Dec. 21, 1954
E_ R, ISTANDFUSS
TRIP BLADE SNOWPLQW
Filed April 6, 1951
2,697,289
United States Patent ??ce
2,697,289
Patented Dec. 21, 1954
2
2,697,289
TRIP BLADE SNOWPLOW
Ernest. Richard‘ Standfuss, Bucyrus, Ohio, assignor to The
Burch Corporation, Crestline, Ohio, a. corporation
Application April 6, 1951‘, Serial No. 219,669
6 Claims. (Cl. 37-42)
type. It comprises the blade 1 and the. usual mold-board
2v carrying the blade with suitable. attachment means. be
tween the parts 1 and. 2 enabling the renewal of the
blade 1 when worn out or for any other purpose.
I employ in conjunction with the plow which is gen
erally designated as A in. thedrawings, the customary
push frame 3,. this frame being made up of a front trans.
verse hollow beam 4, and- rearwardly converging angle
bars 5, the parts. 4 and 5 being connected by longitudinal
angle bars. or like members to provide a. relatively rigid
frame structure. Any suitable means may be employed
for connecting the push frame which is generally desig
nated as. 3, with the truck or motor vehicle on which the
My present invention embodies certain novel improve
ments in snow plows of the type which are commonly
used today in the form of attachments for trucks, such
plows being pushed by a truck as the motive power for
operating the plow. My invention particularly relates to
the type of snow plow usually called‘ “Trip Snow Plows”
wherein the mounting of the plow blade and associated
plow unit is to be mounted for forward pushing action
under actual conditions of service. The hitch means for
the above purpose are generally designated at B in the
drawings and may be conventional as mentioned above,
not being fully shown.
The spring mounting. means of my invention used for
supporting the plow A may be said to carry said plow
for free ?oating movements, upwardly, forwardly, rear
mold-board is such that the same may yield‘ and rise
wardly and downwardly, there being no rigid connection
when the blade meets anv obstruction requiring, a tilting
at all between the plow and push frame 3. Said mount
action of the blade in order to pass over such obstruc
ing means will now be described.
tion.
25
Projecting upwardly from certain of the longitudinal
Heretofore trip-type snow plows have been mounted
angle members 6, the central ones as shown in Figure 2,
upon the truck or moving vehicle in a manner such that
the pivotal‘ supporting means. for the plow is relatively
rigidly connected with the vehicle so that considerable
shock is received by the vehicle in meeting obstructions,
an. effect of course not desirable, and ofttimes where
spring. cushioning means are used to partially absorb such
shock condition, said cushioning means is not effective to
quickly restore the plow to its normal operating position.
are the spaced‘ brackets 7, having pivot openings at their
upper portions. These brackets are somewhat triangular
in shape and are bolted or otherwise rigidly fastened at
their lower portion to the adjacent side of the member 6
upon which they are mounted. Between the upper por
tions of the brackets 7 is arranged a cylinder having
trunnion parts or pins on opposite sides thereof which are
received in the pivot openings at the upper ends of
When the spring or cushioning means employed are not 35 brackets 7.
sufficient by reason of the power of the spring to pull
Within the said cylinder which is, designated as 9 in
the plow back to its normal operating position, the op
the drawings, there is mounted the rod 10, having on its
erator of the vehicle and the plow attached thereto has
rear end an abutment nut or member 11, between which
to leave his seat on the vehicle and assist in the swinging
and the right hand end of cylinder 9 (which is closed as
of the plow and its mold-board back to proper‘position 40 shown at 9a in Figure 1, except for the provision of an
by expenditure of manual power.
opening through which the front end of the rod 10 ex
It is the particular object of my invention to avoid
tends), is located the compression spring 12. The front
the di?iculties and disadvantages incident to the forego
end of the rod 10 as mentioned passes through the right
ing statement of operation of ordinary plows by utilizing
hand end or head of the cylinder 9 and is pivotally con
spring mounting provisions for the plow for insuring 45 nected as shown at 13 with the rear side of the mold-board
the restoration of the same to its normal operating posi
2. The connecting means between the pivotal supporting
tion after the tilting movement of the mold-board inci
bracketsv 7 and the mold-board 2 of the plow A including
dent to shock action arising when the mold board and
the parts 11, 12 and 13 support the plow A normally in
particularly the plow blade thereof meet obstructions
substantially the position shown in Figure 1;‘ in other
requiring the tilting of the plow in order to pass over : words, in this ?gure the spring 12 is expanded so as to
such obstructions.
carry the rod 10 rearwardly to the limit of movement
An important feature of my invention lies therefore, in
shown in Figure 1, thus maintaining the plow A in the
providing a full spring mounting for the snow plow, upon
operating position also illustrated in said ?gure by a
the truck or other vehicle which may carry the plow and
resilient pull-back action of said spring 10. The mount~
supply the motive force for the propulsion of the latter, 6 ing of the cylinder 9 upon the brackets 7 aifords a rock
the improvements of this invention doing away with the
ing support means for the cylinder in conjunction with
employment of any relatively rigid pivotal mounting
other resilient or spring mounting means which will now
means for the plow such as previously generally referred
be set forth.
to above.
Projecting downwardly from the underside of push
A full understanding of my present invention and the 60 frame 3 adjacent to the front beam 4 thereof is a series
advantages thereof will be had upon reference to the
of pairs of lugs 14 having apertures therein disposed as to
following detail description, in conjunction with the ac
each pair on an axis which is slightly inclined forwardly
companying drawings in which:
in the direction of the lower portion of the plow A. In
Figure 1 is a view generally in section illustrating the
the said apertures of each pair of the lugs or bracket
mounting push frame connected with the front end of a
members 14 is mounted a slideable connector pin 15,
truck chassis, the snow plow employed in conjunction
each pin being connected at its front end in a pivotal
with said push frame, and the separate spring instru
manner as shown at 16 with the adjacent portion of the
mentalities connecting the push frame and the mold
lower part of the mold-board 2. At its rear end each
board of the plow for obtaining a full cushioned spring
pin 15 has a cross pin passing therethrough, designated
mounting for the latter.
17a. Located near the pivotal connection 16 of each
Figure 2 is a top' plan view showing the general fea~
pin with the mold-board there is carried a rigid abut
tures of construction illustrated in Figure 1. The hitch
ment member 17 attached to the pin. Between this abut
between the plow unit and the truck is omitted.
ment member 17 of each pin 15 and the forward of the
Figure 3 is a view somewhat similar to Figure 1, il
two lugs 14 supporting such pin is interposed the com
lustrating the rocking action of the plow as carried by
pression spring 18 which is normally expanded when the
the push frame, when the blade of the plow meets ob
plow A is in its normal operating position.
struction, the tilting disposition of the mold-board and
It will be evidenced from the foregoing description that
blade bringing out somewhat more clearly the action of
virtually speaking the plow A is full spring mounted upon
the spring mounting means provided for the plow.
push frame 3 of the plow attachment unit. In other words,
Referring to the drawings, it Will be observed that the
the plow A is resiliently supported for free general ?oat
snow plow of my invention is generally of a conventional
ing movement on the push frame by reason of the pro
2,697,289
3
visions of the upper centrally disposed spring and cylin
der unit at 12—9, and the connecting rod 10 attached to
the mold-board 2. So far as 1 am aware, it has not been
heretofore proposed to mount a snow plow in the above
described manner for free ?oating and rocking movement
as may be required by the conditions of operation when
the plow is moving forward to the work or when the plow
4
3. A snow plow as claimed in claim 1, in which the
push frame includes a cross beam parallel to and spaced
from the rear side of the mold-board, and in which the
spring means recited comprises a series of springs at in
is required to rock or tilt in the event the blade 1 meets
an obstruction compelling such action.
By the full spring mounting of the plow A upon the
push frame, it is obvious that the general shock incident
tervals along said beam acting between the mold-board
and push frame to yieldably resist rearward movement of
the mold-board.
4. A snow plow as claimed in claim 1, in which the
push frame includes a cross beam parallel to and spaced
from the rear side of the mold-board, and in which the
spring means recited comprises a series of springs at in
to the pushing of the plow into the snow or banks of
snow will be absorbed through the upper and lower mount
ing connections between the plow and the push frame.
When the blade 1, on the other hand meets an obstruc
tion requiring yielding thereof, the action of the parts
tervals along said beam acting between the mold-board
and push frame to yieldably resist rearward movement of
the mold-board, the spring unit comprising a cylinder
rockably mounted on the push frame, a pullrod in said
cylinder, connected at one end to the mold-board, and
will be in part or wholly similar to that shown in Fig
ure 3 as regards the shiftability of the plow A respect
ing the push frame and therefore in relation to the motor
vehicle on which the plow is carried. In Figure 3 it is
apparent that the obstruction designated at C has so
engaged the blade 1 as to push rearwardly on the latter
as the blade yields against the compressive force of the
series of springs 18 carried on the pins 15. Under these
conditions the plow is adapted to rock on the pivot 16
between the pin 15 and the mold-board 2 and the upper
portion of the mold-board as it moves forwardly pulls
the rod 10 in the same direction and causes compression
of the spring 12. The obstruction passed, it is obvious
a spring in the cylinder engaged with the rod to pull the
mold-board rearward after forward rocking of its upper
wardly upon the upper portion of the mold-board to re
store it from the position of Figure 3 to that of Figure
1, its normal position. At the same time if the resistance
to the forward movement of the plow is not unduly great,
the springs 18 on the pins 15 will push the blade and “
plow unit in front of said frame comprising a blade and
a mold board on which the blade is carried, and yield
able supporting means on the push frame wholly support
that the spring 12 by expansive action will pull back 30
portion.
5. In a snow plow, in combination, a push frame, a
plow unit in front of said frame comprising a blade and
a mold-board on which the blade is carried, and means
wholly supporting the mold-board and blade comprising
spring operated devices disposed above and below the
plane of the push frame, the upper of said devices con
nected to the upper portion of the mold-board to resist
forward movement of the latter, the lower of said devices
being connected to the lower portion of the mold-board
and resisting the rearward movement of the mold-board.
6. In a snow plow, in combination, a push frame, a
ing said plow unit, the push frame being disposed in a
plane between the upper and lower portions of the mold
board, and the supporting means comprising cushion
lower portion of the mold-board forwardly so that‘the
spring means connecting thepush frame and lower por
normal position of the plow A is obtained with the spring
tion of the mold board resisting rearward movement of
12 expanded and the springs 18 relatively expanded as a
the mold board, and spring means connecting the upper
normal condition, ready to receive and absorb shock and
to permit of the yielding of the blade 2 and lower part of 40 portion of the mold board and push frame normally acting
to pull said upper portion rearwardly.
the mold-board when obstructions are met requiring the
tilting of the plow A in the manner which has been de
References Cited in the ?le of this patent
scribed and is depicted in Figure 3 of the drawings.
Having thus described my invention, what I claim as
UNITED STATES PATENTS
45
new, and desire to secure by Letters Patent of the United
States, is:
1. In a snow-plow, in combination, a plow unit com
prising a mold-board and connected plow blade, a push
frame in rear of the plow unit disposed approximately
vertically centrally of the mold~board, a spring unit con 50
necting the portion of the mold-board above the plane
of the push frame with said push frame, and spring means
connecting the portion of the mold-board below the plane
of the push frame, with said push frame, said unit and
spring means forming the sole support for the mold-board '
and blade.
. 2. A snow plow as claimed in claim 1, in which the
spring unit mentioned yieldably resists forward movement
of the upper portion of the mold-board, and the spring 60
means mentioned resists rearward movement of the lower
portion of the mold-board.
Number
1,144,763
Name
Date
Heinen _______________ __ June 29, 1915
1,776,788
Gettelman ____ ________ __ Sept. 30, 1930
2,006,761
2,139,328
Frink _________________ __ July 2, 1935
Collins et al ____________ __ Dec. 6, 1938
2,242,826
2,440,905
Keeler _______________ __ May 20, 1941
Maxim et al ____________ __ May 4, 1948
Number
143,396
189,580
FOREIGN PATENTS
Country
Date
Switzerland ___________ __ Feb. 16, 1931
Switzerland ___________ __ May 18, 1937