Note: Descriptions are shown in the official language in which they were submitted.
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FURROWING TIP BODY FOR A PAIRED ROW OPENER
FIELD OF THE INVENTION
The present invention relates to a paired row opener for opening a
furrow and placing a paired row of particular material in the furrow, and more
particularly relates to a furrowing tip body arranged to be supported on a
body of the
opener for ready separation to replace the wearing components thereof.
BACKGROUND
The use of paired row for row openers are known when it is desirable to
place two rows of seed and a row of fertiliser parallel to one another
trailing a single
furrowing element. A typical arrangement of a paired row opener includes a
knife to
produce a deep narrow furrow and separate wings spaced in the direction of
travel
and laterally outward in relation to the knife for widening the furrow to
position a pair
of seeded rows along opposing sides of the furrow.
One example of a paired row furrow opener having a knife and wings is
disclosed in Canadian Patent 2,432,272 in which the knife, the wings and a
deflector
for splitting the seed into a paired row are separable together from a body of
the
opener which is mounted on the implement shank of a cultivator. A central
chamber
above the deflector, where the seed is split into the paired rows, is
positioned
rearwardly of the wing portions so that the central chamber is open to the
sides and
bottom of the tip body. In some wet conditions, it is possible for mud to
enter into the
central chamber from the sides and from below the wings so as to cause some
plugging of the seed intended to be dispensed in paired rows therefrom.
SUMMARY OF THE INVENTION
According to one aspect of the invention there is provided a furrowing tip
body arranged for use in a paired row opener, the paired row opener having an
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opener body comprising a shank mount arranged to support the opener body on an
implement shank for movement therewith in a forward working direction and a
primary
delivery passage extending through the opener body so as to be arranged to
deliver a
primary particulate material therethrough, the furrowing tip body comprising:
a tip mount arranged to support the tip body on the opener body of the
paired row opener;
a knife portion projecting forwardly from the tip mount to a forward end
of the tip body;
a pair of wing portions projecting rearwardly and laterally outwardly from
opposing sides of the knife portion;
a central chamber positioned rearwardly of the knife portion between the
pair of wing portions and arranged to communicate with the primary delivery
passage
of the opener body to receive the primary particulate material therefrom;
a bottom wall substantially spanning a bottom side of the central
chamber; and
a pair of outlet openings at laterally spaced apart positions at a rear end
of the tip body so as to be substantially in a rear face of the tip body, the
outlet
openings being in communication with the central chamber so as to be arranged
to
dispense the primary particulate material from the central chamber into a pair
of
laterally spaced apart rows;
the tip mount being readily separable from the opener body such that
the knife portion, the wing portions, the bottom wall and the rear face which
substantially locates the outlet openings therein are separable from the
opener body
together with one another.
By positioning the central chamber where material is split into paired
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rows at a location between the wing portions, the central chamber is
substantially
enclosed at outer sides thereof by the wing portions, while a bottom wall
serves to
enclose the bottom side of the central chamber. In this manner, the central
opening is
only open at the outlet openings in the rear face of the tip body to prevent
mud from
entering the central chamber from the sides or from below while forming a
furrow and
thereby prevent plugging of the central chamber even in wet field conditions.
The bottom wall preferably extends between the wing portions to the
rear end of the tip body.
A plane of each of the outlet openings in the rear face of the tip body is
preferably in a vertical orientation, substantially coplanar with the other
outlet opening
so as to be perpendicular to the forward working direction.
A top side and outer sides of the central chamber may be arranged to
be substantially enclosed by the wing portions which extend rearward to the
rear face
of the tip body at the rear end of the tip body to respective upright rear
edges lying
substantially in a plane of the openings in the rear face of the tip body.
The upright rear edges of the wing portions may be near vertical.
The knife portion and the wing portions preferably extend downwardly
below the bottom wall which may be substantially horizontal along a bottom
side of
the tip body.
When each wing portion has a first forward portion having a leading
edge extending rearwardly at an outward incline and a second rearward portion
having an outer edge extending rearwardly from the leading edge of the first
forward
portion, the bottom wall of the central chamber preferably spans between the
outer
edges of the pair of wing portions. The outer edges of the second rearward
portions
of the wing portions may be substantially parallel to one another and the
forward
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working direction.
Each wing portion may also have a first forward portion having an upper
surface extending rearwardly at an upward incline and a second rearward
portion
having an upper surface extending rearwardly from the upper surface of the
first
forward portion at an upward incline which is more vertical than the upper
surface of
the first forward portion. In this instance, the bottom wall of the central
chamber
preferably spans between the second rearward portions of the pair of wing
portions.
The second rearward portions of the wing portions may extend
rearwardly to a rearmost end of the tip body.
Each of the outlet openings may have a height which is near a lateral
width of the opening.
One embodiment of the invention will now be described in conjunction
with the accompanying drawings in which:
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a side elevational view of the furrowing tip body supported on
an opener body in a paired row opener.
Figure 2 is a rear perspective view of the furrowing tip body in the paired
row opener according to Figure 1.
Figure 3 is a bottom plan view of the furrowing tip body in the paired row
opener according to Figure 1.
Figure 4 is a top perspective view of the furrowing tip body of Figure 1
shown separated from the opener body.
Figure 5 is a bottom perspective view of the furrowing tip body.
Figure 6 is a side elevational view of the furrowing tip body.
Figure 7 is a top plan view of the furrowing tip body.
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Figure 8 is a rear elevational view of the furrowing tip body.
In the drawings like characters of reference indicate corresponding parts
in the different figures.
DETAILED DESCRIPTION
5 Referring to the accompanying figures there is illustrated a
furrowing tip
body generally indicated by reference numeral 10. The tip body 10 is arranged
for use
with a paired row opener 12 of the type which is suited for mounting on a
implement
shank 14 of an agricultural cultivator operated in a forward working direction
in use.
The opener 12 comprises an opener body 16 including a shank mount
18 arranged for mounting onto the shank 14 using suitable fasteners. The
opener also
includes a primary delivery passage 20 and a secondary delivery passage 22
arranged for delivering respective materials therethrough, for example
particulate
seed or particulate fertilizer and the like.
In the illustrated embodiment the primary delivery passage 20 extends
along a front side of the shank mount 18 to be located at the front of the
opener body
16 while the secondary delivery passage 22 is arranged to be supported
rearwardly of
the shank mount for delivering the secondary material therethrough at a
location
spaced rearwardly of the implement shank. In further embodiments both delivery
passages may be mounted ahead of the shank mount or rearwardly of the shank
mount. In either instance the opener body 16 extends downwardly and forwardly
to a
bottom end supporting a lug 24 thereon which projects downwardly and forwardly
for
supporting the tip body 10 thereon.
The furrowing tip body 10 comprises a cast member forming a tip mount
26 therein in the form of a socket arranged to receive the lug 24 of the
opener body
therein. The socket defining the tip mount 26 and the lug 24 are arranged for
close
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mating configuration with one another such that transverse mounting apertures
28
extending through the tip mount 26 and the lug 24 are arranged to align with
one
another in the mated position of the tip body on the opener body to receive a
suitable
mounting pin 30 which retains the tip body on the opener body. Removal of the
pin 30
permits the tip body to be readily separated from the opener body.
The tip body is narrow between two generally parallel opposing side
walls 32 extending along opposing sides of the tip mount 26 defined
therebetween.
The side walls 32 extend forwardly from the tip mount to define a knife
portion 34 of
similar width as the tip mount 26 which extends downwardly and forwardly to a
bottom
mating edge 36 of the knife portion which forms a lowermost portion of the tip
body.
The leading edge 36 includes a pointed carbide tip 38 secured thereon forming
the
leading edge of the knife portion. The bottom apex of the knife portion is
aligned with
the socket forming the tip mount 26 so that knife portion is aligned with the
opener
body and the implement shank upon which it is supported.
Two wing portions 40 are supported to extend generally rearwardly and
laterally outwardly from opposing sides of the knife portion. Each wing
portion
includes a first forward portion 42 having a leading edge 44 which extends
laterally
outwardly and rearwardly from the side wall 32 of the knife portion from a
location
positioned upwardly and rearwardly from the leading edge of the knife portion.
The
leading edge 44 of each wing portion is near horizontal in orientation,
locating a
suitable carbide insert 46 along the edge thereof. The forward portion 42 of
each wing
portion also includes an upper surface 48 which extends generally upwardly and
rearwardly from the leading edge 44 thereof to a rear edge joined with a
respective
second rearward portion 50 of the wing portion 40.
The second rearward portion 50 of each wing portion includes an outer
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edge 52 which extends rearward from a rear end of the leading edge 44 of the
corresponding first forward portion such that the outer edge extends rearward
substantially parallel to the other outer edge 52 and parallel to the forward
working
direction. The outer edge 52 further extends rearward along the bottom of the
tip body
in a near horizontal orientation to a rearmost end of the tip body 10.
The second rearward portion 50 of each wing portion also includes an
upper surface 54 which extends rearwardly at an upward incline from the rear
edge of
the corresponding upper surface of the first forward portion 32 of the wing
portion.
The upper surface 44 of the second rearward portion 50 extends rearward at an
upward incline which is more vertical than the upper and rearward incline of
the first
forward portion. The upper surface 54 extends to a rear edge which is adjacent
the
rearmost end of the tip body.
At an outer side 56 of each rearward portion 50 the upper surface 54
extends to an upright rear edge 58 of the wing portion which is near vertical
in
orientation at the rearmost end of the tip body so as to be generally in a
common
plane with a rear face 60 of the tip body.
The tip body also includes a central chamber 62 centrally located
between the two wing portions 40 rearward of the tip mount 26. The central
chamber
62 includes a top opening 64 which opens through the top end thereof for
communication with the open bottom end of the primary delivery passage 20 of
the
opener body directly thereabove. The central chamber 62 is thus suitably
arranged to
receive a primary particulate material from the primary delivery passage 20 of
the
opener body. The central chamber 62 serves to split the material received
therein into
a pair of rows which are laterally spaced apart when dispensed through two
outlet
openings 66 located in the rear face 60 at the rearmost end of the tip body.
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The central chamber 62 is arranged to be enclosed along the bottom
side thereof by a bottom wall 68 which spans substantially a full bottom of
the
chamber between both the first and second portions of the wing portions 40
from the
knife portion at the forward end of the tip body to the rear face 60 at the
rearmost end
of the tip body.
The central chamber is further enclosed along the rear side thereof by a
rear wall 70 between the two outlet openings 66 which serves to define the
lateral
spacing between the outlet openings 66. The rear wall 70 extends vertically
upward
from the bottom wall 68 at the rearmost end of the tip body to define the rear
face 60
in a common plane with the upright rear edges 58 of the wing portions 40.
A substantial portion of the top of the central chamber 62 is enclosed by
the rearward portions 50 of the two wing portions 40 which extend upwardly and
inwardly from the respective outer edge 52 to respective inner edges 72 of the
wings
which are arranged to be abutted against opposing sides of the opener body so
that
the only opening in the top side of the central chamber 62 is arranged to be
occupied
by the opener body and the primary delivery passage 20 extending therethrough
in
communication with the central chamber.
The two outlet openings 66 are arranged such that a plane of each
opening is oriented in the vertical rear face at the rearmost end of the tip
body
generally perpendicular to the forward working direction and in a common plane
with
one another, with the upright rear edges of the wings and with the rear face
60. The
upright rear edges of the wing portions and the upright edge of the rear wall
70
terminate at respective upper free edges arranged to abut the opener body when
the
tip body is mounted on the opener body such that the outlet openings 66 remain
open
through the top end of the tip body.
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The top of the outlet openings 66 in the assembled position are thus
defined by the opener body received between the wing portions and the rear
wall 70.
The inner edges of the two outlet openings 66 are defined by opposing edges of
the
rear wall 70 whereas the outer edges of the outlet openings are defined by the
upright
rear edges of the wings. The bottom wall 68 defines the bottom edge of the
outlet
openings. In the illustrated embodiment the height of the openings is near but
slightly
greater than a lateral width of each opening between opposing sides thereof.
The bottom wall 68 includes a substantially flat bottom side 74 which is
near horizontal from the knife portion at the front of the tip body to the
rear edge at the
rearmost end of the tip body, as well as between the two opposing outer edges
52 of
the wing portions. The leading edge of the knife portion and the leading edges
of the
two wing portions are arranged to project downwardly below the bottom side of
the
bottom wall.
An inner top side of the bottom wall 68 include a central ridge 76 formed
thereon to extend in the longitudinal direction while being centered in the
lateral
direction between the outer edges 52 to define two opposing sloping surfaces
which
extend downwardly and outwardly from opposing sides of the central ridge 76
towards
the two outlet openings 66 respectively. The central ridge 76 thus serves to
split the
seed received in the central chamber from the primary delivery passage 20 so
that
seed is deflected or diverted into two laterally spaced apart rows exiting
from the two
outlet openings 66 respectively.
The tip mount 26, the knife portion 34, the wing portions 40, the bottom
wall 68 and the rear wall 70 are all cast together as an integral tip body
which is
selectively mounted on the lug 24 of the opener body and secured by a single
mounting pin 30 such that removal of the mounting pin permits all of the
components
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of the tip body to be readily separated from the opener body together for
replacement
as may be desired.
Once the tip body is attached on the opener body on an implement
shank, fertilizer can be fed through the secondary delivery passage 22 to be
6 deposited centrally behind the tip body for alignment with the deepest part
of the
furrower formed by the knife portion which projects downwardly below the wing
portions. Seed deposited in the primary delivery passage 20 is communicated
into the
central chamber of the tip body where the seed is split on the central ridge
to be
deflected into a pair of rows deposited through the outlet openings 60 in the
rear face
10 of the tip body. The configuration of the bottom wall and the wing
portions ensures
that the central chamber is substantially fully enclosed about respective top,
bottom
and outer sides thereof so that the only openings in communication with the
central
chamber are the outlet openings in the rear face which are well protected from
dirt
being displaced by the formation of the furrow. In this manner, even in wet
conditions,
mud and debris is unlikely to enter the outlet openings so that plugging of
the primary
delivery passage 20, the central chamber 62 and the outlet openings 66 is
thereby
substantially prevented.
=
After extended use, the only components which typically suffer from any
substantial wearing are the knife portion and the wing portions which can be
readily
replaced by removing a single fastener through the cooperating apertures of
the tip
mount and corresponding lug of the opener body respectively. A replacement tip
body
can then be mounted onto the lug of the opener body and a mounting pin
inserted
through the cooperating apertures once again for securement on the opener
body.
Since various modifications can be made in my invention as herein
above described, and many apparently widely different embodiments of same made
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within the spirit and scope of the claims without department from such spirit
and
scope, it is intended that all matter contained in the accompanying
specification shall
be interpreted as illustrative only and not in a limiting sense.
