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Патент USA US2410900

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Nov., 12, 1946.
Filed Maron e, 194544
5 sheets-sheet 1
v 56
HAY/volw 30ans/u
Nov.`12, 1946.
5 sheets-sheet é
Filed March 6. -19'45
@WMM/o' ß Hnos/u,
NOV. 12, 1946.
' ` Filed March 6, 1945
T5 Sheets-Sheet 4
Nov. l2, 1946.
Filed March 6. 1945
5 'sheets-sheet 5
Patented Nov. 12, `1946
Raymonde.' Radbiu, Moylan, Pa.
Application March> 6, 1945, Serial No.. 581,278»
2 claims.. (C1. 122-5041)
Thev present invention relates to steam genera
tors and it' relates more» particularly to new and
improved more or lessV integral units adapted for
mounting on a Vehicle or the like and‘designed
to generate superheated steam for delivery-f to
separate heating systems orthe like.
An object of the present invention is to pro
videa new and improved mobile steam generator.
Another object of the presentinvention isy to pro
mit its being pumped' out and used directly o
the road.
For the `purpose of illustrating the. invention,
there is showninthe accompanying drawings one
form thereof` which is at. present preferred, al
though it is to. be. understood that the various
instrumentalities of which the invention consists
can-be variously arranged and organized andthat
the invention is not limited to the precise ar
vide a compact more or less integral‘unitgadapted l0 rangements and. organizations of l the instrumen
for mounting upon the chassis> of a truck-or other
talities as herein shown and described.l
vehicle and capable of quicklyv generating'super'
heated steamv for' supply toY a railroad tank-car
steam coil or the like.
Referring to the accompanying drawings in
which like reference characters.indicatelikeparts
Otherv objects and advantages' of the present 15 Figure 1 representsl a side elevationall view of
invention are; apparent in the following detailed
one embodiment ofthe present invention.
description, appended claims and- accompanying
Figure 2 represents a top-plan view ofthe steam
generatingv uniti ofthe embodiment of Figure. 11
" As is well known, road tars and asphalts and
Figure 3 represents4 an elevational View, on a
other similar products are usually shipped in rail 20 somewhat enlarged scale, of the Vembodiment of
Figure 1, but showing the other side of thev unit;
road tank-cars; the tank-cars being ‘loaded while
the material is relatively warm and appreciably
parts being broken away better to reveal‘the con
struction thereof.
iluid. These materials, however, upon cooling in
Figure 4 represents a rear view of the embodi
the. tank-car, tend to hardenE to a point at which
they are semi-solid or plastic. In this state, they 25 ment of Figures 1 to/S shown as it appears in
use connected toa tank-car; parts being broken
cannot be removed> from the tank-car by ordi
nary pumping operations.
away better toreveal the construction thereof.
Accordingly, it is necessary to provide such
Figure 5 represents a vertical cross-sectional
View, on anv enlarged scale, of the novel steam
tank-cars with built-in steam coils which- are
adapted to be connected to a source of high 30 generating and super-heating coil forming part
of the present. invention'.
pressure steam to heat up the contents (after
Figure 6 representsY a` vertical cross-sectional
the cars have reachedv their destination) to a
View generally‘along the-line 6_6- of Figure 5v.
point at which they are- sumciently ñuid to. be
Figure» 7 represents. a vertical: cross-sectional
pumpedA out;
In the past, it has usually been` necessaryA to 85 view generallyl alongA the line ‘I-T of Figure-‘5.
In. one embodiment of the present invention
unload such tank-cars at buildings having high
showngenerally in Figures 1 to» ’7, I> have shown
pressure steam generating systems and for- this
an auto truck'indicated4 generally by thev refer
reason itV has usually been impractical to direct
ence characterv I0»y and' having- a standard chassis
the tank-cars to a point adjacent the road', etc.
being constructed or repaired, as is the most eco 40 I.I upon whichA the novelsteam generating unit
to be hereinafter described is adapted to be
nomical and eflicient Way to deliver such road
tars or asphalts, etc.
The steamV generating unitv includes a frame
The present invention contemplates the. pro.
I2 of structural.'y steel or the like upon which all
vision of anew and improved- compact andA more
of the parts of the unit are mounted with the
or less integral unit which can be» quickly in
exception> of' the fuelI tank |32 which may be
stalled upon the chassis of a~ standard auto truck
mounted directly upon the chassis'forward'of ythe
or the like. and which is’ adapted` safely;_ quickly
frame Ii21 as shownA inEigures 1 and 3.
and eñìciently to generate superheated" steam;
Alternatively, it is possible to makei thefrarne
the novel mobile unit being adapted to be driven 50 I2 somewhat larger `and to mount: the fuel‘tank
up to a tank-car standing in the vicinity of'the
I‘B‘upon the frame.
road being built or repaired and being adapted
The frame I2 may be rigidly connected- to-:t'he
to deliver superheated steam directly to the' heat
chassis III by meansof a plurality of shackles Hi;
ing coils ofthe tank-car so that the tar or asphalt
it being possible t'o provide beams I5 interme
can be heated to a relatively fluid state` to- per 55 diate the chassis- IIIl and the frame I2,.if" desired.
The steam generating unit includes a novel
heating unit I6 to be hereinafter described in
detail, an oil burner I1, a water tank I8 for sup
plying water to the heating unit I6, a low pres
sure air compressor or blower I9 for supplying air
under pressure to the oil burner I1 and also for
supplying air under pressure to the top of the
fuel tank I3, a pump 20 for delivering water from
the tank I8 to the heating unit I6, a power unit
ing tubes connected at their ends through which
the steam passes back and forth to be super
heated to the desired pressure of approximately
150 pounds per square inch.
The outlet end of the superheating system 4I
passes upward and out through the flue-opening
38; a pop-valve or |safety valve 42 being provided
at the end thereof.
A high pressure flexible steam delivery pipe 43
2I for `driving the blower I9 and the pump 20, 10 is detachably connected to the valve 42 and is
adapted to be connected to the intake opening
and means to be hereinafter described for de
44 of the steam heating coil 45 of a tank-car 46.
A flexible return pipe 41 is adapted to be con
heating unit I6) to the heating coils of a tank
nected to the outlet opening 48 of the heating
car and for condensing the used steam and re
15 coils 45; the other end of the return pipe 41
turning it to the water tank I8.
being detachably connected to a return line 49
The power unit 2I may be any conventional
provided with a strainer 5D and leading to a
type of internal combustion engine, having a
conventional steam trap 5I wherein the con
4-groove drive pulley 66.
densed water is separated from the steam and
The pump 2D may be any conventional type of
to the water feed tank 18 through the
water pump, as for example, _a triplex water pump
line 52. A bY-pass line 53 provided with a shut
having a crankshaft 22, a flywheel 23 and a
off valve 54 connects the lines 43 and 52 so that
double-groove pulley 24.
the steam trap 5I can be by~passed by closing
The blower I9 is provided with a double-groove
valves 55 on either side thereof and by opening
pulley 61; the blower I9 and the pump 2U being
the valve 54.
adapted to be driven by the power unit 2I through
The fuel line 2B is provided with a manual ad
double V-belts 25 and 26 connecting the pulley
and shut-off valve 56 adjacent the burner
66 to the pulleys 61 and 24 respectively. The
I1. Another manual valve 6I and a strainer 62
blower I9 is adapted to deliver air under rela
are provided at the other end of thefuel line 28
tively low pressure through a small line 21 to
near the tank I3.
the top of the fuel tank I3; the air pressure thus
The fuel delivery line 28 is also provided with
livering superheated steam (generated by the
created at the top of the fuel tank I3 serving
to drive the fuel oil through the lowermost de
livery line 28 to the burner I1.
Most of the compressed air from the blower I9 l
passes through the relatively larger air line 29 '
to the oil burner I1.
The water pump` 20 is adaptedto pump feed
water from the water tank I8 through the line
36 and to deliver the water to the heating unit I6 A
through the line 3 I .
The water tank I6 is provided with an upper
most filling pipe 32 and a level gage glass 33.
The novel heating unit I6 forming part of the
present invention includes a head 34 of ceramic
heat-resistant material having an open-ended ‘
an automatic safety shut-off valve 51 which is
‘spring-tensioned to closed position and which is
provided with an outer arm or lever 58 to which
one end of a wire or cable 59 extends; the other
end of the wire or cable 59 being secured- to the
pop-valve 42 through a fusible metal link 6D.
The lever 58 cf the automatic valve 51 is nor
mally held by the wire or cable 59r so that it
maintains the valve 51 in open position (against
the spring pressure thereof) to‘permit flow of
fuel oil therethrough to the burner I1.
Should the temperature in the heating unit I6
rise too high (duc to failure of the water supply
system or to any other cause), the link 6U will
melt and -will release the wire or cable 59 which in
turn will permit the automatic valve 51 to move
combustion chamber 35 therein; the nozzle 36
of the oil burner I1 being in line with the opening
to closed position thereby to shut off the flow of
of the combustion chamber 35 and being adapt
ed to blow the combustion gases thereinto.
The head 34 is connected to the rear end of an ‘
fuel to the burner I1.
Instead of being directly connected to the pop
valve 42, the fusible link 60 may be connected to
elongated generally cylindrical horizontally-dis~
the pipe intermediate the valve 42 and the inner
posed heat-transfer chamber 31 of metal or the
most superheating tubes 4 I.
like through which the combustion gases pass,
Shut-off valves 63 and 64 may be provided in
eventially to escape through a flue-opening 38
water lines 3D and 3I respectively, adjacent
provided at the front end of the chamber 31.
the pump 2U.
Within the heat-transfer chamber 31 is dis
The power unit 2 l, the blower I9 'and the pump
posed a continuous water-tube steam generating
20 may be installed within a weather-proof com
coil system which includes an outermost helical
partment 65 to protect them from the elements.
coil 39 fitting snugly within the chamber 31 and
In operation, the novel mobile steam generating
extending generally the entire axial dimension 60
unit of the preesnt invention will quickly supply
superheated steam under appropriate pressure to
As shown particularly in Figure 5, the rear end
the heating coils 45 of the tank-car 46 until the
of the coil 36 extends downwardly and through
tar or asphalt has been heated sufficiently .to
the wall of the chamber 31 and is connected with
render it relatively fluid whereupon it 'can be
the water delivery line 3|.
pumped out of the tank-car by any appropriate
The front end of the coil 39 is connected with
pump in conventional manner.
the corresponding end of an inner superheating
` The return pipe 41, the return line 49 and the
coil 40 disposed co-axially with the outer coil 38
steam-trap 5I permit continuous return of the
but radially spaced appreciably therefrom.
The inner coil 40 extends rearwardly from its 70 used steam to the water tank I8 so that it is not
necessary to add water to the tank except at rare
intake end and terminates substantially short of
the rear end of the outer coil 39. The rear end
of the coil 48'connects with one end of an in
Thus, the novel mobile steam generating unit
of the present invention can be used at' places
nermost superheating tube system 4l which is.
made up of a plurality ofspaced axially-extend 75 .where there is no city or other water supply,
The pop valve 42, the fusible link `lill, the cable
59 andthe automatic valve 51 provide a foolproof
unit which cannot explode, since, when the tem
perature and pressure within the heating unit
I6 become excessive, not only is the pop valve
opened to release the steam, but also the auto
matic valve 51 is closed to shut off the oil burner
Where two or more cars are provided with in~
ter-connected steam heating systems, they can
, all be heated simultaneously; the delivery pipe
43 being connected to the first car and the return
pipe 41 being connected to the last car.
While the novel mobile steam generating unit
of the present invention is intended primarily for
use in heating road tar, asphalt and other bi
to said oil burner andv including-a combustion
chamber and an elongated heat-transfer cham
ber communicating with said combustion cham
ber, a closed coil system disposed within said
heat-transfer chamber, said coil system including
a relatively long outer coil, a shorter coil disposed
generally coaxially within said outer coil and
spaced substantially radially therefrom and a se
ries of innermost generally axially-extending
superheating tubes, means vfor forcing water
through said outer coil, said inner coil and said
innermost tubes successively, said water being
converted to superheated steam therewithin, a
steam delivery line leading from said coil system
and having a safety valve adapted to relieve ex
cessive `steam pressure, an automatic shut-olf
tuminous products, it can be used equally well
with other petroleum derivatives such as Amiesite,
valve operatively connected within said fuel line,
displacement (preliminary to welding, for exam
heating unit disposed in operative juxtaposition
and means including a fusible metal link posi
tioned adjacent said steam delivery line for clos
or with molasses or other products requiring heat~
The novel mobile steam generator of the pres 20 ing said automatic shut-off valve when the tem
perature of said steam delivery line exceeds a
ent 'invention can also be used wherever high
predetermined value.
pressure steam is required remote from fixed
_2. In a mobile steam generator adapted for
steam and/or water supply; as for example, in
mounting on an auto truck or the like, an oil
thawing manholes or culverts, cleaning drums,
tanks or other equipment, soil sterilization, gas 25 burner, a fuel line leading to said oil burner, a
to said oil burner and including a combustion
chamber and an elongated heat-transfer chamber
The novel unit of the present invention gen
communicating with said combustion chamber, a
erates steam almost immediately upon lighting of
the oil burner and the ratio of weight to steam 30 closed coil system disposed within said heat
generating capacity is extremely low.
transfer chamber, said coil system including a
relatively long outer coil, a shorter coil disposed
The present invention may be embodied in
generally coaXially within said outer coil and
other speciñc forms without departing from the
spaced substantially radiallytherefrom and a se- _
spirit or essential attributes thereof, and it is
ries of innermost generally axially-extending su
therefore desired that the present embodiment
perheating tubes, means for forcing water
be considered in all respects as illustrative and
through said outer coil, said inner coil and said
not restrictive, reference being had to the ap
innermost tubes successively, said water being
pended claims rather than to the foregoing de
converted to superheated steam therewithin, a
scription to indicate the scope of the invention.
Having thus described the invention, what I 40 steam delivery line leading from said coil system
and having a safety valve adapted to relieve ex
claim as new and desire to protect by Letters Pat
cessive steam pressure, an automatic shut-off
ent, is:
valve operatively connected with> said fuel line,
l. In a mobile steam generator adapted for
and means for closing said shut-off valve upon
mounting on an auto truck or the like, an oil
burner, a fuel line leading to said oil burner, a 45 overheating 0f said coil system.
heating unit disposed in operative juxtapositionv
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