July 3, 1962
P. B. ANDERSON
3,042,122
AIR AND OIL PRESSURE RECOIL. MECHANISM FOR PLOWS
Filed Sept. 22, 1958
INVENTOR
States atent Office
3,942,122
Patented July 3, 1962
1
2
3,042,122
of the beam 20 has an aperture 22 through said hammer
head 20a to receive a cross pin 23, seen in FIGURE 3.
AIR AND OIL PRESSURE RECOIL MECHANISM
FOR PLOWS
Peter B. Anderson, P.0. Box 40, Southey,
Saskatchewan, Canada
Filed Sept. 22, 1958, Ser. No. 762,491
2 Claims. (Cl. 172-265)
There are two arms or bosses 24 Welded to the cross frame
member A, and they are spaced apart to receive the
hammerheaded end 20a of the beam 20, and the said
arms 24 have apertures 25 through their ends to receive
the cross pin 23, and the pin 23 is positioned in the aper
tures 22 and 25, thus retaining the beam or shank 20 in
rockable position between the arms 24. On the back of
This invention relates to an air and oil pressure recoil
mechanism for plows and is a continuation in part of my 10 the heammerheaded beam 20 is welded an arm or lug 26,
United States patent application for Air Operated Recoil
seen in FIGURES l, 2, 3 and 5, and the arm 26 has an
Mechanism for Plows Serial No. 571,463 ?led March
aperture 27v in its outer end, seen in FIGURE 5, and
14, 1956, such application now having been abandoned.
the clevis 28 of the piston rod 29 spans the. end of the arm
An important object of my invention has been to pro~
26, and a clevis pin 30 is positioned through and in the
vide shock absorbing means wherein the downward work 15 apertures 31 and 27, thus connecting the beam 20 to the
ing pressure applied to a plow beam or shank is reduced
piston rod 29, and the piston rod 29 is slidably positioned
by the action of my mechanical pressure controlling ar
in the piston rod circumferential bearing 3'2, seen in FIG
rangement as the beam or shank is forced upward.
URE 4, and the piston rod 29 passes through the center
A further object of my invention has been to use oil
of a rubber piston buffer 33, seen in FIGURE 6, and is
and air under pressure over a piston in a cylinder to re—
secured to the center of the piston 34 either integrally or
ceive the shocks a plow beam is subjected to when in col
otherwise. The cylinder 35 and ‘assembly comprises a
lision with stones and the like while in operation.
circumferential cylinder base 36 having a circumferential
Other objects and advantages inherent in my invention
?ange 37 accurately machined to receive one end of the
will be apparent from the following description of an
piston cylinder, which is machined to a slidable or push
embodiment thereof and the appended drawings wherein: 25 ?t within the ?ange 37 in order that the cylinder 35 and
FIGURE 1 is a vertical view in elevation of the left
base 36 and cylinder head 38 be maintained in sym
side of my plow beam and shock absorbing assembly illus
metrical position. The cylinder head 38 and the base 36
trating the plow shovel contacting a stone under the sur—
have projecting circumferential ?anges, designated by 39
face of the ground.
and 40, which have a plurality of rod receiving apertures
FIGURE 2 is a vertical left side view in elevation taken 30 41 equally spaced through and around said ?anges, and a
on a line 4-4 of FIGURE 1 illustrating the plow beam
plurality of rods 42 are positioned in the apertures 41
raised up until the shovel has cleared the stone.
having nuts 42a in order to draw the cylinder head down
FIGURE 3 is ‘a vertical rear or back view in elevation
of my air and oil pressure recoil mechanism for plows in
assembly with a plow beam.
FIGURE 4 is a vertical central section in elevation of
my air and oil cylinder taken on a line 4-——4 of FIG
on the gasket 43 and simultaneously clamp the cylinder
35 between the cylinder base 36 and cylinder head 38;
the cylinder head 38 has two lugs 44 and the upper curved
end 4511 of the column 45 is positioned between the lugs
44, and a pin 46 connects the cylinder head 38 to the
URE 1 illustrating the cylinder base and the piston and
curved head 45a of the column 45. This whole assembly
piston rod, and the rubber compression ring in the piston
of the piston mechanism is plainly illustrated by FIG
ring groove and the rubber buffer between the said pis 40 URE 4 of the drawings. .The base of the column 45b
ton and the base plate, and the cylinder head in assembly
is welded to the conventional cross member A and the
with the curved end of the cylinder supporting column,
beam stop 47 is Welded to the column 45. The piston
and the cylinder head gasket and base plate supporting
34 has a ring groove 48 to accommodate a rubber com
rods.
pression ring 49. An air valve 59 is positioned in the top
FIGURE 5 is a vertical inclined left side view in eleva~ 45 of the cylinder 35 seen in FIGURE 4. A tillage shovel
tion of the upper end portion of my plow beam illustrat
B is bolted to the bottom end of the beam 20 by one or
ing the plow beam piston rod actuating arm projecting
more bolts C.
from the back of the beam and welded to the plow beam
Operation
at one end and having an aperture through its other end,
and a left side spool integral with and adjacent the upper 50
The plow is travelling in the direction indicated by the
and forward end of the beam and an aperture through
arrow F, and the shovel B on the end of the plow beam 20
said spool and beam.
has collided under the surface of the ground G with a
FIGURE 6 is a top plan view in elevation of the ham
stone D seen in FIGURE 1, and FIGURE 2 illustrates
merheaded end of the plow beam illustrating a spool
the plow beam 20* with the shovel B raised up to allow the
55 beam shovel B to ride over the stone D, and during the
welded to either side of the forward end of the beam.
Like reference numerals refer to like parts throughout
upward travel of the beam 20 the beam arm 26 has
the speci?cation and drawings, and like characters refer
shoved the piston rod 29 and piston '34 upward against the
to like conventional parts.
air and oil pressure within the cylinder 35. When the
Referring to the drawings, an air and oil pressure re
shovel B has cleared the stone D, the downward pressure
coil mechanism for plows according to my invention is 60 of air on the piston will return the plow beam 20 and
an improvement in the construction and operation of
shovel B downward into operative position. During the
shock absorbing mechanisms for plows.
foregoing movements, the air pressure within the cylinder
received the shock from the plow beam 2d caused by the
Construction
shovel B striking the stone D. An important functioning
FIGURES 1, 2 and 3 illustrate the several parts of the 65 of this invention different from the prior art is that as the
plow vmechanism in combination, and the method of at
shovel end of the beam 20 is being forced upward against
taching the plow mechanism to a conventional plow
the downward pressure of the piston rod 29, which piston
frame cross member A.
rod is in turn forced downwardly by the piston 34 which
The beam 20 has two metal spools 21 welded to its
is under air and oil pressure, the beam travels in a semi
forward or upper end, as seen in FIGURE 6, which makes 70 circular movement while being forced upward, and as the
the beam appear hammer headed, and hence will be
beam 20 and arm 26 swing upwardly against the pressure
termed a hammerheaded beam 20. The hammerhead 20a
from the air operated piston the beam 20 gains an ad
3,042,122
3
frame member, and having a cylinder adapted to receive
vantage over the downward pressure of the piston as illus
trated in FIGURES 1 and 2. Note the semi circular line
56 and that the piston operating arm 26 has travelled
and retain therein air under pressure and including a pis
ton for the cylinder and a piston rod connected therewith,
arms ?xed on the cross frame member projecting rear
along this line 56 from a point 54 until the arm 26 was
stopped by the stop 47, and during this upward movement
ward and downwardly inclined, a shovel carrying plow
of the beam 20 and the arm 26 the downward pressure of
the piston to the shovel end of the beam 20‘ progressively
beam having its upper end attached to the cross frame
member arms pivoted to move vertically, said plow beam
becomes less as the beam or shank 20 rises, and when
the beam or end of the arm 26 on its upward travel has
an upstanding column ?xed on the cross frame member,
having an integral arm rearwardly projecting therefrom,
reached a point on the line 26 designated by 51 the shovel 10 means pivotally suspending the cylinder from said col
umn, and means pivotally attaching the piston rod for the
end of the beam 20 has already gained a substantial lever
cylinder to the plow beam arm, said cylinder when the
age on the downward pressure of the piston thrust to the
piston rod is so attached inclining rearwardly from the
end of the beam arm 26, and in order to more clearly
vertical when the shovel carrying plow beam is in work
visualize this fact note the length of the dotted line 53
in FIGURE 1 when the beam 20‘ is down in operation and 15 ing relation to the soil with said cylinder movable towards
the vertical when the plow beam moves upwardly, and
receiving the full power or pressure from the piston, then
with the leverage exertable on the piston rod by the plow
note the length of the dotted line of leverage 52 which is
beam through the integral arm thereon decreasing as the
less than half the leverage the piston has on the shovel
pressure within the cylinder of air compressed by the pis
end of the beam 20 as shown by the dotted line 513 in
FIGURE 1.
The dotted line 55 seen in FIGURE 2 in
20 ton increases.
dicates the direction of piston rod downward thrust as it
meets the line 52, to further explain the much less lever
age or power the piston has on the shovel end of the beam
20 when the beam is up as illustrated in FIGURE 2. The
2. A plow beam structure as set out in claim 1 in which
when the shovel on the plow beam is in working relation
to the soil the pivotal connections of the plow beam and
cross frame member and of the piston rod and plow beam
shovel end of beam 20‘ receives the maximum. Working 25 arm are substantially on a horizontal level.
pressure when in operative position. While the illustra
tions of the cylinders 35 in the drawing had to be made
short, it is to be understood that the cylinders should be
much longer in order that the piston 34 on its upward
travel will increase the air and oil pressure but very little. 30
I use oil and air pressure, not hydraulic ?uid in the cylin
ders 35 and the air is pumped into the cylinders through
an air valve 50' seen in FIGURE 4.
The beam 20 may
be called a T or hammerheaded plow beam.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,046,090
Liebau _______________ __ Dec. 3, 1912
1,398,859
Hurtig et a1 ___________ __ Nov. 29, 1921
1,692,035 .
Gruss _______________ __ Nov. 20, 1928
‘2,228,865
Bird ________________ __ Jan. 14, 1941
2,379,779
Ash _________________ __ July 3," 1945
2,405,980
Sands et a1. __________ __ Aug. 20, 1946
Rolf et al. ____________ __. June 1, 1954
It will be understood, of course, that modi?cations may 35 2,679,793
be made in the preferred embodiment of the invention de
2,690,111
scribed and illustrated herein without in any way depart
2,850,956
ing from the spirit and scope of the invention as de?ned
by the appended claims.
Having thus described my invention, what I claim and 40
desire to protect by Letters Patent of the United States is:
1. In a soil working plow structure including a cross
Altgelt _____________ __ Sept. 28, 1954
Rogers et a1. __________ __ Sept. 9, 1958
FOREIGN PATENTS
1056/26
Australia _____________ __ Apr. 9,1926
448,671
Italy ________________ __ May 23, 1949
35,780
Sweden _____________ __ Nov. 12, 1913