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Патент USA US3090355

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May 21, 1963
K. H. BURGIN
3,090,346
BOAT PROPELLING WATER JET NOZZLE
Filed May 51, 1962
5 sheets-sheet 1
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IINVENTUR
KERMIT H. EURErIN
ATIDRNEX
May 21, 1963
K. H. BURGIN
3,090,346
BOAT PROPELLING WATER JET NOZZLE
Filed May 31, 1962
5 Sheets-Sheet 2
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KERMIT H. BURErIN
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May 21, 1963
K. H. BURGIN
3,090,346
BOAT PROPELLING WATER JET NOZZLE
Filed May 31, 1962
11:15: 9
5 Sheets-Sheet 3
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ENVENTUR
KERN] IT H. BURErIN
HEY Mam-1a.“)
ATT U'R NEY
United States Patent 0
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3,®90,34h
Patented May 21, 1963
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3,090,346
boat 18 as indicated in FIG. 1. The lower end of the
pump 16 has a screen member 20 thereacross, and this is
BGAT PROPELLING WATER JET NGZZLE
"
Kermit H. ‘Burgin, Whitestown, 11111., assignor of titty
percent to Frederick B. Cline, Indianapoiis, 1nd.
Filed May 31, 1962, Ser. No. 193,945
6 Claims. (Cl. 115-12)
submerged below the line 19.
The pump 16 connects into a manifold 21 across its
top end, intermediate the pump 16 and the engine 15.
This manifold 21 receives the full delivery of the pump
16. The manifold 21 branches into two chambers 22
This invention relates to a nozzle for ejecting a jet of
and 23.
water as propelling means for boats. It is of particular
These chambers 22 and 23 located to each side of the
advantage when incorporated with a so-called outboard 10 manifold 21 each has a downwardly directed opening
motor and also with inboard motors. That is, the device
24 discharging into a nozzle base member 25. The
may be attached and detached from the boats.
Reference is made to my copending application, Serial
lower end of this base 25 is angularly disposed and car
ries a nozzle 26 revolubly therearound.
No. 101,938, ?led April 10, 1961, Water Jet Drive for
The manifold 21 carries therein an engine exhaust
Boats, since terminating July 31, 1962. in Patent No. 15 and engine water return chamber 27. This chamber 27
3,046,735.
is sealed off from any discharge into the manifold 21 and
Among the many objects and advantages of the inven
the chambers 22 and 23 except through an enclosed tube
tion are the following: high propelling power is obtained
23 in each instance leading from the lower side portion
with a high degree of safety in the absence of any hot
of the chamber 27 into a conduit 29 leading downwardly
exhaust. The device permits easy steering of the boat in 20 from the chamber 22. Centrally through the base 25 and
the absence of operating any valves or the like, and has
thence curving around outwardly by a lower discharge
the further decided advantage of tending to lift the stern
end portion 3% which terminates outwardly slightly be
end of the boat when the boat is being driven in reverse,
yond the open end of the nozzle 26‘. That is, water which
or a rearward travel as opposed to the normal forward
has been elevated by the pump 16 to the engine 15 and
direction of travel. There is better control of the boat 25 employed in cooling the engine is returned downwardly
in steering in turns. A very simple construction is em
from the engine into the chamber 27. Also the exhaust
ployed with speed at all times being determined by the
of the engine 15 is directed into this chamber 27. The
speed of the engine which is employed to force water
particular connections in the water cooling system and
through nozzles. Also, there is some added propulsive
the exhaust system are not herein shown since they are
power obtained in delivering the exhaust from the engine
within the realm of those versed in the art and consist of
together with extruding water into and outwardly in the
simple interconnections, which connections do not form
propelling jet proper. Then in addition, there is the
a part of the present invention per se.
feature of the direction of the discharging jet being
In the form herein shown, the chambers 22 and 23
changed from a normal rearwardly directed line initially
are formed in separate castings which are attached to
above the surface of the water in which the boat rides, to 35 the respective opposite sides of the manifold 21, FIG.
a more downwardly directed direction to obtain the above
5. The base members 25 are for-med in separate cast
indicated lifting action in reverse.
ings and attached to the undersides of the members 22
These and other objects and advantages of the inven
and 23. The tube 28 has an integral ?ange 31 spaced from
tion will become apparent to those versed in the art in the
the end which enters the chamber 27, and a packing ring
following description of one particular form of the in
such as the usual 0 ring 32 surrounds the tube 28 to
vention as illustrated in the accompanying drawings, in
be compressed between the ?ange 31 and the side of
which
the manifold 27. Likewise there is a second ?ange 33
FIG. 1 is a view in side elevation and partial section of
around the opposite end portion of the tube 28, and an
a structure embodying the invention;
O ring 34 is compressibly engaged between this ?ange
FIG. 2 is a view in top plan of the structure;
33 and the end of the conduit 29 into which the tube 28
FIG. 3 is a view in bottom plan of the screen at the
is inserted. The conduit 29, FIG. 5, extends from the
intake of the pump included in the structure;
tube 28 through a ninety degree bend 35 into a short
FIG. 4 is a diagram on an enlarged scale illustrating
straight length 35a which terminates in the plane of the
the change in direction of the jet delivered by the nozzle
opening 24-. Then the base member 25 carries a conduit
upon its rotation;
50 length 35b which sealably interconnects with the conduit
FIG. 5 is a view in rear elevation of a part of the struc
ture (less the engine) and in partial section of the struc
ture;
FIG. 6 is a vertical section on the line 6-—6 in FIG. 5;
FIG. 7 is a horizontal section on the line 7~7 in
PEG. 5;
FIG. 8 is a view in top plan of a detail of the steering
gear with a portion of the cover broken away;
FIG. 9 is a view on an enlarged scale in vertical sec
tion on the line 9—9 in FIG. 5;
FIG. 10 is a view in section on the line 10-10 in
FIG. 9;
FIG. 11 is a view in reduced scale on the line 11-11
length 35a, and is supported in the base member 25 by
means of integral arms 25a and 25b so as to form a
continuous conduit down to these arms 25a and 25b.
The lower end of the base member 25 terminates in
an opening lying in a plane diagonally disposed to the
plane of the opening from the chamber 22. This plane
is in the angular position as indicated by the section line
12-12, and the angle in degrees may vary from around
twelve to twenty degrees depending upon the elevation
of the nozzle opening above the water level of the body
in which the boat is to be operated, and also the height
of the transom 17, with other factors being considered,
namely one of which is the avoidance of having a jet
directed forwardly against the transom when reverse
FIG. 12 is a view on a reduced scale in section on the 65 travel ‘is desired. In any event, the lower end of the
line 12-12 in FIG. 9.
base member 25 is angularly disposed in a ?xed, constant
A motor 15 of any conventional design now readily
position relative to the manifold 21 and its attached
obtainable in the market, such as is commonly employed
chambers 22 and 23. It is not intended that this base
in outboard motor drives, is mounted on a pump 16, and
member be revolubly changed at any time but always re~
this assembly is mounted in any suitable manner such as 70 main ?xed as indicated.
on the transom 17 of a boat 18. The line 19 indicates
The lower end of the base member 25 is counterbored
the normal water level in relation to the hull of the
to receive in effect a nipple 37 extending upwardly from
in FIG. 9; and
A
ii
nates short of the juncture between the base member 25
and the nozzle nipple 37. A ring 53 is seated in a ?xed
39 surround the nipple 37 and lit into the counterbore
manner in the nipple 37. On diametrically opposed sides
to afford not only a radial but also a thrust bearing com
of the ring 53 there extend upwardly the arms 54 and 55
bination against which there bears a collar 49 surrounding
the nipple 37.
5 adjacent to but clearing the wall of the base carried con
duit portion 35b.
There is a groove 41 extending around the nozzle 26
The lower end portion 51a of the shaft 5-1 is provided
immediately below the collar 40. A plurality of retaili
with a slot 56 therethrough to receive freely a pin 57
ing screws 42 screw-threadedly pass through the wall 4-3
which is anchored by its ends in the upper portions of
of the base member 25, FIG. 9, and enter the groove 4-1
as a means of retaining the nozzle 26 on the base member 10 the arms 54 and 55. This interconnection of the shaft
51 with ‘the nozzle 26 is thus effected by what is known to
25. The thrust of the nozzle 26 is always against the
mechanics as a Scotch yoke. In any event, rotation of
bearings 38 and 39 when the device is in operation. The
the gear 56 turns the shaft 51, and in turn rotates the
packing ring 44 surrounds the upper end of the nipple
nozzle 26.
37 to bear against the counter-bore wall in order to pre
A larger gear 58 is in constant mesh with the gear 50,
vent leakage between the member 25 and past the bear 15
and is rotatably mounted on a stud 59. This stud 59
ings to the outside of the nozzle 26.
extends upwardly from the topside of the gear 53 in a
The conduit 29 continues from the portion 35b in the
?xed manner, and extends through a cover 69 to receive
base member 25 in an arcuate manner by the length 35c
a retraining nut 61 screw-threadedly thereon, FIG. 9.
terminating externally of the end 26a of the nozzle 26 as
A lever 62 extends through a slot 63 in the side of the
above indicated and is shown in FIG. 9. This length
cover 69, and is ?xed to a boss 64 in turn ?xed to the
350 of the conduit 29 is ?xed centrally throughout the
gear 58. The lever 62 extends in each instance from
nozzle '26 by means of webs 45 and 46 extending be—
each of the housings 60, one on each side of the manifold
tween the portion 35c and the wall of the nozzle. Since
21. The two levers 62 extend forwardly over the transom
the conduit 29 is thus supported centrally from the man
ifold 21 to the chambers 22 and 23 in each instance and 25 17 and are interconnected forwardly of the engine 15 by
any suitable means, herein shown as by a rigid length 65
through the respective base members 25 and the nozzle
so that through the two levers 62, the nozzles 26 may be
26 on each base member, there is left a relatively large
turned in unison.
cross-sectional area for water flow from the manifold 21
Therefore while I have herein shown and described my
in each direction around the outside of the conduit 29
invention in the one particular form, it is obvious that
and out through the nozzle 25 through its discharge end
structural "ariations may be employed, such for example
26a.
as employing but a single discharge from the pump to
The nozzle 26, shown in a diagrammatic representa
operate a single jet nozzle, and means for rotating the jet
tion as to its mounting in FIG. 4, is, as above indicated,
nozzle. Therefore I do not intend to be limited to that
revoluble about the lower end of the base member 25
on a plane angularly disposed to the horizontal, and here- - precise form as above described in detail anymore than
may be required by the following claims.
in indicated by the line 47. For forward propulsion of
1 claim:
the boat 18, the nozzle will be directed in the solid line
1. In a propelling mechanism, for mounting on a boat,
position to discharge water coming under pressure from
the nozzle 26. A pair of spaced apart bearings 38 and
the pump 16 angularly rearwardly and downwardly to
ward the water surface, generally in direction of the
the combination with a motor and a motor driven
pump, of
solid arrow. The discharge from the end 30 of the con
duit 29 will be in the center of the propelling water dis
charge, so that to all intents and purposes, there is a
a pump water discharge conduit terminating by
single discharge from each nozzle 26 with exhaust gases
on said conduit end to have the nozzle upon
rotation selectively discharge from an end in a
range of directions from rearwardly and down—
intermingled therein together with the discharge of the 45
Water coming from the engine cooling system.
To completely reverse the direction of the travel of the
boat 17, the nozzle will be turned 180 degrees to the
position indicated by the dash lines, and due to the
angularity of the plane 47, the nozzle will be directed for 50
wardly and downwardly to a greater degree than it was
directed in the solid line position, but with the end 3% of
the conduit 29 in the end 26a of the nozzle 26 still being
maintained above the water line, but directed so that the
discharges will be not against the transom 17 but down 55
wardly and toward a zone under that transom. In this
position of the nozzle 26, wherein the discharges indi
cated by the dash line arrow FIG. 4, the jet of water
will tend to lift the mechanism and in turn lift the boat
nozzle mounting end;
a water discharge elbow nozzle swivelly mounted
wardly from the horizontal to forwardly and
downwardly;
means mounting said mechanism on said boat to
have said nozzle discharge at all times above
the level of the water in which said boat ?oats;
an exhaust line leading from said motor through
said conduit to a central zone of said conduit
discharge end;
an extension of said line continuing arcuately
from a swivel connection with said line cen
trally throughout said nozzle and terminating
by an end spaced outwardly from and centrally
of said nozzle discharge end; and
means rotating said nozzle.
18 to which it is attached thereby aiding in control of 60
2. The structure of claim 1, in which said motor is
the boat in the rear travel rather than causing the stern
water cooled and has a
end of the boat 18 to sinkdeeper.
discharge of cooling water into said exhaust line.
A variety of means may be employed to rotate the two
3. The structure of claim 1, in which
nozzles 26, one such control device being herein shown,
said
conduit end slopes upwardly and rearwardly in
primarily in FIG. 9. It is essential that both nozzles 26
respect to forward travel of the boat.
be rotated simultaneously with common directions of dis
4. The structure of claim 3, in which said conduit end
charge jets. On the top of the chambers 22 and 23 in
slope is at
,
each instance there is carried a gear Wheel 50 ?xed to a
an angle to the horizontal within the range of from
. vertically disposed shaft 51, which in turn extends down 70
wardly through a housing 52 ending on the topside of the
twelve to twenty degrees, and the turning of the
conduit bend 35.
nozzle on said end from a forward driving of the
boat to a rearward drive of the boat directs the
The shaft 51 continues on down cen
trally through the conduit length 35a. The lower end
portion of the shaft 51 extends through the base member
25. This lower end designated by the numeral 51a termi
nozzle discharge from above said Water level down~
wardly to a greater degree than the direction of dis—
3,090,346
5
6
charge of the nozzle is in the forward drive of the
5 131?]?- U
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f 1 _
1 _ vh_ h’ ,d
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mg ‘mag: “c ‘6 ° C‘ mm "D ’ 1° s2“ 11° “m a '
extends from outside into said conduit and connects 5
.
.
References Cited in the ?le of this patent
.
with Sam nozzle *h‘irem'
has. The structure of claim 1, in which said elbow nozzle
UNITED STATES PATENTS
216,140
2’024’274
2,543,024
Humphrey __________ __ Feb. 27, 1951
3,044,259
Tattle ______________ __ July 17, 1962
3,046,173 5
Burgin ______________ __ July 31, 1962
902,229
877,982
Germany ____________ __ Oct. 18, 1954
Great Britain _________ __ Sept. 20, 1961
less than a ninety degree bend between said conduit
end and the nozzle discharge end effecting said 10
downwardly directions of discharge.
Brewer et a1 ___________ __ June 3, 187%
campml ““““““““““ " Dec’ 17’ 193D
FOREIGN PATENTS
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