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Патент USA US3086313

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April 23, 1963
I
w. D. WEEKS
3,086,303
SCRAPER BLADE MOUNTINGS FOR TRUCKS
Filed May 25, 1962
3 Sheets-Sheet l
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INVEN TOR.
_Warre/7
Dan/e/ We (ks
BY
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ATTORNEY
April 23, 1963
w. D. WEEKS
3,086,303
SCRAPER BLADE MOUNTINGS FOR TRUCKS
Filed May 25, 1962
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3 Sheets-Sheet 2
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INVEN TOR.
27117.5. 85
War/‘eh
Dan/e/ Wee/(s
BY
ATTORA/EX‘
April 23, 1963
_
w. D. WEEKS
3,086,303
SCRAPER BLADE MQUNTINGS FOR TRUCKS
Filed May 25, 1962
3 Sheets-Sheet 3
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INVENTOR.
Warren .Dd?/é/ We eks
"@AEQM
ATTORNEY.
3,086,303
..
United States Patent 0 ” lC€
Patented Apr. 23, 1963
3
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3,086,303
screw 16‘ (see FIG. 3) which clamps the lower end of
a third cylindrical support post 17 to the bracket. The
post 17 projects upwardly and is ?xedly secured in a
third mounting bracket :18 secured to the side frame mem
SCRAPER BLADE MOUNTINGS FOR TRUCKS
Warren D. Weeks, Kalamazoo, Mich, assignor to Root
Spring Scraper Co., Kalamazoo, Mich.
Filed May 25, 1962, Ser. No. 197,797
10 Claims. (Cl. 37-42)
This invention relates to improvements in snow Scraper
blade mountings for trucks. The principal objects of this
invention are:
UK ber of the truck. The bracket 18 may be identical to the
previously described brackets 10.
The brackets 10 and 18 consist of ?at plates selectively
bolted to the side frame members of the truck at the de
sired positions. Upright tubular guides 19 are Welded
10 to the bracket plates to receive the cylindrical posts 8, 9
or 17. Narrow reinforcing plates 20 welded to the outer
First, to provide a novel mounting for an underbody
snow scraper blade for highway trucks which will ad
sides of the guides de?ne tapped apertures for receiving
the set screws 21 for clamping the support posts in the
justably and yieldably support the blade in operative
scraping engagement with the roadway.
Second, to provide a hydraulically adjustable pivotal
mounting for a scraper blade with a yieldable spring
cushion between the adjusting means and the connection
to a truck so that the blade can yield and pass over ob
stacles without damage to the blade or truck or the
blade adjusting mechanism.
Third, to provide a hydraulically adjustable pivotal
proper vertical and angularly rotated positions. ‘It should
be noted that by reversing the positions of the brackets
10 and .18 to opposite side of the truck frame the posi
tion of the scraper blade can be reversed to incline rear
rwardly and to the left side of the truck. The posts 8
and *9 carry transverse collars 22 (see FIG. 2) on their
20 lower ends which rotatably and rigidly support the pre
viously described hinge shaft 11.
mounting for a scraper blade which can be connected
Toward the rear end of the mounting bracket 13 the
with a snow scraper blade mounted in operative position
thereon by means of the mounting connections of the
side as at 28. The upper end of the housing de?nes a
center hole 29 for a (?uid connection surrounded by an
side flanges 23 of the channel shaped bracket have up
at various angles including reverse angles transversely be
wardly and rearwardly inclined trunnion plates 24 se
low the body of the truck.
Other objects and advantages of the invention will be 25 cured thereto with inwardly projecting male trunnion
bearings 25 near their upper ends. The bearings 25 co
apparent from a consideration of the following descrip
act with and pivotally support the female trunnion bear
tion and claims. The drawings, of which there are three
ings 26 projecting transversely from the lower end of a
sheets, illustrate a highly practical form of the blade
cylindrical spring housing 27. The lower end of the
mounting and adjusting mechanism.
FIG. 1 is a side elevational view of a highway truck 30 housing 27 is open and is axially slotted on its upper
invention.
FIG. 2 is a fragmentary end elevational view of the
annular spring abutment 36. A short length of angle iron
31 is welded over the slot 28 to protect the slot and re
scraper blade illustrating a portion of the supporting 35 store the strength of the cylinder.
Positioned centrally and reciprocably within the cylin
connection between the blade and the frame of the truck
drical housing 27 is an inner cylinder 32 substantially
which is at an oblique angle to the blade.
smaller than the housing and having an annular abut
FIG. 3 is a fragmentary transverse cross sectional view
ment 33 projecting outwardly from its lower end. An
through the blade illustrating the blade adjusting mecha
40 ear 34 on the annular abutment projects into the slot
nism in side elevation.
28 to prevent rotation of the inner cylinder while per
‘FIG. 4 is a fragmentary horizontal cross sectional view
mitting axial movement of the inner cylinder. Stop
taken along the plane of the line 4~—4 in FIGS. 3 and
screws and nuts 35 (see FIG. 6) are engaged through
6.
FIG. 5 is a transverse cross sectional view taken along
the plane of the line 5-—5 in FIGS. 3 and 6.
FIG. 6 is a longitudinal cross sectional view through
the blade adjusting and cushioning mechanism of the
invention taken along the plane of the line 6-—6 in
FIG. 5.
FIG. 7 is a fragmentary rear elevational view of one r
end of the blade showing the adjustable connection of
the piston rod connecting bracket thereto.
FIG. 1 illustrates a highway maintenance truck having
the wall of the outer housing below the abutment 33 to
prevent the inner cylinder from falling out of the hous
ing. A heavy compression spring 36 is positioned within
the housing 27 and bears between the abutments 3t}
and 33.
The upper end ‘of the inner cylinder 32 has a cross
closure plate 37 which may also form the end Wall of a
hydraulic cylinder 38 positioned closely within the smal
ler cylinder 32. The hydraulic cylinder 38 projects down
wardly and forwardly from the housing 27 and may ex
tend into or partially through an opening 39’ formed in
with the usual operator’s cab 4 and bed 5. An elongated 55 the web of the support bracket 13. The lower end of
the hydraulic cylinder carries clamping studs 49 by
snow scraper blade 6 having a wearing edge plate 7 is
means of which a suitable packing gland and seal 41 is
mounted obliquely across the underside of the frame 1
clamped to the lower end of the cylinder around a piston
by means of a pair of upright mounting posts 8 and 9
rod 42. The upper or inner end of the piston rod 42
secured to the side frame members by identical brackets
carries a piston 43‘ reciprocable in the cylinder under the
10. The posts ‘8 and 9 rigidly support a hinge shaft 11
in?uence of hydraulic pressure admitted selectively to
from which the scraper blade is pivotally supported by
the upper and lower ends of the cylinder through ?uid
means of knuckle plates 12 secured to the back side of
connections 44 and 45. The upper connection 45 con
the blade at the upper edge thereof. The construction
sists of a tube which projects through the opening 29
of the brackets 11 and posts 8 and 9 will be described
a frame I1, rear driving wheels 2 and front wheels 3
65 in the cylindrical housing and permits axial movement
in greater detail presently.
of the hydraulic cylinder within the cylindrical housing.
An adjusting cylinder support bracket 13 of channel
Fluid supply lines 46 selectively connect the hydraulic
shaped cross section is provided with a sleeve 14 on
its forward end supported upon the hinge shaft 11 so that
cylinder to a suitable control valve and’ source of pres
sure '47 within the operator’s cab so that the cylinder can
be controlled by the truck driver.
’
70
and obliquely to the frame of the truck. Spaced rear
The lower end of the piston rod 42 projects down
wardly from the sleeve :14 the web of the channel bracket
wardly through the hole 39 and is pinned as at 48 to
de?nes a transverse slot 15 adjustably receiving a clamp
the bracket projects perpendicularly to the hinge shaft
3,086,303
3
spaced knuckle plates 49 on a bracket 53* adjustably se
cured to the back side of the blade 6. As appears more
clearly in FIGS. 1 and 7 the blade 6 has two series of
holes 51 formed therethrough on opposite sides of the
center of the blade to which the bracket 5% may be se
lectively attached as by bolts 52. This permits the brack
et and the connection to the actuating piston rod to be
located accurately with respect to truck frames of dif
ferent widths and on either side of the truck.
a hydraulic cylinder ?tting closely within said smaller
cylinder and bearing against the upper end thereof,
a ?uid connection to the upper end of said hydraulic
cylinder extending through the end of said inner
cylinder and said opening in said housing,
a second ?uid connection to the lower end of said
hydraulic cylinder positioned below said abutment
ring,
It will be evident from the foregoing that when ?uid 10
pressure is admitted to the cylinder through the upper
?uid connection 45, the piston 43 and piston rod 42 will
be forced downwardly swinging the scraper blade 7 into
engagement with the roadway with variable pressure de
pending upon the ?uid pressure applied. As the pressure 15
in the cylinder increases the intermediate cylinder 32
is forced upwardly carrying the annular abutment 33
against the compression of the spring 36. If with any
‘given pressure in the hydraulic cylinder and compression
a piston reciprocable in said hydraulic cylinder and
having a piston rod extending downwardly through
said opening in said cylinder support bracket,
and a connecting bracket laterally adjustably secured
to the back of said blade and having spaced plates
supporting a pivot pin passed through the lower end
of said piston rod whereby extension of said piston
rod under hydraulic presure will move said blade
downwardly against the reaction force of said spring.
2. A snow scraper blade and mounting for a truck hav
ing side frame members comprising a pair of brackets
of the spring 36 the truck moves the scraper blade 7 20 attachable to the opposite side frame members at longi
against an obstruction in the roadway the blade 6 will
tudinally spaced points,
pivot rearwardly on the hinge shaft 11 forcing the piston
rod and intermediate cylinder 32 further upwardly and
rearwardly against the yieldable resistance of the spring
36. The scraper blade 6 and its wearing edge are thus 25
adjustably compressible against the roadway and are fur
ther yieldable automatically against the compression of
a pair of supports vertically adjustably received in said
guides and having transverse support collars on their
lower ends aligned at an angle to the frame members,
a hinge shaft supported in said collars to extend below
said frame,
a scraper blade having hinge knuckle plates on its upper
the spring 36 to swing and pass over obstructions thus
reducing shock to the blade, the blade mounting mecha
nism and the truck itself.
30
a cylinder support bracket of channel shaped cross
section having a sleeve on its forward end supported
1. A snow scraper blade and mounting for a truck
on said shaft and projecting rearwardly therefrom,
a cylindrical support leg secured to said cylinder bracket
What is claimed as new is:
having side frame members comprising a pair of brackets
attachable to the opposite side frame members at longi
rearwardly of said sleeve and projecting upwardly
thereabove,
tudinally spaced points and having vertical tubular guides,
a third mounting bracket adapted to be secured to one
a pair of cylindrical supports vertically and rotatively
adjustably received in said guides and having trans
frame member of said truck and adjustably receiv
ing said support leg to ?x said cylinder bracket
relative to said frame members,
trunnion plates secured to the side ?anges of said
verse support collars on their lower ends aligned
at an angle to the frame members,
a hinge shaft rotatably supported in said collars to ex
cylinder support bracket and projecting rearwardly
tend below said frame,
and upwardly form said support bracket,
the web of said channel shaped support bracket de?n
ing an opening between said trunnion plates,
a scraper blade having hinge knuckle plates on its
upper edge rotatably supported by said hinge shaft,
a cylinder support bracket of channel shaped cross
section having a sleeve on its forward end supported
on said shaft between said two of said plates and
a cylindrical spring housing pivotally supported by
trunnion pins between said trunnion plates and hav
ing an annular abutment at its upper end and de?n
projecting rearwardly therefrom,
ing an opening,
means forming an axial guide slot in the lower end
a cylindrical support leg secured to said cylinder brack
et rearwardly of said sleeve and projecting upwardly
of said cylindrical spring housing,
a cylinder substantially smaller than said housing posi
thereabove,
a third mounting bracket adapted to be secured to one
frame member of said truck and adjustably receiv
ing said support leg to ?x said cylinder bracket
relative to said frame members,
trunnion plates secured to the side ?anges of said cylin 55
der support bracket rearwardly of said support leg
and projecting rearwardly and upwardly from said
support bracket,
the web of said channel shaped support bracket de—
?ning an opening between said trunnion plates,
60
a cylindrical spring housing pivotally supported by
trunnion pins between said trunnion plates and hav
ing an annular abutment at its upper end de?ning
a central opening,
a slot formed axially in the lower end of said cylindri~ 65
cal spring housing and bridged on the outer side
of the housing by an angle bar,
a cylinder substantially smaller than said housing posi
tioned within said housing and having an annular
projecting into said slot,
cylinder and bearing between said abutment ring
and the abutment on said housing,
tioned within said housing and having an annular
abutment ring around its lower end with an ear
projecting into said slot,
a coiled compression spring positioned around said
last cylinder and bearing between said abutment ring
and the abutment on said housing,
a hydraulic cylinder ?tting within said smaller cylinder
and bearing against the upper end thereof,
a ?uid connection to the upper end of said hydraulic
cylinder extending through the end of said inner
cylinder and said openingin said housing,
a second ?uid connection to the lower end of said
hydraulic cyinder positioned below said abutment
ring,
a piston reciprocable in said hydraulic cylinder and
having a piston rod extending downwardly through
said opening in said cylinder support bracket,
and a connecting bracket secured to the back of said
abutment ring around its lower end with an ear 70
a coiled compression spring positioned around said last
edge supported by said hinge shaft,
blade and having spaced plates supporting a pivot
pin passed through the lower end of said piston rod
whereby extension of said piston rod under hydraulic
pressure will move said blade downwardly against
the reaction force of said spring.
3. A snow scraper blade and mounting for a truck
75 having side frame members comprising a pair of brackets
3,086,303
6
5
‘ wardly of said sleeve and projecting rearwardly and
attachable to the opposite side frame members at longi
upwardly from said support bracket,
said support bracket de?ning an opening between said
trunnion plates,
a tubular spring housing pivotally supported by trun
nion pins between said trunnion plates and having an
tudinally spaced points,
a pair of supports projecting-downwardly from said
brackets and having transverse support elements on
their lower ends aligned at an angle to the frame U!
members,
a hinge shaft supported by said elements to extend
transversely below said frame,
annular abutment at its upper end and de?ning an
opening,
a scraper blade having hinge knuckles on its upper
edge rotatably supported by said hinge shaft,
10
a cylinder substantially smaller than said housing po
sitioned within said housing and having an annular
abutment ring,
a cylinder support bracket having a sleeve on its for
ward end supported on said shaft and projecting rear
means forming an axially slidable non-rotative connec
tion between said housing and said cylinder,
a coiled compression spring positioned around said last
cylinder and bearing between said abutment ring and
wardly therefrom,
a support leg secured to said support bracket and
projecting upwardly thereabove,
the abutment on said housing,
a third mounting bracket attachable to one frame mem
ber of said truck and connected to said support leg
to ?x said support bracket relative to said frame
a hydraulic cylinder formed in said smaller cylinder
members,
a ?uid connection to the upper end of said hydraulic
and projecting below said abutment‘ring,
cylinder extending through said opening in said hous
trunnion plates secured to said support bracket rear
wardly of said sleeve and projecting re'arwardly and
upwardly from said support bracket,
1118,
a second ?uid connection to the lower end of said hy
draulic cylinder positioned below said abutment ring,
a piston reciprocable in said hydraulic cylinder and
said support bracket defining ‘an opening between said
trunnion plates,
a tubular spring housing pivotally supported by trun
nion pins between said trunnion plates and having
25
an annular abutment at its upper end and de?ning
an opening,
having a piston rod extending downwardly through
said ‘opening in said cylinder support bracket,
and a connecting bracket secured to the back of said
blade and pivotally connected to the lower end of
a cylinder substantially smaller than said housing posi
said piston rod whereby extension of said piston
tioned within said housing and having an annular 30
rod under hydraulic pressure will move said blade
abutment ring around its lower end,
downwardly against the reaction force of said spring.
means forming an axially slidable non-rotative con
5. A scraper blade mounting on a truck having ‘frame
nection between said housing and said cylinder,
a coiled compression spring positioned around said last
cylinder and bearing between said abutment ring 3
members comprising a pivotal support arranged at an
angle to said frame members and supported therebelow,
a scraper blade pivotally mounted on said pivotal sup
and the abutment on said housing,
P011,
an operating cylinder support bracket ?xedly supported
a hydraulic cylinder ?tting closely within said smaller
cylinder and bearing against the upper end thereof,
a ?uid connection to the upper end of said hydraulic
cylinder extending through the end of said inner
‘cylinder and said opening in said housing,
40
spaced trunnion bearings carried by said support bracket
a second fluid connection to the lower end of said
above and to the rear of said blade,
hydraulic cylinder positioned below said abutment
a cylindrical spring housing having trunnion bearings
ring,
a piston reciprocable in said hydraulic cylinder and 45
having a piston rod extending downwardly through
said opening in said cylinder support bracket,
and a connecting bracket laterally adjustably secured to
the back of said blade and pivotally connected to
the lower end of said piston rod whereby extension
of said piston rod under hydraulic pressure will
move said blade downwardly against the reaction
force of said spring.
4. A snow scraper blade and mounting for a truck hav
ing side frame members comprising a pair of brackets 55
attachable to the opposite side frame members at longi
tudinally spaced points,
trunnion hearings on said bracket and having an an
nular abutment at its upper end,
an inner cylinder positioned in spaced relation within
said housing and having an annular abutment around
its lower end axially slidably and non-rotatively en
gaged with said spring housing,
a cushion spring bearing between said abutment on
said housing and said abutment on said inner cylin
der,
a hydraulic cylinder positioned within said inner cylin
der and bearing ‘against the upper end thereof,
and a piston rod reciprocable in said hydraulic cylin
blade below said support bracket,
said hydraulic cylinder having a ?uid connection at its
lower end positioned below said inner cylinder and
a ?uid connection at is upper end projecting through
the upper end of said housing.
6. A scraper blade mounting on a truck having ‘frame
members comprising a pivotal support arranged at an
angle to said ‘frame members and supported therebelow,
brackets and having transverse support elements on
their lower ends aligned at an angle to the frame
members,
a hinge shaft supported by said elements to extend
transversely below said frame,
a scraper lblade having hinge knuckles on its upper
edge rotatably supported by said hinge shaft,
a cylinder support bracket having a sleeve on its for
ward end supported on said shaft and projecting rear
a scraper blade pivotally mounted on said pivotal sup
port,
wardly therefrom,
an operating cylinder support bracket ?xedly supported
a support leg secured to said support bracket and pro
70
a third mounting bracket attachable to one frame mem
ber of said truck and connected to said support leg
to {fix said support bracket relative to said frame
members,
transverse to its axis pivotally supported by the
der and pivotally connected at its lower end to said
a pair of supports projecting downwardly from said
jeoting upwardly thereabove,
from the frame of said truck by engagement with
said pivotal support and projecting above the rear
of said blade,
trunnion plates secured to said support bracket rear 75
‘from the frame of said truck and positioned above
the rear of said blade,
spaced trunnion bearings carried by said support bracket
parallel to said pivotal support,
A
a spring housing having trunnion bearings transverse
to its axis pivotally supported by the trunnion bear
8,086,303
8
ings on said bracket and having an annular abut
ment at its upper end,
a hydraulic cylinder positioned within said tubular ele
ment in thrust transmitting relation thereto,
and a piston rod reciprocable in said hydraulic cylinder
an inner cylinder positioned in spaced relation within
said housing and having an annular abutment around
its lower end axially slidably and non-rotatively en
and pivotally connected at its lower end to said blade
below said support bracket,
said hydraulic cylinder having a ?uid connection at its
upper end projecting through said housing.
gaged with said spring housing,
a cushion spring bearing between said abutment on
said housing and said abutment on said inner cylin
9. A scraper blade mounting on a truck having frame
der,
members comprising a pivotal support arranged at an
a hydraulic cylinder positioned within said inner cylin 10 angle to said frame members and supported therebelow,
der and bearing against the upper end thereof,
a scraper blade pivotally mounted on said pivotal sup
and a piston rod reciprocable in said hydraulic cylin
port,
der and pivotally connected at its lower end to said
an operating cylinder support bracket ?xedly supported
blade below said support bracket,
from the frame of said truck by engagement with
said hydraulic cylinder having a fluid connection at its 15
said pivotal support and projecting above and to the
lower end positioned below said inner cylinder and
rear of said blade,
a fluid connection at its upper end projecting through
spaced trunnion bearings carried by said support bracket
said housing.
above and to the rear of said blade,
7. A scraper blade mounting on a truck having frame
a spring housing having trunnion bearings transverse to
members comprising a pivotal support arranged at an
its axis pivotally supported by the trunnion hearings
angle to said frame members and supported therebelow,
on said bracket and having an annular abutment at
a scraper blade pivotally mounted on said pivotal sup
its upper end,
port,
‘an operating cylinder support bracket ?xedly supported
a hydraulic cylinder positioned in spaced relation with
from the frame of said truck and positioned above 25
the rear of said blade,
spaced trunnion bearings carried by said support brack
in said housing and having an annular abutment
spaced from its lower end axially slidable and non
rotatively engaged with said spring housing,
a cushion spring bearing between said abutment on said
housing and said abutment on said cylinder,
et parallel to said pivotal support,
a spring housing having trunnion bearings transverse to
its axis pivotally supported by the trunnion hearings
a piston rod reciprocable in said hydraulic cylinder,
and means pivotally connecting said piston rod to said
blade below said support bracket,
said hydraulic cylinder having a ?uid connection at its
on said bracket and having an annular ‘abutment at
its upper end,
an inner tubular element positioned in spaced relation
within said housing and having an annular abutment
opposite ends.
10. A scraper blade mounting on a truck having frame
around its lower end axially slidable and non-rota~ 35 members comprising a pivotal support arranged at an
tively engaged with said spring housing,
angle to said frame members and supported therebelow,
a cushion spring bearing between said abutment on said
housing and said abutment on said tubular element,
a scraper blade pivotally mounted on said pivotal sup
a hydraulic cylinder positioned within said tubular ele
40
ment in thrust transmitting relation thereto,
and a piston rod reciprocable in said hydraulic cylinder
and pivotally connected at its lower end to said
blade below said support bracket,
said hydraulic cylinder having a ?uid connection at its 45
lower end positioned below said inner cylinder and a
fluid connection at its upper end projecting through
said housing.
8. A scraper blade mounting on a truck having frame
members comprising a pivotal support arranged at an 50
angle to said frame members and supported therebelow,
a scraper blade pivotally mounted on said pivotal sup
spaced trunnion bearings carried by said support brack
et parallel to said pivotal support,
a spring housing having trunnion bearings transverse to
its axis pivotally supported by the trunnion bearings
55
on said bracket and having an ‘annular abutment at 60
its upper end,
an inner tubular element positioned in spaced relation
Within said housing ‘and having an annular abut
ment around its lower end axially slidable and non
rotatively engaged with said spring housing,
a cushion spring bearing between said abutment on said
housing and said abutment on said tubular element,
from the frame of said truck,
spaced trunnion bearings carried by said support brack
ets,
a spring housing having trunnion bearings transverse to
its axis pivotally supported by the trunnion hearings
on said bracket and having an annular abutment at
one end,
a hydraulic cylinder positioned in spaced relation With
in said housing and having an annular abutment
spaced from its end axially slidable and ,non-rotative
ly engaged with said spring housing,
a cushion spring bearing between said abutment on
said housing and said abutment on said cylinder,
port,
an operating cylinder support bracket ?xedly supported
from the frame of said truck,
Port,
an operating cylinder support bracket ?xedly supported
I 65
a piston rod reciprocable in said hydraulic cylinder,
and means pivotally connecting said piston rod to said
blade,
said hydraulic cylinder having a ?uid connection at one
end.
>
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,094,515
2,242,826
1, 2,321,833
Abbe _______________ __ Sept. 28, 1937
Keeler _______________ _.. May 20, 1941
Lull ________________ __ June 15, 1943
FOREIGN PATENTS
86,148
Norway ________________ __ July 9, 1955
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