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Патент USA US3094976

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June 25, 1963
J. E. MEYER
3,094,966
SCREW-TYPE PROPULSION UNIT
Filed Dem 16, 1958
2 Sheets-Sheet 1
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Joseph E. Meyer
1NVENTOR.
June 25, 1963
3,094,966
J. E. MEYER
SCREW-TYPE PROPULSION UNIT
2 Sheets-Sheet 2
Filed Dec. 16. 1958
Fig.2
Fig.7
Joseph E. Meyer
INVENTOR.
BY
wi-SL.
3%
United States Patent 0 " 1C6
1
3,094,966
SCREW-TYPE PROPULSION UNIT
Joseph E. Meyer, Sparta, Wis, assignor of two thirty
?fths each to William H. Meyer, Martha Meyer, Her
bert Meyer, James Meyer, Beverly Meyer, Davis Meyer,
and Eugene Meyer, all of Athens, Wis.
Filed Dec. 16, 1958, Ser. No. 780,864
3,094,966
Patented June 25, 1963
2
pipe keeps the air bubbles compressed until they approach
the end of the discharge tube, and as they expand the
speed of the water leaving the discharge pipe is increased.
This will pump in reverse as well as forward by more
than one method of propelling the abutments mentioned
previously.
Further, the pump is primed by applying a suction to
the tube in the region of the screw, so that the propulsion
system may be set into operation practically at once in
This invention relates to propulsion systems and more 10 response to rotation of the propulsion screw in the tube.
particularly to a hydraulic propulsion system for a boat
These together with other objects and advantages which
or other water traveling device.
will become subsequently apparent reside in the details
An object of the invention is to provide a new propul
of construction and operation as more fully hereinafter
sion system for a boat to replace the conventional pro
described and claimed, reference being had to the accom
peller that is used on larger ships, boats and submarines. 15 panying drawings forming a part hereof, wherein like
Although the principles of the invention are applicable
numerals refer to like parts throughout, and in which:
principally in connection with ships, boats and the like,
FIGURE 1 is a side elevational view of the boat, parts
the invention has a broader application including those
broken away to show internal detail, the boat diagram
situations requiring liquid pumping, for instance in irri
matically representing one of the many environments
gation, as a booster for pipelines or in other systems
wherein the principles of the invention may be applied.
where large volumes of liquid must or should be moved.
FIGURE 2 is a top view of the boat in FIGURE 1.
When used as a substitute for the conventional boat
FIGURE 3 is an enlarged sectional view taken on the
propeller, there are no shear pins, no loss of the propeller
line 3—3 of FIGURE 1.
if the shaft breaks, and there ‘are numerous other advan
FIGURE 4 is a transverse sectional view taken on the
tages such as the ease with ‘which a system in accordance
line 4-4 of FIGURE 3.
9 Claims. (Cl. 115-15)
with this invention may be repaired from directly within
the boat and above the water line.
One of the features of the invention providing a dis
FIGURE 5 is a transverse sectional view taken on the
line 5—-5 of FIGURE 3.
FIGURE 6 is an enlarged sectional view taken on the
tinct improvement over other conventional and non-con
line 6~6 of FIGURE 1.
ventional systems is that there is a chopper for small 30
FIGURE 7 is a fragmentary enlarged view taken on
sticks, weeds, string, etc., the chopper cutting these ob
the line 7——7 of FIGURE 3.
jects into small harmless pieces before they enter the
FIGURE 8 is an enlarged fragmentary detail of con
pump chamber in this system. This is in distinction to
struction showing one manner of controlling the appli
screens and the like used at the forward part of a boat,
cation of suction to the jet tube in response to the liquid
because such screens become clogged materially reducing
level of the tube.
the et?cieney of a propulsion system.
In the accompanying drawings there is a boat 10 in
This propulsion system is capable of being operated to
which propulsion system 12 is installed. Although the
move large volumes of liquid at low speeds with very
propulsion system 12 is shown installed in boat 10, it is
small slippage. Further, this system is well adapted for
to be clearly understood that the invention is intended
directional control by adjusting the position of the after
to embrace other ?elds apart from boats and the like.
part of the jet tube whereas, conventional system ordi
System 12, separated from boat 10, is a pumping system
narily rely on rudders to achieve the same result.
for moving large quantities of water and may be used
The invention embodies a jet tube having an inlet and
not only in the several environments mentioned herein
an outlet, together with an anger screw located in the
previously but may be used in all other applications where
jet tube and adapted to be rotated by a conventional
it is desired to move large quantities of liquid, regardless
engine, motor or the like. The screw has cutter blades
of the nature of the liquid.
on its leading edge or has its leading edge formed as a
rotating cutter which coacts with a stationary cutter
System 12 has a jet tube 14 with a water intake 15 at
the bottom of the hull of boat 10, and a water discharge
18 at the aft of the boat. The liquid, Water in this in
harmless size pieces before entering the convolutions of 50 stance, is adapted to enter intake 16 and to be discharged
mounted in the jet tube. Accordingly, debris is cut into
the screw during normal and ordinary operation of the
hydraulic system.
As the screw rotates water is drawn from the inlet and
expelled through the outlet of the tube. In order to pre
vent this water from rotating with the screw, there are
retreating abutments located between the convolutions
of the screw to ‘block the rotational motion of the water,
enabling the water to travel practically wholly in an axial
direction with reference to the pump chamber and axis
of rotation of the screw. This increases the pumping
efficiency.
There are certain other features of this invention mak
ing it a more practical and e?icient system. For instance
through the discharge 18 in order to attain boat propul
sion.
There is an auger type screw 20 located in pump
chamber 22 formed between axially aligned sections of
the tube 14. The auger type screw is shown with three
convolutions, although the number of convolutions may
be increased or decreased in accordance with engineer
ing design. Regardless of the number of convolutions,
the screw is mounted on a typical shaft 24 with an end
bearing 26 carried by a part of casing 28 and an inter
mediate anti-ftiction bearing 30 carried by another part
of casing 28. The shaft, after passing through an open
ing in the down curved front part of tube ‘14, is con~
nectcd with a motor or engine 32, whereby torque is
there are one or more air inlet openings upstream of the
available for rotating the screw.
screw and ‘in the side wall of the jet tube, these preferably 65
Casing 28 is attached, for instance by bolts 34 to a
having a venturi forming structure connected with them.
side of tube 14. Slot 36 in tube 14, has the retreating
As the water rushes through the jet tube to enter the pump
abutments or walls 38 passed therethrou'gh. Each abut
chamber, the aspirator effect of the openings in the water
con?ning wall of the tube introduces air into the tube up
ment is made of a ?at vane and preferably has a friction
reducing roller 40 between its root and tip. The rollers
stream of the propulsion screw. The screw and pumping 70
40 are particularly advantageous when the retreating abut
chamber should be conical and the outlet pipe smaller in
ments are propelled in their constrained path of travel by
diameter than the intake pipe. The smaller discharge
the action of the screw 20 as it rotates. The rollers may
3,094,966
3
be retained when the retreating abutments are otherwise
operated or they may be omitted.
As seen in FIGURES 3 and 4, casing 28 is made of
two sections 44 and 46 that have ?anges bolted together
at 48.
As seen in FIGURE 3 a portion of the casing
?ts ?ush against the outer surface of tube 14, and it
is this portion which seals slot 36. Further, the con
4
in the region of the pump chamber. Engine suction or
a separate pump or any other source of vacuum may
be connected by vacuum line 110 with tube 14. Control
valve assembly 112 ‘is interposed between vacuum line 110
and tube 14. The assembly 112 is made of a ?oat valve
chamber 114 whose walls are attached to tube 14 over
aperture 116 in the tube 14. Float 118 is movably mount—
ed in chamber 114 and operates needle valve 120 mov
able toward and away from seat 122 in accordance with
fronting surfaces of sections 44 and 46 have oval cam
tracks 50 and 52 within which pins 54 and 56 on opposite
the liquid level in ?oat chamber 114. A spring closed
faces of each abutment 38, are located. This constrains 10 check valve 124 is located in the passageway 126 which
the travel of each abutment, and the movement of the
registers the ?oat chamber 114 with the suction line 110.
abutments is attained by endless conveyor chain 60 which
It is evident that upon application of a suction sufficient
is engaged with sprockets 62 and 64. The sprockets are
to open spring closed valve 124, the suction will be ap
keyed or otherwise attached to spindles ‘66 and 68, one
plied to the interior of tube 14 by drawing a vacuum
of which has a bevel gear 70 secured to its end. The
through aperture 116. This vacuum is cut-off as soon as
bevel gear is located in a gear case 72 (FIG. 5) attached
the liquid level in ?oat chamber 114 is sufficient to move
to section 46 and from which shaft 74 extends. A bevel
needle valve 120 against its seat 122.
gear 76 is secured to shaft 74 and is coupled to lay shaft
78 (\FIG. 1) by a universal joint 80. The lay shaft is
supported ‘by hearings on hearing brackets or hangers
and is driven by shaft 24 through gearing 82 attached to
shaft 24 and shaft 78 respectively. It is now evident
that rotation of screw 20 and retreating motion of the
abutments 38 are synchronized. The abutments 38,
being ?at, prevent the liquid that is moved by auger
The ‘foregoing is considered as illustrative only of the
principles of the invention. ‘Further, since numerous
modi?cations and changes will readily occur to those
skilled in the art, it is not desired to limit the invention
to the exact construction and operation shown and de
scribed, and accordingly all suitable ‘modi?cations and
equivalents may be resorted to, falling within the scope
screw 20 from rotating as it is displaced by the screw.
As the liquid enters intake 16 debris may enter with it,
of the invention as claimed.
Debris that is sufficiently buoyant to ?oat and any other
debris would would ordinarily enter tube 14 is capable
ing axially aligned liquid pump inlet and outlet passage
What is claimed as new is as follows:
1. A hydraulic pumping system comprising a tube hav
of being chopped ?ne enough so that only harmlessly
small pieces enter the pump chamber 22. Chopper 90,
therefore, is o-peratively connected with the auger. The
port portions, a pump chamber in said tube between said
inlet and said outlet passage portions, a drive shaft adapted
chopper is made of a movable blade 92 on the leading
edge of each convolution of the screw, and a stationary
cutter bar or stationary blade 94 attached in the tube
place liquid in said chamber and move the liquid through
said outlet portion, rotational ?ow blocking means driv
ingly connected to said drive shaft for separately powered
14. Stationary cutter bar 94 is shown extending radially
across one-half of the tube and secured at its end to the
hanger for hearing 30. As auger screw 20 rotates the
blades 92 thereon wipe across the edge of stationary blade
94 or move very close to the stationary blade to sever the ~
debris as it enters the pump chamber 22.
In order to increase the e?iciency of the pumping sys
tem, there are one or more, preferably a plurality, of
openings 98 in tube 14.
These are air inlet openings
around which there is an enclosing structure 100.
The I
structure 100 is composed of a housing extending up
wardly a distance so that the ?ap valves 102 are ‘adjust
ably carried by one wall thereof always above the water
line to control admission of air through inlet apertures
104. The housing embraces a part of the tube 14 or
‘may be made in some other way however, the interior
of the housing is in registry with openings 98 for the
admission of atmospheric air which passes through open
ings 104, to the interior of tube 14 upstream of the
to be driven from ‘a power source, a screw secured to
said shaft and rotatably mounted in said chamber to dis
movement through said pump chamber for restricting ?uid
?ow through said chamber to axial ?ow, said tube having
at least one air inlet opening upstream of said screw, air
passage control means communicating with said air inlet
opening for controllably admitting air to the tube for
compression by the screw and subsequent expansion, and
suction means connected to said tube upstream of said
screw to elevate the liquid level in said tube for initial
propulsion of incompressible liquid through said tube.
2. A hydraulic pumping system for a boat comprising
a jet tube to conduct liquid for propulsion of the boat
and having liquid intake and discharge ports, a pump
chamber in said tube between said ports, a drive shaft
adapted to be driven from a power source, a screw se
cured to said shaft and having a spiral blade rotatably
mounted within said chamber to displace liquid in said
chamber and move the liquid through said discharge port,
an abutment drivingly connected to said shaft for sepa
rately powered movement in an axial direction through
said pump chamber in timed relation to the spiral blade of
said screw to prevent the water being moved by said
screw from rotating with the rotary movement of said
screw, and friction reducing rolling means carried by said
carried with the water into the pumping chamber.
The screw and pumping chamber are conical so that 60 abutment and contacting said blade, and a chopper in said
tub-e upstream of said screw and operable simultaneously
the pump discharge portion of the tube 14 will have a
with rotation of said screw to chop debris prior to enter
smaller diameter than the pump inlet portion. The
ing said pump chamber.
smaller discharge portion would therefore compress the
3. A system for moving large volumes of liquid, said
air bubbles in the water until the bubbles approach the
system including a tube having axially aligned liquid
discharge 18 and expand to increase the speed of the
pump inlet and outlet passage portions, an auger screw
?uid mass leaving the discharge 18 and thereby provide
mounted for rotation in said tube between said inlet and
a propulsive boost. This will operate in both forward
outlet passage portions, means connected to said auger
and reverse direction. Further if the abutments are gear
screw for rotating said screw, and a retreating abutment
driven they will be as shown, but if otherwise operated
rollers ‘may be provided on both edges instead of only 70 in said tube and engaged between and axially movable
with the convolutions of said auger screw for preventing
one edge.
the liquid that it is being moved by said screw from sub
‘Further, in some instances it may be necessary to prime
stantial rotation with the auger screw, said moving abut
the pump so that it may be started quicker. Where the
ment
consisting essentially of a ‘plurality of vanes ex
water level of the pump is low in chamber 22, the level
tending radially across a portion of said tube within which
may be lifted by the application of a vacuum or suction
screw 20. Therefore, when water is ?owing past the
openings 98, a reduction in static pressure at such point
will induce a ?ow of air into the tube 14. Air which is
compressible as compared to water will therefore be
3,094,968
6
the screw is disposed and interdigitated between the con
sible ?uid through the flow passage means for introducing
compressible ?uid thereinto for compression in said cham
ber means and expansion through the discharge, and axial
?ow impelling means rotatably mounted Within said cham
volutions of said screw, means connected with said vanes
for constraining the movement of said vanes, said tube
having an air inlet near said screw, and means registered
with said tube adjacent to said screw for priming said
tube.
4. The combination of claim 3, wherein said vanes are
provided with friction reducing rollers contacting a sur
ber means for inducing ?ow of said ‘?uids.
8. The combination of claim 7 including rotational
?ow blocking means powered for axial straight line move
ment with respect to the axial ?ow impelling means with
in the chamber means in operating timed relation to the
axial ?ow impelling means.
9. In combination with the system of claim 7, a marine
vessel having a stern through which said discharge ex
tends in parallel offset relation to said pump chamber
face of the convolutions of said screw as said moving
abutments retreat.
5. In combination with the pumping system of claim
1, a marine vessel having a stem from which said tube
extends rearwardly in parallel oifset relation to the inlet
and outlet passage portions, and a bottom through which
means.
an intake portion of said tube extends for connection to
said inlet passage portion, said air passage control means
References Cited in the ?le of this patent
UNITED STATES PATENTS
extending upwardly from the air inlet opening in the
tube always above the water line of the vessel.
6. In combination with the system of claim 3, a marine
Re. 16,025
114,507
1,306,572.
wardly in parallel olfset relation to the inlet and outlet
1,551,362
passage portions, and a bottom through which an intake
1,946,097
portion of said tube extends for connection to said inlet
passage portion.
2,409,497
7. A propulsion system for marine craft or the like 25 2,473,603
2,636,467
comprising, ?ow passage means for conducting incom
vessel having a stern from which said tube extends rear
Suczek _______________ __ Mar. 17,
Knowles ______________ _- May 2,
Bartlett _____________ __ June 10,
Barton _____________ -_ Aug. 25,
Morris et a1 ___________ __ Feb. ‘6,
Kessel ______________ __ Oct. 15,
Miller ______________ __ June 21,
Johnson _____________ __ Apr. 28,
1925
1871
1919
1925
1934
1946
1949
1953
pressible ?uid between intake and discharge, conical pump
FOREIGN PATENTS
chamber means connected in axial alignment between
straight sections of said passage means for ‘both pres
surizing said incompressible ?uid to induce ?ow thereof
and volumetrically compressing compressible ?uid, pro
pulsion booster means responsive to ?ow of incompres
30
23,786
188,683
Austria _____________ __ Apr. 10, 1906
Germany ____________ __ Aug. 5, ‘1907
390,495
435,075
France _______________ __ Oct. 6, 1908
France ______________ __ Feb. 21, 1912
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