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US3610198A - Outboard motor shroud - Google Patents

Outboard motor shroud Download PDF

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Publication number
US3610198A
US3610198A US851328A US3610198DA US3610198A US 3610198 A US3610198 A US 3610198A US 851328 A US851328 A US 851328A US 3610198D A US3610198D A US 3610198DA US 3610198 A US3610198 A US 3610198A
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United States
Prior art keywords
passage
inlet throat
shroud
wall means
rearwardly
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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 - Lifetime
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US851328A
Inventor
Norman J Alexandrowicz
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Outboard Marine Corp
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Outboard Marine Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/165—Marine vessels; Ships; Boats
    • F02M35/167—Marine vessels; Ships; Boats having outboard engines; Jet-skis
    • F02M35/168—Marine vessels; Ships; Boats having outboard engines; Jet-skis with means, e.g. valves, to prevent water entry
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
    • F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10013—Means upstream of the air filter; Connection to the ambient air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10262—Flow guides, obstructions, deflectors or the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • a shroud for the engine or power head of a marine propulsion device which shroud has a rearwardly sloping channel provided with an upstanding annular flange defining an air inlet throat.
  • a cover located over a recessed wall portion and spaced from the inlet throat cooperates with the channel to define a passage which is open both forwardly and rearwardly for supplying air to the inlet throat.
  • An intermediate apertured partition separates the passage into upper and lower passage portions.
  • the apertures in the partition permit air to communicate from the lower passage portion to the upper passage, but prevent spray and rain from entering the inlet throat.
  • a rearwardly sloping wall in the channel affords rearward drainage of water through the lower passage portion,
  • the rear edge of the cover is provided with an enlarged smooth, arcuate edge which forms a grip or handle for tilting the propulsion unit.
  • the invention provides a shroud for enclosing the power head of a marine propulsion device.
  • the shroud is provided with a passage to supply air to the engine carburetor and a rearwardly located handle to facilitate tilting of the propulsion device about a tilt axis.
  • the shroud includes an upwardly open and rearwardly sloping channel with an upstanding inlet throat in the channel which communicates with the engine carburetor.
  • the shroud further includes wall means in the form of a cover which encloses the channel and is spaced above the air inlet throat.
  • the cover cooperates with the rearwardly sloping channel to define a passage which has a forwardly and upwardly located opening and a rearwardly located opening.
  • the rear edge of the cover is provided with an enlarged smooth, arcuate edge which, in part, defines the rearward opening, and forms a grip or handle for tilting the propulsion unit.
  • the rearwardly located opening permits the entry of fingers to facilitate gripping the handle.
  • a partition located intermediate the cover and a rearwardly sloping wall in the channel separates the passage into upper and lower passage portions.
  • the partition prevents rain and spray from entering the inlet throat. Apertures in the partition permit air to flow from the lower passage to the upper passage.
  • the rearwardly sloping wall in the lower passage portion affords rearward drainage of water.
  • It is a further object of the invention to provide a shroud for a marine propulsion device which includes a passage which is open both, forwardly and rearwardly for supplying air to the engine carburetor, which rearwardly open passage assists in providing a rearwardly located handle to facilitate tilting movement of the propulsion device about a tilt axis.
  • FIG. 1 is a side elevational view of a marine propulsion device embodying the shroud of the invention
  • FIG. 2 is a rear view of the marine propulsion device shown in FIG. 1.
  • FIG. 3 is an enlarged fragmentary sectional view of the shroud shown in FIG. 1.
  • FIG. 4 is an enlarged plane view with portions broken away of the shroud shown in FIGS. 1 and 3.
  • FIG. 5 is a sectional view taken along line 5-5 of FIG. 4.
  • FIG. I shows a marine propulsion device which is generally designated [0, and which includes a shroud I2 which encloses the engine power head 13.
  • the shroud I2 includes first wall means which define a rearwardly sloping upwardly open channel.
  • the first wall means include a rearwardly sloping floor or wall I4 (FIGS. I and 3) and upstanding walls 16 and 18 which extend upwardly from wall I4 and merge with a laterally outwardly extending upper surface or wall (FIGS. 2 and 5).
  • the walls 14, I6 and I8 define a channel 21.
  • the shroud 12 also includes means defining an upstanding inlet throat or duct 22 (FIG. 3). As disclosed, such means is in the form of an annular flange 24 which projects upwardly from the channel floor 14 to define an upper opening 26. The annular flange also defines a lower opening 28 which communicates with the interior 27 of the shroud 12 to supply air to the engine carburetors.
  • the invention also includes second wall means on said shroud which cooperate with the first wall means to define a passage around the inlet throat 22 and to cover the upper opening 26.
  • the second wall means includes an upper wall portion or cover 29 which is provided with downturned flanges 30 and 32 (FIG. 5) which are located inwardly of the wall portions 16 and I8, and interfit with the wall portions 16 and 18 to form a passage which is generally designated 34 and which is open at both its forward and rearward ends.
  • the forward end 36 of the cover 29 (FIGS. 3 and 4) is spaced from the wall portion I4 to provide a forwardly located passage opening 38.
  • the rearward edge 40 of the wall or cover 29 defines, in part, a rearwardly located passage opening 44 and is provided with an enlarged smooth wall portion 42 which forms a grip or handle for tilting the propulsion device.
  • the spacing of the wall portion 42 from the wall portion 14 provides the rearwardly located passage opening 44 and also permits entry of fingers to facilitate gripping of the handle or wall portion 42.
  • the invention includes third wall means.
  • the third wall means is in the form of an intermediate partition 46 which spans the distance between the downturned flanges 30 and 32 (FIG. 5) and extends forwardly from the handle 42 to a point spaced from the forward opening 38.
  • the partition 46 includes a forwardly located upturned portion 50 which is in abutting engagement with a downturned flange 52 on the cover 29.
  • the partition 46 can be located either above the upper end of the annular flange 24 or can fit around the annular flange below the upper edge thereof. In the disclosed construction, the partition is located above the upper edge 54 of the annular flange 24 (FIG. 3) and separated from the upper flange edge 54 by a seal or gasket 56 which minimizes vibration of the partition 46.
  • the partition 46 is secured to the cover 29 by bolts 58 which extend through apertures in the partition and are threadably received in bosses 60 which depend from the cover 29.
  • the cover 29 can be secured to the wall 14 by bolts 62 which extend through apertures in wall 14 and are threadably received in bosses 64 (FIG. 3) which depend from the cover 29 and extend through the partition 46.
  • the partition 46 separates the passage 34 into upper and lower passage portions, respectively 66 and 68, and is provided with an aperture 69 located over the opening 26 in the inlet throat 22 to afford communication between the upper passage portion 66 with the inlet throat 22.
  • a plurality of apertures 70 in the partition 46 afford communication of air entering the lower passage portion 68 with the upper passage portion 66 and, hence, with the inlet throat 22.
  • the rearwardly sloping wall 14 provides rearward drainage of water through the passage opening 44.
  • the upstanding flange 24 and the partition 46 prevent entry of water into the inlet throat 22.
  • a marine propulsion device comprising an engine shroud, first wall means on said shroud for defining a rearwardly sloping upwardly open channel, means defining an inlet throat in said channel upstanding from said first wall means and including an upper opening, said inlet throat being adapted to communicate with the engine carburetor, second wall means on said shroud cooperating with said first wall means to define a passage around said inlet throat and to cover said upper opening, said passage having forward and rearward openings located on opposite sides of said throat to supply air to said inlet throat.
  • a marine propulsion device in accordance with claim 1 including third wall means for defining a partition located within said passage, said third wall means cooperating with said first and second wall means to define upper and lower passage portions, said upper passage being in communication with said inlet throat, said lower passage portion affording rearward drainage of water entering said forwardly located passage opening, and apertures in said partition to afford airflow from said lower passage to said upper passage for flow to said inlet throat.
  • a shroud for a marine propulsion device comprising wall portions defining an upwardly open channel having a rearwardly sloping floor, an inlet throat extending upwardly from said channel floor, a cover over said channel and said inlet throat, said cover cooperating with said channel to provide a passage for supplying air to said inlet throat, said passage extending in opposite directions from said throat and having openings located forwardly and rearwardly with respect to said throat.
  • a marine propulsion device comprising an engine shroud, first wall means on said shroud for defining a rearwardly sloping upwardly open channel, means defining an inlet throat in said channel upstanding from said first wall means and including an upperopening, said inlet throat being adapted to communicate with the engine carburetor, second wall means on said shroud cooperating with said first wall means to define a passage around said inlet throat and to cover said upper opening, said passage having forwardly and rearwardly located openings to supply air to said inlet throat, said second wall means also defining a rearwardly located handle adjacent said rearward passage opening for tilting the propulsion unit about a tilt axis, and third wall means defining a partition cooperating with said first and second wall means to define upper and lower passage portions, said upper passage portion being in communication with said inlet throat, said lower passage portion affording rearward drainage of water entering said forwardly located passage opening, and apertures in said partition to afford airflow from said lower passage to said upper passage for flow to said inlet throat.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

Disclosed herein is a shroud for the engine or power head of a marine propulsion device, which shroud has a rearwardly sloping channel provided with an upstanding annular flange defining an air inlet throat. A cover located over a recessed wall portion and spaced from the inlet throat cooperates with the channel to define a passage which is open both forwardly and rearwardly for supplying air to the inlet throat. An intermediate apertured partition separates the passage into upper and lower passage portions. The apertures in the partition permit air to communicate from the lower passage portion to the upper passage, but prevent spray and rain from entering the inlet throat. A rearwardly sloping wall in the channel affords rearward drainage of water through the lower passage portion. The rear edge of the cover is provided with an enlarged smooth, arcuate edge which forms a grip or handle for tilting the propulsion unit.

Description

United States Patent [72] lnventor Norman J. Alexandrowicz Waukegan, Ill. [21] Appl. No. 851,328 [22] Filed Aug. 19, 1969 [45] Patented Oct. 5, 1971 [73] Assignee Outboard Marine Corporation Waukegan, Ill.
[54] OUTBOARD MOTOR SHROUD 6 Claims, 5 Drawing Figs.
[52] US. Cl 115/17, 7 123/195 [51] Int. Cl B63h 21/26 [50] Field of Search... 115/17; 123/198 E, 195 P, 195.0; 180/69, 69.1, 69.01
[56] References Cited UNITED STATES PATENTS 2,224,900 12/1940 Conover 123/195 P 2,834,419 5/1958 Sebok 180/69 R Primary Examiner-Milton Buchler Assistant ExaminerGregory W. OConnor Att0rneysRobert E. Clemency, John W. Michael, Robert K.
Gerling, Gerrit D. Foster, Bayard H. Michael, Paul R. Puerner, Joseph A. Gemignani and Andrew 0. Riteris ABSTRACT: Disclosed herein is a shroud for the engine or power head of a marine propulsion device, which shroud has a rearwardly sloping channel provided with an upstanding annular flange defining an air inlet throat. A cover located over a recessed wall portion and spaced from the inlet throat cooperates with the channel to define a passage which is open both forwardly and rearwardly for supplying air to the inlet throat. An intermediate apertured partition separates the passage into upper and lower passage portions. The apertures in the partition permit air to communicate from the lower passage portion to the upper passage, but prevent spray and rain from entering the inlet throat. A rearwardly sloping wall in the channel affords rearward drainage of water through the lower passage portion, The rear edge of the cover is provided with an enlarged smooth, arcuate edge which forms a grip or handle for tilting the propulsion unit.
PATENTED mm 5197: 3,610,198
Worm flezana mw'gg 20M 10% MM M OUTBOARD MOTOR SHROUD SUMMARY OF THE INVENTION The invention provides a shroud for enclosing the power head of a marine propulsion device. The shroud is provided with a passage to supply air to the engine carburetor and a rearwardly located handle to facilitate tilting of the propulsion device about a tilt axis.
More specifically, the shroud includes an upwardly open and rearwardly sloping channel with an upstanding inlet throat in the channel which communicates with the engine carburetor. The shroud further includes wall means in the form of a cover which encloses the channel and is spaced above the air inlet throat. The cover cooperates with the rearwardly sloping channel to define a passage which has a forwardly and upwardly located opening and a rearwardly located opening. The rear edge of the cover is provided with an enlarged smooth, arcuate edge which, in part, defines the rearward opening, and forms a grip or handle for tilting the propulsion unit. The rearwardly located opening permits the entry of fingers to facilitate gripping the handle.
A partition located intermediate the cover and a rearwardly sloping wall in the channel separates the passage into upper and lower passage portions. The partition prevents rain and spray from entering the inlet throat. Apertures in the partition permit air to flow from the lower passage to the upper passage. The rearwardly sloping wall in the lower passage portion affords rearward drainage of water.
It is an object of the invention to provide a shroud for the power head or engine of a marine propulsion device, which shroud is provided with an upwardly and forwardly open air inlet passage for supplying air to the engine carburetor, said pasage being defined, in part, by a rearwardly sloping wall portion which afiords rearward drainage of water entering the passage.
It is a further object of the invention to provide a shroud for a marine propulsion device which includes a passage which is open both, forwardly and rearwardly for supplying air to the engine carburetor, which rearwardly open passage assists in providing a rearwardly located handle to facilitate tilting movement of the propulsion device about a tilt axis.
It is a further object of the invention to provide a shroud for the power head of a marine propulsion device, which shroud has a forwardly and upwardly located opening for supplying air to the engine carburetor and which includes a rearwardly sloping wall portion with an upstanding air inlet throat to afford rearward drainage of water entering the opening and to prevent entry of water into the carburetor.
Further objects and advantages of the invention will become apparent from the following description and accompanying drawings.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevational view of a marine propulsion device embodying the shroud of the invention,
FIG. 2 is a rear view of the marine propulsion device shown in FIG. 1.
FIG. 3 is an enlarged fragmentary sectional view of the shroud shown in FIG. 1.
FIG. 4 is an enlarged plane view with portions broken away of the shroud shown in FIGS. 1 and 3.
FIG. 5 is a sectional view taken along line 5-5 of FIG. 4.
DETAILED DESCRIPTION In the drawings, FIG. I shows a marine propulsion device which is generally designated [0, and which includes a shroud I2 which encloses the engine power head 13. In accordance with the invention, the shroud I2 includes first wall means which define a rearwardly sloping upwardly open channel. As disclosed, the first wall means include a rearwardly sloping floor or wall I4 (FIGS. I and 3) and upstanding walls 16 and 18 which extend upwardly from wall I4 and merge with a laterally outwardly extending upper surface or wall (FIGS. 2 and 5). The walls 14, I6 and I8 define a channel 21.
The shroud 12 also includes means defining an upstanding inlet throat or duct 22 (FIG. 3). As disclosed, such means is in the form of an annular flange 24 which projects upwardly from the channel floor 14 to define an upper opening 26. The annular flange also defines a lower opening 28 which communicates with the interior 27 of the shroud 12 to supply air to the engine carburetors.
The invention also includes second wall means on said shroud which cooperate with the first wall means to define a passage around the inlet throat 22 and to cover the upper opening 26. As disclosed, the second wall means includes an upper wall portion or cover 29 which is provided with downturned flanges 30 and 32 (FIG. 5) which are located inwardly of the wall portions 16 and I8, and interfit with the wall portions 16 and 18 to form a passage which is generally designated 34 and which is open at both its forward and rearward ends.
More specifically, the forward end 36 of the cover 29 (FIGS. 3 and 4) is spaced from the wall portion I4 to provide a forwardly located passage opening 38. The rearward edge 40 of the wall or cover 29 defines, in part, a rearwardly located passage opening 44 and is provided with an enlarged smooth wall portion 42 which forms a grip or handle for tilting the propulsion device. The spacing of the wall portion 42 from the wall portion 14 provides the rearwardly located passage opening 44 and also permits entry of fingers to facilitate gripping of the handle or wall portion 42.
To prevent water which enters the passage openings 38 or 44 from entering the inlet throat 22, the invention includes third wall means. As disclosed, the third wall means is in the form of an intermediate partition 46 which spans the distance between the downturned flanges 30 and 32 (FIG. 5) and extends forwardly from the handle 42 to a point spaced from the forward opening 38. The partition 46 includes a forwardly located upturned portion 50 which is in abutting engagement with a downturned flange 52 on the cover 29.
The partition 46 can be located either above the upper end of the annular flange 24 or can fit around the annular flange below the upper edge thereof. In the disclosed construction, the partition is located above the upper edge 54 of the annular flange 24 (FIG. 3) and separated from the upper flange edge 54 by a seal or gasket 56 which minimizes vibration of the partition 46. The partition 46 is secured to the cover 29 by bolts 58 which extend through apertures in the partition and are threadably received in bosses 60 which depend from the cover 29. The cover 29 can be secured to the wall 14 by bolts 62 which extend through apertures in wall 14 and are threadably received in bosses 64 (FIG. 3) which depend from the cover 29 and extend through the partition 46.
The partition 46 separates the passage 34 into upper and lower passage portions, respectively 66 and 68, and is provided with an aperture 69 located over the opening 26 in the inlet throat 22 to afford communication between the upper passage portion 66 with the inlet throat 22. A plurality of apertures 70 in the partition 46 afford communication of air entering the lower passage portion 68 with the upper passage portion 66 and, hence, with the inlet throat 22. The rearwardly sloping wall 14 provides rearward drainage of water through the passage opening 44. The upstanding flange 24 and the partition 46 prevent entry of water into the inlet throat 22.
Various of the features of the invention are set forth in the following claims.
What is claimed is:
l. A marine propulsion device comprising an engine shroud, first wall means on said shroud for defining a rearwardly sloping upwardly open channel, means defining an inlet throat in said channel upstanding from said first wall means and including an upper opening, said inlet throat being adapted to communicate with the engine carburetor, second wall means on said shroud cooperating with said first wall means to define a passage around said inlet throat and to cover said upper opening, said passage having forward and rearward openings located on opposite sides of said throat to supply air to said inlet throat.
2. A marine propulsion device in accordance with claim I wherein said second wall means also defines a rearwardly located handle adjacent said rearward passage opening for tilting the propulsion device about a tilt axis.
3. A marine propulsion device in accordance with claim 1 including third wall means for defining a partition located within said passage, said third wall means cooperating with said first and second wall means to define upper and lower passage portions, said upper passage being in communication with said inlet throat, said lower passage portion affording rearward drainage of water entering said forwardly located passage opening, and apertures in said partition to afford airflow from said lower passage to said upper passage for flow to said inlet throat.
4. A shroud for a marine propulsion device, said shroud comprising wall portions defining an upwardly open channel having a rearwardly sloping floor, an inlet throat extending upwardly from said channel floor, a cover over said channel and said inlet throat, said cover cooperating with said channel to provide a passage for supplying air to said inlet throat, said passage extending in opposite directions from said throat and having openings located forwardly and rearwardly with respect to said throat.
5. A shroud in accordance with claim 4, wherein said cover has an enlarged rearwardly located end to provide a handle for tilting the marine propulsion device.
6. A marine propulsion device comprising an engine shroud, first wall means on said shroud for defining a rearwardly sloping upwardly open channel, means defining an inlet throat in said channel upstanding from said first wall means and including an upperopening, said inlet throat being adapted to communicate with the engine carburetor, second wall means on said shroud cooperating with said first wall means to define a passage around said inlet throat and to cover said upper opening, said passage having forwardly and rearwardly located openings to supply air to said inlet throat, said second wall means also defining a rearwardly located handle adjacent said rearward passage opening for tilting the propulsion unit about a tilt axis, and third wall means defining a partition cooperating with said first and second wall means to define upper and lower passage portions, said upper passage portion being in communication with said inlet throat, said lower passage portion affording rearward drainage of water entering said forwardly located passage opening, and apertures in said partition to afford airflow from said lower passage to said upper passage for flow to said inlet throat.

Claims (6)

1. A marine propulsion device comprising an engine shroud, first wall means on said shroud for defining a rearwardly sloping upwardly open channel, means defining an inlet throat in said channel upstanding from said first wall means and including an upper opening, said inlet throat being adapted to communicate with the engine carburetor, second wall means on said shroud cooperating with said first wall means to define a passage around said inlet throat and to cover said upper opening, said passage having forward and rearward openings located on opposite sides of said throat to supply air to said inlet throat.
2. A marine propulsion device in accordance with claim 1 wherein said second wall means also defines a rearwardly located handle adjacent said rearward passage opening for tilting the propulsion device about a tilt axis.
3. A marine propulsion device in accordance with claim 1 including third wall means for defining a partition located within said passage, said third wall means cooperating with said first and second wall means to define upper and lower passage portions, said upper passage being in communication with said inlet throat, said lower passage portion affording rearward drainage of water entering said forwardly located passage opening, and apertures in said partition to afford airflow from said lower passage to said upper passage for flow to said inlet throat.
4. A shroud for a marine propulsion device, said shroud comprising wall portions defining an upwardly open channel having a rearwardly sloping floor, an inlet throat extending upwardly from said channel floor, a cover over said channel and said inlet throat, said cover cooperating with said channel to provide a passage for supplying air to said inlet throat, said passage extending in opposite directions from said throat and having openings located forwardly and rearwardly with respect to said throat.
5. A shroud in accordance with claim 4, wherein said cover has an enlarged rearwardly located end to provide a handle for tilting the marine propulsion device.
6. A marine propulsion device comprising an engine shroud, first wall means on said shroud for defining a rearwardly sloping upwardly open channel, means defining an inlet throat in said channel upstanding from said first wall means and including an upper opening, said inlet throat being adapted to communicate with the engine carburetor, second wall means on said shroud cooperating with said first wall means to define a passage around said inlet throat and to cover said upper opening, said passage having forwardly and rearwardly located openings to supply air to said inlet throat, said second wall means also defining a rearwardly located handle adjacent said rearward passage opening for tilting the propulsion unit about a tilt axis, and third wall means defining a partition cooperating with said first and second wall means to define upper and lower passage portions, said upper passage portion being in communication with sAid inlet throat, said lower passage portion affording rearward drainage of water entering said forwardly located passage opening, and apertures in said partition to afford airflow from said lower passage to said upper passage for flow to said inlet throat.
US851328A 1969-08-19 1969-08-19 Outboard motor shroud Expired - Lifetime US3610198A (en)

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Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773010A (en) * 1972-08-07 1973-11-20 Brunswick Corp Cowl for outboard motor
JPS539696U (en) * 1976-07-09 1978-01-26
JPS5359299U (en) * 1976-10-21 1978-05-20
JPS54163496U (en) * 1978-05-09 1979-11-15
US4379702A (en) * 1980-01-10 1983-04-12 Yamaha Hatsudoki Kabushiki Kaisha Intake duct for an outboard engine
US4403971A (en) * 1980-05-06 1983-09-13 Yamaha Hatsudoki Kabushiki Kaisha Intake duct for an outboard engine
US4452194A (en) * 1981-09-10 1984-06-05 Yamaha Hatsudoki Kabushiki Kaisha Outboard motor
US4571193A (en) * 1982-04-24 1986-02-18 Sanshin Kogyo Kabushiki Kaisha Outboard motor
US4632662A (en) * 1983-04-12 1986-12-30 Sanshin Kogyo Kabushiki Kaisha Mounting structure for an electronic parts unit of an outboard engine
US4722709A (en) * 1985-11-19 1988-02-02 Outboard Marine Corporation Marine propulsion device cowl assembly
US4723927A (en) * 1986-08-20 1988-02-09 Brunswick Corporation Marine drive outboard engine cowl
US4734070A (en) * 1986-06-26 1988-03-29 Outboard Marine Corporation Marine propulsion device air intake system
US4800854A (en) * 1987-07-24 1989-01-31 Brunswick Corporation Cowl assembly for an outboard motor
US4832641A (en) * 1986-10-07 1989-05-23 Sanshin Kogyo Kabushiki Kaisha Storage structure of liquid tank for marine propulsion
US4867120A (en) * 1987-07-24 1989-09-19 Brunswick Corporation One piece lower skirt for improving water resistance of an outboard motor
US4878468A (en) * 1987-07-24 1989-11-07 Brunswick Corporation Cowl assembly for an outboard motor
US4952180A (en) * 1988-04-21 1990-08-28 Sanshin Kogyo Kabushiki Kaisha Cowling for outboard motor
US4968276A (en) * 1988-04-25 1990-11-06 Sanshin Kogyo Kabushiki Kaisha Cowling for outboard unit
US4978321A (en) * 1984-03-26 1990-12-18 Ferguson Arthur R Baffled air intake system for outboard motors
US5046976A (en) * 1989-01-12 1991-09-10 Sanshin Kogyo Kabushiki Kaisha Cowling and air intake duct for outboard motor
US5052960A (en) * 1989-01-26 1991-10-01 Sanshin Kogyo Kabushiki Kaisha Suction device for outboard motor
US5052353A (en) * 1990-05-18 1991-10-01 Outboard Marine Corporation Marine propulsion device cowl assembly
US5080618A (en) * 1990-05-18 1992-01-14 Outboard Marine Corporation Marine propulsion device cowl assembly
US5181870A (en) * 1989-03-25 1993-01-26 Sanshin Kogyo Kabushiki Kaisha Cowling and air inlet device for outboard motor
US5181871A (en) * 1990-12-13 1993-01-26 Sanshin Kogyo Kabushiki Kaisha Suctioned air introducing system for the outboard motor
US5391099A (en) * 1994-01-07 1995-02-21 Allain; Charles V. Air intake protector for outboard motor
US5489227A (en) * 1993-09-03 1996-02-06 Sanshin Kogyo Kabushiki Kaisha Protective cowling for outboard motor
US5928043A (en) * 1996-12-19 1999-07-27 Honda Giken Kogyo Kabushiki Kaisha Air intake arrangement for outboard marine engines
US5996546A (en) * 1997-07-22 1999-12-07 Brunswick Corporation Integrated flywheel cover and air conduit passages
US6796859B1 (en) * 2000-11-16 2004-09-28 Bombardier Recreational Products Inc. Air intake silencer
US20050051384A1 (en) * 2003-09-10 2005-03-10 Breznik Evelyn A. Air intake silencer
US20060135008A1 (en) * 2004-12-20 2006-06-22 Yu Ito Outboard motor
US20100147257A1 (en) * 2008-12-12 2010-06-17 Honda Motor Co., Ltd. Outboard motor
JP2010138858A (en) * 2008-12-12 2010-06-24 Honda Motor Co Ltd Outboard motor
US20100255737A1 (en) * 2008-12-11 2010-10-07 Honda Motor Co., Ltd. Outboard motor
US9180950B1 (en) 2013-05-31 2015-11-10 Brp Us Inc. Outboard engine and air intake system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224900A (en) * 1938-06-06 1940-12-17 Outboard Marine & Mfg Co Outboard motor
US2834419A (en) * 1954-11-15 1958-05-13 Purolator Products Inc Hood and air cleaner mounting assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224900A (en) * 1938-06-06 1940-12-17 Outboard Marine & Mfg Co Outboard motor
US2834419A (en) * 1954-11-15 1958-05-13 Purolator Products Inc Hood and air cleaner mounting assembly

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773010A (en) * 1972-08-07 1973-11-20 Brunswick Corp Cowl for outboard motor
JPS539696U (en) * 1976-07-09 1978-01-26
JPS5730240Y2 (en) * 1976-07-09 1982-07-02
JPS5359299U (en) * 1976-10-21 1978-05-20
JPS5735519Y2 (en) * 1976-10-21 1982-08-05
JPS54163496U (en) * 1978-05-09 1979-11-15
JPS5820478Y2 (en) * 1978-05-09 1983-04-27 ヤマハ発動機株式会社 Outboard motor intake duct
US4379702A (en) * 1980-01-10 1983-04-12 Yamaha Hatsudoki Kabushiki Kaisha Intake duct for an outboard engine
US4403971A (en) * 1980-05-06 1983-09-13 Yamaha Hatsudoki Kabushiki Kaisha Intake duct for an outboard engine
US4452194A (en) * 1981-09-10 1984-06-05 Yamaha Hatsudoki Kabushiki Kaisha Outboard motor
US4571193A (en) * 1982-04-24 1986-02-18 Sanshin Kogyo Kabushiki Kaisha Outboard motor
US4632662A (en) * 1983-04-12 1986-12-30 Sanshin Kogyo Kabushiki Kaisha Mounting structure for an electronic parts unit of an outboard engine
US4978321A (en) * 1984-03-26 1990-12-18 Ferguson Arthur R Baffled air intake system for outboard motors
US4722709A (en) * 1985-11-19 1988-02-02 Outboard Marine Corporation Marine propulsion device cowl assembly
US4734070A (en) * 1986-06-26 1988-03-29 Outboard Marine Corporation Marine propulsion device air intake system
AU599657B2 (en) * 1986-06-26 1990-07-26 Outboard Marine Corporation Marine propulsion device air intake system
US4723927A (en) * 1986-08-20 1988-02-09 Brunswick Corporation Marine drive outboard engine cowl
US4832641A (en) * 1986-10-07 1989-05-23 Sanshin Kogyo Kabushiki Kaisha Storage structure of liquid tank for marine propulsion
US4800854A (en) * 1987-07-24 1989-01-31 Brunswick Corporation Cowl assembly for an outboard motor
US4867120A (en) * 1987-07-24 1989-09-19 Brunswick Corporation One piece lower skirt for improving water resistance of an outboard motor
US4878468A (en) * 1987-07-24 1989-11-07 Brunswick Corporation Cowl assembly for an outboard motor
US4952180A (en) * 1988-04-21 1990-08-28 Sanshin Kogyo Kabushiki Kaisha Cowling for outboard motor
US4968276A (en) * 1988-04-25 1990-11-06 Sanshin Kogyo Kabushiki Kaisha Cowling for outboard unit
US5046976A (en) * 1989-01-12 1991-09-10 Sanshin Kogyo Kabushiki Kaisha Cowling and air intake duct for outboard motor
US5052960A (en) * 1989-01-26 1991-10-01 Sanshin Kogyo Kabushiki Kaisha Suction device for outboard motor
US5181870A (en) * 1989-03-25 1993-01-26 Sanshin Kogyo Kabushiki Kaisha Cowling and air inlet device for outboard motor
US5052353A (en) * 1990-05-18 1991-10-01 Outboard Marine Corporation Marine propulsion device cowl assembly
US5080618A (en) * 1990-05-18 1992-01-14 Outboard Marine Corporation Marine propulsion device cowl assembly
US5181871A (en) * 1990-12-13 1993-01-26 Sanshin Kogyo Kabushiki Kaisha Suctioned air introducing system for the outboard motor
US5489227A (en) * 1993-09-03 1996-02-06 Sanshin Kogyo Kabushiki Kaisha Protective cowling for outboard motor
US5391099A (en) * 1994-01-07 1995-02-21 Allain; Charles V. Air intake protector for outboard motor
US5928043A (en) * 1996-12-19 1999-07-27 Honda Giken Kogyo Kabushiki Kaisha Air intake arrangement for outboard marine engines
US5996546A (en) * 1997-07-22 1999-12-07 Brunswick Corporation Integrated flywheel cover and air conduit passages
US6796859B1 (en) * 2000-11-16 2004-09-28 Bombardier Recreational Products Inc. Air intake silencer
US20050051384A1 (en) * 2003-09-10 2005-03-10 Breznik Evelyn A. Air intake silencer
US20060135008A1 (en) * 2004-12-20 2006-06-22 Yu Ito Outboard motor
US7252568B2 (en) * 2004-12-20 2007-08-07 Yamaha Marine Kabushiki Kaisha Outboard motor
US20100255737A1 (en) * 2008-12-11 2010-10-07 Honda Motor Co., Ltd. Outboard motor
US8083558B2 (en) 2008-12-11 2011-12-27 Honda Motor Co., Ltd. Outboard motor
US20100147257A1 (en) * 2008-12-12 2010-06-17 Honda Motor Co., Ltd. Outboard motor
JP2010138858A (en) * 2008-12-12 2010-06-24 Honda Motor Co Ltd Outboard motor
US8371885B2 (en) * 2008-12-12 2013-02-12 Honda Motor Co., Ltd Outboard motor
US9180950B1 (en) 2013-05-31 2015-11-10 Brp Us Inc. Outboard engine and air intake system

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