US5052960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction device for outboard motor
Assignee: Yamaha Marine Co Ltd
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Filing: 1990-01-25
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Granted: 1991-10-01
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Expires: 2010-01-25
Abstract
Abstract A cowling arrangement for an outboard motor including an improved air induction system including a cavity formed at the rear end of the main cowling portion and having at least three vertically upstanding ducts for delivering air to the interior of the main cowling and the engine for its operation. The ducts are arranged in such a manner as to improve water separation and prevent the ingestion of water into the engine.
Inventors
- 👤 Naoki Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:02
CPC Classifications
B; B63; B63H; B63H21/00; B63H21/38; F; F02; F02B; F02B61/00; F02B61/04; F02B61/045; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02M; F02M35/00; F02M35/02; F02M35/022; F02M35/10; F02M35/10006; F02M35/10013; F02M35/10242; F02M35/10262; F02M35/16; F02M35/165; F02M35/167; F02M35/168; F02B75/02; F02B2075/022; F02B2075/025; F02B2075/1804; F02B2075/1824; F02M35/104; F02M35/116; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
183 words
A protective cowling for the power head of an outboard motor to protect and provide an induction air supply for a V type internal combustion engine, said engine including a pair of angularly disposed rearwardly diverging cylinder banks, said protective cowling comprising a main cowling portion fixed to a lower tray and enclosing therewith the engine and defining a volume therearound, a cover fixed to the top of said main cowling portion and forming a cavity above said main cowling portion, an air inlet means formed between said main cowling portion and said cover for delivering atmospheric air to said cavity and at least three air delivery ducts each having opposed upwardly extending sidewalls terminating in an inlet opening at the tops thereof formed in the top of said main cowling portion for communicating said cavity with said volume for delivering atmospheric air to the engine for its operation, one of said ducts forming a center duct lying over the area between said cylinder banks and the other of said ducts each lying in part over a respective one of the cylinder banks.
Claim 2
Dependent Claim
183 words
A protective cowling for the power head of an outboard motor to protect and provide an induction air supply for a V type internal combustion engine, said engine including a pair of angularly disposed rearwardly diverging cylinder banks, said protective cowling comprising a main cowling portion fixed to a lower tray and enclosing therewith the engine and defining a volume therearound, a cover fixed to the top of said main cowling portion and forming a cavity above said main cowling portion, an air inlet means formed between said main cowling portion and said cover for delivering atmospheric air to said cavity and at least three air delivery ducts each having opposed upwardly extending sidewalls terminating in an inlet opening at the tops thereof formed in the top of said main cowling portion for communicating said cavity with said volume for delivering atmospheric air to the engine for its operation, one of said ducts forming a center duct lying over the area between said cylinder banks and the other of said ducts each lying in part over a respective one of the cylinder banks.
Claim 3
Dependent Claim
31 words
A protective cowling as set forth in claim 1 wherein the pair of ducts are disposed on opposite sides of the main cowling portion and spaced forwardly from the center duct.
Claim 4
Dependent Claim
28 words
A protective cowling as set forth in claim 2 wherein the pair of ducts have their inlet openings disposed lower than the inlet opening of the center duct.
Claim 5
Dependent Claim
44 words
A protective cowling as set forth in claim 3 further including wall means interposed between the air inlet means and the inlet openings of the ducts for redirecting the air flow toward the duct inlet openings and for separating water from air flowing therein.
Claim 6
Dependent Claim
26 words
A protective cowling as set forth in claim 4 wherein the air inlet means has a vertical height less than the vertical height of the wall.
Claim 7
Dependent Claim
55 words
A protective cowling as set forth in claim 1 wherein the main cowling portion comprises a main cowling member having a depression at one end thereof and the cover is affixed to the main cowling portion and covering the depressed portion, said cover and said main cowling part defining between them the air inlet means.
Claim 8
Dependent Claim
31 words
A protective cowling as set forth in claim 6 wherein the pair of ducts are disposed on opposite sides of the main cowling portion and spaced forwardly from the center duct.
Claim 9
Dependent Claim
28 words
A protective cowling as set forth in claim 7 wherein the pair of ducts have their inlet openings disposed lower than the inlet opening of the center duct.
Claim 10
Dependent Claim
44 words
A protective cowling as set forth in claim 8 further including wall means interposed between the air inlet means and the inlet openings of the ducts for redirecting the air flow toward the duct inlet openings and for separating water from air flowing therein.
Claim 11
Dependent Claim
31 words
A protective cowling as set forth in claim 6 wherein the pair of ducts are disposed on opposite sides of the main cowling portion and spaced forwardly from the center duct.
Claim 12
Dependent Claim
28 words
A protective cowling as set forth in claim 10 wherein the pair of ducts have their inlet openings disposed lower than the inlet opening of the center duct.
Claim 13
Dependent Claim
44 words
A protective cowling as set forth in claim 11 further including wall means interposed between the air inlet means and the inlet openings of the ducts for redirecting the air flow toward the duct inlet openings and for separating water from air flowing therein.
Claim 14
Dependent Claim
26 words
A protective cowling as set forth in claim 12 wherein the air inlet means has a vertical height less than the vertical height of the wall.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |