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Патент USA US2136869

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15,
J. Mack. SPEARS '
291361869
COLLAPSIBLE ASPHALT MACHINE
Filed Oct. 22, 1957
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Patented Nov. 15, 1938
2,136,869
UNITED STATES
,
PATENT OFFICE.
I ' ?2,136,869
COLLAPSIBLE ASPHALT MACHINE
Joseph MacKay Spears, Washington, D. 0.
Application October '22, 1937, Serial No. 170,497
'
2 Class. 1(01. 259-164) V
This invention relates to?asphalt machinery crushed stone and asphalt, the ?mixing mill here
and has special reference to portable asphalt
mixing machines.
?
In the mixing of asphalt material such as is
5 used in the building of roads and the like?it is
common to take weighted quantities of broken
stone and asphalt and pass them through? a
mixing device such as a pug mill in order that
the stone and asphalt may be thoroughly mixed.
In stationary plants the stone and asphalt are
11
usually stored in elevated bins or hoppers from
which they are gravity fed to weigh boxes lo
cated above and emptying into a pug millor
other like device. The apparatus thus is neces
sarily of considerable height and cannot, unless
special provision is ?made for the purpose, be
transported on railroad cars- or the like.
It is one important object of the present in
vention to provide a novel arrangement of port
20 able apparatus of this character which is so con
structed that it may be carried from place to
place on ordinary railroad ?at-cars, the appa
ratus being telescopically collapsible for trans
portation.
25
A second important object of the invention is
to provide a portable, ?at-car mounted hopper
having a frame so constructed and arranged that
the hopper may be held raised when the appa
ratus is in use and lowered when being trans
30 ported from one location to another.
shown being of the usual type of pug mill. No
attempt has been made to show the construction
of the interior of this mill but it is to be noted
that the mill has an open top l3. Surrounding
the mill is a lower frame including a series of
vertical angle iron corner?members l4 arranged
at the corners of a rectangle and having their
lower ends securely anchored to the platform It.
The upper ends of the members l4 are braced 10
together by girt members l5. An upper frame
is also provided which has four angle iron corner
members I6 slidably mounted within the angles
of the members It as clearly shown in Figure 3.
This. frame is telescopically ?arranged with re~
spect to the lower frame. Through the lower
ends of the members l6 and the upper ends ?of
the members l4 extend bolt openings which may
be brought into alinement upon the upper frame
being raised to its upper position and bolts I?! 20
are then removably ?tted in these openings to
hold the frames releasably together.
Fixed to the upper ends of the members 16 is
the upper rectangular portion I8 of a hopper [9
having a downwardly extending tapered body 20 25
which is attached thereto by means of bolts 2|.
The bottom 20 is open at its lowermost point and
is provided with a suitable closure 22.
Connected to the girt members I 5 are plates
I5a to which are bolted the lower ends of sup 30
ports I?a having plates 161) secured to their up
With the above and other objects in view, as
will presently appear, the invention consists in
general of certain novel details of construction
and combinations of parts hereinafter fully de
tangular hopper portion 18 by certain of the
bolts 2|.
and particularly pointed out in the appended
posed between the hopper l9 and the mill l2 to
35 scribed, illustrated in the accompanying drawings
claims.
.
In the accompanying drawings like characters
of reference indicate like parts in the several
40 views, and
Figure l is a side elevation of a portion of
a portable asphalt mixing plant and showing
those parts which relate particularly to the pres
ent invention in position for use,
45
Figure 2 is a similar view but showing the
parts in position for transportation, and
Figure 3 is a fragmentary horizontal section
on the line 3-3 of Figure 1.
In the embodiment of the invention illus
trated in the accompanying drawings there is
shown a platform l0 consisting of a ?at-car body
of the usual railroad type and this platform is
supported in the usual manner on trucks ll.
Mounted on the platform is a mill l2 suitable
55 for mixing aggregates and binders such as
per ends, which plates are secured to the rec
When set up for use a weigh box 23 is inter
35
receive aggregate from the hopper l9, weight the
same and then discharge it into the mill I2 when
the closure 22 is placed in open position. A sim
ilar weigh box 24 receives charges of asphalt 40
binder through a pipe 25 from a suitable supply
tank 26 which, in the present instance, is mount
ed on a second ?at-car 28 adjacent the ?at-car
Ill. From the weigh box 24 the asphalt binder
is emptied into the mill l2 to be mixed with the 45
aggregate. An elevator 21 conveys aggregate to
the hopper H] from a suitable source of supply
which, in the present instance, is the discharge
end of a rotary drier 29 mounted on the car 28.
When in use the various parts of the apparatus
are in the position shown in Figure 1, but the
height of the device is then such that it cannot
be transported by rail. Because of the structure
illustrated and described herein, however, it may
be collapsed vertically so as to be readily trans
55
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A
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2,136,869
ported, which collapsing operation is accom
plished in the following manner:
The weigh boxes 23 and 24 and the elevator 21,
which are removably connected to the main struc
ture are ?rst detached and stored on the car 28.
The lower ends of the braces l'6a are then un
bolted from the plates l5a, and the plates l6b
are unbolted from the sides of the hopper por
tion H3. The bolts H are next removed from the
10 overlapping ends of the corner members l4 and
I6, a suitable hoist, as indicated at l9a, being
used for supporting the hopper [9 during that
operation and for lowering the same, with its
supporting frame, after the removal of these
15 bolts. This lowering operation is then'carried
on until the lower portion 20 of the hopper rests
within and is supported by the mill I2. This
lower portion 20 is then disconnected from the
hopper portion I8 by removing the remainder
20 of the bolts 2| after which the portion I8 is fur
ther lowered by the. hoist, the supportingmem
bers l6 sliding within the supporting members l4
until their lower ends rest on the platform IE].
The entire structure ?will then have been re
25 duced in height to such a degree as to permit of
ready transportation, as shown in Figure 2.
When restoring the parts to position for use, the
foregoing operations will be reversed.
30
What is claimed is:
1. In a portable mixing apparatus for pro
ducing asphaltic mixtures, a wheel supported
platform, a mixing mill mounted on said plat
form and having an open top, a hopper compris~
ing upper and lower portions alined vertically
35 above said mill and adapted to be moved into
raised and lowered positions, a set of vertically
disposed frame members ?xed to said platform
in quadrilateral form about said mill, a second
set of similarly arranged frame members slid
ably engaging the ?rst set, said second set being
?xed to said hopper, and means to secure the
second set in raised position to the first set, said
hopper having its lower portion taperingly re
duced to rest within the open top of the mill
when the hopper is in lowered position, said
hopper having its lower and tapered portion de
tachably bolted to the lower part of the upper 10
portion whereby the upper and lower portions
may be telescopically nested when the device is
collapsed.
2. In a portable mixing apparatus for produc
ing asphaltic mixtures, a wheel supported plat 15
form, a mixing mill mounted on said platform
and having an open top, a hopper comprising up
per and lower portions alined vertically above
said mill and adapted to be moved into raised.
and lowered positions, a set of four vertically dis
posed angle irons ?xed to the platform at the
corners of a rectangle within which said mill is
located, said angle irons facing inwardly of the
rectangle, a second set of fourvertical angle irons
having the hopper ?xed to their upper ends, and
?tting within the angles of the ?rst set, and re
leasable means connecting the lower ends of the
second set to the upper ends of the ?rst set, said
hopper having its lower portion taperingly re
duced to rest within the top of the mill when the 3O
hopper is in lowered position, said hopper having
its lower and tapered portion detachably bolted
to the lower part of the upper portion whereby
the upper and lower portions may be telescop
35
ically nested when the device is collapsed.
JOSEPH MACKAY SPEARS.
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