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Патент USA US2410465

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Nov. 5, 1946.~
2,410,465
E. T. SMALL
TAMPING ROLLER Y
Filed Aug. 2, 1940
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BY
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Nov. 5, 1946.
2,410,465
E. T. SMALL
TAMPING ROLLER
Filed Aug. 2, 1940
2 Sheets-Sheet 2
29
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£1
INVENTOR.
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BY
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Patented Nov. 5, 1946
~ ‘2,410,465 ’
UNITED STATES PATENT {OFFICE ~
Everett 1‘. Small, Indianapolis, Ind., assignor' to
J. D. Adams Manufacturing Company, Indian- - .apolis, Ind., a corporation of Indiana
‘
.
Application August 2, 1940, Serial No. 349,433
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3 Claims.
1
" My invention relates to tamping rollers of the
so-called "sheep's foot” type. Among the objects
of my invention are to produce a roller in which
the tamping feet 'may be ‘readily replaced when
worn or when feet of a different size are desired,
to provide for the relative angular adjustment
of adjacent circumferential series of tamping
(CI. 55-24)
it a closure l3 which prevents loss of the drum
contents.
,
Mounted on the cylindrical surface of the drum
are an axially extending series of pairs of semi
circular bands'lli. The ends of these bands are
turned outwardly to form ears I‘! (Fig. 3); and
clamp bolts l8, extending between the adja
feet, to provide a roller unit which can be used
cent ears of the two bands of each pair, clamp
singly or combined with_ another unit, and to
the bands ?rmly to the drum.
'
provide for the roller unit an improved draw 10
‘On each of the semi-circular bands Hi there
bar which is adjustable so that the roller may be
is mounted a circumferentially extending series
offset laterally relative to the pulling vehicle.
of tamping feet 20. These feet are of substan
In carrying out my invention, I form each roller
tialy uniform thickness axially of the drum, but
unit with a generally rectangular frame in which
their circumferentially presented faces are con
a hollow drum isvjournaled on a transverse axis. 15 cavely curved, as will be clear from Fig. 1, so
The tamping feet of the roller are mounted on
that each foot, as ‘viewed axially of the drum,
an axially extending series of pairs of semi
will be wider atits ends than at its middle. In
circular bands clamped to the outer surface of
the preferred foot-shape, each sidev face ,of the
the drum. Each of the front and rear members
foot corresponds substantially to a curve such
of the rectangular frame in which the roller is 20 as would vbe traced by a pointat ground level on
located is provided centrally with a longitudinally
a disk having a radius equal to the distance be
projecting stud to either of which a draw-bar
tween the roller-axis and the outer end of the
may be attached; or, if desired, these studs may
foot and rolling on a plane surface depressed
be used to interconnect a pair of roller. units to
below ground level by a distance equal to the
a common draw-bar. When a single roller unit 25 radial extent of the foot. The narrowest por
is being used, the connection between it and the
tion of a foot so shaped will be located some
associated draw-bar is such that the draw-bar
what nearer to the inner end of the foot than to
may be disposed either perpendicular or at an
the outer end, and the radius of curvature of
angle to the roller-axis. .The tamping feet of
each side face will gradually increase from the
‘ the roller are so arranged as to minimize the 80
inner end of the foot to'the outer end“ Desir
possibility that they will pick up the soil over‘
ably, the inner and outer ends of the foot are '
which the roller passes.
of approximately the same width.
The accompanying drawings illustrate my in
Feet of the kind just described have an advan
' vention: Fig. 1 is a side elevation of a single
tage in operation in that they do not tend to
roller-unit with portions thereof broken away to 35 pick up the soil being rolled. Since the feet
show the construction more clearly; Fig. 2 is a
are of uniform thickness throughout their radial
plan view of a single roller-unit; Fig. 3 is a frag
extent and are set in planes perpendicular to
mental transverse section through the drum on
the roller axis, there is no tendency to pack the
an enlarged scale; Fig. 4 is a plan view illus
soil between the feet of different circumferential
trating how two of the roller units may be con 40 series. Owing to the above described shape of
nected together to form a double roller; Fig. 5
the side faces of the feet, each foot enters and
is a vertical section on the line 5——5 of Fig. 4;
leaves the ground cleanly without picking up
and Figs. 6, '7, and 8 are related views illustrat
any soil. The action of each individual foot is
ing the action of each tamping foot in compact
illustrated progressively in Figs. 6, 7, and 8,
ing the soiL.
‘ 45
Fig. 6 showing a foot just, entering the ground,
Each of the roller units embodies a generally
Fig. 7 a foot at its lowest point, and Fig. 8 a foot
rectangular frame havingicross members‘ in and
longitudinally extending side members I l inter
just leaving the ground. It will be clear from Fig.
'7, that each foot, as it enters the ground, forms
therein a depression having a rear face which,
connecting the ends of=the cross members. With
in the rectangular frame thus formed there is 50 _ when the foot reaches its lowermost point, will
rotatably mounted a hollow cylindrical-drum l2
be spaced from the rear face of the foot as indi
having‘in one end wall ‘an opening through which
cated at 2|. This space provides clearance for
the drum may be ?lled with varying amounts
the outer rear corner of the foot as it leaves. the
of water or sand to control the effective weight
depression in the progression of the roller.- As
of the roller. Such opening has associated with 55 a result, the outer rear corners of the feet do
2,410,465
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notv pick up any soil. Moreover, the front face 1
of the foot imparts to the front face of the
depression a conformation which will not be dis
turbed by the outer front corner of the foot as
the latter leaves the depression. This is of
material advantage, since it is the purpose of
a tamping roller to compact the soil, and if the
feet disturbedv the soil in their upward move
ment compaction of the soil would to'that extent
be interfered with.’
-
In order to prevent slipping of any pair of
bands it upon the outer surface of the drum,
the drum is provided in the plane of each pair
of the bolts employed conveniently serving as the
bolt 39 by which the rear end of the brace 31
is secured to the cross member.
When it is desired to use two roller units to
gether, I may employ the construction illustrated
in Figs. 4 and 5. In this arrangement, two of the
roller units are arranged coaxially and a T-shaped
draw-bar 50 is employed, such draw-bar having
at its rear and parallel bearings for the recep
10 tion of the studs 30 at the front of the roller
units. The studs 30 at the rear of the units are
interconnected by a spacer 5| having at its ends
parallel bearings ‘in which the studs 30 are re
'ceived.
With the double unit just described, each roller
projecting pins 25 adapted to enter holes 26 in 15
unit is free to oscillate about the common axis of
the respective semi-circular bands. By provid
its associated studs 30, as indicated in Fig. 5. I
mg each band with a plurality of holes 26 spaced
?nd
it advantageous to limit the extent of this
apart a distance equal to a fraction of the cir
oscillation as by providing the draw-bar 50 with
cumferential foot-spacing, it is possible to vary
the extent to which the feet of the adjacent pairs 20 rearwardly projecting vertically spaced ears 53
which engage the front inner corners of the frame
of bands are staggered.
Ill-H of each roller unit and limit the extent
of bands with diametrically opposite, outwardly
For the purpose of hauling the roller I pro
vide each of the cross members H) with an out
wardly projecting longitudinal stud 30 screw
to which that frame may oscillate about its as~
sociated studs 30 relative to the draw-bar 50.
The claims of this application are directed to
threaded at its outer end. When a single-unit 25 the
combination of the circumferentially extend
roller is to be used, a draw-bar 3| is attached to
ing bands IS with feet 20 of the shape described
either of such studs through the medium of a
above. The feet alone form the subject matter
block 32 which is received between and secured
of
my co-pending application Serial No. 685,311
to two ears 33 at the rear end of the draw-bar
filed
July 22, 1946.
and which is provided with a longitudinal opening 30
I claim as my invention:
for the reception of the stud 30. Anut 34 on the
1. A tamping roller, comprising a cylindrical
end of the stud 30 serves to hold the block 32 in
drum, an axial series of bands relatively angu
place. Desirably, the block 32 is secured be
larly adjustable on said drum and releasably se
tween the ears 32 by two bolts 35 which pass
cured thereto, and a circumferentially extending
vertically through the block and ears on opposite 35
series of tamping feet on each of said bands, each
sides of the stud-receiving hole in the block. The
of said feet being at least as thick, axially of the
bolt-receiving holes in the block 32 and in the
roller, at its outer end as over the remaining por
ears 33 are similarly staggered so ‘that the draw
‘tions of its radial extent and has circumferen
bar and block may be secured together, as indi
tially presented side faces which are concavely
cated in' full lines in Fig. 2, with the draw-bar in
curved so that each foot is narrower near the
alinement with the stud-receiving hole in the
middle of its radial extent than at its ends, the
block 32. By removing the bolts 35 and turning
narrowest portion of each foot being located
the draw-bar about its axis through 180° relative
somewhat nearer to the inner end of the foot than
to the block 32, the bolts 35 may be re-inserted
to hold the draw-bar at an angle to the stud-re 45 to the outer end and the radius of curvature of
said side faces gradually increasing from the
ceiving hole in the block 32, as indicated by the
inner end of the foot to the outer end.
dotted lines in Fig.2. With the block and draw
2. A tamping roller, comprising a cylindrical
bar so assembled, they may be rotated as a unit
drum, an axial series of bands relatively angu
about the axis of the stud 30 to cause the draw
bar to extend obliquely'forwardlw in either direc 50 larly adjustable on said drum and releasably se
cured thereto, and a circumferentially extending
tion from the roller unit, thus making it possible
series of tamping feet on each of said bands, each
to offset the roller unit laterally either to the
of said feet being at least as thick, axially of the
right or to the left with respect to the hauling ve
roller, at its outer end as over the remaining por
- hicle.
tions of its radial extent and has circumferen
To prevent undue bending stress upon the stud
tially presented side faces which are concavely
30, I may employ a brace 31 which extends
curved so that each foot is narrower near the
obliquely between the draw-bar 3| and an end
middle of its radial extent than at its ends, the
of the associated cross member Ill. The draw
narrowest portion of each foot being located
bar 31 may be provided with two longitudinally
spaced holes 38 either of which may receive .9 60 somewhat nearer to the inner end of the foot a
than to the outer end.
screw passing through the forward end of the
3. A tamping roller, comprising a cylindrical
brace 31, so that the brace may be used irrespec
drum, an axial series of bands relatively angu
tive of whether the draw-bar is in its normal or
larly adjustable on said drum and releasably se<
in an offset position. The rear end of the brace
cured thereto, and a circumferentially extending
31 may be secured to the cross member ill by a
series of tamping feet on each of said bands, each
bolt 33.
of said feet being at least as thick, axially of the
For the purpose of preventing the accumula
roller, at its outer end as over the remaining por
tion of dirt between the bands IS on the drum.
tions of its radial extent and has circumferen
I may mount on each of the cross members it
tially presented side faces which are concavely
a series of drum-cleaning teeth 44. Desirably,
each series of such teeth are secured to a plate 42, 70 curved so that each foot is narrower near the
middle of its radial extent than at its ends.
as by welding. and such plate is bolted to the lower
EVERETT T. SMALL.
surface of the associated cross member i0, one
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