U.S. patent number RE33,488 [Application Number 07/419,937] was granted by the patent office on 1990-12-11 for marine vessel with internal combustion engine having an exhaust pipe.
This patent grant is currently assigned to Yamaha Hatsudoki Kabushiki Kaisha. Invention is credited to Noboru Kobayashi.
United States Patent |
RE33,488 |
Kobayashi |
December 11, 1990 |
Marine vessel with internal combustion engine having an exhaust
pipe
Abstract
A boat having an internal combustion engine with an exhaust pipe
comprises a boat body having a bow and a stern, and a hollow
section formed in the boat body. The hollow section is provided
with at least one opening at the stern for communication between
the hollow section and the atmosphere. The exhaust pipe is
connected to the hollow section so that exhaust gas from the engine
is exhausted to the atmosphere through the hollow section.
Inventors: |
Kobayashi; Noboru (Kosai,
JP) |
Assignee: |
Yamaha Hatsudoki Kabushiki
Kaisha (Iwata, JP)
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Family
ID: |
17423504 |
Appl.
No.: |
07/419,937 |
Filed: |
October 11, 1989 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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934229 |
Nov 21, 1986 |
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Reissue of: |
178836 |
Mar 23, 1988 |
04824409 |
Apr 25, 1989 |
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Foreign Application Priority Data
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Nov 26, 1985 [JP] |
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60-265889 |
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Current U.S.
Class: |
440/47;
440/89R |
Current CPC
Class: |
B63B
34/10 (20200201); B63H 21/32 (20130101); F01N
13/12 (20130101) |
Current International
Class: |
B63B
35/73 (20060101); F01N 7/00 (20060101); B63H
21/32 (20060101); F01N 7/12 (20060101); B63H
011/02 () |
Field of
Search: |
;114/270
;440/38,40,44,47,89 ;60/221,222 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Peters, Jr.; Joseph F.
Assistant Examiner: Avila; Stephen P.
Attorney, Agent or Firm: Jordan and Hamburg
Parent Case Text
This application is a continuation of Ser. No. 934,229, filed Nov.
21, 1986, now abandoned.
Claims
What is claimed is:
1. A boat operated by an internal combustion engine comprising a
boat body having a bow and a stern, said engine being mounted on
said boat body, inlet means in said boat body for receiving water
from outside the boat body, a flow passage means extending from
said inlet means to the stern of the boat, said flow passage means
having an outlet nozzle disposed at the stern of the boat through
which the water exits from the flow passage means, a propeller
disposed within said flow passage means, a hollow enclosure means
mounted on said boat body and enclosing therein substantially the
entire flow passage means, said hollow enclosure means having two
generally upright side .[.walls extending fore and aft.].
.Iadd.wall means .Iaddend.and a top wall connected to said
.Iadd.two .Iaddend.upright side .[.walls.]. .Iadd.wall means
.Iaddend.such that said hollow enclosure means has a substantially
inverted U-shaped cross-sectional configuration, said hollow
enclosure means also having an opening at one end thereof located
at the stern of the boat, said hollow enclosure means further
having a forward transverse wall, a propeller drive shaft extending
between said engine and said propeller, a propeller shaft enclosure
means disposed about said shaft, said propeller shaft enclosure
means being connected to said flow passage means and extending
forward of said inlet means, said propeller shaft enclosure means
extending through said forward transverse wall of said hollow
enclosure means, said engine having an exhaust conduit connected to
one of said .Iadd.two .Iaddend.side .[.walls.]. .Iadd.walls means
.Iaddend.of said hollow enclosure means such that exhaust gases
from the engine pass into said hollow enclosure means and exit the
latter through said opening in said hollow enclosure means, said
flow passage means being spaced from said .Iadd.two
.Iaddend.upright side .[.walls.]..Iadd.wall means .Iaddend.and also
being spaced from said top wall, said flow passage means being
thereby disposed within said hollow enclosure means such that under
operating conditions of the boat, a pressure less than atmospheric
pressure is provided within the hollow enclosure means to
facilitate the exhaust of the engine exhaust gases from said
exhaust conduit into said hollow enclosure means.
2. A boat according to claim 1, wherein said boat body comprises a
bottom section and a top deck section, said inlet means being in
said bottom section, said hollow enclosure means being disposed
between said top deck section and said bottom section and being
mounted on said bottom section.
Description
BACKGROUND OF THE INVENTION AND RELATED ART STATEMENT
The present invention relates to a boat, more particularly, a small
boat operated by an internal combustion engine.
In a small boat equipped with an internal combustion engine, an
exhaust pipe connected to an exhaust system of the engine is lead
outside the boat and is fixed at a desired position. If a funnel is
attached to the exhaust pipe, the outside appearance of the boat is
not attractive. On the other hand, if an exhaust pipe is directly
exposed outside of the boat without use of a funnel, the area
adjacent to the exhaust pipe becomes dirty by the exhaust gas.
Since the funnel or the area adjacent the exhaust pipe is
substantially directly exposed outside the boat, the funnel and the
adjacent area becomes hot. Therefore, it is dangerous to touch
these portions.
Accordingly, an object of the present invention is to obviate the
above drawbacks of the prior art.
Another object of the invention is to provide a boat, which does
not become dirty by the exhaust gas of an engine.
A further object of the invention is to provide a boat as stated
above, in which danger caused by hot exhaust gas is substantially
eliminated.
A still further object of the invention is to provide a boat as
stated above, in which the exhaust ability is improved.
Further objects and advantages of the invention will be apparent
from the following description of the invention.
SUMMARY OF THE INVENTION
A boat in accordance with the present invention is equipped with
and operated by an internal combustion engine with an exhaust pipe.
The boat comprises a boat body having a bow and a stern, and a
hollow section formed on the boat body. The hollow section includes
at least one opening at the stern for communication between the
hollow section and atmosphere. The exhaust pipe is connected to the
hollow section so that exhaust gas from the engine is exhausted to
atmosphere through the hollow section.
The boat is further provided with a propelling device connected to
the engine. The propelling device is situated in the hollow section
so that when the boat is moved by the engine, the hollow section is
exposed to negative pressure by the propelling device to thereby
exhaust the exhaust gas smoothly through the hollow section.
The propelling device includes a flow conduit located in the hollow
section, and a propeller situated in the flow conduit. The
propeller is connected to the engine so that when the engine is
actuated, the propeller operates to eject water from the flow
conduit to advance the boat.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a partly cut side view of a boat in accordance with the
present invention; and
FIG. 2 is a partly cut plan view of a boat of the present
invention.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
Referring to FIGS. 1 and 2, a boat 100 in accordance with the
present invention is shown. The boat 100 comprises a bottom member
20, gunwales 88 extending from a bow to stern, and an upper deck 21
at an upper front portion of the boat. An engine compartment 29 is
formed in a sealed space substantially surrounded by the bottom
member 20 and the upper deck 21.
A seat 50 is formed on the boat 100 rearwardly of the upper deck
21. The seat 50 extends upwardly beyond the gunwales 88 and also
extends rearwardly from a center of the boat 100 to the stern. A
foot deck 30 is formed adjacent to the bottom member 20 between the
seat 50 and the gunwales 88. The foot deck 30 extends rearwardly
without being blocked.
In the center portion of the boat 100 slightly frontward of the
seat 50, a hatch 28 which is a part of the upper deck 21 is
openably provided. A handle support 61 for supporting a handle is
formed adjacent to the hatch 28. In operation, an operator 11 sits
on the seat 50 with legs on the foot deck 30 and holds the handle
60 to drive the boat 100. In this condition, the operator can move
his body to the right and left, or fore and back.
The boat 100 is provided, under the seat 50, with a water inlet 32
formed in the bottom member 20, a flow path 33 connected to the
inlet 32, and a nozzle 34 at the stern. The nozzle 34 is connected
to the flow path 33 so that the nozzle 34 can pivot horizontally. A
propeller 35 operationally connected to an engine 14 by a shaft 36
is situated in the flow path 33. When the engine 14 is actuated,
the propeller 35 rotates to thereby take in water from the inlet 32
and eject water rearwardly from the nozzle 34 through the flow path
33. The boat 100 moves by ejection of water. The direction of the
boat 100 can be changed by changing the direction of the nozzle
34.
A hollow section 70 is formed between the seat 50 and the bottom
member 20, in which the flow path 33 and the nozzle 34 are
situated. Namely, an inverted U-shaped plate 72 in cross section is
attached to the bottom member 20. The seat 50 is placed onto the
plate 72. A front end of the hollow section 70 is closed by a
partition member 71, and a rear end thereof is left open rearwardly
to form an opening 73, through which water from the nozzle 34 is
ejected.
The shaft 36 of the engine 14 passes through the partition plate 71
and is connected to the propeller 35 in the flow path 33. An
exhaust pipe 40 connected to the engine 14 extends rearwardly
alongside the hollow section 70. An outlet 41 of the exhaust pipe
40 passes through the plate 72 adjacent to the flow path 33.
Accordingly, when the engine 14 is actuated, exhaust gas from the
engine 14 is lead to the hollow section 70 through the exhaust pipe
40. The exhaust gas in the hollow section 70 is then exhausted to
atmosphere through the opening 73. Therefore, exhaust gas does not
contact the outer surface of the boat 100. The area where exhaust
gas contacts the boat is adjacent to the outlet 41 inside the
hollow section 70, which can not be seen from outside. Therefore,
there is no possibility that the boat 100 will become dirty by the
exhaust gas.
Further, since the exhaust pipe 40 and the outlet 41 are not
directly exposed outside, there is no possibility that anyone will
be injured by hot exhaust gas. Also, there is no possibility that
an operator breathes in exhaust gas. This structure also provides
an advantage that noise from the engine is diminished.
Further, when the boat 100 is cruising, water is ejected from the
nozzle 34, so that pressure inside the hollow section 70 is lower
than atmosphere. Consequently, the hollow section 70 draws in
exhaust gas, to thereby improve exhaust ability.
While the invention has been explained with reference to a specific
embodiment of the invention, the explanation is illustrative and
the invention is limited only by the appended claims.
* * * * *