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Патент USA US2114069

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Apri? E2, 1938,
A. w. AITKEN
291149069
ROAD ROLLER
Filed Aug. 11,- 1956
2 Sheets-Sheet 1'
Gttorn
Vii,
Apri? 12, 1938.
A. w. AITKENI '
291145799369v
ROAD ROLLER
Filed Aug. 11, 1936
‘
a
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"
I 2 Sheets-Sheet 2
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,(Zttornegs
2,114,069
Patented Apr. 12, 1938
UNITED STATES PATENT OFFICE
2,114,069‘
ROAD ROLLER
Andrew W. Aitken, Spring?eld, Ohio, assignor to
The Buffalo-Spring?eld Roller 00., Spring?eld,
Ohio, a corporation of Ohio
Application August 11, 1936, Serial No. 95,458
21 Claims. (CI. 94-50)
This invention is a novel improvement in road
rollers and like vehicles, particularly of the type
shown in U. S. Letters Patent No. 2,029,659‘ issued
February 4, 1936 to Carl F. Greiner in which the
plane of the lower peripheries of the steering and
driving rolls.
A further object of the invention is to provide
?xed stops onv the frame adapted to engage the
road- roller is provided with an auxiliary roll‘ dis
posed intermediate the front steering roll and the
arms when in vertical position; and adjustable
stops of different lengths pivotally mounted on UK
rear driving roll or wheels slightly in advance
the ?xed stops respectively and adapted to be
of the center of gravity of the vehicle, with power
or manual means for raising and lowering said
roll with respect to‘the road surface, whereby the
roll when lowered will carry substantially the full
weight of the vehicle to smooth or iron out irreg
ularities in the road surface. In said patent, the
arms which are pivoted at opposite sides of the
vehicle and which carry at their lower ends the
journals for the auxiliary roll, are adapted‘ to
selectively swung so as to project beyond the con
engage ?xed stops when in fully depressed‘ posi
tion, the arms in such position being disposed
substantially vertically with the auxiliary roll
contacting with the ground and supporting the
20 greater portion of the weight of the vehicle, and
the stops taking the strain and thrust of the arms
when the vehicle is moving forwardly. An im
portant feature of the machine in said patent is
the provision of means for simultaneously pivot
ing the arms through equal arcs so that the axis
of the intermediate roll will always be maintained
parallel with the axis of the rear or driving roll
or wheels, said means maintaining the arms when
in operative position in ?rm contact with the
stops whereby the intermediate roll is rigidly sup
ported with respect to the frame of the vehicle.
In said patent, the stops are ?xed and when
the arms are in engagement therewith the inter
mediate roll is disposed in the plane of the lower
peripheries of the steering and driving rolls or
wheels. In actual practice however it has been
found advisable that, when starting to roll a
road surface of hot loose asphalt, oil macadam,
40 or like paving material, the intermediate roll be
disposed slightly above the said plane to prevent
the said roll from pushing the hot asphaltic or
other paving material in the direction of move
ment of the vehicle. After the surface has been
45 initially rolled the intermediate roll may then be
lowered into said plane‘ and the machine used to
C4 Ci
roll a plane surface.
Therefore the principal object of the present
invention is the provision on the ?xed stop of
50 extra adjustable stops ‘which may be shifted to
engage the arms and maintain same slightly out
of contact with the ?xed stops, thereby prevent
ing thearms from swinging entirely into their
lowermost positions and thus preventing the
55 intermediate roll from being lowered into‘ the
tact face of the ?xed stops and into the path of
swing of the arms.
Further minor objects of the invention will be
hereinafter set forth.
I- will explain the invention with reference to
the accompanying drawings which illustrate one
practical embodiment thereof to enable others 15
familiar with the art to adopt and use the same;
and will summarize in the claims the novel fea
tures of construction, and novel combinations
of parts, for which protection is desired.
In said drawings:—
Fig. 1 is aside elevation of a road roller of the
type shown in the aforesaid patent, showing the
auxiliary roll and power operated raising and
lowering mechanism, also showing my novel ?xed
stop carrying the adjustable stops; the arm being
shown in- the full line position as engaging the
?xed stop and the roll in fully lowered position
contacting with the road surface; and the arm in
the dotted line position indicating the position of
the parts when the roll is in a fully raised inoper
ative position.
Fig. 2 is a plan view of the road roller shown
in Fig, 1.
Fig.‘ 3 is an enlarged perspective view of the
portion of the road roller adjacent the stops and 5
showing the arm engaging. the ?xed stop, the ad
justable stops being swung back out of engage
ment with the arm.
Fig. 4 is an enlarged side elevation showing
the arm engaging one of the adjustable stops
which has been swung into operative position, the
roll being shown as raised slightly above the road
surface.
The road roller shown in Figs. 1 and 2 is of the
type shown in the aforesaid patent, same having
a single front steering roll A mounted in yoke B,
swiveled' in trunnion casting C, the yoke being
operated by steering mechanism (not shown).
Side frames D are connected with the trunnion
casting. C, and are arched upwardly over the front
roll A.
The rear ends of side frames D are sup
ported by drive wheels E disposed at opposite
sides'of theside frames, the motor F for the drive
being mounted between the side frames D. In
order to'provide headroom for the auxiliary roll 55
2
2,1 14,069
G, the lower front portions of side frames D are
recessed to a point substantially under the center
of gravity of the vehicle, the side frames D being
reinforced by channel irons I-I riveted or other
wise secured thereto along their lower edges con~
the thrust from pins 3 when the ?ngers are in
operation.
A rod 6 is provided in each channel 2 adjacent
the outer end thereof and parallel with rod 3;
and recessed portions 4d, 502 respectively are pro
forming with the contour thereof.
Journaled in side frames, slightly in advance
vided in the ?ngers 4 and 5 adapted to receive
of the center of gravity of the vehicle, is a shaft
J carrying arms K at opposite sides of the vehicle
10 keyed thereto or otherwise attached so as to swing
in unison therewith, the lower ends of arms K
carrying the journals for the auxiliary roll G.
The axle of roll G is journaled in bearing blocks
L bolted to the lower ends of arms K, and in order
15 to permit adjustment of roll G when lowered to
the proper vertical operating position with rela
tion to the plane of the other rolls A and E, shims
M are provided between the lower ends of arms K
and the bearing blocks L.
erative position (as ?nger 5 in Fig. 4), the ribs
4b, 511 respectively being arched over and around
20
In advance of the upper ends of arms K are.
power cylinders N pivoted as at N’ to the side
frames, said cylinders having pistons connected
by piston rods Q to the arms K, whereby the
latter may be swung from normal inoperative
position (shown in dotted lines in Fig. 1) to fully
lowered operative position (shown in full lines)
by the power cylinders. Instead of the power
means shown, any other means, either power or
manually operated, may be used, same forming
no part of the present invention.
My novel ?xed stop comprises a plate I dis
posed below the rear portions of channel irons
H and secured thereto in any desired manner,
the forward edge of said plate being adapted to
engage the rear faces of arms K to prevent fur
ther backward movement of the arms when
swung downwardly into substantially vertical po
sition as shown in Figs. 1 and 3, in which posi
tion the intermediate roll G will be disposed, by
40 proper selection on shims M, in the plane of the
lower peripheries of rolls A and E. Plate I is of
width suf?cient to embrace the arms K, and the
plate is recessed as at la (Figs. 2 and 3) for the
reception of the auxiliary roll G, the extending
45 end portions Inc of plate i actually engaging arms
K. Upon the extending portions lac short chan
the rods 6 when the ?ngers are swung into op
the recess portions 4d, 5d.
On rod 6 is a slidable 10
collar 1 adapted to be shifted axially of the rod
to ?ll the gap between the ?nger 4 or 5 which is
swung into operative position, and the opposite
leg of the channel 2, thereby maintaining the
operating ?nger 4 or 5 in ?xed position and 15
against lateral de?ection in the channel.
When both ?ngers 4 and 5 are in the positions
shown in Fig. 3, the arms K will contact squarely
with the ends of portions Ia: and channels 2, and
in such position of the arms auxiliary roll G will 20
be disposed in the plane of the rolls A and E, and
the auxiliary roll G when in operative position,
being disposed near the center of gravity of the
vehicle, may be utilized to effectively roll or
smooth any irregularities in the road surface. 25
When however either of the ?ngers 4 or 5 are
swung into operative position (as for instance
?nger 5 in Fig. 4) the same will prevent the arms
K from contacting with portions Ix, thereby hold
ing the arms ?xed distances therefrom and hold 30
ing the roll G a slight distance above the plane
of the lower peripheries of rolls A and E, thereby
preventing the roll G from pushing the hot loose
asphaltic or other paving material as the road
roller starts to initially roll a pavement of such 35
material.
The stops and ?ngers not only limit the rear
ward movement of the lower ends of arms K but
also receive the thrust and pressure of the arms,
and relieve the piston rods Q from compressive 40
strains when the roll G is contacting with the
road surface and the vehicle is moving for
wardly.
I do not limit my invention to the exact form
shown in the drawings, for obviously changes 45
may be made therein within the scope of the
nel irons 2 are provided securely mounted there
on and terminating with the outer ends of said
claims.
I claim:—
portions so as to likewise engage the rear faces
1. In a road vehicle having a wheeled frame;
members movably mounted on the frame; an
50 of arms K. A rod 3 is mounted between the legs
of each channel 2 adjacent the rear end thereof,
and a plurality of stop ?ngers of different lengths
are pivoted on rod 3 within the channel, two such
?ngers 4 and 5 being shown in the drawings. Fin
55 gers 5 are of somewhat greater length than the
distance from rod 3 to the outer end of the
channel 2 so as to project beyond said outer end
when swung forwardly into operative position, as
shown in Fig. 4, while the ?ngers 4 are of less
60 length than ?ngers 5, but are of greater length
than the distance of rod 3 from the outer end of
channel 2. Fingers 4 and 5 are provided at their
inner ends with journals Ila, 5a respectively for
the rod 3, and with strengthening ribs 42), 5b
65 respectively on one face extending the full length
of the ?ngers, the outer contact ends of the ?n
gers having offset portions 4c, 50 respectively
which, when the ?ngers are thrown into operative
auxiliary ground roll carried by the members;
?xed abutments on the. frame having contact
faces adapted to engage the members; and aux
iliary stops adapted to be selectively positioned
beyond the contact faces to engage the members
and thereby ?x the operative position of the roll,
said stops being adapted to be positioned so as
to project different lengths respectively beyond
the contact faces of the abutments.
2. In a road vehicle having a wheeled frame; 60
members movably mounted on the frame; an
auxiliary ground roll carried by the members;
?xed abutments on the frame having contact
faces adapted to engage the. members and aux
iliary stops mounted on the abutments and being
of different lengths and adapted to be selectively
positioned to engage the members and thereby
change the operative position of the roll.
3. In a road vehicle as set forth in claim 2,
position (as ?nger 5 in Fig. 4), will project be
said stops comprising a plurality of ?ngers adapt
continuations of the portions Ix of plate I, the
shoulders formed by the offset portions 40, 5c
contacting ?rmly with the outer ends of chan
ed to be positioned so as to project different
lengths beyond the contact faces of the abut
ments.
4. In a road vehicle as set forth in claim 2,
70 yond the outer ends of channels 2 and will form
76 nels 2 and portions Inc as shown in Fig. 4 to take
70
said stops comprising a plurality of ?ngers of 75
2,1 1 4,069
different lengths pivoted on’ the abutments and
adapted to be swung so as to project beyond the
contact faces of the abutments.
I
5. In a road vehicle as set forth in claim 2',
said ?xed abutments comprising a plate carried
by the frame and having a contact edge adapted
to engage the members; and said‘ stops compris
ing a plurality of ?ngers carried by the plate
10
adapted to be positioned so as to project differ
ent lengths beyond the contact edge thereof.
6. In a road vehicle as set forth in claim 2,
said ?xed abutments comprising a plate carried
by the frame and having a contact edge adapted
to engage the members; supports mounted on
15 the plate terminating with the contact edge
thereof and disposed in the path of movement
of the members; and said stops comprising a
plurality of ?ngers of different lengths carried
by the supports and adapted to be selectively
20 positioned so as to project beyond the contact
edge.
'
'7. In a road vehicle as set forth in claim 2,
said ?xed abutments comprising a plate carried
by the frame and having a contact edge adapted
25 to engage the members; channel irons mounted
on the plate terminating with the contact edge
thereof and disposed in the path of movement
of the members; and said stops comprising a
plurality of ?ngers of different lengths journaled
30 in the channel irons and adapted to be selectively
swung so as to project beyond the contact edge.
8. In a road vehicle as set forth in claim 2,
said ?xed abutments comprising a plate carried
by the frame and having a contact edge adapted
35 to engage the members; channel irons mounted
on the plate terminating with the contact edge
thereof and disposed in the path of movement of
the members; a rod journaled in the channel
irons; and said stops comprising a plurality of
40 ?ngers of different lengths journaled on the rod
and adapted to be selectively swung so as to pro
ject beyond the contact edge.
9. In a road vehicle as set forth in claim 2,
said ?xed abutments comprising a plate carried
45 by the frame and having a contact edge adapted
to engage the members; channel irons mounted
on the plate terminating with the contact edge
thereof and disposed in the path of movement
of the members; a rod journaled in the channel
50 irons; said stops comprising a plurality of ?ngers
of different lengths journaled on the rod and
adapted to be selectively swung so as to project
beyond the contact edge; and means for main
taining the ?ngers against lateral de?ection in
55 the channel irons when swung into operative
position.
10. In a road vehicle having a wheeled frame;
members movably mounted on the frame adja
cent the center of the vehicle; an auxiliary
60 ground roll carried by the members; ?xed abut
ments on the frame having contact faces adapted
to engage the members when the ground roll is
in contact with the ground and is supporting
the greater portion of the weight of the vehicle;
65 a series of stops carried by the abutments and
being of different lengths and adapted to be
selectively positioned .to engage the members and
take the thrust therefrom and to alter the opera
tive position of the roll.
70
11. In a road vehicle as set forth in claim 10,
3
said stops comprising a plurality of‘ ?ngers of
different lengths: pivoted on the. abutments and
adapted; to ‘be swung so as1 to project beyond the
contact faces of the abutments.
13. In av road vehicle as set forth in: claim 10,
said ?xed abutments comprising a plate carried
by the frame and having a contact edge adapted
to engage the members; and said stops compris
ing a. plurality of ?ngers carried by the plate
adapted to be positioned so as to project different 10
lengths beyond the contact edge thereof.
14. In a road vehicle as set forth in claim 10,
said ?xed abutments comprising a plate carried
by the frame and having a contact edge adapted
to engage the members; supports mounted on the 15
plate terminating with the contact edge thereof
and disposed in the path of movement of the
members; and said stops comprising a plurality
of ?ngers of different lengths carried by the sup
ports and adapted to be selectively positioned so 20
as to project beyond the contact edge.
15. In a road vehicle as set forth in claim 10,
said ?xed abutments comprising a plate carried
by the frame and having a contact edge adapted
to engage the members; channel irons mounted 25
on the plate terminating with the contact edge
thereof and disposed in the path of movement of
the members; and said stops comprising a plu
rality of ?ngers of different lengths journaled in
the channel irons and adapted to be selectively 30
swung so as to project beyond the contact edge.
16. In a road vehicle as set forth in claim 10,
said ?xed abutments comprising a plate carried
by the frame and having a contact edge adapted
to engage the members; channel irons mounted 35
on the plate terminating with the contact edge
thereof and disposed in the path of movement of
the members; a rod journaled in the channel
irons; and said stops comprising a plurality of
?ngers of different lengths journaled on the rod
and adapted to be selectively swung so as to pro
ject beyond the contact edge.
1'7. An attachment for road rollers having a
frame and having an intermediate roll carried
by members movably mounted on the frame, 45
comprising a plate adapted to be mounted on
the frame and having a contact edge adapted to
engage the members; supports mounted on the
plate adjacent the contact edge thereof; and
stops mounted on the supports and adapted to be 50
selectively projected different lengths beyond the
contact edge into the path of swing of the arms.
18. In a road vehicle having a wheeled frame,
members movably mounted on the frame, an aux
iliary ground roll carried by the members, and 55
stops of different lengths engaging the members
for selectively positioning the auxiliary roll at
predetermined points above the plane of the front
and rear rolls.
19. In a. road vehicle having a wheeled frame; 60
members movably mounted on the frame; an
auxiliary ground roll carried by the members;
?xed abutments on the frame having contact
faces adapted to engage the members; and aux
iliary stops of different lengths mounted on the 65
abutments normally terminating within the con
tact faces thereof and adapted to be positioned
in the path of the swing of the arms.
20. In a road vehicle having a wheeled frame;
members movably mounted on the frame; an 70
said stop-s comprising a plurality of ?ngers adapt
auxiliary ground roll carried by the members;
ed .to be positioned so as to project di?erent
?xed abutments on the frame having contact
faces adapted to engage the members; and aux
iliary stops of different lengths mounted on the
abutments normally terminating within the con
lengths beyond the contact faces of the abut
ments.
12. In a road vehicle as set forth in claim 10,
75
75
4-
2,114,069
tact faces thereof and disposed in the path of the
movement of the members, said stops being
adapted to be selectively positioned so as to pro
ject beyond the contact faces of the abutments.
iliary stops mounted on the abutments normally
terminating within the contact faces thereof and
disposed in the path of the movement of the
members, said stops comprising a plurality of
21. In a road vehicle having a wheeled frame;
members movably mounted on the frame; an
?ngers of different lengths adapted to be se
auxiliary ground roll carried by the members;
contact faces of the abutments.
?xed abutments on the frame having contact
faces adapted to engage the members; and aux
lectively positioned so as to project beyond the
ANDREW W. AITKEN.
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