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Dec. 31, 1946.‘ ,
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F, G, HEHQ
2,413,561
PORTABLE EXCAVATING AND EJECTING MACHINE
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Filed Sept. 26, 1945
INVENTOR
Ema/#03127
ATTORNEYS .
2,413,561
Patented Dec. 31, 1946
UNITED STATES PATENT orgies
2,413,561
PORTABLE EXCAVATING AND EJECTING
MACHINE
Frederick G. Hehr, Santa Monica, Calif.
- Application September 26, 1945, Serial No. 618,689
4 Claims.
1
This invention relates to that type of apparatus
adapted to be used “by divers or other under
water workers for loosening and dislodging mud,
sand, gravel, silt, clay or other impeding granular
matter from their beds or from a given location
and simultaneously ejecting or discharging the
loosened particles of the deposit of material in
suspension, that is, commingled with water, to
(Cl. 37-62)
2 .
marines where speed of operation often is a
highly important factor particularly where the
lives of entrapped persons depend on the rapidity
with which the submarine can be raised. In
disasters of this character it is necessary for a
diver to burrow through the earth immediately
beneath the submarine to provide tunnels or
openings extending transversely thereof for the
passage of lifting chains. These operations may
a different location remote from the loosening
operation and where its presence does not im l0 be carried on with speed and facility by means
of the present invention in contradistinction to
pede the work under progress.
many devices old in the art which are cumber
The principal object of the invention is the
some in character, consume valuable time for
production of a unitary apparatus or device of
purposes of installation and most of which re
the above character which shall be portable and
compact and easily manipulated by the oper
quire one apparatus for the excavating oper
ator, such as a diver or other under-water worker,
ation and a separate one for the removing or
ejecting operation. Furthermore, in most of
and which shall also utilize a ?uid, preferably
these old devices the rearward thrust produced
water, under high pressure as the loosening as
or developed by the discharge of water or air
well as the ejecting agent.
A further object of the invention is the pro 20 under pressure from the excavating nozzle makes
the device extremely dif?cult of handling and
duction of an apparatus of the above character
manipulation by the diver or other under-water
in which the excavating and ejecting ?uid under
operator.
pressure shall be ‘supplied to a common chamber
In the accompanying drawing illustrating a
from a suitable source of supply for simultane
ous discharge from both an excavating nozzle 25 practical embodiment of the invention:
Fig. 1 is an elevation showing a diver or other
and an ejecting nozzle thereby conserving the
under-water operator using the device of the in
amount of fluid under pressure ordinarily re
vention under actual working conditions.
quired for operations of the character referred
Fig. 2 is a fragmentary section taken through
to.
A further object of the invention is the pro 30 the apparatus itself and,
Fig. 3 is a vertical cross-section on the line
duction of an apparatus having the above char
3-3 of Fig. 2.
acteristics in which the inlet pipe for supplying
Referring in detail to the several ?gures of
?uid under pressure to the ?uid chamber shall
the drawing:
provide a convenient gripping means or handle
A metallic ?uid chamber for receiving fluid
for the operator of the device.
35
under pressure, either air or water, is indicated
Still a further object of the invention is the
at [0 and is connected, preferably integrally, with
production of a combined portable, excavating and
a metallic ?uid inlet pipe I l which is bent or
ejecting device or apparatus in which the ex
curved and extends rearwardly of the device, as
cavating and ejecting nozzles shall be positioned
in alignment and in opposed relation to each 40 shown, and provides a convenient handle or
gripping device for a diver l2 who is shown at
other and shall be of equal or the same size or
work in Fig. 1 beneath the surface of water in
capacity whereby the thrust of one nozzle in
dicated at iii. A ?exible tube or hose it is con
one direction produced or created by the force
nected at one end to inlet pipe ii and at the
of the jet of ?uid under pressure discharged
therefrom shall be counterbalanced or neutralized " other end to a source of supply of ?uid under
pressure (not shown) which may be a driving
by the thrust of the other nozzle in the opposite
motor and pump carried by a boat 55. Conven
direction resulting in internally balanced forces.
tional air lines it are shown connected to the
Other and further objects and advantages of
usual helmet I‘! for the diver l2 and they ex“
the invention will appear from the accompany
tend to their source of supply within the boat i5.
ing description, the invention consisting in the
Extending forwardly of the fluid chamber iii
novel portable combined excavating and ejecting
and communicating therewith is a hollow cone
apparatus hereinafter more particularly de
shaped member 58 preferably integral with a
scribed and then speci?ed in the claims.
wall of chamber I0 and constituting the exca
The device of the invention is especially use
vating nozzle of the device. Said nozzle is pro
ful, for instance, in the salvaging of sunken sub
2,413,561
3
vided with a tapering or inclined wall terminating
at its forward end in a discharge opening l8’
of restricted size. The opposite side of said ?uid
chamber I0 is provided with a rearwardly ex
tending hollow cone-shaped member l9 opposed
to and in alignment with the excavating nozzle
[8 and also preferably integral with a wall of
chamber Hi. Said member 19 communicates with
fluid chamber [0 and it constitutes the ejecting
or discharge nozzle of the device. It is also pro 10
vided with an inclined or tapering wall, as shown,
4
on substantially simultaneously, the water adja
cent the work at hand does not become beclouded
thereby permitting the diver to carry on his op
erations with clear vision.
The invention claimed is:
1. A portable apparatus for excavating and
ejecting under-water materials comprising a ?uid
chamber, an inlet pipe communicating with said
?uid chamber and adapted for connection with a
source of ?uid under pressure and providing grip
ping means for manipulating the apparatus, an
excavating nozzle connected to and extending
outwardly from said fluid chamber for excavat
ing materials by the force of the jet of ?uid dis
id’ of the nozzles are of equal or the same di
ameter and therefore of the same capacity, that 15 charged from said nozzle, an ejecting chamber
having an opening adjacent said excavating noz
is, they are adapted to discharge, in a given unit
zie for receiving the excavated materials in sus
of time, the same amount of ?uid under pressure
pension in water, an ejecting nozzle connected to
forcibly fed to them from the common ?uid
said ?uid chamber and extending within said
chamber I9.
A metallic pipe or tube is indicated at 20 and 20 ejecting chamber for discharging a jet of fluid
constitutes a receiving and ejecting chamber for
under pressure therein to draw the excavated ma
terials in suspension through said opening and
the material in suspension excavated by the ac
within said ejecting chamber by suction, said
tion of nozzle l8. Said chamber is cut away or
ejecting nozzle being positioned in alignment with
provided with an opening adjacent its open end
for the reception of inlet pipe H to which it is 25 and in opposed relation to said excavating nozzle
and both of said nozzles having discharge ori?ces
secured by welding, soldering or otherwise. A
of equal capacity whereby the thrust of one nozzle
strut member 2| may be provided which is fas
terminating in a discharge opening l9’ ofre
stricted size. The discharge openings 13’ and
in one direction counterbalances the thrust of the
tened to chambers ID and 2E]. Said strut member
opposed nozzle in the opposite direction and
acts to support and strengthen ?uid chamber IE)
and its attached nozzles 18 and I9 and it also pro 30 means connected to said ejecting chamber for
discharging the excavated materials in suspension
vides a stop for preventing large objects from en
therefrom to a point remote from the excavating
tering or being drawn into chamberZ?. As illus
nozzle.
trated, fluid chamber iii and nozzle H? are en
2. A portable apparatus for excavating and
tirely encompassed by tube or chamber 20 and
ejecting under-water materials comprising a ?uid
nozzle It extends an appreciable distance within
chamber, means for supplying said chamber with
said tube and in spaced relation thereto.
a ?uid under pressure, an outwardly extending
In Fig. 1 the diver i2 is shown at work on a
cone-shaped nozzle extending from and in com
mound of granular material indicatedat 22 which
munication with said chamber for excavating the
is to be broken down into particles and removed
in suspension in the water by means of the ap 40 materials, an inwardly extending cone-shaped
ejecting nozzle in alignment with said ?rst-named
paratus of the invention. The jet of ?uid under
high pressure discharged from the excavating
nozzle and also in communication with said
chamber, said nozzles being of equal capacity
nozzle “3 loosens and breaks away the granular
whereby the thrust of one nozzle created by the
matter of the mound of the materia1 and it is
force of the jet of ?uid under pressure discharged
drawn in suspension in the water into the tube or
therefrom counterbalances the thrust of the other
chamber 20 by suction created by the force of
nozzle in an opposite direction and an ejecting
the jet of ?uid under high pressure discharged
chamber receiving said ejecting nozzle for eject
from nozzle Hi. The kinetic energy of the jet dis
ing the materials in suspension loosened and
charged from said nozzle is imparted to the mate
rial in suspension drawn into chamber 20 and 50 broken away by the action of the excavating noz
drives it through a hose or tube 23 to a point re
zle.
3. A portable apparatus for excavating and
mote from the work at hand as shown in said Fig.
ejecting under-water materials comprising a ?uid
1. Hose 23 is preferably ?exible and is of sub
chamber, means for supplying said chamber with
stantially the same diameter as tube or chamber
2i]. It may be coupled or otherwise connected to 55 a ?uid under pressure, an outwardly extending
tube or chamber 20 in any convenient manner.
cone-shaped excavating nozzle extending from
and in communication with said chamber, an in
Also, if so desired, said ?exible hose 23 may be
wardly extending cone-shaped ejecting nozzle in
held in any desired suspended position to clear
alignment with said ?rst-named nozzle and also
obstructions by means of hollow ?oating mem
bers 24 connected to said hose.
60 in communication with said chamber, said nozzles
being of equal capacity whereby the thrust of one
It will be obvious from the above description
nozzle in one direction created by the force of the
that inasmuch as nozzles l8 and 19 are of equal
jet of ?uid under pressure discharged therefrom
or the same capacity, the rearward thrust created
counterbalances the thrust of the other nozzle in
by the force of the jet of ?uid under pressure dis
an opposite direction and an ejecting chamber
charged from nozzle l8 when the device is in op
receiving said ejecting nozzle and spaced there
eration is counterbalanced by the thrust in the
from and comprising a tube encompassing said
opposite direction created by the force of the jet
?uid chamber and having an open end‘adjacent
of ?uid under pressure discharged from nozzle
said excavating nozzle for receiving the material
l9 so that the device may be easily directed and
manipulated by the operator without undue ef 70 in suspension in water excavated by the action
of said excavating nozzle.
fort. The nozzle I9 not only acts to draw the
4. A portable apparatus for excavating and
suspended material within the chamber 20 and
ejecting granular materials from beneath the sur
to eject it therefrom but it acts as a counterbal
face of a body of water comprising a ?uid cham
ancing medium for the apparatus as well. As the
excavating and ejecting operations are carried 75 ber, a cone-shaped excavating nozzle integral
2,418,561
therewith, a cone-shaped ejecting nozzle in align-I
nected to said chamber and tube for supporting
ment with said ?rst-named nozzle andalso in
said chamber and nozzles, a flexible hose con
nected to said tube for ejecting the excavated ma
terial in suspension in water to a point remote
from said excavating nozzle and ?otative means
tegral with said chamber, an inlet pipe communiév ‘Y
eating with and integral with said chamber, a‘
tube providing an ejecting chamber open at one
end for receiving the excavated material in sus-;
pension in water and provided with an opening.
receiving said inlet pipe, said tube encompassing
said chamber and ejecting nozzle, a strut con
for holding said ?exible hose in suspended posi~
tion.
FREDERICK G. HEHR. '
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