Jan. 28, 1958 R. D.

SHAD 2,821,217
BLADE ATTACHMENT FOR DOZERS
Filed June 24, 1955 2. Sheets-Sheet

Afg. /

T
Aichard A. Shaff
INVENTOR.

BY Arts;
Jan. 28, 1958 R. D. SHALD 2,821,217
BLADE ATTACHENT FOR DOZERS
Filed June 24, 1955 2 Sheets-Sheet 2

36 5O 39

I% W.
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Saasanay SY
Y

- 2Z.

Achara A. Sa?a
INVENTOR.

by 2a4vy
A-4- (Aca,s
 United States Patent Office 2,821,217
Patiented Jan. 28, 1958
2
42, the outer edges of said blades comprising a plurality
of cutting notches or steps extending rearwardly from the
circular cutting portion 42 as indicated at 44. A verti
2,821,217 cally extending cutter blade 46 is provided from the
BLADE ATTACHMENT FOR DOVAERS 5 circular forward cutting portion 42 and extends upwardly
into the apex portion 36 of the blade attachment. A
Richard D. Shaid, Stuart, Nebrassignor of fifty percent moldboard strip 48 having the configuration of the curved
to John Shald, Stuart, Nebr. portion 38 of the blades 32 and 34 is provided in overlying
Application June 24, 1955, Serial No. 517,725 0. relationship to the blade portions, see Figure 4, and is
o secured to the horizontally extending blade portion 40
2 Claims. (C. 144-34) by means of welding, for example.
Thus when the blade attachment 30 is urged into
contact with trees or heavy brush, for example, the
- - notched blade portions 44 provide a step-by-step cutting
This invention relates generally to a blade attachment action wherein the notch portion slipping by a relatively
for dozers and is more particularly concerned with an large tree will permit the tractor to gain traction and
angle age,appeal utilis, W -
th
Caractic.
blade is highly efficient for clearing of this
shaped land-clearing blade attachment including a sub- It will be noted that the horizontal blade portions 40
stantially horizontally disposed notched blade portion * include portions extending toward each other between
extending along the lower edge of said blade attachment, the side blades 32 and 34, these portions being indicated
and including means for permitting ready adjustment of at so. The intersection of the horizontal blade portions
the blade relative to the tractor supported yoke, said blade 50 and the forward portion of the blade attachment is
line,"EE.g SE E,
Drusn and Syrgent upper
Similar depris. indicated at 52 andthehasends
ing, for example, secured
of athereon,
pair ofbyspaced
meansupwardly
of weld
wi?". ERyieldity.
-
Early sing less lever elements 54 and
which are pivotally connected at their opposite end
of construction and operation as more fully hereinafter by means of a suitable pivot pin 58 to a connecting tongue
described and claimed, reference being had to the ac-
companying drawings forming a parthereof, wherein like
60 which contains vertical aperture 62 therein which will
be aligned with apertured portions 64 and 66 on plates
n". F",ES thov's 26 and being
tongue is secured
pilyto plates yoke i2, saidof connecting
by means a suitable
attachment relative to a forward portion of the support connecting pin 68. Secured to an upper surface portion
tricte 2 is a top plan view of the novel blade attach- 35 of the connecting tongue 6t) is an upwardly extending
lative t f d f th t bracket element 70 which has an angular upper end
t relative to the forward portion of the support portion 72. The bracket element 70 is reinforced on the
tor; o tongue element 60 by means of suitable reinforcing gusset
time it. is a front elevational view of the novel blade plate portions 74 and 76. A pivot pin 78 extends between
a. E. oil."in enlarged
tially . sectional
go a view
WW taken substan-"
taxel SSa the leverandelements
thereof, 54 and 56,
have journalled adjacent
thereon the lowerbrace
an extensible end
I Figure Z; - made of a tubular element 80 which has extending there
5 E.5 is a rigal view taken substantially on line from at right angles an upwardly extending tubular ele
-5 of 1gure I; an ment 82. The element 82 has secured at its upper end,
Figure 6 is a perspective view of a lost motion connec- 45 by means of welding, for example, a nut element 84
tion between a tractor supported yoke and the blade With threadedly E. all aGig bolt 86 which
attachment. extends through a suitable aperture 88 contained in the
Indicated generally at 0 is the forward portion of a portion 72 of the bracket 70. The bolt 86 includes a
tractOI which has pivotally mounted thereon suitable hori- conventional head portion 99 and has threadedly disposed
zontal pivot pins (not shown), a vertically adjustable so thereon a lock nut 92 for retaining the fixed adjusted posi
yoke 12, said yoke including rearwardly extending legs tion of the blade attachment. By rotating the bolt 86
S4 and 16, each of which includes suitably disposed ears, after the lock nut 92 has been backed away from th
8 which have secured thereto a hydraulic fluid notor nut 84 of the tubular element 82, it is possible to adjust
cylinder and piston assembly 20 which is suitably con- the forward end of the blade attachment relative to a
nected to a portion of the tractor 10 whereupon the yoke 55 pivot pin 58, thus attaining the desired angle of attack
may be adjusted about the previously mentioned horizon- blade
tal pivot pins. The previously mentioned structure is con-
for the horizontal cutter blade portions 49 of said clearing
Yeti. and scordingly a further description is not be- The blade portions 38 of both side blades 32 and 34
leved
The neceSSary. include rearwardly opening notched out portions 94.
arms 14 and 16 of the support yoke include in- 60 which overlie the yoke portions 22 and 24 providing
wardly directed forward portions 22 and 24, respectively sufficient
which are secured together by means of a pair of overly clearance there-between to permit the previously
ing plate elements 26 and 28. mentioned adjustment. The yoke portions 22 and 24,
The V-shaped clearing blade attachment is indicated each including at right angles thereto forwardly extending
generally at 30 and includes a pair of rearwardly diverg- 65 stop or guide elements 96, see Figures 2 and 6, which are
received in vertically extending slots 58 of guide plates
ing side blade portions 32 and 34 which intersect on a
forward apex portion 36, said blades being secured to- 100 which are secured on an inner portion of the up.
gether by means of welding, for example. The side wardly curved portions of the blades 32 and 34. It will
Slades 32 and 34 each includes an upwardly curved por- be observed that in adjusting the blade attachment 38, the
tion 38 which terminates in a horizontal brush cutting 70 slots 98 of the plates 199 will permit relative movement
blade portion 40 secured on the lower edge thereof. The between the yoke 12 and the blade attachment.
blade portions 40 intersect at a circular cutting portion Removal of the blade attachment 30 and the mounting
 2,821,217 . s
3 .. . . . * * 4

yoke 12 is accomplished by merely removing the connect which are adjustable with respect to each other, one of
ing pin 68 from the aligned apertures 62, 64, and 66, said elements being pivoted to said forward pivot and the
whereupon the tractor and yoke may be backed away other of said elements being connected to said upstanding
from the blade attachment. There is sufficient clearance bracket.
between the walls of slots 98 and the elements 96 to 5 2. An attachment for the forwardly extending yoke of
permit elements 100 and elements 96 to become dis a vehicle, said attachment comprising a blade which has
engaged when the tractor is moved away from the a pair of rearwardly diverging sides, said sides being ar
attachment. ranged on the outside of said yoke, a pair of rearwardly
Various positional directional terms such as "front,” diverging blades at the lower edges of said sides, said sides
"rear,” “top,' etc., are utilized herein to have only a O constituting a moldboard, said blades having parts which
relative connotation to aid in describing the device and are protrude in advance of said sides and are provided with
not intended to require any particular orientation with cutting edges, said blades having flat bottom surfaces,
respect to any external elements. a tongue, a connecting pin separably attaching one end
The foregoing is considered as illustrative only of the of said tongue to said yoke, an upstanding bracket fixed to
principles of the invention. Further, since numerous said tongue, levers mounted for pivotal movement about
modifications and changes will readily occur to those an axis that is approximately horizontal, said levers being
skilled in the art, it is not desired to limit the invention to capable of pivoting about the last mentioned axis and with
the exact construction and operation shown and described, regard to said tongue, the forward ends of said levers
and accordingly all suitable modifications and equiva being fixed to said blades and spaced from each other,
lents may be resorted to, falling within the scope of the 20 a forward pivot located between said levers and connected
invention as claimed. thereto, an extensible brace pivoted at one end to said
What is claimed as new is as follows: forward pivot, said extensible brace including a pair of
1. An attachment for the forwardly extending yoke of elements which are adjustable with respect to each other,
a vehicle, said attachment comprising a blade which has one of said elements being pivoted to said forward pivot
25 and the other of said elements being connected to said
a pair of rearwardly diverging sides, said sides being ar
ranged on the outside of said yoke, a pair of rearwardly upstanding bracket, lost motion connecting means secured
diverging blades at the lower edges of said sides, said to said sides and to spaced parts of said yoke to partially
sides constituting a moldboard, said blades having parts support said attachment and yet permit some relative
which protrude in advance of said sides and are provided movement between said, attachment and said yoke, said
30 sides having notches through which parts of said yoke
with cutting edges, said blades having flat bottom sur
faces, a tongue, means attaching one end of said tongue pass, said lost motion connecting means located adjacent
to said yoke, an upstanding bracket fixed to said tongue, to said notches.
levers mounted for pivotal movement about an axis that References Cited in the file of this patent
is approximately horizontal, said levers being capable of
pivoting about the last mentioned axis and with regard UNITED STATES PATENTS
to said tongue, the forward ends of said levers being 2,336,124 Phoenix ---------------- Dec. 7, 1943
fixed to said blades and spaced from each other, a forward 2,485,407 Peterson --------------- Oct. 18, 1949
pivot located between said levers and connected thereto, 2,633,164 Kissner -------------- Mar. 31, 1953
an extensible brace pivoted at one end to said forward 40 Long ------------------ Sept. 1, 1953
pivot, said extensible brace including a pair of elements 2,650,628