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Патент USA US3040541

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June 26, 1962
2 Sheets-Sheet 1
Filed Jan. 14, 1960
Fl 6
June 26, 1962
Filed Jan. 14, 1960
2 Sheets-Sheet 2
FIG. 3
5 I6/-
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W, M4441, MVLM‘QM
United States Patent 0 "ice
converging surface 16 of a member ‘17 ?xed within the
conduit, the stream leaving the boat at a point above the
water line.
Fixed to the conduit 11 by meansof bolts 20 is a hous
ing 21, one function of which is to contain a gate 22 which
is movable within a vertically extending opening 23 to
Richard L. Cochran, Indianapolis, Ind, assignor to The
Buchler Corporation, arcorporation of Indiana
Patented June 26, 1962
Filed Jan. 14, 1960, Ser. No‘. 2,487
1 Claim. (Cl. 60-3555)
various positions. When the gate 22 is in the intermedi
ate position shown in FIG. 4, the water in the conduit 11
is bottled up, and prevented from being exhausted from
The present invention relates to water or liquid jet
propelled boats and more vparticularly to a device for‘ >
steering and controlling the stability and operation of 10 the rear of the boat whereby the boat is caused to idle.
such a boat.
' The gate is movable upwardly to a position wherein the
gate is above the opening in the member \17 and the
stream of water moved through the conduit 11 by the tur
bine is free to be exhausted past the gate and from the
within a conduit passing through the boat. Water is
rear of the boat. The gate is also movable downwardly
drawn into the conduit through an intake opening at the
from the position of FIG. 4 'to a position wherein the
bottom of the boat, is pumped through the conduit by the
water from the turbine is de?ected in a direction for~
turbine and is exhaustedin a stream from the rear of
Wardly of the boat causing the boat to move rearwardly.
the boat, the stream leaving the boat above the water
The housing 21 is formed with a vertically extending
within which the boat is floating or is supported. The
propulsion principle depends directly on a basic law of 20 bore 25 within which is pivotally received a shaft 26.
Fixed to the lower end of the shaft by means of a pin 27
physics which provides that every action has an equal and
is a cylindrical conduit 30. The conduit 30 is also pivoted
opposite reaction.‘ Thus, as water is ejected astern, the
At least one form of water jet-propelled boat involves
an engine arranged to drive a turbine which is located
boat moves forward.
at its lower end to the housing 21 by means of a screw
31 threadedly ?xed to the conduit 30 and pivotally re
tion of such water jet~propelled boats is that of maintain 25 ceived through a bracket 32 ?xed to the housing 21 by
means of bolts 35 which pass through projections 36 ex
ing the proper stability and particularly the proper trim
tending from the housing 21.
of the boat. If the boat is heavily loaded at either the for
As can be seen from FIG. 4, the housing'21 is formed
ward or rearward end, the hull will tend to rotate about
with a cylindrical aperture 37 arranged in registry with
a transverse axis in the water causing either the bow or
the stern to ride low in the water. This effect, if unduly 30 the member 17. The cylindrical conduit 30 is also ar
ranged in registry with the member ‘17 so that the stream‘
great, will be inconvenient to the occupants of the boat
of water leaving the conduit is projected through the aper
and will interfere with the proper operation and with the
One problem present in the construction and opera- _
correct planing of the boat while in motion.
ture 37 and through the conduit'30.
jet-propelled boat. To accomplish this object, the pres
and is operatively associated with the steering wheel of
the boat. A bolt 45 is provided for ?xing the steering
line 43 with relation to the steering quadrant.
A rearwardly extending steering quadrant 40 is ?xed to
It is also highly desirable if not necessary that efficient
means be provided for steering the boat. Therefore, a 35 the shaft 26 by means of the pin 41. The steering quad
rant is formed with groves 42 adapted to receive a steer~
primary object of the present invention is to provide
ing rope or line 43 whichex-tends forwardly into the boat
means for steering and controlling the trim of a water
ent invention contemplates the provision of means for
setting and controlling the direction of the water stream
issuing from the boat, the invention acting according to
' A second cylindrical conduit 50 is pivotally mounted
upon the conduit 30 for pivoting about a horizontal axis,
the conduit 50 being secured to the conduit 30 by means
the above mentioned law of physics to change the direc
tion of and to trim the boat.
Related objects and advantages will become apparent as
the description proceeds.
In accordance with the present invention, there is pro
of screws 51 pivotally received within the conduit 30 and '
45 threadedly ?xed within the conduit 50. Suitable washers
52' are received about the screws 51 and between the
vided a water jet-propelled boat having a hull and a means
for propelling a stream of water from the hull. A tu
bular conduit is mounted on the hull so as to be pivotal
about a vertical axis and is positioned in sucha manner
that the stream of water passes through the conduit. A
second tubular conduit is mounted on the ?rst mentioned
conduit in registry therewith and so as to be pivotal about
a horizontal axis.
The full nature of the invention will be understood 55
from the accompanying drawings and the following de~
scription and claim.
conduits 30 and 50 for preventing binding of the con
duit 50.
A link 55 is pivotally secured to the top of the conduit
50 and extends upwardly through a slot 56 in the steering
quadrant 40, the slot ‘56 being arranged to extend axially
of the conduit 30. The link 55 has threaded thereon a
pair of nuts 57' which are positioned on opposite sides
of the steering quadrant 40.
In order to operate the present device, a stream of
water is caused to ?ow from the conduit 11 so as to
propel the boat. When the driver of the boat desires
to turn the boat, he turns the steering wheel which causes
having the steering and stability controlling device of the
the line 43 to pivot the conduit 30 about a vertical axis.
present invention mounted thereon.
Since the conduit 50 is mounted upon the conduit 30, it
FIG. 2 is a rear elevation of the device of FIG. 1.
also pivots about the vertical axis with the conduit 30.
FIG. 3 is a top plan view of the device of FIG. 1.
In this manner the stream of water passing through the
FIG. 4 is a vertical section taken along the line 4-4
conduits 30 and 50 is de?ected either leftwardly or right
‘ _ of FIG. 2 in the direction of the arrows.
wardly from the rear of the boat causing the rear of the
Referring now to the drawings, there is illustrated a 65 boat to move oppositely to such deflection and resulting
water jet-propelled boat 10 having a conduit 11 there
in the turning of the boat. For example, if the conduits
' through which opens into the steering and stabilizing de
30 and 50 are pivoted to the right as viewed in FIG. 3,
vice 12 mounted‘ upon the rear of the boat. Mounted
the stream of water will be de?ected to the right causing
Within the conduit 1-1 is a turbine 15 which functions to 70 the rear of the boat to move to the left and causing the
pump the water through the conduit ‘11 and from the rear
boat to turn to the right.
When a heavy load is placed either in the front or the
of the boat. The water is formed into a stream by the
FIG. 1 is a side elevation of a water jet-propelled boat
rear of the boat, the boat will be caused to ?oat with its
bow or stern, respectively, in a downward position. This
condition is inconvenient to the occupants of the boat
and may aifect the operation such as, for example, the
correct planing of the boat. In order to trim the boat,
the conduit 30 is adjusted by means of the nuts 57 so
that the stream of water passing through the conduits 30
and 50 is de?ected either downwardly or upwardly. For
example, if the heavy load is located in the rear of the
boat, the conduit 30 would be pivoted downwardly and the 10
nuts 57 adjusted upwardly on the link 55 so that the
link 55 will hold the conduit in a downward position.
When the water passes through the conduit 50, it will be
de?ected downwardly producing a moment which will tend
tending, vertically spaced coaxial bores therethroug'n, a
shaft pivotally received in said bores, a tubular conduit
?xed to said shaft and secured to said housing for pivot
ing about the axis of said bores, said conduit being posi
tioned in such a manner that the stream passes there
through, a second tubular conduit positioned in registry
with said ?rst conduit and extending rearwardly thereof,
horizontally extending members mounting said second
conduit upon said ?rst conduit for pivoting about a hori
zontal axis, a steering quadrant ?xed to said shaft centrally
thereof between said bores and extending rearwardly over
said second conduit, said quadrant having a groove in the
periphery thereof adapted to receive a steering line where
by said quadrant can be pivoted about the axis of said
to raise the rear of the boat and maintain it in a proper 15 bores, said quadrant having a central elongated rearwardly
operating position.
extending slot therein, a link mounted upon the upper
surface of said second conduit for pivoting about a hori
zontal transverse axis, said link having a threaded portion
From the above description, it will be obvious that the
present invention provides a novel device for steering and
controlling the trim of a water jet-propelled boat. It
extending upwardly through said slot, and a pair of nuts
can also be seen that the present invention provides a 20 threadedly received on said link on opposite sides of said
device which will accomplish the above functions e?iciently
and yet is simple, inexpensive and durable.
quadrant for ?xedly but adjustably spacing said second
'conduit and said quadrant whereby said second conduit
While the invention has been illustrated and described
can be tilted to de?ect the stream of water upwardly or
in detail in the drawings and foregoing description, the
same is to be considered as illustrative and not restrictive 25
in character, it being understood that only the preferred
embodiment has been shown and described and that all
changes and modi?cations that come within the spirit of
the invention and the scope of the claim are also desired
to be protected.
The invention claimed is:
A liquid jet-propelled boat comprising a hull, means for
References Cited in the ?le of this patent
Harley _______________ __ July 8, 1924
David ________________ _._. Jan. 5, 1960
propelling a stream of water from the rear of said hull
above the surface of the water sustaining said hull, a hous
ing ?xed to the hull and having a pair of vertically ex
Hemje ______________ __ Feb. 13, 1872
Giorannini ____________ __ May 10, 1910
Germany _____________ __ Oct. 18, 1954
Great Britain __________ __ Apr. 3, 1879
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