Abstract:
A device for feeding poultry kept in a barn, comprises at least one food supply tube ( 1 ) which is held above the floor of the barn such as to be able to be lowered or raised, with a series of branch openings, each provided with a dish device ( 2 ) hanging on the supply tube, comprising a dropping tube extending from the branch opening and a feeding dish ( 4 ) arranged below, the dropping tube with a spoked arrangement of lattice bars ( 5 ) forming the cup of the dish. The dropping tube comprises an inner cylinder ( 7 ) leading off from the branch opening and an outer cylinder ( 8 ) surrounding the inner cylinder, from which the dish hangs by means of the lattice bars, such as to be placed on the floor of the barn in the lowered state of the food supply tube. The outer cylinder runs on the inner cylinder such as to rotate, be raised or lowered and at least one stop is provided for limiting the raising and lowering stoke. The outer and the inner cylinder each comprise adjacent cylindrical sections ( 8′, 8, 7′, 7 ) coaxial to each other, whereby front face regions of the cylinder sections turned to face other are connected to each other by means of bridging bodies (9, 23), which bridge a gap region corresponding to the separation between the cylinder sections.

Description:
CROSS-REFERENCE TO RELATED APPLICATION  
       [0001]     This application claims priority to German Application 101 64 100.1 entitled DEVICE FOR THE FEEDING OF POULTRY, FATTENED POULTRY IN PARTICULAR, AND ESPECIALLY BROILERS, which was filed on Dec. 24, 2001.  
       BACKGROUND OF THE INVENTION  
       [0002]     The invention relates to a device for the feeding of free-range poultry kept in coops, fattening poultry in particular, and especially broilers, with at least one feed delivery pipe held above the floor of the coop in a raisable and lowerable manner. The feed delivery pipe has a series of branch apertures, of which each is allocated to a bowl device suspended on the delivery pipe, which features a downpipe descending from the branch aperture and a feed bowl located beneath the delivery pipe. Bowl cupolas are formed from grid bard running in spoke fashion, whereby the downpipe consists of an inner cylinder departing from the branch aperture and an outer cylinder surrounding the inner cylinder, to which the feed bowl is suspended by means of the grid bars of its bowl cupola in such a way that it comes to rest when the feed delivery pipe is lowered, coming to rest in particular on the floor of the coop. The outer cylinder is guided in relation to the inner cylinder so as to be rotatable as well as capable of being raised and lowered, and is provided with at least one raising stop delimiting the raising and lowering travel.  
         [0003]     A device of the generic type referred to is shown in EP 0 105 571 B1.  
         [0004]     When the feed bowl of the known device comes to rest with the lowering of the feed pipe, apertures in the downpipe can be cleared. As a result of this, depending on the individual position of the apertures in relation to the feed bowl, it is possible to allocate different discharge cones and discharge heights to the feed passing via the downpipe into the feed bowl. In order, for example, to provide chicks with improved eating conditions, a higher discharge height and therefore a high feed level to the bowl is necessary, which can be achieved by clearing further apertures in the downpipe with the known device. In accordance with the growth of the chicks, the feed level in the bowl can also be set lower because growing animals can easily reach areas located lower in the feed bowls than chicks are capable of for the purpose of acquiring feed.  
         [0005]     Devices installed in a coop should be as free of maintenance as possible. Accordingly, the most uniform refill of the feed is desired, while still remaining free of interruption, in predetermined metering volumes in each case into each individual feed bowl. With the known device, however, interruptions may arise in that feed emerges irregularly from the downpipe into the feed bowls, as a result, for example, of the corresponding outlet apertures becoming closed in the casing surface of the downpipe. This is the case in particular with feed which is prone to form bridges, for example with feed with poor sprinkle behavior.  
         [0006]     In addition to this, the outer pipe is capable of rotating in relation to the inner pipe, as a result of which the cross-section of an additional outlet aperture in the downpipe is reduced, because an aperture in the outer cylinder is no longer congruent, or only partially, with the aperture allocated to it in the inner cylinder.  
         [0007]     Feed bowls should be cleaned at regular intervals. This is effected by spraying with water, at least after a fattening period, before the coop is occupied by new chicks. During the spraying process, it is advantageous for the feed bowl to be capable of rotation about the longitudinal axis of the fall pipe deriving from the feed pipe, because in this situation practically all inner areas of the feed bowl run past a sharp water jet directed from one side into the feed bowl. While the possibility of the feed bowl to rotate on the inner cylinder of the downpipe is still advantageous for cleaning, it is nevertheless disadvantageous, for the reasons described heretofore, for keeping clear the additional apertures in the downpipe. A further disadvantage of the free rotation of the feed bowl lies in the fact that a predetermined distance interval between the feed bowl and the free end of the downpipe, on which the feed level desired in each case is dependent, may be unintentionally wrongly adjusted due to the rotational movement during cleaning.  
       SUMMARY OF THE INVENTION  
       [0008]     The invention is based on the problem of avoiding these disadvantages by means of a device for the feeding of poultry, as described in the Background of the Invention.  
         [0009]     With the device according to the invention, both the outer cylinder and the inner cylinder consist in each case of cylinder sections adjacent to one another and coaxial to one another, whereby the face periphery areas of the cylinder sections, turned towards one another, are connected to one another by means of bridging elements, which bridge a gap area which corresponds to the distance interval between the cylinder sections.  
         [0010]     It has been shown that, during a fattening period, with an initial feed level for chicks and another feed level for broilers, in the final analysis therefore with only two feed level positions in the feed bowl, adequate fattening results can be achieved, so that, with a subdivision of the inner cylinder and the outer cylinder into two cylinder sections in each case, a simple design is provided that has adequate operational reliability.  
         [0011]     The gap interval between two cylinder sections of the inner cylinder or the outer cylinder respectively forms an additional aperture for the emergence of feed into the feed bowl, also referred to here as a “360° window,” which is located next to the lower free end of the downpipe formed from the inner cylinder and outer cylinder. Each gap interval between the cylinder sections forms a free circumferential aperture, which is only interrupted by the bridge elements. These, however, without any losses in strength or stability needing to be taken into account, can be kept so thin that their thickness, and therefore their cross-section, reduces the free aperture width of the 360° window formed in a virtually imperceptible manner. Even with unfavorable circumstances, it is therefore possible to arrive at a situation with hardly any bridging formations or blockages in the area pertaining as the 360° window of the additional apertures in the casing of the downpipe or its cylinder respectively.  
         [0012]     On the actuation of the delivery device installed in the feed delivery pipe, e.g. a dragline or a spiral feed device, it is guaranteed with the device designed according to the invention that each feed bowl will also be reliably filled up to the predetermined feed level. The risk will hardly arise any longer of individual feed bowls remaining empty, in particular in the critical initial stage of the fattening period for chicks which are still small, due to blockages in the area of the additional apertures in the downpipe.  
         [0013]     The feed delivery pipe, usually running vertical and therefore parallel to the floor of the coop, can be moved perpendicularly, for example by means of traction cables capable of being centrally actuated. With the known device, this actuation makes it possible for the feed bowl to be brought into positions in which it rests either on the floor of the coop or is raised off of it. In the same manner as with the known device, the setting of the feed bowl on the floor of the coop is used to displace the outer cylinder vertically to the inner cylinder, and, by means of this displacement travel, to open an additional feed discharge aperture, namely the 360° circumferential window, in the downpipe. With this means of effect, comparable to the prior art, with the device according to the invention in a further embodiment, however, a situation is reached in which the end-side cylinder section covers the gap area between the cylinder sections of the outer cylinder when the outer cylinder is moved by means of a raising of the feed delivery pipe into a position which is lowered in relation to the inner cylinder, in which the lifting stops of the inner and outer cylinder are in mutually opposed positions. It can be seen that the formation of the 360° window has the advantage that, even in the ground resting position, in which the window is cleared, possible rotation of the feed bowl in relation to the inner cylinder which may arise will not have any disadvantageous effect on the feed outflow through the 360° window.  
         [0014]     In order to prevent the possibility of the outer pipe with the feed bowl falling away from the inner cylinder when the feed delivery pipe is raised, at least one lifting stop is provided for. With the device according to the invention, a recess in the inner surface of the cylinder plays a part in the formation of the lifting stop of the outer cylinder, as well as at least one contact shoulder for the recess, projecting radially from the inner cylinder. If the inner cylinder is raised, in that the feed delivery pipe is brought into a greater distance interval from the floor of the coop, the inner cylinder initially slides in the outer cylinder as far as the contact shoulder projecting from the inner cylinder, against which the step formed by the recess in the outer cylinder comes in contact, so that, with the further raising of the inner cylinder, the outer cylinder and therefore the feed bowl connected to it can be drawn along together. In this position, therefore, the parts of the inner cylinder and the outer cylinder participating in the formation of the lifting stops are in a mutually-opposed position, and the end-side cylinder section of the inner cylinder covers the gap area between the cylinder sections of the outer cylinder. The additional aperture in the feed downpipe, the “360° window,” is closed.  
         [0015]     Each contact shoulder for the recess may be a projection arranged at random on the inner cylinder. For preference, each contact shoulder for the recess is a part of a radial projection of the inner cylinder, in the manner of a collar flange.  
         [0016]     In order for the bridging elements which connect the cylinder sections only to reduce the free opening surfaces of the “360° window” by an insignificant amount, and nevertheless to connect the cylinder sections to one another in an adequately stable and secure manner, a special design and cross-sectional shape has been selected for the bridging elements. Each bridging element is a flat web, of which the web surface plan runs radially to the axis of the inner or outer cylinder in each case. The number of flat webs can be varied. Four webs for the inner cylinder and seven webs for the outer cylinder have proved their worth. To particular advantage, the bridging elements of the outer cylinder which pertain as flat webs feature the form of paddles or vanes projecting radially over the periphery of the outer cylinder into the feed bowl. The vanes at the outer cylinder control and maintain the uniform feed distribution into the feed plates, even if the entire feed bowl is intended to swing or move in pendulum fashion about the delivery pipe, and prevent the excessive scratching and pecking of the animals in the feed, which can result in feed losses.  
         [0017]     It is intended that the feed should be discharged and distributed as uniformly as possible from the downpipe. In this situation, an overflow of the feed from the feed bowl due to an excessively high feed level is to be avoided just as too low a feed level, which impedes the feeding of the animals. For the correct metering of the feed into the bowl, it is determinant, as already mentioned, that a predetermined distribution cone be formed and maintained in the feed bowl, whereby the distribution cone can in turn be influenced by the distance interval between the feed outlet apertures present in the downpipe and the feed bowl. The distance between the feed bowl and the lower free end of the downpipe or from the “360° window” respectively therefore has a substantial influence on the feed level in the bowl, and it is in turn dependent on the feed level as to whether the feed consumption by the animals takes place in optimum fashion. The possibility of altering or adjusting the interval distance between the feed bowl and the lower free end or between the feed bowl and the “360° window” of the downpipe is advantageous, and with the device according to the invention is achieved in terms of design in that the outer surface of an upper cylinder section of the outer cylinder is designed as a threaded spindle and that the free ends of the grid bars of the bowl cupola are connected to a screw ring, which is screwed onto the area of the outer cylinder designed as a threaded spindle.  
         [0018]     The pitch of the threaded spindle is selected for preference of such a type that, even at relatively low extension or angular movement of the feed bowl, a perceptible change is noticeable between the distance between the feed bowl and the feed delivery pipe, from which the downpipe with its apertures departs.  
         [0019]     As described heretofore, the feed bowls begin to rotate about an upright axis when subjected to cleaning under a water jet. This rotation is even desirable. The rotary movement does have the disadvantage, however, that the feed level which has been set may as a result be unintentionally changed. After cleaning, all the feed bowls in the feed line in a coop would therefore have to be readjusted, which involves a considerable amount of work.  
         [0020]     The undesirable automatic change of setting or rotation of the feed bowls is prevented with the device according to the invention in that it features at least one rotational stop, which prevents or at least delimits the rotational path of the outer cylinder in relation to the inner cylinder.  
         [0021]     In this situation, the formation and arrangement are set in such a way that each rotational stop features at least one elevation arranged at a predetermined area of the outer surface of the inner cylinder, as well as at least one driver dog or projection located on the inner surface of the outer cylinder, into the rotational path of which, during the rotation of the outer cylinder about the inner cylinder, the elevation projects. If the feed bowl rotates, and therefore the outer cylinder on which the feed bowl is suspended, in relation to the inner cylinder, the projection strikes against the elevation at the latest after a predetermined rotational path has been covered, and prevents it from rotating back again.  
         [0022]     The predetermined area of the outer surface of the inner cylinder, which is provided with the elevation for the rotational stop, is the upper head part, which is offset against the other part of the inner cylinder as a result of the reduced cylinder diameter. The feed bowl and its outer cylinder can therefore only rotate freely about the inner cylinder in that position in which it is suspended above the raising stops between the outer and inner cylinder on the inner cylinder. In the upper position, i.e., in a lowered position of the feed delivery pipe and therefore also of the inner cylinder in which the feed bowl rests, and, as a result, its outer cylinder is raised in relation to the inner cylinder, the projection is, by contrast, in the area of effect of the elevation located on the upper head part of the inner cylinder, said elevation projecting into the rotational path of the projection on the outer cylinder. The outer cylinder, and therefore the feed bowl, is therefore only capable of rotation in the upper position until the rotational movement is stopped by the rotational stop.  
         [0023]     The device according to the invention is also characterized by the fact that the automatic, uncontrolled, and therefore undesirable rotation of the screw ring in relation to the outer cylinder is prevented, which would in consequence result in an incorrect setting of the feed level in the feed bowl, that the outer cylinder features, in its area designed as a threaded spindle, at least one spring-elastic engagement cam, preferably a spring elastic in the radial direction, which can engage in positive fit with cut-outs which are featured by the screw ring in its inner circumferential surface.  
         [0024]     With the device according to the invention, it is of particular inventive significance that the rotational stop, in conjunction with the areas of the inner cylinder offset in respect of the diameter, serves the purpose of blocking the specified setting of the feed level, if required, against unintentional actuation by means of the engagement cams in the suspended position or, if appropriate, in the raised position of the bowl. This is achieved in that the engagement cams and the cut-outs are provided with run-on flanks aligned obliquely to the direction of rotation about the upright axis.  
         [0025]     Because the engagement cams and the cut-outs are provided with run-on flanks aligned obliquely to the direction of rotation, the spring-elastic engagement cams are deflected with the appropriate application of force during rotation, and in a similar manner to a cam drive are deflected out of the cut-outs. After the deflection of the engagement cams from the cut-outs, the screw ring can be further rotated on the thread of the outer cylinder, whereby the feed stand position defining the feed level changes, as described heretofore. As soon as the engagement cams have reached an adjacent cut-out, they engage again into this cut-out, or the screw ring, under the repetition of the deflection movement, may rotate further.  
         [0026]     This is only possible, however, in the upper position of the outer cylinder in relation to the inner cylinder, because, due to the offset outer surface of the inner cylinder with the reduced cylinder diameter, there is sufficient room behind the engagement cams into which they can be moved during rotation and raising out of the cut-outs. In the lower suspended position, the outer surface of the inner cylinder is supported from behind against the engagement cams because of their enlarged outer diameter at that point, with the result that clearance of the feed stand positions which have been set, and raising from the cut-outs, are not possible even with the greatest exertion of force.  
         [0027]     In view of the fact that, during cleaning, the entire feed line is raised with the feed pipe, and, as a consequence, only the suspended position of the outer cylinder is provided, in this suspended position of the outer cylinder it is automatically guaranteed that the previously-set feed stand positions will be locked in place, and unintentional changing of the feed stand positions is therefore not possible. The feed bowl can however be rotated freely on the inner cylinder, in the suspended position of the outer cylinder, for the purpose of cleaning.  
         [0028]     Only in the raised position of the feed bowl and the external cylinder connected to it is an adjustment of the feed stand position possible by the rotation of the screw ring on the threaded spindle part of the outer cylinder, because only in this position can the engagement cams be deflected out of the cut-outs of the screw ring with the aid of the rotary stops, acting in the manner of a driver dog.  
         [0029]     To adjust the feed stand position which has been set, the unit consisting of the feed bowl, cupola and outer cylinder is therefore first to be raised. This unit can then be rotated about the upright axis in the direction of rotation of the desired change of the feed stand, until the point at which driver dogs present on the outer cylinder in the form of projections have reached the separation cylinder, and the outer cylinder is secured against a further rotation. In the continuation of the rotational movement, with increasing effect of force, the engagement cams release the feed stand positions, in order, after a predetermined path of rotation, to be able to engage again in the next feed stand position.  
         [0030]     To improve the cleaning effect and facilitate cleaning work, in a further embodiment of the device according to the invention there is incorporated the measure that the feed bowl features a feed plate, which in the area of the plate edge features connecting elements to connect to the bowl cupola. The connecting elements may feature a folding joint and at least one locking or retention element. Instead of a connection with the bowl cupola, the feed plate also may be formed, in the area of its plate edge, of two plate edge sections, one of which is connected to the grid bars of the bowl cupola, and which are connected to each other by means of at least one folding joint and at least one locking or retaining element, e.g. clamps. Of particular advantage is an unhookable folding joint, so that a feed plate can be replaced if necessary.  
         [0031]     The feed plate is designed to be conical in the center, so that feed falling into the feed plate from the unit of inner cylinder and outer cylinder forming the downpipe can slide outwards.  
         [0032]     To improve feed consumption by the animals, a ring surface of the feed plate, which runs around the center of the plate located beneath the downpipe, is divided into feeding sections. Each feeding section consists of at least one plate, one field, or the like by way of a shape delimited by a depression or elevation.  
         [0033]     To particular advantage, the number of feeding sections is equal to a multiple of the number of the bridging elements of the outer cylinder designed as paddles or vanes.  
         [0034]     If, for example, seven cut-outs are arranged on the inner circumference of the screw ring, then this specifies seven feed stand positions, which can be adjusted by the rotation of the screw ring in relation to the outer cylinder. The outer cylinder itself features in its thread area at least one, and preferably two, engagement cams, which are located on the circumference of the outer cylinder in such a way that they can engage simultaneously in cut-outs of the screw ring arranged for each of them. With seven possible feed stand positions, it is possible to arrange seven bridging elements at the circumference of the outer cylinder, and to design these as paddles or vanes, so that they control and maintain the uniform distribution of the feed into the feed plate. In the case of the feed plate subdivided into 14 sections, there are then two fields or pockets of the feed plate in each case between two bridging elements of the outer cylinder present in the form of vanes or paddles, so that on the one hand it is easy for the animals to take the feed and, on the other, it is rendered more difficult for them to scatter feed sideways out of the feed bowl. Because of the seven feed stand positions selected in the threaded connection between the outer cylinder and screw ring and because of the hinge connection between the feed plate and bowl cupola, the seven paddles or vanes can come into unambiguous concordance in relation to the fields or pockets of the feed plate.  
         [0035]     These and other features, advantages and objects of the present invention will be further understood and appreciated by those skilled in the art by reference to the following specification, claims and appended drawings. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0036]     An embodiment of the invention, from which further inventive features can be derived, is represented in the drawings. These show:  
         [0037]      FIG. 1  is a view of the bowl device suspended on the feed delivery pipe, for the feeding of broilers.  
         [0038]      FIG. 2  is a view of an outer cylinder.  
         [0039]      FIG. 3  is a side view of the outer cylinder according to  FIG. 2 , in a half-section.  
         [0040]      FIG. 4  is a view of the inner cylinder, with upper pipe adapter for securing to the feed delivery pipe without a closing upper part.  
         [0041]      FIG. 5  is a side view of the inner cylinder, in a half-section.  
         [0042]      FIG. 6  is a side view of the device according to  FIG. 1 , in a half-section with the feed delivery pipe raised, so that the feed bowl hangs freely above the floor of a coop.  
         [0043]      FIG. 7  is the unit of a downpipe, formed from the inner cylinder and the outer cylinder guided on this, in a sectional view along the line VII-VII in  FIG. 6 .  
         [0044]      FIG. 8  is a side view of the device with the feed delivery pipe lowered, so that the feed bowl is resting on the floor of the coop.  
         [0045]      FIG. 9  is a section through the downpipe of the device according to  FIG. 8 , consisting of inner cylinder and outer cylinder, in a section along the line IX-IX in  FIG. 8 .  
         [0046]      FIG. 10  is a view of a feed bowl, in which, to make the feed plate clearer, the bowl cupola has been removed.  
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0047]     The device for feeding free-range poultry for fattening kept in a coop, and broilers in particular, consists of at least one feed delivery pipe  1 , held above the floor of the coop in a lowerable manner, which runs along the entire length of the coop and, by means of a delivery worm element located inside it, or a cable or a chain with delivery disks, transports feed capable of scatter distribution to individual bowl devices  2  suspended on the feed delivery pipe  1 . The parts described can also be designated in their entirety as the feed line.  
         [0048]     In  FIG. 1 , only one part of the feed delivery pipe  1  is represented, with a bowl device  2  suspended in the area of a branch aperture in the feed delivery pipe  1 . The bowl device  2  comprises a downpipe  3 , departing from a branch aperture not further visible here, and a feed bowl  4  located beneath the downpipe  3 , with bowl cupolas  6  formed from grid bars  5  running in spoke fashion. In this situation, the downpipe  3  consists of an inner cylinder  7 , departing from the branch aperture not visible here, and an outer cylinder  8 , surrounding the inner cylinder  7 , on which the bowl  4  is suspended by means of the grid bars  5  of its bowl cupola  6 , in such a way that, when the feed delivery pipe  1  is lowered, it comes to rest, and in particular comes to rest on the floor  34  of the coop, not represented any further here. The outer cylinder  8  is guided in rotatable fashion at the inner cylinder  7  and in a raisable and lowerable manner, whereby at least one lifting stop is provided to delimit the lifting and lowering path, which will be described in greater detail hereinafter.  
         [0049]      FIG. 2  shows a view of the outer cylinder  8 .  
         [0050]     In  FIG. 3 , a side view of the outer cylinder  8  according to  FIG. 2  is shown, in a half-section.  
         [0051]      FIGS. 2 and 3  are explained in greater detail hereinafter.  
         [0052]     The outer cylinder  8  consists of adjacent cylinder sections  8 ′ and  8 ″, co-axial to each other. The cylinder sections  8 ′ and  8 ″ are connected to each other by means of bridging elements  9 , each of which is designed as a paddle or vane  10 , projecting over the periphery of the outer cylinder  8  into the feed bowl  4 . The bridging elements  9  bridge the gap area  11 , which corresponds to the distance between the cylinder sections  8 ′ and  8 ″ of the outer cylinder  8 , or in this case its upper cylinder section  8 ′, features a recess  13 , which is part of a lifting stop  14 . The outer surface of the upper cylinder section  8 ′ of the outer cylinder  8  is designed in the upper end part as a threaded spindle  15 , which has screw threads  16 .  
         [0053]     The outer cylinder is made of suitable plastic material, with the result that the screw threads  16  and therefore the threaded spindle  15  can be shaped without problem during the manufacture of the outer cylinder  8 .  
         [0054]     As  FIG. 1  also shows, the free ends of the grid bars  5  of the bowl cupola  6  are connected to a screw ring  17 , which can be screwed onto the area designed as a threaded spindle  15  of the cylinder section  8 ′ of the outer cylinder  8 .  
         [0055]     At the rotation of the feed bowl  4 , relative to the outer cylinder  8 , the threaded spindle  15  causes a movement of the feed bowl  4  in respect of the height, towards the lower end of the cylinder section  8 ″ with the vanes  10  of the outer cylinder  8 .  
         [0056]      FIGS. 2 and 3  further show that a rotational stop delimiting the rotational path of outer cylinder  8  in relation to the inner cylinder  7  features a driver dog  19 , located in this case on the inner surface  18  of the outer cylinder  8 , into the rotation path of which he elevation  21  arranged on the outer surface  20  of the inner cylinder  7  projects during the rotation of the outer cylinder  8  about the inner cylinder  7 .  
         [0057]      FIG. 4  shows a view of the inner cylinder  7 , which consists of cylinder sections  7 ′ and  7 ″, whereby the open gap area between the cylinder sections  7 ′ and  7 ″ is again bridged by bridging elements  23  in flat web form. In  FIG. 4 , a part of the lifting stop  14  is visible, which at the inner cylinder  7  is designed as at least one abutment shoulder  24  for the recess  13  in the outer cylinder  8 , projecting radially from the inner cylinder  7 .  
         [0058]      FIG. 4  shows that each abutment shoulder  24  for the recess  13  is a part of a radial projection  25  of the inner cylinder  7 , similar to a collar flange in shape.  FIG. 4  also shows that the outer surface  20  of the inner cylinder  7 , in the upper area and therefore in the area of its head part, is offset by means of a reduced cylinder diameter in relation to the other part of the cylinder section  7 ′ of the inner cylinder  7 . The offsetting step is designated by  26 .  
         [0059]      FIG. 2  further shows that, to provide securing against rotation of the structural unit consisting of the screw ring  17  ( FIG. 1 ) with bowl cupola  6  and the feed bowl  4 , there is provided at each outer cylinder  8 , in its area designed as a threaded spindle  15 , two spring-elastic engagement cams  27 . Each engagement cam  27  is connected by means of a spring-elastic tongue  28  to the outer cylinder  8 . In this situation, removal from the mold is effected in such a way that the tongues are wall parts of the outer cylinder, formed by insertion cuts, which are capable of springing from the outside inwards under radial pressure and can be moved back elastically into the initial position when the pressure is released. In the pressureless initial position, the tongues  28  are flush again with the wall of the outer cylinder  8 .  
         [0060]      FIG. 5  shows a side view of the inner cylinder, whereby the right half of the inner cylinder is shown in a longitudinal section.  
         [0061]     The same components are designated with the same reference numbers.  
         [0062]      FIG. 4  in particular shows that the inner cylinder  7  in its upper free end is involved in the formation of a pipe adapter, in that a bowl half  29  of the pipe adapter is formed on the inner cylinder  7 . This bowl half can be supplemented to form the pipe adapter by the imposition of an upper part  30 , which is visible in  FIG. 1 , which encompasses the feed pipe  1  in the area of a branch aperture, not further shown, in such a way that the branch aperture is flush with the fall aperture  31  in the upper bowl part  29  of the inner cylinder  7 . Feed emerging from the feed delivery pipe passes over the branch aperture and the fall aperture  31  into the inner cylinder, and can fall into the feed bowl via the gap area  22  or into the lower fall aperture  32 . The lower fall aperture  32  is circumscribed by the lower edges  33  of the cylinder section  7 ″.  
         [0063]      FIG. 6  shows, in a side view, a bowl device  2  suspended on a feed delivery pipe  1 , whereby the right-hand side is shown in section. The same components are designated with the same reference numbers.  
         [0064]     It can be seen from  FIG. 6  that the inner cylinder  7  is designed in such a way that its end-side cylinder section  7 ″ covers the gap area  11  between the cylinder sections  8  and  8 ″ of the outer cylinder  8 , when the outer cylinder  8  is moved by a raising of the feed delivery pipe  1  into a position which is lowered in relation to the inner cylinder  7 , in which the parts forming the lifting stop  14  are in opposing positions. With this embodiment, it can be seen in  FIG. 6  that the outer cylinder  8 , with the step surface formed by its recess  13  in the cylinder section  8 ′, is in contact on the abutment shoulder  24  of the radial projection  25  of the inner cylinder  7 . Feed material entering the inner cylinder  7  from the feed delivery pipe is represented here by dots, and trickles into the feed bowl  4 , whereby it trickles out of the lower fall aperture  32  of the inner cylinder  7  into the cylinder section  8 ″ of the outer cylinder  8 , and from there directly into the feed bowl  4 . This feed covers the conically-shaped floor of the feed bowl  4 , likewise made of plastic, in a flat dispersal, as can be seen here. Poultry running about on the floor  34  of the coop can reach the feed located in the depth of the feed bowl  4 .  
         [0065]     The height of the dispersal cone of feed above the floor of the feed bowl  4  is adjustable. To regulate the feed level, or to adjust what is referred to as the feed stand position, the screw ring  17 , to which the grid bars  5  of the bowl cupola  6  are connected, is rotated about a height axis. Depending on the rotation path and pitch of the screw threads  16 , the position of the bowl is displaced in relation to the lower emergence edge  35  of the lower free end of the outer cylinder section  8 ″.  
         [0066]      FIG. 7  is a sectional view along the line VII-VII in  FIG. 6 . The same components are designated by the same reference numbers.  FIG. 7  shows that the inner cylinder  7 , of which the cylinder section  7 ′ is visible here, is encompassed by the outer cylinder  8 , or by its cylinder section  8 ′, visible here. The outer cylinder, in the position represented here, is therefore freely rotatable about the inner cylinder  7 . In  FIG. 7 , the driver dogs  19  can be seen which are arranged on the inner surface of the outer cylinder  8 .  
         [0067]     The screw ring  17  features on its inner circumferential surface  36  cut-outs  37 . Engagement cams  27 , which are mounted on the spring-elastic tongues  28 , can engage with the cut-outs  37 , so that the screw ring  17 , with the engagement cams  27  engaged in the cut-outs  37 , cannot be rotated in relation to the outer cylinder  8 . The feed level, once set, can be maintained. In the event of rotational forces being imposed on the feed bowl or via its bowl cupola on the screw ring  17 , the unit consisting of the outer cylinder  8 , screw ring  17 , bowl cupola  6  and feed bowl  4  will rotate only in relation to the inner cylinder  7 . The inner cylinder  7  cannot rotate together because of its suspension on the feed delivery pipe  1 .  
         [0068]      FIG. 8  shows a side view according to  FIG. 6 , whereby the right half is in turn shown in section. The feed delivery pipe is lowered in the position shown in  FIG. 8 , so that it runs at a slight distance above the floor  34  of the coop. The feed bowl  4 , in the position shown in  FIG. 8 , rests on the floor  34  of the coop, as a result of which the unit formed by the outer cylinder with the bowl cupola  6  and the feed bowl  4  is raised in relation to the inner cylinder  7 . In this position, the recess  13  forming the lifting stop  14  and the abutment shoulder  24  of the inner cylinder  7  are no longer in mutually opposed positions. The outer cylinder  8  with its cylinder sections  8 ′ and  8 ″ are therefore raised in relation to the inner cylinder to such an extent that the gap area  11  between the cylinder sections  8 ′ and  8 ″ of the outer cylinder  8  is congruent with the gap area  22  between the cylinder sections  7 ′ and  7 ″ of the inner cylinder  7 . As a result of the congruent open gap areas  11  and  22 , which form a “360° window”, the feed can additionally pass to the lower fall aperture  32  into the feed bowl  4 , as is represented here by dots. The feed level in the feed bowl  4  is simultaneously higher, with the result that even young animals, such as chicks, can reach over the edge of the feed bowl  4  to the feed, which now stands higher in the feed bowl  4 .  
         [0069]      FIG. 8  also indicates that the upper area of the cylinder section  8 ′ of the outer cylinder  8 , which is provided with screw threads  16 , onto which the threaded ring  17  is screwed, are now raised to such an extent that the driver dogs  19 , not visible here, can be brought into effective connection by means of an elevation  21  or  21 ′ of the inner cylinder  7 .  
         [0070]      FIG. 9  again shows that the elevations  21  and  21 ′ on the outer surface  20  of the cylinder section  7 ′ of the inner cylinder  7  can come in contact with the driver dogs  19 , which project from the inner surface  18  of the cylinder section  8 ′ of the outer cylinder  8 . The driver dogs  19  of the fixed inner cylinder  7  prevent the further rotation of the outer cylinder  8  beyond the position of the elevation  21  and  21 ′. The outer cylinder  8  can therefore only be rotated through 180° in each case, and further rotation is accordingly stopped by the elevation  21  or  21 ′ respectively. If the outer cylinder is nevertheless rotated further, for example in order to change the level of the feed with the aid of the threads on the outer cylinder and with the aid of the screw ring  17 , then the engagement cams  27 , because of their oblique flanks  38 , will be pressed out of the cut-outs  37  in the screw ring, said cut-outs also being provided with oblique edges  39 . The engagement cams  27  are in this situation deflected inwards, and specifically against the elastic resetting force of the tongues  28 . With the corresponding further rotation into the next feed position, which is indicated here by numbers on the screw ring, the engagement cams  27  can engage again in the next cut-out  37 , as shown in  FIG. 7 .  
         [0071]      FIG. 10  shows the view of a bowl device, of which the bowl cupola has been left out for simplification of the internal arrangements of the feed bowl  4 . The same components are designated with the same reference numbers.  
         [0072]      FIG. 10  shows in particular that the feed bowl  4  features a feed plate, which in the area of its plate edge  40  features connecting elements  41  and  42  for connection to the bowl cupola  6 , not visible here. The connecting elements  41  and  42  comprise a folding joint  43  and at least one locking or retention element  44 . A ring surface of the feed plate, which runs around the plate center located beneath the downpipe  3 , is subdivided into feeding sections, whereby each feeding section consists of at least one pocket, one field, or similar shaped area  45 , delimited by depression or elevation. The number of feeding sections is equal to a multiple of the number of the bridging elements  9  of the outer cylinder  8 , formed as paddles or vanes  10 , of which the cylinder sections  8 ′ and  8 ″ are visible here, with the gap area  11  located between them.  
         [0073]     The above description is considered that of the preferred embodiment only. Modification of the invention will occur to those skilled in the art and to those who make or use the invention. Therefore, it is understood that the embodiment shown in the drawings and described above is merely for illustrative purposes and not intended to limit the scope of the invention, which is defined by the following claims as interpreted according to the principles of patent law, including the doctrine of equivalents.