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Патент USA US3020882

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Feb. 13, 1962
3,020,872
R. P. GIERCZIC
WATER JET-PROPELLED CRAFT
4 Sheets-Sheet 1
Filed March 24, 1961
Al
INVENTOR
E/C'HA P0
P. G/EEC'Z/ 0
M01
Feb. 13, 1962
R. P. GIERCZIC
3,020,872
WATER JET-PROPELLED CRAFT
Filed March 24, 1961
4 Sheets-Sheet 2
Feb. 13, 1962
R. P. GIERCZIC
3,020,872
WATER JET-PROPELLED CRAFT
Filed March 24, 1961
4 Sheets-Sheet 3
37.7
I-NVENTOR.
Feb. 13, 1962
R. P. GIERCZIC
3,020,872
WATER JET-PROPELLED CRAFT
Filed March 24, 1961
4 Sheets-Sheet 4
United States Patent
1
ice
3,020,872
Patented Feb. 13, 1962
2
powerboat hull 16 having relatively straight parallel sides
3,020,872
18 having convergent forward portions 20 meeting 1n a
forwardly canted stem or prow 22, a squared transom 24,
and a specially formed relatively ?at bottom 26.
As shown in FIGURES 1 and 2, the hull bottom 26
comprises a ?at horizontal main portion 28, which ex
WATER JET-PROPELLED CRAFT
Richard P. Gierczic, Metairie, La.
(10139 Seawood Drive, New Orleans 27, La.)
Filed Mar. 24, 1961, Ser. No. 98,226
13 ?airns. (Cl. 115-—12)
tends for a major portion of the length of the hull 16, and
terminates, at its rear end, in an upwardly and rear
This invention relates to a novel water jet-propelled and
wardly angled and curved, straight transverse kick-up 30.
water jet-steered craft.
10 The kick-up 30 merges, at its upper end, into a ?at hori
The primary object of the invention is the provision
zontal rear bottom portion 32, which reaches to the lower
of an improved craft of the kind indicated which is more
end of the transom. The rear bottom portion 32, as
shown in FIGURE 2, is spaced above the main bottom
efficient, stabler, and more safely and easily maneuverable,
and which can be reversed and steered through 360°.
portion 28. A ?at, substantially unindented ?oor 34
Another object of the invention is the provision of a 15 extends across and along the interior of the hull 16, on
craft of the character indicated above wherein the engine
the level of the rear bottom portion 32, and is spaced
and pump assembly for the jet is simpler and more com
upwardly from the main bottom portion 28. The portion
pact, and wherein the design of the hull bottom and the
36 of the floor immediately forward of the kick-up 30,
water scoop incorporated in the hull bottom reduces the
upon which the power plant rests, is braced by transverse
power requirement of the engine and assists the pump in 20 members 38.
producing a powerful water jet.
A longitudinally elongated water scoop 40 indents the
A further object of the invention is the provision of a
main bottom portion 28, immediately forward of the
craft of the character indicated above which includes
?oor portion 36, and preferably extends forwardly there
simpler, more effective, and more easily operated valved
from for about one-third of the length of the bottom 26.
by-pass means, both for controlling the supply of water to 25 The scoop 40 is on the longitudinal centerline of the hull
the jet to determine the water-speed of the hull, and for
bottom 26, and comprises parallelly spaced side walls 42
cleaning the screen of the water intake of the scoop.
A still further object of the invention is the provision of
a craft of the character indicated above which has simpler,
which are spaced at a distance from each other which
is less than the distances between the related sides 18 of
a craft of the character indicated above, of more efficient
which, in forward travel of the hull 16 in the water, serves
the hull. The scoop 40 has a flat top wall 44 which is
more e?icient, and more easily operated tension adjustable 30 angled upwardly and rearwardly, preferably at an acute
steering means for directionally rotating the jet, for steer
angle, and terminates, at its rear end, in a relatively short
ing and maneuvering the hull.
combined intake and hull elevating plate 46, which is
Yet another object of the invention is the provision in
disposed at an angle of about 45° to the horizontal, and
and better water-sealed thrust bearing mounting of the 35 to elevate the rear end of the hull 16 in the water and
rotatable tube of the water jet, the components of which
are easily disassembled and replaced when necessary.
relieve some of the subsiding tendency of the rear end
of the hull produced by the weight of the power plant.
As shown in FIGURE 4, the plate 46 has a lower end,
which merges into the forward end of the portion of the
main bottom portion 28 which intervenes between the
plate 46 and the kick-up 30, and the plate 46 is formed,
adjacent its lower end, with a water intake opening 48, of
relatively large diameter, and also with a smaller diameter
opening 50, through which extends the lower end of an en~
Other important objects and advantageous features of
the invention will be apparent from the following descrip
tion and the accompanying drawings, wherein, for pur
poses of illustration only, a speci?c form of the invention
is set forth in detail.
In the drawings:
FIGURE 1 is a perspective view of a water craft of
45 gine cooling system water intake pipe 52. A screen 54 ex
the present invention;
tends across the scoop 40 and is spaced forwardly from
FIGURE 2 is an enlarged vertical longitudinal section
taken on the line 2—2 of FIGURE 1;
FIGURE 3 is a horizontal section taken on the line
the plate 46, and comprises a downwardly and rearward
ly angled main portion 56, and a relatively short hori
zontal portion 58, which reaches to the lower end of the
_
FIGURE 4 is a further enlarged, fragmentary vertical 50 plate 46. Entering a side wall 42 of the scoop 40, be?
neath the meeting of the scoop top wall 44 and the plate
longitudinal section taken on the line 4-4 of FIGURE. 3;
FIGURE 5 is a fragmentary horizontal section, partly ' ~ 46, is the lower end 62 of a water return or by-pass pipe
60. Water driven by the pump of the power plant and en~
broken away, taken on the line 5~——5 of FIGURE 4;
tering the scoop 40 from the'by-pass pipe 60, and passing
‘FIGURE 6 is a fragmentary vertical transverse section
3——3 of FIGURE 2;
taken on the line 6—-6 of FIGURE 4;
55 across the screen 54, operates to clear the screen portion
56 of obstructive material, while the horizontal screen
FIGURE 7 is a‘ further enlarged fragmentary vertical
longitudinal section taken on the line 7-7 of FIGURE 3; '
FIGURES 8, 9 and 10 are fragmentary horizontal sec
tions taken on the lines 8—8, 9-_9, and 10-10, respec
tively, of FIGURE 7;
FIGURE 11 is a fragmentary perspective view of the
by-pass valve and its operating lever;
portion 58 is unaffected by the water'issuing from the
vby-pass pipe, and is free to provide passage of water to
the engine cooling system intake pipe 52.
60 ’ The power plant, generally designated 64, comprises
a suitable engine, preferably an internal combustion
engine (not shown) which is enclosed within a housing
66, and is supported upon the rear ?oor portion 36 and
is spaced from the hull sides 18. The engine has a cool
ing system, not shown, to which the water intake pipe 52
is connected, and a water outlet pipe 67 which extends
rearwardly through the transom 24, as shown in FIG
URE, 3. A muffler tail pipe 69 leads from the engine
housing through the transom. An enclosed gear or belt
train 68, on one end of the engine housing 66, extends
merals designate like parts throughout the several views, 70 forwardly therefrom and has driving connection with the
the invention is herein illustrated as involving a pleasure
related end of a transverse pump shaft 70, which is jour:
FIGURE 12 is a vertical section taken on the line 12—
12 of FIGURE 11, showing the core of the by-pass valve
positioned to direct water only to the jet; and,
FIGURE 13 is a View like FIGURE 12, showing the
valve cone positioned to by-pass water only to the return
pipe to the scoop.
Referring in detail to the drawings, wherein like nu~
3,020,872
3
nalled in spaced bearings 72, upstanding from the hull
?oor rear portion 36. A rotary water pump 73 is
mounted, as indicated at 74, upon the rear floor portion
33, in line with and close to the rear end of the scoop
40. In line with the pump shaft 70, a water outlet pipe
76 extends from the opposite side of the pump 73, and
4
the power plant, which extends forwardly from the tran
som and between the hull sides 18, at the upper edges
thereof, which is provided with a forwardly opening air
scoop 159 over a spring 161, whereby cooling air is cir
culated around the engine housing 66 and can provide, in
the case of an internal engine, in the housing, some super~
body 73 has right angularly spaced ports 82 and 84, re
charging for its carburetor (not shown).
As shown in FIGURES 2, 3 and 7 to 10, the jet as
sembly 156 comprises a support plate 158 which is a cen
relationship.
by means of a set screw 236, traversing the tube side
enters one end of the body 78 of a by-pass valve 80.
As shown in FIGURES 11 to 13, the ‘by-pass valve
spectively, which open radially to a blind bore 36 contain 10 tral forwardly extending part of a transversely elongated
brace plate 162 which extends ‘along and is ?xed to the
ing a rotary hollow core 88 having a single sidewall
transom 24, and at its ends, to the hull sides 18, and is
opening 90, which is optionally registrable with either
supported, at its forward end, by a prop 164 rising from
of the ports 82 and 84, by rotation of a shaft 92, which
the rear hull ?oor portion 32.
is connected to the core, and has a radial operating lever
The jet assembly 156 further comprises an upper cup
94 thereon, outside of the body 78. When the core
shapcd bearing housing 166, which is secured in place
opening 90 is registered with the port 82 water passes
upon the support plate 1558, ‘around an opening 167
from the pump 72, through a water supply pipe 96 to the
in ‘the latter, as by means of bolts 16%. Seated in the
hull propelling jet assembly, but when the core open
housing 166 is the lower race 170 of a radial thrust
ing 90 is registered with the port 84, all of the water from
ball bearing 172, which has an upper race 174 which
the pump passes to the by-pass or return pipe 60, into the
encircles and is ?xed to a vertical rotary tube 176 which
scoop 40. In intermediate positions of the valve core 88
extends through the bearing 172. A washer 173 over
?ow of water to both the supply pipe 96 and the by-pass
lies the upper race 174 and is overlaid by a pulley wheel
pipe is cut off, or is proportioned therebetween, so that
130, which is hinged to the rotary tube 176, as indicated
the jet assembly is supplied with water at a reduced rate
at 182. Above the pulley wheel, the tube 176 has an
and pressure, which results in slower travel of the hull
externally threaded upper end 184 which is threaded
16 in water.
into an opening 186 in the bottom of a cup-shaped up
Control of the by-pass valve operating lever 94 is
per packing gland housing 188. The housing 188 is
provided, as shown in FIGURES 3 and 4, by a cable 98
?xed against rotation, as by means of a radial set screw
which extends along the hull side 18, adjacent to the by
pass valve 80, and is trained between spaced rear guide 30 19% bearing against the upper part of the tube 176.
Packing rings 192 are engaged in the housing 188 and
pulleys 100, and 102, an intermediate pulley 104, and a
are compressed downwardly by a gland 194, engaged
forward pulley 106, are mounted on its hull side, and, at
in the upper end of the housing 188 and having lateral
its forward end, extends laterally inwardly and is passed
ears 196 which are traversed by vertical screws 193
around a guide pulley 108, upstanding from the hull ?oor
which are threaded into the upper end of the sidewall
34, and terminates in a contractile take-up spring 110
of the housing 188. The bend of the jet water supply
which is secured, at its rear end, to an upper part of an
pipe 96 provides a vertical lower portion 200 which
upstanding foot lever 112 which is pivoted, at its lower
extends down through the packing rings 192 and has
end, on the ?oor 34, behind the pulley 108, as indicated
a running ?t in the upper end of the rotary tube 176.
at 114. A lever return spring 116 is stretched between a
lower part of the lever 112 and a floor bracket 113 posi 40
Fixed, as by weldings 202, upon the rear hull ?oor
portion 32, is a lower cup-shaped packing gland housing
tioned forwardly of the lever. At its rear end, the cable
204, whose bottom 206 is formed with a central verti
98 is connected, as indicated at 120, in FIGURE 11, to
cal bore 208 which conformably and tightly receives
the upper end of the operating lever 94, and a contractile
cable tensioning spring 122 is connected, at its forward
the skirt 210 of a lateral thrust bearing 212, having a
end, to the lever 94, and, at its rear end, is adjustably 45 ?ange 214, on its upper end, which bears upon and is
connected to a bracket 124 on the hull side. As shown
secured to the housing bottom 206, as by means of
in FIGURES 2 and 3, a ratchet dog 126 on the upper
screws 216. The lower end portion of the rotary tube
end of the lever 112 is engaged with an arcuate ratchet
176 extends through the bearing skirt 210 and into an
bar 128 for holding the lever in adjusted positions. The
opening 218, provided in the hull bottom portion 32.
ratchet bar 128 is ?xed on the side of a vertical longi 50 Packing rings 220 are engaged in the housing 204,
tudinal partition wall 130, rising from the hull ?oor 34
around the tube 176, and are downwardly compressed by
beneath the rear part of a forward hull deck 132, and
a tubular gland 222, engaged in the upper end of the
supporting a forwardly declining transverse plate 134,
housing 204 ‘and having lateral ears 224, traversed by
which is joined, at its rear end to an upstanding in
vertical screws 226, threaded into the upper end of the
strument panel 136 which reaches to the deck 132. A 55 housing.
steering shaft 138 extends forwardly through the in
A short vertical external groove 228 is formed in the
strument panel 136 and is joumalled through spaced
sidewall of the rotary tube 176 and opens to the lower
brackets 139 and 140, rising from the plate 134. The
end thereof, and, at its upper end, opens to a radial
steering shaft 138 has a steering wheel 142 on its rear
port 230 in the sidewall, whereby water passing through
end. It is to be noted that, because of the transverse 60 the tube 176 can reach and lubricate the space between
arrangement of the engine and the engine housing 66,
the tube 176 and the bearing skirt 210.
and its location on the rear end of the hull 16, above the
The jet assembly 156 further comprises a tubular el
transom 24, that a maximum of usable space is afforded
bow 232, having a reduced neck 234 on its upper end,
in the hull 16, between the power plant and the instru
having a port 235, registered with the port 230 which is
ment panel 136, in which transverse seats 144 can be
65 threaded upwardly into the lower end of the rotary tube
placed on the ?oor 34, in generally longitudinally spaced
176, and is locked against rotation relative thereto, as
As shown in FIGURE 3, the jet water supply pipe 96
extends rearwardly from the by-pass valve 80 and is
wall and engaged with the neck. The horizontal arm
238 of the elbow 232 terminates in a threaded socket
supported, intermediate its ends or spaced transverse cross 70 240, which is larger in diameter than the bore 242 of
bars 148 and 150, extending between the hull sides 78, to
which the supply pipe is secured, as by means of straps
152. The supply pipe 96 has a downward bend 154, on
its rear end, which is connected to the jet assembly, gen
erally described 156. A. hood 157 can be provided over
the elbow.
A relatively short tubular jet nozzle 244
has a reduced neck 246 which is threaded into the socket
24-9, with a shoulder 248 bearing against the outer end
of the socket, and with a set screw 250 threaded through
the sidewall of the socket and engaged with the neck
3,020,872
246. ‘The bore 252 of the nozzle 244 is preferably ?ared,
from its inner end to its outer end, the inner end
of the bore 252 being the same in diameter as the elbow
bore 242. The foregoing arrangement provides for 360°
half in the peripheral wall 348, as shown in FIGURE 6.
Fixed to and circumferentially spaced around the ring
350 are notched spiral blades 352, which, when the rotor’
334 is rotated, pulls water into the pump housing 300
rotation of the jet nozzle 244, through application of
rotating force to the pulley wheel 180.
Suitable rotating means for the jet nozzle, pulley wheel
through the inlet pipe 322, and draws the water through
an axial discharge opening 354, provided in the web 356
of the housing section 304, in which the related end of
180 can comprise an endless belt 254 which is trained
the water supply pipe 96 is threaded. A vent pipe 358
around the pulley wheel 180, and has horizontal longi=
for the pump housing enters the top of the section 302
tudinal ?ights 256 which extend along the inner sur 10 and extends rearwardly through the hull transom 24'.
faces of the hull sides 18, through tubular guides 258
In operation, with the engine running and driving the
secured to the sides 18. At the rear ends of the guides
25% the belt ?ights 256 are trained around rear guide
pump 73, and with the by-pass valve 80 adjusted to direct
water under pressure through the supply pipe 96 and the
jet assembly 156 to the jet nozzle 244, a jet of water issues
pulleys 26f), ?xed on the brace member 162, and, at
their forward ends, around forward guide pulley 262, 15 from the nozzle 244 and propels the hull in a direction
located forwardly of and spaced below the instrument
opposite to the movement of the water jet. Thus, if the
panel 136. The part 263 of the belt 254 intervening be
jet nozzle is entered rearwardly, straight forward travel
tween the forward ends of the ?ights 256, is trained
of the hull 16 through the water is produced. When the
around a pulley wheel 264, which, as shown in FIGURE
nozzle is directed straight forwardly, rearward or reverse
2, is ?xed on an upstanding shaft 266 ‘which is journalled 20 travel of the hull is produced. In similar manner, the
through a transverse support 268, extending between
hull 16 is steered to either side of straight forward travel,
the hull sides 18, and is seated, at its lower end, in a
by angling the nozzle laterally between its forward and
bearing 27%) on the hull ?oor.
Fixed on the upper end
of the shaft 266, above the pulley wheel 264, is a bevel
rear positions, to the side of the hull opposite to the direc
tion of turn desired.
'
pinion 272, which is in mesh with a bevel gear wheel 25
It is to be observed that the location of the jet elbow
274, ?xed on the forward end of the steering column.
and the jet nozzle 244 on an elevation spaced above the
For taking up any slack developing in the belt 254,
hull bottom 28, enables the hull to operate in shallow
an automatic, adjustable take up device 276 is provided,
water and to avoid injurious contact of the elbow and
which is ?xed on and extends rearwardly and horizon
nozzle with shoal bottoms. Further, this arrangement
tally from a standard 278 connected to the partition wall 30 enables the hull 16 to be pulled upon on beaches and
136. The device 276 comprises a reclining U-shaped
banks without injury to the nozzle and elbow.
yoke 280 having spaced legs 282 and a bight portion
It will also be observed that the components of the
284, through which an adjusting screw 286 is journalled.
power plant as well as those of the jet assembly 156, are
A stop collar 288, ?xed on the screw 286, bears against
easily disassembled and replaced, when desired, and are
the bight portion 284. A runner 288 is threaded on the 35 of such simple construction that they can be readily
screw 286 and has secured thereto the rear end of a
manufactured at relatively low cost.
contractile coil spring 290, whose forward end extends
' Although there has been shown and described herein
through an opening 292 in the standard 278, and is
a preferred form of the invention, it is to be understood
secured to a clevis 234, carrying an idler pulley 296,
that the invention is not necessarily con?ned thereto, and
which bears rearwardly against the intervening port
that any change or changes in the structure of and in the
263 of the belt 254. Rotation of the screw 286, by means
relative arrangements of components thereof are contem
of a knob 298, provided on its rear end, in opposite
plated as being within the scope of the invention as de
directions produces tightening and loosening of the belt
?ned by the claims appended hereto.
'
254.
What is claimed is:
As shown in FIGURES 4 to’ 6, the rotary pump 73 45
1. In combination, a water craft having a hull, said
preferably comprises a closed cylindrical housing 300,
hull having a bottom, upstanding sides, a transom, and a
composed of separable pan-shaped sections 302 and 394,
stem, said bottom comprising a main ?at horizontal por
having peripheral ?anges 366, secured together, as by
tion, said main portion terminating at its rear end in a
means of bolts 308 extending therethrough. The hous;
kick-up spaced forwardly from the transom, said ‘bottom
ing section 302 is provided, on its web 310, with an v50 having a rear portion behind said kick-up into which said
external central packing housing 312, which spacedly
kick-up merges, said bottom being indented to provide
a centered longitudinally elongated water scoop spaced
forwardly from said kick-up, said water scoop having
surround the shaft 70 and are compressed in the housing
parallel side walls, and a rearwardly inclined top wall,
by a gland 320 threaded thereinto. At one side thereof .55 ‘said top wall terminating at its rear end in a rearwardly
the pump housing section 302 is provided with a tangen- " ' .and downwardlyhull elevating plate, a power plant
tial intake pipe 322 which is registered with the water
vmounted on the hull behind the scoop and having a pump
‘outlet opening 48 in the scoop elevating plate 46, the
having a water intake pipe opening through said elevating
end of the pipe 322 being provided with a lateral ?ange
plate, said pump having a water supply pipe leading there
surrounds a shaft spring 314, through which extends
the above mentioned pump shaft 70. Packing rings 318
324, which is secured to the plate 46, as by means of
’ bolts 326.
Fixed on a reduced extension 328 of the pump shaft ‘70,
as by means of a nut 330 and a washer 332, is a circular
pump impeller rotor 334, which has a running ?t in a
from, and a water jet assembly mounted on the hull and ‘
having a vertical rotary tube to which said supply pipe
is connected, said rotary tube having a lower end locat
ed in an opening in said rear bottom portion, an elbow
‘having a vertical arm connected to the lower end of the
circular wear ring 336, which is peripherally engaged 65 tube and a horizontal arm terminating in a water jet
Rota- ' ' nozzle, and steering means mounted in the hull and
tion of the wear ring in the section 302 is prevented by
operatively connected to said rotary tube.
'
.
with the sidewall 338 of the housing section 302.
,a lock screw 340 threaded in a bore 342, one-half of
which is in the ring 336 and the other half in the section
‘sidewall 338. The rotor 334 comprises a ?at cylindrical ‘
cup-shaped member 344 having a tubular hub 346 cu
gaged on the shaft extension 328 and having a peripheral
vwall 348, on which is circumposed an annular impeller
blade ring 350. A lock screw 352 is threaded in a bore
2. In combination, a water craft having a hull, said
hull having a bottom, upstanding sides, a transom, and a
stem, said bottom comprising a main ?at horizontal por
tion, said main portion terminating at its rear end in a
kick-up spaced forwardly from the transom, said bottom
having a rear portion behind said kick-up into which
said kick-up merges, said bottom being indented to pro
354, one-half of which is in the ring 350 and the other 75 vide a centered longitudinally elongated water scoop
8,020,872
‘2'
V ,
spaced forwardly from said kick-up, said water scoop
having parallel side walls, and a rearwardly inclined top
wall, said top wall terminating at its rear end in a rear
wardly and downwardly hull elevating plate, a power
plant mounted on the hull behind the scoop and having
a pump having a water intake pipe opening through said
8
pipe, a by-pass valve connected between the discharge
pipe and the water supply pipe and intervening between
said water supply pipe and the pump, said by-pass valve
having a water return pipe leading therefrom and enter
ing the water scoop in front of said elevating pipe, said
bypass valve comprising a body having ports severally
opening to the return pipe and the supply pipe, and mova
ble core means for closing both ports, at one time, open
elevating plate, said pump having a water supply pipe
leading therefrom, and a water jet assembly mounted on
ing one port and closing the other, and partially opening
the hull and having a vertical rotary tube to which said
ports, and control means for said valve core means,
supply pipe is connected, said rotary tube having a lower 10 both
comprising a cable leading forwardly along a hull side
end located in an opening in said rear bottom portion,
from said bypass valve core means, and a lockable ad
justing lever mounted in a forward part of the hull to
which the cable is connected.
water jet nozzle, and steering means mounted in the hull
5. In combination, a water craft having a hull, said hull
15
and operatively connected to said rotary tube, and a
having a bottom, upstanding sides, a transom, and a
screen extending across the water scoop and spaced for
stem, said bottom comprising a main flat horizontal por
wardly from the elevating plate, said screen having a
tion, said main portion terminating at its rear end in
forwardly inclined portion and a horizontal portion at
an elbow having a vertical arm connected to the lower
end of the tube and a horizontal arm terminating in a
a kick-up spaced forwardly from the transom, said bottom
the lower end of said inclined portion and extending rear
20 having a rear portion behind said kick-up into which said
wardly to the lower end of the plate.
kick-up merges, said bottom being indented to provide a
3. In combination, a water craft having a hull, said
centered longitudinally elongated water scoop spaced for
hull having a bottom, upstanding sides, a transom, and a
wardly from said kick-up, said water scoop having par
stem, said bottom comprising a main ?at horizontal por
allel side walls, and a rearwardly inclined top wall, said
tion, said main portion terminating at its rear end in a
top Wall terminating at its rear end in a rearwardly and
kick-up spaced forwardly from the transom, said bottom 25 downwardly hull elevating plate, a power plant mounted
having a rear portion behind said kick-up into which said
kick-up merges, said bottom being indented to provide a
centered longitudinally elongated water scoop spaced for
wardly from said kick-up, said water scoop having parallel
side walls, and a rearwardly inclined top wall, said top
wall terminating at its rear end in a rearwardly and down
wardly hull elevating plate, a power plant mounted on the
hull behind the scoop and having a pump having a Water
intake pipe opening through said elevating plate, said
pump having a water supply pipe leading therefrom, and
a water jet assembly mounted on the hull and having a
vertical rotary tube to which said supply pipe is connected,
said rotary tube having a lower end located in an opening
in said rear bottom portion, an elbow having a vertical
arm connected to the lower end of the tube and a hori
zontal arm terminating in a water jet nozzle, and steering
means mounted in the hull and operatively connected to
on the hull behind the scoop and having a pump having
a water intake pipe opening through said elevating plate,
said pump having a water supply pipe leading therefrom,
and a water jet assembly mounted on the hull and having
a vertical rotary tube to which said supply pipe is con
nected, said rotary tube having a lower end located in an
opening in said rear bottom portion, an elbow having a
vertical arm connected to the lower end of the tube and
a horizontal arm terminating in a water jet nozzle, and
steering means mounted in the hull and operatively con
nected to said rotary tube, said steering means compris
ing a steering wheel having a steering shaft journalled in
a forward part of the hull, a pulley wheel operatively
connected to said steering shaft, an endless belt trained
around said pulley wheel and having ?ights extending rear
wardly along the hull sides, guides on the hull sides
through which said ?ights extend, rear guide pulleys on
said rotary tube, said pump having a discharge pipe, a by
the hull sides near the transom, over which said ?ights are
pass valve connected between the discharge pipe and the
trained, the rotary tube of the jet assembly having a ?xed
water supply pipe and intervening between said water sup 45 pulley wheel thereon, the part of the belt between said
ply pipe and the pump, said by-pass valve having a water
rear guide pulleys being trained around the pulley wheel
return pipe leading therefrom and entering the water
on the rotary tube.
scoop in front of said elevating pipe, said by-pass valve
6. In combination, a water craft having a hull, said
comprising a body having ports severally opening to the
hull having a bottom, upstanding sides, a transom, and
return pipe and the supply pipe, and movable core means 50 a stem, said bottom comprising a main ?at horizontal
for closing both ports, at one time, opening one port and
portion, said main portion terminating at its rear end in a
closing the other, and partially opening both ports.
kick-up spaced forwardly from the transom, said bottom
4. In combination, a water craft having a hull, said hull
having a rear portion behind said kick-up into which said
having a bottom, upstanding sides, a transom, and a
kick-up merges, said bottom being indented to provide a
stem, said bottom comprising a main ?at horizontal por 55 centered longitudinally elongated water scoop spaced for
tion, said main portion terminating at its rear end in
wardly from said kick-up, said water scoop having parallel
a kick-up spaced forwardly from the transom, said bottom
side walls, and a rearwardly inclined top wall, said top
having a rear portion behind said kick-up into which said
wall termintaing at its rear end in a rearwardly and
kick-up merges, said bottom being indented to provide a
downwardly hull elevating plate, a power plant mounted
centered longitudinally elongated water scoop spaced for 60 on the hull behind the scoop and having a pump having
wardly from said kick-up, said water scoop having par
a water intake pipe opening through said elevating plate,
allel side walls, and a rearwardly inclined top wall, said
said pump having a water supply pipe leading therefrom,
top wall terminating at its rear end in a rearwardly and
and a water jet assembly mounted on the hull and having
a vertical rotary tube to which said supply pipe is con
on the hull behind the scoop and having a pump having 65 nected, said rotary tube having a lower end located in
a water intake pipe opening through said elevating plate,
an opening in said rear bottom portion, an elbow having
said pump having a water supply pipe leading therefrom,
a vertical arm connected to the lower end of the tube and
and a water jet assembly mounted on the hull and having
a horizontal arm terminating in a water jet nozzle, and
a vertical rotary tube to which said supply pipe is con
steering means mounted in the hull and operatively con
nected, said rotary tube having a lower end located in an 70 nected to said rotary tube, said pump being a rotary pump
opening in said rear bottom portion, an elbow having a
having a housing, and a vent pipe leading rearwardly
vertical arm connected to the lower end of the tube and
from said housing through the hull transom.
a horizontal arm terminating in a water jet nozzle, and
7. In combination, a water craft having a hull, said
steering means mounted in the hull and operatively con
hull having a bottom, upstanding sides, a transom, and
nected to said rotary tube, said pump having a discharge 75 a stem, said bottom comprising a main ?at horizontal
downwardly hull elevating plate, a power plant mounted
3,020,872
portion, said main portion terminating at its rear end in
a kick-up spaced forwardly from the transom, said bottom
having a rear portion behind said kick-up into which said
kick-up merges, said bottom being indented to provide
a centered longitudinaly elongated water scoop spaced
forwardly from said kick-up, said water scoop having
parallel side walls, and a rearwardly inclined top wall,
said top wall terminating at its rear end in a rearwardly and
downwardly hull elevating plate, a power plant mounted
on the hull behind the scoop and having a pump having 10
tail pipe leading rearwardly through the hull transom and
having a cooling system, said cooling system comprising
a water inlet pipe opening through the elevating plate of
the water scoop and a discharge pipe leading rearwardly
through the hull transom, and a cowl extending forwardly
from the hull transom and between the hull sides and
over the power plant, said cowl having an opening, and a
forwardly opening wind scoop on said cowl registered
with said opening.
10. In combination, a water craft having a hull, said
a water intake pipe opening through said elevating plate,
said pump having a water supply pipe leading therefrom,
hull having a bottom, upstanding sides, a transom, and a
stem, said bottom comprising a main ?at horizontal por
and a water jet assembly mounted on the hull and having
tion, said main portion terminating at its rear end in a
a vertical rotary tube to which said supply pipe is con
kick-up spaced forwardly from the transom, said bottom
nected, said rotary tube having a lower end located in 15 having a rear portion behind said kick-up into which said
an opening in said rear bottom portion, an elbow having
kick-up merges, said bottom being indented to provide a
a vertical arm connected to the lower end of the tube and
centered longitudinally elongated water scoop spaced for
wardly from said kick-up, said water scoop having parallel
a horizontal arm terminating in a water jet nozzle, and
steering means mounted in the hull and operatively con
side walls, and a rearwardly inclined top wall, said top
nected to said rotary tube, said power plant comprising an 20 wall terminating at its rear end in a rearwardly and down
internal combustion engine having a mu?ler tail pipe
wardly hull elevating plate, a power plant mounted on the
leading rearwardly through the hull transom and having
hull behind the scoop and having a pump having a water
a cooling system, said cooling system comprising a water
intake pipe opening through said elevating plate, said
inlet pipe opening through the elevating plate of the water
pump having a water supply pipe leading therefrom, and
scoop and a discharge pipe leading rearwardly through 25 a water jet assembly mounted on the hull and having a
the hull transom.
vertical rotary tube to which said supply pipe is connected,
said rotary tube having a lower end located in an opening
8. In combination, a water craft- having a hull, said
in said rear bottom portion, an elbow having a vertical
hull having a bottom, upstanding sides, a transom, and a
arm connected to the lower end of the tube and a hori
stem, said bottom comprising a main ?at horizontal por
tion, said main portion terminating at its rear end in a 30 zontal arm terminating in a water jet nozzle, and steering
kick-up spaced forwardly from the transom, said bottom
having a rear portion behind said kick-up into which said
kick-up merges, said bottom being indented to provide a
centered longitudinally elongated water scoop spaced for
wardly from said kick-up, said water scoop having parallel
side walls, and a rearwardly inclined top wall, said top
meansvmounted in the hull and operatively connected to
said rotary tube, said jet assembly having a lower packing
gland housing resting upon and ?xed to said rear bottom
portionaround an opening provided therein, said gland
housing having a vertical bore containing a lower tubular
thrust bearing through which the rotary tube is journalled,
a horizontal support plate mounted in the hull and spaced
above said rear bottom portion, said support plate having
an opening passing the rotary tube, an upper bearing ?xed
on the hull behind the scoop and having a pump having
a water intake pipe opening through said elevating plate, 40 to said support plate around its opening, a pulley wheel
?xed on the rotary tube above and bearing upon said
said pump having a water supply pipe leading therefrom,
upper bearing, and an upper tubular packing gland hous
and a water jet assembly mounted on the hull and having
ing having a bottom provided with an opening, means ?x
a vertical rotary tube to which said supply pipe is con
ing the housing about the opening in the support plate,
nected, said rotary tube having a lower end located in an
opening in said rear bottom portion, an elbow having a 45 and packings compressed in said upper and lower gland
housings around the rotary tube.
vertical arm connected to the lower end of the tube and
a horizontal arm terminating in a water jet nozzle, and
11. In combination, a water craft having a hull, said
steering means mounted in the hull and operatively con
hull having a bottom, upstanding sides, a transom, and
a stem, said bottom comprising a main ?at horizontal
nected to said rotary tube, said jet nozzle and elbow being
located behind said kick-up on a level above the hull 50 portion, said main portion terminating at its rear end in
bottom.
a kick~up spaced forwardly from the transom, said bot
tom having a rear portion behind said kick-up into
9. In combination, a water craft having a hull, said
wall terminating at its rear end in a rearwardly and
downwardly hull elevating plate, a power plant mounted
hull having a bottom, upstanding sides, a transom, and
which said kick-up merges, said bottom being indented
to provide a centered longitudinally elongated water
a stem, said bottom comprising a main ?at horizontal
portion, said main portion terminating at its rear end 55 scoop spaced forwardly from said kick-up, said water
in a kick-up spaced forwardly from the transom, said
bottom having a rear portion behind said kick-up into
which said kick-up merges, said bottom being indented
scoop having parallel side walls, and a rearwardly in»
clined top wall, said top wall terminating at its rear end
in a rearwardly and downwardly hull elevating plate, a
to provide a centered longitudinally elongated water
power plant mounted on the hull behind the scoop and
having a pump having a water intake pipe opening
scoop spaced forwardly from said kick-up, said water
scoop having parallel side walls, and a rearwardly in
clined top wall, said top wall terminating at its rear end
in a rearwardly and downwardly hull elevating plate, a
through said elevating plate, said pump having a water
supply pipe leading therefrom, and a water jet assembly
mounted on the hull and having a vertical rotary tube
to which said supply pipe is connected, said rotary tube
having a pump having a water intake pipe opening through 65 having a lower end located in an opening in said rear
bottom portion, an elbow having a vertical arm con
said elevating plate, said pump having a water supply pipe
nected to the lower end of the tube and a horizontal
leading therefrom, and a water jet assembly mounted on
arm terminating in a water jet nozzle, and steering means
the hull and having a vertical rotary tube to which said
mounted in the hull and operatively connected to said
supply pipe is connected, said rotary tube having a lower
end located in an opening in said rear bottom portion, an 70 rotary tube, said pump being a rotary pump having a
housing, and a vent pipe leading rearwardly from said
elbow having a vertical arm connected to the lower end
of the tube and a horizontal arm terminating in a water
housing through the hull transom, said rotary pump com
prising a cylindrical housing composed of opposed and
jet nozzle, and steering means mounted in the hull and
operatively connected to said rotary tube, said power plant
connected ?rst and‘ second sections, said sections befng
comprising an internal combustion engine having a mu?ler 75 pan-shaped and having webs and peripheral walls, a pump
power plant mounted on the hull behind the scoop and
11
shaft journalled through the web of the ?rst section and
12
housing composed of opposed and connected ?rst‘ and
second sections, each of said sections having a pan-shape
and having webs and peripheral walls, a pump shaft
journalled through the web of the ?rst section and carry
ing an impeller rotor in said ?rst section, a wear ring
connected to the peripheral wall of said ?rst section in
which the rotor runs, said water intake pipe entering the
?rst section through its peripheral well, said water sup
ply pipe including a water discharge pipe leading from
12. In combination, a water craft having a hull, said
hull having a bottom, upstanding sides, a transom, and a It) .an axial opening and pivoted in the web of the second
pump housing section, said rotor comprising a circular
stem, said bottom comprising a main ?at horizontal por
cup~shaped member having a tubular hub securing and
tion, said main portion terminating at its rear end in a
, secured to the pump shaft, said member having a periph
kick-up spaced forwardly from the transom, said bottom
eral wall, an impeller ring circumposed on and secured
having a rear portion behind said kick-up into which said
to the peripheral Wall of the member, and circumferen
kick-up merges, said bottom being indented to provide
tially spaced spiral blades on and extending outwardly
a centered longitudinally elongated water scoop spaced
from said impeller ring, said blades having edges run
forwardly from said kick-up, said water scoop having
ning against the wear ring.
parallel side walls, and a rearwardly inclined top wall,
carrying an impeller rotor in said ?rst section, a wear
ring connected to the peripheral wall of said ?rst section
in which the rotor runs, said Water intalte p‘pe‘ entering
the ?rst section through its peripheral wall, said water
supply pipe including a Water discharge pipe leading
from an axial opening and pivoted in the web of the
second pump housing section.
said top wall terminating at its rear end in a rearwardly
13. In combination, a water craft including a hull
and downwardly hull elevating plate, a power plant 20 having a bottom comprising a main ?at horizontal por
mounted on the hull behind the scoop and havlng a
pump having a water intake pipe opening through said
elevating plate, said pump having a water supply pipe
leading therefrom, and a water jet assembly mounted on
the hull and having a vertical rotary tube to which said
supply pipe is connected, said rotary tube having a lower
end located in an opening in said rear bottom portion,
an elbow having a vertical arm connected to the lower
end of the tube and a horizontal arm terminating in a
water jet nozzle, and steering means mounted in the 30
hull and operatively connected to said rotary tube, said
pump being a rotary pump having a housing, and a vent
pipe leading rearwardly from said housing through the
hull transom, said rotary pump comprising a cylindrical
tion terminating at its rear end in a kick-up and a rear
horfzontal portion behind said kick-up, there being in
said horizontal portion a centered longitudinally-elon
gated water scoop having a rearwardly~inclined top wall,
said top wall being provided with an intake opening, a
pump having an intake connected to said intake open
ing, a vertical rotary tube supported in the rear portion
of said bottom, a jet nozzle below said rear portion and
facing away from said kick-up and connected to said
tube, and steering means mounted in said hull and open.
tively connected to said rotary tube.
No references cited.
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