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Publication numberUS3610198 A
Publication typeGrant
Publication dateOct 5, 1971
Filing dateAug 19, 1969
Priority dateAug 19, 1969
Publication numberUS 3610198 A, US 3610198A, US-A-3610198, US3610198 A, US3610198A
InventorsNorman J Alexandrowicz
Original AssigneeOutboard Marine Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Outboard motor shroud
US 3610198 A
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Description  (OCR text may contain errors)

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.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2224900 *Jun 6, 1938Dec 17, 1940Outboard Marine & Mfg CoOutboard motor
US2834419 *Nov 15, 1954May 13, 1958Purolator Products IncHood and air cleaner mounting assembly
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3773010 *Aug 7, 1972Nov 20, 1973Brunswick CorpCowl for outboard motor
US4379702 *Jan 5, 1981Apr 12, 1983Yamaha Hatsudoki Kabushiki KaishaIntake duct for an outboard engine
US4403971 *May 4, 1981Sep 13, 1983Yamaha Hatsudoki Kabushiki KaishaIntake duct for an outboard engine
US4452194 *Sep 2, 1982Jun 5, 1984Yamaha Hatsudoki Kabushiki KaishaOutboard motor
US4571193 *Apr 14, 1983Feb 18, 1986Sanshin Kogyo Kabushiki KaishaAir inlet system
US4632662 *Apr 9, 1984Dec 30, 1986Sanshin Kogyo Kabushiki KaishaMounting structure for an electronic parts unit of an outboard engine
US4722709 *Nov 19, 1985Feb 2, 1988Outboard Marine CorporationMarine propulsion device cowl assembly
US4723927 *Aug 20, 1986Feb 9, 1988Brunswick CorporationMarine drive outboard engine cowl
US4734070 *Jun 26, 1986Mar 29, 1988Outboard Marine CorporationMarine propulsion device air intake system
US4800854 *Jul 24, 1987Jan 31, 1989Brunswick CorporationCowl assembly for an outboard motor
US4832641 *Oct 6, 1987May 23, 1989Sanshin Kogyo Kabushiki KaishaStorage structure of liquid tank for marine propulsion
US4867120 *Dec 6, 1988Sep 19, 1989Brunswick CorporationOne piece lower skirt for improving water resistance of an outboard motor
US4878468 *Dec 6, 1988Nov 7, 1989Brunswick CorporationCowl assembly for an outboard motor
US4952180 *Apr 20, 1989Aug 28, 1990Sanshin Kogyo Kabushiki KaishaCowling for outboard motor
US4968276 *Apr 24, 1989Nov 6, 1990Sanshin Kogyo Kabushiki KaishaCowling for outboard unit
US4978321 *Nov 12, 1985Dec 18, 1990Ferguson Arthur RMarine propulsion
US5046976 *Jan 11, 1990Sep 10, 1991Sanshin Kogyo Kabushiki KaishaCowling and air intake duct for outboard motor
US5052353 *May 18, 1990Oct 1, 1991Outboard Marine CorporationMarine propulsion device cowl assembly
US5052960 *Jan 25, 1990Oct 1, 1991Sanshin Kogyo Kabushiki KaishaSuction device for outboard motor
US5080618 *May 18, 1990Jan 14, 1992Outboard Marine CorporationMarine propulsion device cowl assembly
US5181870 *May 24, 1991Jan 26, 1993Sanshin Kogyo Kabushiki KaishaCowling and air inlet device for outboard motor
US5181871 *Dec 10, 1991Jan 26, 1993Sanshin Kogyo Kabushiki KaishaSuctioned air introducing system for the outboard motor
US5391099 *Jan 7, 1994Feb 21, 1995Allain; Charles V.Air intake protector for outboard motor
US5489227 *Sep 6, 1994Feb 6, 1996Sanshin Kogyo Kabushiki KaishaProtective cowling for outboard motor
US5928043 *Dec 19, 1997Jul 27, 1999Honda Giken Kogyo Kabushiki KaishaAir intake arrangement for outboard marine engines
US5996546 *Jul 22, 1997Dec 7, 1999Brunswick CorporationIntegrated flywheel cover and air conduit passages
US6796859 *Nov 16, 2000Sep 28, 2004Bombardier Recreational Products Inc.Air intake silencer
US7252568 *Dec 20, 2005Aug 7, 2007Yamaha Marine Kabushiki KaishaOutboard motor
US8083558Oct 28, 2009Dec 27, 2011Honda Motor Co., Ltd.Outboard motor
US8371885 *Nov 25, 2009Feb 12, 2013Honda Motor Co., LtdOutboard motor
US20100147257 *Nov 25, 2009Jun 17, 2010Honda Motor Co., Ltd.Outboard motor
Classifications
U.S. Classification440/77, 123/195.00P
International ClassificationF02B61/04, F02M35/16
Cooperative ClassificationF02M35/10262, F02M35/168, F02B61/045, Y02T10/146, F02M35/10013
European ClassificationF02M35/10A2, F02M35/16M2W, F02M35/10K6, F02B61/04B