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Патент USA US3033067

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May 8, 1962
_1_ F, GRAY
Filed Dec. 28, 1959
2 Sheets—-Sheet 2
17M? 1? 6771?)’
17/5’ BEE-2V7’
United States Patent 0
designated generally at 4. Tumblers of this character are
often thirty or more feet in length, and are supported for
turning movement about an axis without being supported
James F. Gray, 1811 Collins St., Wichita Falls, Tex.
Filed Dec. 28, 1959, Ser. No. 862,231
5 Claims. (Cl. 74-674)
Patented May. 8, 196,2
on a shaft.
The differential gears 2 are mounted on sup
port blocks 6 so that the wheels may turn freely.‘ One
of the pairs of differentials is on each side of a perpendic
ular plane which passes through the axis of said tumbler,
This invention relates to the mounting of and drive for
which differentials have the axles thereof in axially aligned
mixing tumblers, and more particularly to a pneumatic
tired mounting and driving device for tumblers for mixing 10
Drive shafts 10‘ extend outward from the respective
materials such as asphalt and other such materials which
housings of differentials 2, each of which housings prefer
require large tumblers to be driven uniformly in a sup
ably has a sprocket 12 thereon. A motor 14 is mounted
ported relation without the use of a central shaft there
on base 1 and has a V-belt pulley 16 thereon, which
V~1belt pulley drives a V-belt pulley 18, in speed reduction
The present device is so constructed that it may be 15 relation, by V-belts 20. The pulley 18 is mounted on a
readily supported and driven with a minimum of noise,
countershaft 22 on which a clutch mechanism 24 is
and at the same time the supports furnish. traction for
mounted. The clutch mechanism 24 may be of conven
turning the tumbler while carrying a heavy load.
tional design and may be remotely operated, as by a ?uid
Various tumbler mountings have been proposed here
cylinder 26, which is actuated through remote controls.
tofore, but these, for the most part, employed chains, 20 (not shown) to engage the countershaft 22 in driving rela
gears or the like, which gears and chains, when used with
tion with the pulley 18, and to disengage the pulley 18
tumblers mixing asphalt, aggregate and the like, contain
therefrom. For heavy tumblers, which will contain heavy
ing abrasive particles readily became worn, thereby mak
loads, the countershaft 22 may extend beneath the tum
ing the upkeep an item of considerable expense and nec
essitating periodical shutdowns for replacements of parts. 25 bler, as indicated in full outline, to drive sprockets 12a
The present device is so constructed as to overcomei
most of the objections to chain and gear driven tumblers,
while at the same time providing a tumbler mounting and
driving mechanism which operates with a minimum of
An object of this invention is to provide a drive ‘for a
shaftless tumbler, wherein the tumbler is resiliently sup
on the opposite sides of a vertical plane passing through
the axis of the tumbler 4. In this manner all the wheels ‘
8 may be simultaneously driven upon the engagement
of the clutch 24.
It is preferable to have pneumatic tires, such as truck
tires on the wheels 8 to support the tumbler 4 for turning
movement about the axis thereof.
Since the heat in tumblers, such as tumblers 4, for mix-_
ing asphalt, often reaches 350 degrees F ., it has not been
Another object of the invention is to provide a tumbler
feasible heretofore to mount such tumblers on pneumatic
drive which supports the tumbler for rotation on pneu 35
rubber tired wheels. However, the present tumbler is so
matic tires.
designed as to' dissipate the greater portion of the heat
Still another object of the invention is to provide a
before it reaches the pneumatic tires on which it is sup
tumbler which is supported for rotation on bands which
ported. The applicant has been able to construct a tum
are spaced outward from the tumbler and wherein heat
bler in such manner as to be able to dissipate the greater
radiation ?ns extend outward from ‘said bands so as to
portion of the heat from the hot asphalt before it reaches
minimize the transfer of heat between the tumbler and
the tires, there-by enabling pneumatic, rubber tired wheels
the pneumatic tires on which the tumbler is mounted.
to be used on the present drive.
With these objects in mind and others which will be
of heavy
come manifest as the description proceeds, reference is
metal welded together to form a substantially true
to be had to the accompanying drawings in which like 45 plate
cylinder, which cylinder has annular segmental plates 30,
reference characters designate like parts in the ‘several
34 and 36 secured therearound as by welding and
views thereof, in which:
which annular segmental plates are spaced apart’ 1on
FIG. 1 is a perspective view showing the tumbler
gitudinally throughout the length of the cylinder’4, and
mounted on pneumatic tired wheels, and showing a motor
which plates radiation ?ns 38; 40, 42, and 44, respec-.
connected in geared relation, through differentials, to the
ported on pneumatic tires.
. ,
pneumatically tired wheels;
FIG. 2 is a sectional view taken on the line 2-2 of
FIG. 1, looking in the direction indicated by the arrows;
tively, are welded. The radiation ?ns are each welded
to the cylinder 28 at one end and to the ?at, annular seg
mental bands 50, 52, 54, and 56 at their opposite ends.
The respective ?at bands 50, 52, 54, and 56 are spaced
FIG. 3 is a top plan view of the tumbler mounting,
showing the tumbler mounted thereon in dashed outline; 55 apart as indicated at 58, to permit expansion and con
traction thereof without distortion of the overall circular
FIG. 4 is a fragmentary sectional view taken on the
form thereof. The ?at band 54 is similar to the ?at
line 4—4 of FIG. 1, looking in the direction indicated by
band 50, except it has guide bands 60 around each edge
the arrows;
thereof for guiding upstanding roller members 62 into
FIG. 5 is a sectional view taken on the line 5—~5 of
bearing rolling relation, so as to ?x the tumbler 4 against
FIG. 7, looking in the direction indicated by the arrows;
movement with respect to base 1, while per
FIG. 6 is a sectional View taken on the line 6—6 of
mitting free turning movement of the tumbler about the
FIG. 7, looking in the direction indicated by the arrows;
axis thereof.
FIG. 7 is a fragmentary, sectional view of one of the
supporting bands for the tumbler.
With more detailed reference to the drawings, the
numeral 1 designates generally a base, which base is pref
erably made of structural members, such as I-lbeams,
H-beams or the like. Pairs of gear differentials 2 are
mounted on each side of the frame 1 and are spaced apart
longitudinally so as to form a cradle to receive a tumbler,
In order to insure uniform contact of roller members
65 62 with band 60, the gaps between the ends of the seg~
mental bands 60 are abridged with segmental band por
tions 64, one end of each band 64 being welded to one of
the segmental bands 60 and the other end of which bands
extend over the end of the adjacent portion of the band
segment, so upon the bands 60 becoming heated, a rela
tive slippage will occur between segmental portions 60
and 64. However, the gap at the end of band segments
60 will be abridged so that the roller 62 will roll along
the edges thereof in a uniform manner.
bands mounted thereon throughout the length thereof,
which bands have faces thereon to complementally en
.gage said pneumatically tired wheels in supporting rela
tion, radiation ?ns secured intermediate said bands and
It will be readily appreciated that, with the shafts of 5 said tumbler so as to mount said tumbler in spaced apart
differentials 2 on each side of frame 1 in axial alignment,
and with the tumbler 4 cradled upon the pneumatic rub
ber tired wheels 8, so as to support the tumbler 4 about
its axis, the device is ready to operate, whereupon, motor
'14 is started and clutch 24 is engaged by actuating a
pneumatic control to engage clutch 24 in driving relation
with shaft 22, so that the V-belt pulley 18 will drive
sprockets 12 and 1211 through chains 11 and 11a, which
relation to said bands so as to present a heat radiation
surface therebetween.
3. In combination with a support and drive mecha
nism for a hot asphalt mixing device, a base, an elongated,
tubular tumbler adapted to be rotated about an axis,
longitudinally spaced apart circumferential band segments
thereon throughout the length thereof, radially disposed,
longitudinally arranged ribs secured to said band segments
in turn will drive shafts 10 to rotate wheels 8 through
differentials 2. In so doing, the wheels 8 will all rotate
in unison and in the same direction. However, if for any
reason, there should be misalignment in the tumbler 4,
the differential wheels will automatically compensate,
which will permit the individual wheels to vary in rota
tion, and at the same time put a uniform pull on each of
the wheels. While multiple drives have been shown to
drive all of the differentials and wheels mounted thereon,
any desired number of differentials and wheels can be
driven by removing the chains 11 or 11a from those
wheels which are not to be driven. In this manner uni
formity of drive may be readily accorded for the partic
ular unit being driven. However, with all wheels rolling
beneath the tumbler, on which wheels the tumbler is sup
and to said tubular tumbler, which band segments are
adapted to support said tumbler on drive wheels, and each
said band segment having a space between adjacent ends
4. A device as de?ned in claim 3, wherein further band
segments are provided, one being secured to one end of
said ?rst band segments to abridge the space between the
vends of said ?rst band segments in movable, over-lapping
relation, a face of said ?rst mentioned band segments and
a face of said over-lapping band segments lying in the
‘same plane, a roller mounted on said base and having the
axis thereof perpendicular to the axis of said support
wheels and having a face of said roller in rolling engage
ment with said band segments lying in said plane.
5. A support and drive mechanism for a hot asphalt
mixing device having ‘an elongated, tubular tumbler which
ported, the turning of the tumbler is assured.
Having thus clearly shown and described the invention 30 is adapted to rotate about an inclined, longitudinal axis,
which mechanism comprises: a base, pairs of differentials
what is claimed as new and desired to be secured by
Letters Patent is:
1. A support and drive mechanism for a hot asphalt
mixing device having an elongated tubular tumbler, which
mounted on opposite sides of said base a spaced distance
thereabove, said differentials having axles extending out
ward therefrom, pneumatically tired wheels mounted on
tumbler is adapted to rotate about an axis, which support 35 said axles for rotation about the respective axes thereof,
which axes of said axles are parallel to the axis of said
and drive mechanism comprises: a base, upstanding
tumbler, said tumbler, having longitudinally spaced apart
standards mounted on said base, di?erential units mount
bands, having the axis thereof lying in ‘a plane mediate
ed on said upstanding standards to rotatably support
the axes of said differentials, with said bands being in
wheels thereon, a pair of pneumatically tired wheels rotat
complementary spaced relation to the spacing of said
‘ably mounted on each said differential unit, the axes of
pneumatically tired wheels on said axles, a drive shaft
said wheels being in parallel relation with the axis of said
tumbler, said differential units being spaced apart trans
versely so the axes of certain pairs of said wheels on cer
tain of said differential units will be on each side of a
vertical, medial plane passing through the axis of said 45
tumbler, said tumbler being supported on pairs of said
extending outward from each of said differentials, and
power driving means operatively connected in driving
relation with the drive shaft of each said ditferential.
References Cited in the ?le of this patent
wheels, and power means operatively connected to at least
one pair of said pneumatically tired wheels to impart driv
ing power thereto to rotate said tumbler.
2. A support and drive mechanism fora mixing device
having an elongated tubular tumbler, which tumbler is
adapted to rotate about as axis, as de?ned in claim 1,
wherein said tumbler has longitudinally spaced apart
Chappell ______________ __ Feb. 1, 1938
Howie _______________ __ Mar. 12, 1940
Traylor _______________ .._ Oct. 2, 1951
Kropp _______________ __ May 19, 1953
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