U.S. patent application number 11/291278 was filed with the patent office on 2006-06-22 for apparatus for stunning poultry.
This patent application is currently assigned to Rico Research B. V.. Invention is credited to Henderikus Koops.
Application Number | 20060135053 11/291278 |
Document ID | / |
Family ID | 34930000 |
Filed Date | 2006-06-22 |
United States Patent
Application |
20060135053 |
Kind Code |
A1 |
Koops; Henderikus |
June 22, 2006 |
Apparatus for stunning poultry
Abstract
An apparatus for stunning poultry is provided, comprising a
power source. A first device connected to a first pole of the power
source for engaging the poultry and a probe connected to a second
pole of the power source and configured for at least partially
entering the vent of the poultry. The probe can have an enlarged
head that is cone-shaped.
Inventors: |
Koops; Henderikus; (Ede,
NL) |
Correspondence
Address: |
WESTMAN CHAMPLIN & KELLY, P.A.
SUITE 1400 - INTERNATIONAL CENTRE
900 SECOND AVENUE SOUTH
MINNEAPOLIS
MN
55402-3319
US
|
Assignee: |
Rico Research B. V.
Wormer
NL
|
Family ID: |
34930000 |
Appl. No.: |
11/291278 |
Filed: |
December 1, 2005 |
Current U.S.
Class: |
452/58 |
Current CPC
Class: |
A22B 3/086 20130101;
A22B 3/06 20130101 |
Class at
Publication: |
452/058 |
International
Class: |
A22B 3/06 20060101
A22B003/06 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 6, 2004 |
EP |
04106325.6 |
Claims
1. An apparatus for stunning poultry, comprising a power source, a
first device connected to a first pole of the power source for
engaging the poultry and a second device connected to a second pole
of the power source for engaging another body part of the poultry,
the second device comprising a probe configured for at least
partially entering the vent of the poultry.
2. The apparatus according to claim 1, wherein the probe comprises
an elongate rod of which the forward end is provided with an
enlarged head.
3. The apparatus according to claim 2, wherein the enlarged head is
cone-shaped, with the tip of the cone facing forward.
4. The apparatus according to claim 3, wherein the tip of the cone
is rounded.
5. The apparatus according to claim 3, wherein the cone has a
rearward facing surface which is rounded.
6. The apparatus according to claim 1, wherein at least the part of
the probe meant for entering the vent of the poultry has a highly
polished surface.
7. The apparatus according to claim 1 and meant for cooperation
with a suspension conveyor for conveying the poultry while
suspended from their legs, the apparatus further comprising a
rotating carousel-like device which carries at regular intervals
along its circumference a number of probes, wherein the apparatus
is configured to provide a relative upward and downward movement
between the probes and the poultry when the suspension conveyor
conveys the poultry around part of the circumference of the
carousel-like device.
8. The apparatus according to claim 7, wherein the probes are
movable upwards and downwards along respective guides through the
cooperation between a stationary curve and movable follower
attached to the probes.
9. The apparatus according to claim 7, wherein the poultry is
movable upwards and downwards through an appropriate shape of the
suspension conveyor.
10. The apparatus according to claim 1, wherein the first device
comprises an electrically conductive liquid in which the head of
the poultry is to be submerged, and wherein the liquid is contained
in a number of successive containers, such that during operation of
the apparatus each separate container will receive only one poultry
head.
11. The apparatus according to claim 10 and meant for cooperation
with a suspension conveyor for conveying the poultry while
suspended from their legs, the apparatus further comprising a
rotating carousel-like device which carries at regular intervals
along its circumference a number of liquid containers, wherein the
apparatus is configured to provide a relative upward and downward
movement between the containers and the poultry when the suspension
conveyor conveys the poultry around part of the circumference of
the carousel-like device.
12. The apparatus according to claim 11, wherein the liquid
containers are movable upwards and downwards along respective
guides through the cooperation between a stationary curve and
movable follower attached to the containers.
13. The apparatus according to claim 11, wherein the poultry is
movable upwards and downwards through an appropriate shape of the
suspension conveyor.
Description
BACKGROUND OF THE INVENTION
[0001] The invention relates to an apparatus for stunning poultry,
comprising a power source, a first device connected to a first pole
of the power source for engaging the poultry and a second device
connected to the opposite pole of the power source for engaging
another body part of the poultry.
[0002] Although not strictly necessary, in practice the first
device of such an apparatus for stunning poultry will be connected
to the positive pole of the power source, while the second device
is connected to the negative pole of the power source. In a known
apparatus of this type said second devices are connected to a
suspension conveyor for conveying the poultry while suspended from
their legs. Thus, the negative pole of the power source then will
engage the legs of the poultry.
[0003] Such an apparatus will encounter a severe problem, because
the legs of poultry are covered with a thick skin which only poorly
conducts electrical current. Thus, for obtaining satisfying
stunning results one should apply high voltages. However, in the
case that such high voltage are applied and, unexpectedly, the skin
of the legs is better conductive than expected, such high voltages
can cause damage to the poultry, which negatively influences the
quality of the flesh after slaughtering. Especially, in such a case
strong contractions of the breast muscles will occur which will
lead to bleedings which give the final product (breast flesh) an
unattractive appearance.
SUMMARY OF THE INVENTION
[0004] In accordance with an aspect of the present invention, an
apparatus for stunning poultry includes a probe for at least
partially entering the vent of the poultry.
[0005] The interior of the vent of the poultry always is moist in
some degree, such that an excellent conduction of the electric
current form the probe towards the poultry will occur. However, not
only will the conductivity be increased, but it also will be more
stable among a series of poultry, such that it can be predicted
more precisely. The result is, that a more precise setting of the
voltage between the first and second pole of the power source can
be chosen, leading to reproducible results.
[0006] In one embodiment of the apparatus according to the present
invention the probe comprises an elongate rod of which the forward
end is provided with an enlarged head.
[0007] In the context of the present application "forward end"
means the end of the elongate rod which will be inserted into the
vent of the poultry first, i.e. the end of the elongate rod which
is the leading end as seen in the direction of insertion.
[0008] Such an enlarged head has to be pushed past the orbicular
muscle of the poultry, such that, once inserted, the probe obtains
a stable positioning with an effective conductive contact between
its surface and the surrounding vent.
[0009] When, in such a case, the enlarged head is cone-shaped, with
the tip of the cone facing forward, inserting the probe into the
vent of the poultry is promoted, because, firstly, the cone-shape
provides for a locating effect of the probe relative to the vent,
and, secondly, the cone-shape of the probe promotes a temporarily
stretching of the orbicular muscle when the widest part of the
cone-shaped head passes said muscle.
[0010] For avoiding damage to the vent region of the bird it is
preferred, that the tip of the cone can be rounded.
[0011] Further, it is possible that the cone has a rear-wards
facing surface which is rounded, such that withdrawing the probe
from the vent after stunning of the poultry has occurred, is
promoted without the risk of damaging (tearing) the vent region of
the poultry.
[0012] The stunning effect of the apparatus according to the
present invention can be optimised when, in accordance with yet
another embodiment, at least the part of the probe meant for
entering the vent of the poultry has a highly polished surface.
Such a highly polished surface promotes the conductivity of the
probe.
[0013] In still another embodiment of the apparatus according to
the present invention, the apparatus is meant for cooperation with
a suspension conveyor for conveying the poultry while suspended
from their legs, and comprises a rotating carrousel-like device
which carries at regular intervals along its circumference a number
of probes, wherein a relative upward and downward movement between
the probes and the poultry occurs when the suspension conveyor
conveys the poultry around part of the circumference of the
carousel-like device.
[0014] When a bird suspended from the suspension conveyor
approaches the carousel-like device, the relative position between
the vent of the bird and the assigned probe is such, that the probe
assumes a position at a higher level than the vent. During movement
of the bird around part of the circumference of the carousel-like
device, the relative position between the vent of the bird and
probe changes such that the probe firstly will enter the vent and
next again will leave the vent. In the position within the vent the
power source is activated and the poultry is stunned. When the
probe has been withdrawn from the vent, the bird, being suspended
from the suspension conveyor, leaves the circumference of the
carousel-like device.
[0015] Two possibilities occur: firstly the probes can be movable
upwards and downwards along respective guides through the
cooperation between a stationary curve and movable follower
attached to the probes. In such a case the poultry substantially
maintains a position at a constant level. Secondly, the poultry may
be moved upwards and downwards through an appropriate shape of the
suspension conveyor, in which case the probes substantially
maintain a constant level. However, also a combination of these two
possibilities may be realised.
[0016] When, as is known from the state of the art, the apparatus
is of the type in which the first device comprises an electrically
conductive liquid in which the head of the poultry is to be
submerged, another problem may arise. In a state of the art
apparatus of such a type a large liquid container is used in which
a number of birds are submerged simultaneously. As a result, a
certain electrical current will run through each bird. However,
when such an apparatus is started up after a period of stand-still,
firstly only one bird will be submerged in the liquid, and the
number of submerged birds will then gradually increase. When only
one or few birds are submerged, a much stronger current will run
through those birds, having corresponding detrimental effects as
described above with respect to an increase of the voltage.
[0017] Thus, for providing a solution for such a problem, in
accordance with another aspect of the present invention an
embodiment of the apparatus is presented, in which the liquid is
contained in a number of successive containers, such that during
operation of the apparatus each separate container will receive
only one poultry head simultaneously. Because each container only
receives one poultry head simultaneously, the electrical current
running through such a poultry head always will be the same,
irrespective whether the apparatus is starting up or already in
full operation.
[0018] When, in such a case, the apparatus is meant for cooperation
with a suspension conveyor for conveying the poultry while
suspended from their legs, it comprises a rotating carousel-like
device which carries at regular intervals along its circumference a
number of liquid containers, wherein a relative upward and downward
movement between the containers and the poultry occurs when the
suspension conveyor conveys the poultry around part of the
circumference of the carousel-like device.
[0019] Again, two possibilities occur: the liquid containers are
movable upwards and downwards along respective guides through the
cooperation between a stationary curve and movable follower
attached to the containers (in which case basically the poultry are
maintained at a constant level), or the poultry is movable upwards
and downwards through an appropriate shape of the suspension
conveyor (in which case the liquid containers are maintained
substantially at a constant level). Again, a combination of these
possibilities may be applied.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Hereinafter the invention will be elucidated while referring
to the drawing, in which an embodiment of the apparatus according
to the present invention is illustrated.
[0021] FIG. 1 shows, schematically, a side elevational view of an
embodiment of the apparatus;
[0022] FIG. 2 shows, on a reduced scale and extremely
schematically, a top plan view, and
[0023] FIG. 3 shows on an enlarged scale a detail of a probe.
DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENT
[0024] Firstly referring to FIG. 1, an embodiment of an apparatus
for stunning poultry is illustrated which is meant for cooperation
with a suspension conveyor 1. Such a suspension conveyor, which is
known per se, comprises shackles 2 from which poultry 3 is
suspended from their legs 4. That means that the head 5 of the
poultry 3 is directed downwards.
[0025] In the illustrated embodiment an apparatus according to the
present invention comprises a rotating carousel-like device which
is provided with a stationary core 6. In a manner not illustrated
in detail this stationary core 6 carries a frame which can be
rotated around a central axis 7. In FIG. 2 the direction of
rotation of the frame around the central axis 7 has been indicated
by arrow 8. Likewise, the direction of travel of the suspension
conveyor 1 has been indicated by arrow 9. As illustrated, the
suspension conveyor 9 partly encircles the carousel-like
device.
[0026] Again referring to FIG. 1, the frame of the carousel-like
device comprises an upper support plate 10 and a lower support
plate 11. Between these support plates 10 and 11 pairs of guiding
rods 12 extend vertically. As illustrated clearly in FIG. 2, a
number of said pairs of guiding rods 12 is spaced at regular
intervals along the circumference of the carousel-like device. In
the embodiment illustrated schematically in FIG. 2 eight of such
pairs are provided; in FIG. 1, however, some of these pairs have
been omitted for simplifying the drawing.
[0027] The guiding rods 12 illustrated in FIG. 1 at the right-hand
side correspond with the guiding rods 12 at the three o'clock
position in FIG. 2; likewise the guiding rods 12 positioned
centrally in FIG. 1 correspond with the guiding rods at the six
o'clock position in FIG. 2, whereas the guiding rods 12 at the
left-hand position in FIG. 1 correspond with the nine o'clock
position in FIG. 2.
[0028] Each pair of guiding rods 12 firstly carries an upper
sliding block 13 which carries a follower roll 14 that cooperates
with a stationary curve 15 in the stationary core 6. Further each
pair of guiding rods 12 carries a second sliding block 16 which
carries a follower roll 17 that cooperates with a stationary curve
18 in the stationery core 6.
[0029] The upper sliding block 13 carries a second device used to
stun the poultry, herein comprising a probe 19 which is meant for
insertion into the vent of the poultry 3; the lower sliding block
16 is shaped as a liquid container containing a conductive fluid
20. In one embodiment, a separate container of conductive fluid 20
is provided for each poultry. The conductive fluid 20 comprises a
first device used to stun poultry. In an alternative embodiment, a
container having conductive fluid for receiving two or more poultry
heads can be used. As appreciated by those skilled in the art, in
some embodiments, the first device can take many forms with the
requirement only that the first device engages the poultry in a
manner to make an electrical connection.
[0030] The curve 15, roll 14, sliding block 13 and probe 19 are
made of a conductive material, such that through line 26 the probe
19 is connected to a first pole of the power source 27, preferably
the negative pole. Likewise, the conductive fluid 20 is connected
to the opposite pole (preferably the positive pole) of the power
source 27 through line 28, curve 18, roll 17 and sliding block
16.
[0031] In operation poultry 3, which is conveyed by the suspension
conveyor 1, reaches the carousel-like device at the three o'clock
position illustrated in FIG. 2. As shown in FIG. 1, in this
position the upper sliding block 13 is at a high position, in which
the probe 19 does not engage the poultry 3. Likewise the lower
sliding block (liquid container) 16 is in a low position, in which
the head 5 of the poultry 3 is above the conductive liquid 20. When
the frame of the device rotates as indicated by arrow 8 in FIG. 2,
the follower rolls 14 and 17 of the sliding blocks 13 and 16,
respectively, will follow the respective stationary curves 15 and
18, respectively, and will move downwardly and upwardly,
respectively, to the positions illustrated in FIG. 1 in the central
location. In these positions the probe 19 has entered the vent of
the poultry 3, whereas the head 5 of the poultry is submerged in
the conductive fluid 20 in the liquid container 16. Now the power
source is activated and an electrical current runs through the body
of the poultry, stunning the bird.
[0032] During a continued rotation of the device the upper sliding
block 13 again will move to its high position, whereas the liquid
container 16 will move towards its low position, in which the bird
3 again is free (in FIG. 1 the bird has not been illustrated in
this location, but it will assume a position which corresponds with
the position illustrates at the right-hand side of the figure).
[0033] Each successive bird arriving along the suspension conveyor
1 will be processed in this manner.
[0034] It is also possible that the poultry is movable upwards and
downwards through an appropriate shape of the suspension conveyor
1. The shape 1' thereof will correspond with the shape 15' of the
upper curve and shape 18' of the lower curve to obtain the
appropriate relative movements between the poultry 3, probe 19 and
container 16. Likewise the shape 1'' thereof will correspond with
the shape 15'' of the upper curve and shape 18'' of the lower
curve.
[0035] In FIG. 1 further a support 21 has been illustrated
schematically, which serves for locating and maintaining the
poultry 3 in a correct position. Such support may be stationary,
but also can be movable with the poultry, for example under
influence of the cooperation between the curve and the
follower.
[0036] FIG. 3 shows part of the probe 19. It comprises an elongate
rod 22 of which the forward end is provided with an enlarged head
23. The enlarged head is cone-shaped, with the tip 24 of the cone
facing forward. In the illustrated embodiment the tip of the cone
is rounded.
[0037] Further the cone has a rearwardly facing surface 25 which
also is rounded.
[0038] The operative surfaces of the probe (especially the surface
of the cone-shaped head 23) preferably are highly polished.
[0039] The probe 19 will enter the vent of a bird 3 with its
cone-shaped head 23, and will realise a good conductive interface
for an electrical current.
[0040] The invention is not limited to the embodiment described
before, which may be varied widely within the scope on the
invention as defined by the appending claims.
* * * * *