the anticavitation plate 30 within the trim fin 31.
This known exhaust outlet position is believed to project Ihe exhaust gases reardwardly from the boat into the water.
~n upward open chamber 43 within the lower unit 18 supplies the exhaust gases to the exhaust outlet 42.
~ lower unit adapter 19 which detachably mounts on the lower unit 18 a5 previously described provides exhaust connection to the exhaust outlet 4Z. The lower unit adapter 19 forms a cover over the lower unit 18 matching with the upward open chamber 43 and includes a rigid curved exhaust pipe 44 forming a connecting adapter passageway 45 to pass exhaust gases to the chamber 43.
The rigid curved exhaust pipe 44 is curved around the adapter trunnion 24 of the trimming assembly 1~. The curved exhaust pipe 44 connects at the rearward end to the chamber 43 and at the forward end has a connecting end 4 having an exhaust outlet 42 in the trim fin 31 and the forward end is at about the forward end of the lower unit 18. In other words the lower unit 18 with adapter 19 contains a closed exhaust passageway between the rearward exhaust gas outlet 42 and the forward exhaust gas inlet 47.
1 3 1 7 1 6 5 ! 986/3 T~e engine exhaust system 48 includes an engine exhaust pipe 49 connectjng from the engine 12 to a surface in the forwa~ vertical wall 89 as close as possible to the forward exhaust oas Inlet 47 of the curved exhaust plDe 44.
~he vertical forward wall 39 has an opening or exhaust cutout 50 therejn and an exhaust pipe connector 51 is sealably mounted in the cutout 50. The exhaust pipe connector 50 includes a connector housing 52 having a mounting flange 53 which sealably mounts to the sides adjacent the exhaust cutout hole 50, an inside connector portion 54 and an outside connector portion 55.
The connector housing 52 which e~tends through the exhaust cutout 50 into the boat 11 as shown in Figure 5 through 7 provides added space within the rearward positioned forwaro wall 3q to connect with the outside connector portion 55.
The engine exhaust pipe 4q connects to the inside connector portion 54. The engine exhaust pipe 4q is preferred rigid although flexible pipe portions may be used.
~ flexible exhaust pipe, which is preferably a flexible exhaust bellows 5~, connects between the outside connector portion 55 and the curved exhaust pipe connecting end 4~. The exhaust bellows 5~ is a tubular or hollow member formed of an exhaust gas resisting material which generally maintains a non collapsed shape during flexing.
The exhaust bellows 5b extends between the outside connector portion 55 in the forward wall ~q and the forward end of the lower unit 18. The forward end of the exhaust bellows 56 actually extends into the connector housing 52.
This permits the use of a longer exhaust bellows 56 while retaining a shorter space between the lower unit 18 and the forward wall ~7.
~ s shown in Figure ~, the lower unit end of the exhaust bellows 56 swings from side-to-side with steering of -h-1317165 198~/3 the r~rive 14. ~s s~own in Figure 7, the exhaust ~ellows 5~swings fro~ up-to-dDwn during trim/tilt. The positioning o~ the exhaust bellows 5~ as descri~ed provides gradual curve transition within the ex~aust passageway formed therein between the lower unit 18 and the boat 11 during steering and trim/tilt, provi~es for long flexing life and provides exhaust ascetic5 5ince the exhaust ~ellows is not easily seen under the coat 11.
Claims (17)
1. A propulsion device for a boat comprising a mounting assembly for attachment of the propulsion device through a generally horizontal bottom surface of the boa-t, an engine positioned inside the boat, a propeller drive positioned under said generally horizontal bottom surface of the boat, said drive drivable coupled to said engine through said mounting assembly, said drive including a lower unit having an exhaust passageway there through between an inlet and an outlet, a steering assembly for connecting said drive to said mounting assembly, said steering assembly constructed to rotate about a generally vertical axis within said mounting assembly, a trimming assembly for connecting said drive to said steering assembly for providing a limited range of horizontal swinging movement therefrom, and an exhaust passageway means including a flexible portion connecting between said engine and said drive, said flexible portion providing exhaust connection during steering and trimming of said propeller drive.
2. The propulsion device defined in claim 1 wherein said lower unit includes an anticavitation plate and said outlet is under said anticavitation plate to project exhaust gases reardwardly from said boat.
3. The propulsion device defined in claim 1 wherein said lower unit exhaust passageway includes a portion passing around said steering and trimming assembly, said entrance in said lower unit facing forwardly of the boat.
4. The propulsion device defined in claim I
wherein said flexible portion of said exhaust passageway means extends at least between said lower unit and a bottom surface of said boat, said exhaust passageway means including a sealing portion at said bottom surface of said boat.
wherein said flexible portion of said exhaust passageway means extends at least between said lower unit and a bottom surface of said boat, said exhaust passageway means including a sealing portion at said bottom surface of said boat.
5. The propuision device defined in claim 4 wherein said sealing portion is an exhaust connector sealed through a hole in a bottom surface of the boat.
6. A boat comprising a hull having a propeller drive containing cavity extending upwardly from the bottom thereof, said cavity having a hole in the top thereof, an independently trimmable and steerable propeller drive positioned under said hull, within said cavity, and mounting through said hole in the top of said cavity, said propeller drive including a lower unit, and an exhaust flexible passageway portion connecting between said lower unit and said cavity, said flexible passageway portion providing a closed exhaust gas passageway during steering and trimming movement of said drive.
7. The boat defined in claim 6 wherein said cavity contains an exhaust connector extending into the boat, said flexible passageway portion connecting between said lower unit and said exhaust connector.
8. The boat defined in claim 7 wherein said cavity contains a forward generally vertical wall, said flexible passageway portion being positioned therethrough.
9. A boat comprising a hull including a bottom planing surface and a transom, a propeller drive containing cavity formed within said hull and extending upwardly from -the bottom surface and forwardly of the transom, said cavity having a top with a hole formed therein for positioning trimmable and steerable propeller drive, and a forward vertical wall, having a hole therein whereby an exhaust connector may be secured to and seal said forward wall hole.
10 A boat including a port side and a starboard side comprising a hull having a water planing bottom with a generally vertical transom, said bottom including a cavity formed upward therein adjacent said transom, said cavity including a first side wall along said port side, a second side wall along said starboard side and a top, said first and second side walls and said top of said cavity forming an opening through said transom, an engine positioned in the boat above said cavity, a drive which is rotatably steerable within said cavity and trimmable within said cavity positioned within said cavity connecting upwardly -through a sealed opening in the top of said cavity to said engine, and exhaust passageway means connecting between said engine and said steerable trimmable drive, said exhaust passageway means directing the exhaust through -the boat hull to the drive.
11. The boat defined in claim 10 wherein said drive includes a lower unit having a lower unit exhaust passageway means therethrough between an inlet and an outlet, said exhaust passageway means connecting between said engine and said inlet in said lower unit.
12. The boat defined in claim 10 wherein said exhaust passageway means includes a flexible exhaust passageway means within said cavity.
13. A boat having a hull with a water planing bottom, a rearward transom extending upwardly from the water planing bottom and a forward bow, said boat comprising a cavity indented upwardly into the hull and extending from the -transom towards the bow, said cavity forming a compartment in the hull under the boa-t and opening to the rear of the boat through a downward notch in the transom, said cavity having a top raised above the water planing bottom, said cavity top including opening means therein whereby said canpartment is adapted to provide umder-the-hull containment of a downward and rearward portion of a boat propulsion device with the downward portion including a portion extending through said top opening means into said boat and the rearward portion extending rearwardly of the boat through the notch in the transom, an engine positioned in the boat above said cavity, a drive which is rotatably steerable within said cavity and trimmable within said cavity positioned within said cavity connecting upwardly through said opening means in the top of said cavity to said engine, and exhaust passageway means connecting between said engine and said steerable trimmable drive, said exhaust passageway means including an exhaust passageway portion within said boat connecting through said hull with a flexible exhaust passageway portion within said cavity.
14. A boat and boat propulsion device conibination comprising a hull with a water planing bottom, a cavity formed upwardly within said hull, said cavity including a top or raised bottom surface within said hull, said cavity creating a compartment under said hull. raised above said water planing surface for containment of a portion of a boat propulsion device, said portion of said boat propulsion device contained within said cavity including a lower unit exhaust passageway means therein extending into said cavity, and a portion of said boat propulsion device contained within said boat above said cavity, said portion within said boat including an engine having an engine exhaust passageway means extending therefrom through said hull into said cavity and connecting with the exhaust passageway means within said cavity.
15. The combination defined in claim 14 wherein said lower unit exhaust passageway means includes a flexible exhaust passageway means within said cavity whereby said lower unit can steer and trim while providing passage of exhaust gases therethrough.
16. An exhaust system for a boat propulsion device and boat combination comprising exhaust passageway means connecting between an engine and a steerable trimmable lower unit, said exhaust passageway means passing through the hull of the boat and including an exhaust passageway portion within a cavity under said boat connecting with an internal exhaust passageway portion within said lower unit, said cavity creating a compartment under said hull raised above said water planing surface and notched through said transom for containment of said steerable and trimmable lower unit of said boat propulsion device.
17. The exhaust system defined in claim 16 further comprising a flexible exhaust passageway means within said cavity whereby said flexible exhaust passageway means permits said lower unit to steer and trim while at the same time providing passage of exhaust gases therethrough.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US6222787A | 1987-06-15 | 1987-06-15 | |
| US07/062,227 | 1987-06-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1317165C true CA1317165C (en) | 1993-05-04 |
Family
ID=22041040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000567972A Expired - Fee Related CA1317165C (en) | 1987-06-15 | 1988-05-27 | Exhaust system for a boat propulsion device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0194096A (en) |
| CA (1) | CA1317165C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9475560B1 (en) | 2015-03-05 | 2016-10-25 | Brunswick Corporation | Outboard motor and midsection assembly for outboard motor |
| US11661163B1 (en) | 2018-10-26 | 2023-05-30 | Brunswick Corporation | Outboard motors having steerable lower gearcase |
| US12304607B1 (en) | 2018-10-26 | 2025-05-20 | Brunswick Corporation | Marine drives having steerable gearcase |
| US12304609B2 (en) | 2022-03-28 | 2025-05-20 | Brunswick Corporation | Stern drives and transom bracket assemblies for stern drives providing vibration isolation |
| US12539952B2 (en) | 2022-03-28 | 2026-02-03 | Brunswick Corporation | Marine drives having hydraulically actuated steerable gearcase |
| US12545391B2 (en) | 2023-03-20 | 2026-02-10 | Brunswick Corporation | Stern drives and noise-vibration-harshness dampening assemblies for a stern drives |
-
1988
- 1988-05-27 CA CA000567972A patent/CA1317165C/en not_active Expired - Fee Related
- 1988-06-14 JP JP63146679A patent/JPH0194096A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9475560B1 (en) | 2015-03-05 | 2016-10-25 | Brunswick Corporation | Outboard motor and midsection assembly for outboard motor |
| US11661163B1 (en) | 2018-10-26 | 2023-05-30 | Brunswick Corporation | Outboard motors having steerable lower gearcase |
| US11964746B1 (en) | 2018-10-26 | 2024-04-23 | Brunswick Corporation | Outboard motors having steerable lower gearcase |
| US12304607B1 (en) | 2018-10-26 | 2025-05-20 | Brunswick Corporation | Marine drives having steerable gearcase |
| US12304609B2 (en) | 2022-03-28 | 2025-05-20 | Brunswick Corporation | Stern drives and transom bracket assemblies for stern drives providing vibration isolation |
| US12539952B2 (en) | 2022-03-28 | 2026-02-03 | Brunswick Corporation | Marine drives having hydraulically actuated steerable gearcase |
| US12545391B2 (en) | 2023-03-20 | 2026-02-10 | Brunswick Corporation | Stern drives and noise-vibration-harshness dampening assemblies for a stern drives |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0194096A (en) | 1989-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3452704A (en) | Engine mounted on a gimbal-like frame | |
| CA1186566A (en) | Outboard motor mounting arrangement | |
| US4395238A (en) | Outboard motor mounting means affording upward tilting without travel of the motor forwardly of the boat transom | |
| US5108325A (en) | Boat propulsion device | |
| US5326294A (en) | Stern drive for boats | |
| US3241511A (en) | Boat hulls, motor-propeller units and hydrofoil combinations | |
| JPH02290794A (en) | Marine propulsion device with fitting means disposed rearward of after-rib of hull | |
| CA1176917A (en) | Arrangement for supplying air, fuel, power and control cables to a marine propulsion unit | |
| CA1312504C (en) | L-drive | |
| US4355986A (en) | Outboard motor with elevated horizontal pivot axis | |
| US4911666A (en) | Boat propulsion device with internal exhaust | |
| US6468119B1 (en) | Composite stern drive assembly | |
| CA1317165C (en) | Exhaust system for a boat propulsion device | |
| US5472361A (en) | Marine propulsion unit | |
| US4635582A (en) | Apparatus for preventing a capsized boat from sinking | |
| US6468120B1 (en) | Single cylinder trim/tilt assembly | |
| JP4283627B2 (en) | Outboard motor | |
| US4623313A (en) | Pivotal air induction for marine propulsion device | |
| JPH03139496A (en) | Ship propulsion machinery | |
| US4642058A (en) | Hydraulic system for marine propulsion devices | |
| JP4828846B2 (en) | Outboard motor | |
| SE8804600D0 (en) | EXHAUST SYSTEM FOR MARINE DRIVES | |
| CA1317166C (en) | Boat propulsion device | |
| JP2710060B2 (en) | Outboard motor | |
| JP4640885B2 (en) | Jet-propelled planing boat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |