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Патент USA US3041763

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July 3, 1962
Filed April 29, 1960
A uc/mv ?ag 9550.:
United States Patent 0" ice
Patented July 3, 1962
the tubular supports 6, said connecting member is pro
Lucian Koloseus, Wels, Ober-Oesterreich, Austria
(13 Wielemannstrasse, Vienna 18, Austria)
Filed Apr. 29, 1960, Ser. No. 25,761
Claims priority, application Austria Apr. 30, 1959
4 Claims. (Cl. 37-144)
vided with a groove 9 which is adapted to be aligned with
a pair of grooves 13 in the upper surfaces of coaxial bear
ings 8 of the clevis member 16. A latch member 14
extends through the aligned grooves 9 and 13-13 and
is held in position by pins 31 which project through up
standing ears 30 of said bearings, said pins engaging suit
able apertures in the latch member 14. The connecting
member 15 is thereby rigidly held against rotation rela
This invention relates to heavy road working and ma
terial handling equipment such as snow plows, road grad 10 tive to the clevis member 16.
Another groove 9’ located in circumferentially spaced
ers, bulldozers and the like and particularly to the means
relation to the groove 9, provides means for securing the
for mounting a material handling blade to a vehicle.
blade 1 in a nonscr-aping position shown in dotted lines
In the use of such equipment of conventional construc—
in FIG. 1.
tion it has been shown that because of uneven road sur
As therein disclosed, a pair of aligned torsion bar
faces, the scraping edge of a blade is subjected to con
springs 4 are rigidly secured to the connecting member 15
siderable wear and damage resulting from repeated and
at their inner ends, said springs being coaxially positioned
violent contacts with various obstructions. This damage
within the tubular supports 6. The torsion bar springs
often extends to the blade suspension mechanism and, in
are preferably rectangular in section and may comprise a
extreme cases, to the chassis of the vehicle itself. Efforts
directed toward reducing this damage to a minimum by 20 single torsion bar projecting through the connecting mem
ber 15 and extending in either lateral direction therefrom
means of a ?exible mounting of the blade have resulted
if so desired. The outer ends of said torsion bars are
in only partial success.
provided with cylindrical swivels 10 pivotally mounted
This invention has as its main object the elimination
within the outer ends of the tubular supports 6. Swivel
of faults found in known constructions involving the ?exi
ble mounting of road working and material handling 25 plates 11 are secured in any suitable manner to said
swivels and are positioned contiguous the outer ends of
blades. To this end, the blade construction herein dis
said tubular supports.
closed and illustrated has a scraping blade, preferably
A pivot screw 23 is pivoted at one end thereof to up
slanted with respect to its direction of travel, which can
standing lugs 5 of the upper plate 21 adjacent each lateral
swing backward against a counteracting spring about an
end of the blade 1. The ‘free end of each said pivot
axis of rotation which is located preferably above the
screw 23 is projected through an upstanding, apertured
blade and parallel to it. The invention provides a tor
arm 24 which extends upwardly from one of the swivel
sion bar spring mounted coaxially with the axis of rota
plates 11. By tightening nuts 25 thread ?tted upon the
tion of the blade and includes means for pretensioning the
free ends of the pivot screws 23, the torsion bars 4 and,
spring prior to using the blade. The torsion Ibar spring is
therefore the blade 1, may [be pretensioned whereby said
located inside a tubular support and which rotatably
mounts the blade, and the pretensioning means is con
blade presents a predetermined amount of resilient re
nected between the spring and the blade.
Other features and the advantages of such construction
will be understood from the following speci?cation and
sistance to the material being handled.
the accompanying drawings, in which said drawings:
FIG. 1 shows a side elevation of one possible embodi
ment of the invention;
FIG. 2 is a top plan view of the mechanism of FIG. 1;
The entire blade and mounting structure as above de
scribed is rigidly mounted to a tractor or other suitable
vehicle (not shown) by means of a frame 17 which com
prises a Y-shaped yoke 17a pivoted to the clevis member
16 by means of a bolt 2. A long arm 17b connects one
of the yoke arms to a stub shaft 12 projecting outwardly
from one of the swivel plates 11, and a shorter arm 17c
FIG. 3 is a detail view taken generally along the line
45 connects the other yoke arm to a stub shaft 12’ of the
3-3 of FIG. 2;
other swivel plate 11. The difference in the length of the
FIG. 4 is a plan view in partial section of a clevis mem
arms 17b and 170 causes the blade 1 to be positioned
ber of the invention;
obliquely relative to the direction of travel of said blade,
FIG. 5 is an enlarged section taken generally along the
and it will be understood that the obliquity can be re
line 5-5 of FIG. 3; and
FIG. 6 is an enlarged section taken generally along the 50 versed by interchanging said arms 17 b-17c. Also, it will
be understood that the blade 1 may be mounted to scrape
line 6-6 of FIG. 1 adjacent one end of the blade sup
at right angles to the direction of travel by providing
porting mechanism.
arms 17b-17c which are of the same length.
Referring now to the drawings in all of which like parts
are designated by like reference characters, a scraping 55 From the foregoing description it will be seen that
whenever the blade 1 strikes an obstruction or otherwise
blade 1 is pivoted upon coaxial tubular supports 6 by
encounters excessive resistance from the material being
means of friction bearings 3 welded or otherwise suitably
worked, said blade may pivot backwardly, or in a counter
secured to the back of said blade. The tubular supports 6
clockwise direction as viewed in FIG. 1, against the ten
are welded at their inner ends to a connecting member 15
which is rotatably mounted by means of a large clevis 60 sion of the torsion springs 4. This effectively absorbs
heavy shock loads which might otherwise be transferred
member 16.
to the frame and tractor or which could result in damage
The blade 1 comprises a forwardly concave body por
and excessive wear to the blade itself. The friction bear
tion 20 having a horizontally disposed upper plate 21 and
ings 3 retard the return movement of the blade su?iciently
lateral, reinforcing end plates 22. The connecting mem
ber 15 is provided with a forwardly projecting stop 7 65 to prevent sudden shock against the stops 7, 7a and 7b.
The amount of ?exibility of the blade is adjustable to suit
which makes ?atwise contact with the upper plate 21 to
the conditions under which the blade is being used by
limit the clockwise rotation of the blade 1 as seen in
means of the pivot screws 23. By a simple adjustment,
FIG. 1. Additional stops 7a are provided on the tubular
the blade may be folded upwardly and backwardly when
supports 6 adjacent their outer ends adapted to cooperate
not inuse such as during transit from one work location
with stops 7b welded to the back of the body portion 20
of the blade 1, said stops 7a and 7b also limiting the 70 to another.
It will be understood that many departures from the
clockwise rotation of the blade 1 as shown in FIG. 1.
details of this invention may be made without, however,
To prevent rotation of the connecting member 15 and
departing from the spirit thereof or the scope of the ap
pended claims.
What is claimed is:
1. A work handling tool of the type referred to com
member, said connecting member rotatable relative to
said \frame means whereby said blade is foldable upwardly
from an operative to an inoperative position, latch means
associated with said frame means and said connecting
members for optionally locking said blade in either said
prising a blade, a pair of coaxially aligned, tubular sup
operative or said inoperative position.
ports rigidly secured at their inner ends to a connecting
4. A work handling blade as set forth in claim 1 where
member, a pair of torsion bar springs projecting laterally
from said connecting member and positioned coaxially
in the recited blade is pivoted upon said tubular supports
by means of friction Ibearings whereby when said blade
within said supports, said blade pivotally mounted upon
said tubular supports, stop means on said support and 10 is rotated against the reactive effort of said springs and
said blade preventing rotation of said iblade in one direc
subsequently released, the return movement of said blade
in the direction of said stop means is effectively retarded.
tion, means connecting said torsion bar springs to said
blade whereby said springs resiliently urge said blade in
References Cited in the ?le of this patent
said one direction.
2. A work handling tool as set forth in claim 1 wherein 15
the recited means for connecting said torsion bar springs
Gettelman ____________ __ Sept. 30, 1930
to said blade includes adjustable means whereby the re
Weeks ______________ __ Sept. 20, 1932
active e?ort upon said blade is pretensioned.
Schermerhorn ________ __ July 25, 1933
3. A work handling tool of the type set forth in claim
Kimbro et a1. ________ __ Ian. 29, 1957
1 including ?ame means connected to said connecting 20 2,798,419
Moriceau _____________ _.. July 9, 1957
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