Automatic livestock feeder

0001This application claims benefit of prior application No. 60/766667 which was filed on Feb. 3, 2006. Jan. 17, 2007

0002The present invention relates to an automatic livestock feeder. The invention can be categorized as a unique approach to the problem of feeding loose or baled hay to livestock in a quantity controlled and waste efficient manner and is a self-contained, timer controlled and automated, fully enclosed hay feeding device.

BACKGROUND OF THE INVENTION

0003Ever since the introduction of widespread hay bale production the re-occurring problem with hay feeding, especially in small hobby or commercial operations, has been the inability to control how much feed is being consumed and how much is being wasted. Generally, most livestock will consume more feed than they require. Unconsumed and loose feed being trod on by livestock or spoilt by the elements wastes an additional and significant portion. In view of these problems various approaches to a solution have been taken. These devices generally fall into two categories:

00041. Processed feed disbursement (e.g. feed pellets and grain)

00052. Loose hay and baled hay feeders

0006The latter of which is usually a basic containment area with no floor to reduce wastage and no roof structure to preserve the feed. In addition, they generally have no or limited automation of the feeding time duration or frequency in order to control the amount of feed consumed, and do not incorporate any form of automated “default to feed mode” in case of system failure, (e.g. Sturgis U.S. Pat. No. 6,550,421). In general, these feeders are labor intensive in that they have to be opened up or flipped over in order to load feed into them and in so doing often get bent or damaged. Also, livestock, especially cattle will sometimes damage or dislodge “empty” feeders. In addition, many of these types of hay feeders incorporate some type of “neck bars” to prevent the animals from climbing into the feeder. This type of barrier tends to allow horses to rub the hair from their manes and some designs using these types of barriers have been known to be a source of injury to young horses.

0007Below are references to other previous inventions designed to dispense loose or baled hay feed to livestock. <ul id="ul0001" list-style="none"><li id="ul0001-0001" num="0000"><ul id="ul0002" list-style="none"><li id="ul0002-0001" num="0008">CA 2399831 Dalman</li><li id="ul0002-0002" num="0009">CA 2115983 Dyson</li><li id="ul0002-0003" num="0010">CA 2236017 Bondarenko</li><li id="ul0002-0004" num="0011">CA 2113150 Rumbaugh</li><li id="ul0002-0005" num="0012">CA 1246403 Rapp</li><li id="ul0002-0006" num="0013">CA 1061663 Schoessow</li><li id="ul0002-0007" num="0014">U.S. Pat. No. 6,550,421 Sturgis</li></ul></li></ul>

0015These types of feeders have generally worked well in previous years when feed related costs were relatively low, but with today's higher costs to the animal owners in time and money, there exists a continuing need for improvement.

SUMMARY OF THE INVENTION

0016This new invention addresses the major obstacles faced by previous loose hay and baled hay feeders by incorporating the following unique features: <ul id="ul0003" list-style="none"><li id="ul0003-0001" num="0000"><ul id="ul0004" list-style="none"><li id="ul0004-0001" num="0017">1. A square enclosure complete with a base, floor, a solid rear wall, a roof structure and three gate assemblies, into which hay, loose or baled, is contained, thus substantially reducing wastage during feeding. In addition, the gate assemblies are easily opened and closed, thus reducing time and labor that is required for loading feed into the unit.</li><li id="ul0004-0002" num="0018">2. Feeding is controlled by raising or lowering moveable feed gates, which is done by incorporating the use of compressed air, resulting in safe, gentle and dependable operation.</li><li id="ul0004-0003" num="0019">3. Feeding times are controlled by a 24-hour programmable timer system, thus controlling the amount of feed consumed during a preset feeding time-period.</li><li id="ul0004-0004" num="0020">4. A roof structure to protect the feed from the elements</li><li id="ul0004-0005" num="0021">5. A fully automated system that “defaults to feed mode” in the case of a feed gate control system malfunction, ensuring that the animals will feed and not be shut out.</li><li id="ul0004-0006" num="0022">6. The need for “neck bars” for use with horses is virtually eliminated, due to the inherent design of the invention. The use of these and other similar restraining devices is a major disadvantage of other previous designs, in that these devices rub out the horse's mane and is a constant problem. This feature is especially relevant in respect to “show horses”. In addition, the overall design of this feeder unit reduces the possibility of injury to young or rambunctious animals.</li><li id="ul0004-0007" num="0023">7. The problem of animals causing damage to or dislodging the unit is reduced, due to the inherent weight and structural integrity of the feeder unit.</li></ul></li></ul>

0024In addition to the previously stated unique features of this invention, further descriptions of additional advantages of the embodiment are as follows: <ul id="ul0005" list-style="none"><li id="ul0005-0001" num="0000"><ul id="ul0006" list-style="none"><li id="ul0006-0001" num="0025">1. The distance from the ground to the top of the feed gates in the feed position (gates down) can be varied, depending on the height of the animal, yet, still prevents the animal from entering the feeder by design. Furthermore, even if an animal did get inside the feeder, there are no sharp objects or obstacles with which to injure themselves. For feeding cattle only, neck bars can be added as an option—(not shown).</li><li id="ul0006-0002" num="0026">2. The unit is fully equipped to operate by either 110 VAC or 12 VDC. The 12 VDC system incorporates a battery and solar panels so as not to rely on 110 VAC if it is not accessible. Thus, the invention can be utilized as a fully self-contained feeding unit in remote settings. This invention utilizes 12 VDC to power the compressed air system, which through the use of uniquely designed air dryers, is free from wintertime moisture freezing problems.</li><li id="ul0006-0003" num="0027">3. The unit is fully covered by a roof structure to maintain dry feed and prevent spoilage by weather. In addition, the outer sheathing of steel mesh ensures that air can flow through the unit, facilitating the drying of damp feed.</li><li id="ul0006-0004" num="0028">4. The unit is mounted on skids, so as to be fully moveable in the pasture area. Additionally, there are lifting eyes and tow hooks to enable loading of the feed unit onto a vehicle for transport. Optional drift spikes are incorporated, that can be driven into the ground to ensure that the unit cannot be easily dislodged.</li><li id="ul0006-0005" num="0029">5. The load-sensing feature of the feed gates, inherent in the design of the invention, ensures that no harm comes to the animals, or people, during feed gate operation. This means that the up movement of the feed gates at the end of the preset feeding time is quite slow and can be stopped with light down pressure, (10-15 psi), (e.g. an animal leaning over the gate to feed), but when the animal raises its head slightly the feed gate will continue upward. The net result is that the animal is slowly yet firmly forced to back away from the feeder, thus ending the feeding period.</li><li id="ul0006-0006" num="0030">6. The three gate assemblies are hinged on one side to allow the complete gate assembly to be swung open without undoing any of the components, thus allowing for easy loading (e.g. a 6′ round bale using a tractor, or hand loading approximately 12 to 16 square bales) and cleaning. The opening and closing of the gates can be done with the feed gates up or down.</li><li id="ul0006-0007" num="0031">7. The time and labor saving features of this feeder unit are major advantages. This invention eliminates daily manual feeding and allows the animal caretakers to be away from the premises for extended periods of time. Plus, the invention reduces the amount of time and money spent in the moving of feed to the feeding area as well as the time and expense required cleaning up and disposing of compacted waste feed. Feeding efficiency is increased and wastage reduced, as well as allowing a more accurate monitoring of feed costs per animal.</li></ul></li></ul>

INDEX OF DRAWINGS

00321. FIG. <b>1</b>—an overall view of the invention showing one of the moveable outer feed gates down in the feeding position

00332. FIG. <b>2</b>—the interior of the control box and the placement of the electrical and air system components

00343. FIG. <b>3</b>—the exterior of the control box as well as the access door and ventilators

00354. FIG. <b>4</b>—rear view of the unit showing the skids, control box, roof structure, drift spikes, solar panels and mast, feed light and rear wall

00365. FIG. <b>5</b>—shows a detail view of one of the gate assemblies and air-lifting ram

00376. FIG. <b>6</b>—a detail view of the feed gate rollers and roller guide

00387. FIG. <b>7</b>—another detail view of one of the gate assemblies, showing the air-lifting mechanism

00398. FIG. <b>8</b>—an end view of the fixed inner gate and moveable outer feed gate

00409. FIG. <b>9</b>—wiring schematic, also showing the dual voltage capability

004110. FIG. <b>10</b>—air system schematic

DETAILED DESCRIPTION OF THE INVENTION

0042In the overall view, <figref idref="DRAWINGS">FIG. 1</figref>, of the embodiment of the invention, it is shown that the automatic livestock feeder consists of two base runners <b>1</b>, to each of which is fastened a steel wear strap <b>2</b> to protect the runner when towing the unit across rough ground. Steel tow hooks/lifting eyes <b>4</b> are fastened to each end of the runners. The base runners are constructed using 6″×8″ pressure treated wood timbers, or fabricated to the aforementioned dimensions using steel. Directly fastened to the top of each runner is a series of pressure treated 2″×8″ boards <b>3</b> laid at right angles to said runners to form a floor. Each floor board is fastened to each of the two runners with the appropriate use of wood screws and construction adhesive. The thus formed square base measures (approx.) 7′ on each side. The above embodiment will henceforth be referred to as the base of the invention. Thus, feature 1 of the Summary is fully realized.

0043Directly fastened to the base of the invention is the solid rear wall <b>22</b>. At each corner of the base is a post <b>5</b>, each of which is constructed of 2″ or 3″ steel pipe or square tubing and welded to a flat steel base plate, which is bolted to the base. The said post is gusseted to the base plate for rigidity. The four corner posts support the gate assemblies <b>6</b> and <b>7</b> using the hinge assemblies and latches <b>10</b>. The posts also support the rear wall <b>22</b> and the roof structure <b>21</b> as well as the solar panel mast <b>19</b>. The roof structure is peaked with a (approx.) 10″ eve and gable overhang and is constructed using steel and wood with tin roofing.

0044The invention incorporates three gate assemblies, as shown in <figref idref="DRAWINGS">FIG. 5</figref>. Each assembly consists of an outer feed gate <b>6</b> and a fixed inner gate <b>7</b>. The inner gate <b>7</b> is rectangular in shape, (approx.) 77″ long and 32″ in height and is constructed using (approx.) 1½″ pipe for the top of the gate and (approx.) 1¼″×⅛″ wall square tube for the side and bottom frame members. Equally spaced across the width of the gate are four vertical frame members of ¾″ square tube. All joints on the inner gates and the feed gates are welded. Attached to each side frame is a roller guide <b>11</b>, within which the feed gate rollers <b>12</b> move up and down in. Welded to the guides <b>11</b> are the hinge members <b>10</b> of which there are three on one end, and a gate latch <b>10</b> on the other end, of each gate. These hinge and latch members fasten to matching members <b>10</b> on each corner post <b>5</b>, as shown in <figref idref="DRAWINGS">FIG. 1</figref>, and allows the gate assemblies to be unlatched and swung open for loading and cleaning. Opening the front gate assembly <figref idref="DRAWINGS">FIG. 1</figref>, <b>8</b>, <b>9</b> is the preferred method of loading feed into the unit.

0045Each inner gate <b>7</b> incorporates an air operated lift-ram <b>14</b> to raise and lower the feed gate <b>6</b>. The air-lift ram is bolted to the bottom frame member of the inner gate and can extend upward through the top of the gate through the cutaway, as shown in <figref idref="DRAWINGS">FIG. 5</figref>. An air-line <b>17</b> connected to each ram is fastened to the bottom frame member and connects to the air control system at the rear of the feed unit. Each inner gate <b>7</b> is sheathed on the inner side with metal steel mesh or sheet metal <b>13</b>.

0046As shown in <figref idref="DRAWINGS">FIG. 5</figref>, each gate assembly utilizes an outer moveable feed gate <b>6</b>. This gate is rectangular in shape and is approximately 73″ in length and 38″ in height and is constructed of (approx.) 1½″ pipe on its top frame and 1″ square tube for the side and bottom frame members. Shop/garage door type roller units are attached to each door using holes drilled in the side frame members, as shown in <figref idref="DRAWINGS">FIG. 6</figref>.

0047There are two rollers on each end of the feed gate thus allowing the feed gate to slide up or down in the guides <b>11</b> of the inner door <b>7</b>, as shown in <figref idref="DRAWINGS">FIG. 6</figref>. Each feed gate is sheathed on the outside with steel mesh or sheet metal <b>13</b>.

0048<figref idref="DRAWINGS">FIG. 7</figref> shows that the feed door <b>6</b> is raised and lowered using an air operated lift-ram <b>14</b>. At the top of the air ram rod is mounted a cable pulley <b>16</b> that utilizes a cover to hold the 3/16″ aircraft cable <b>15</b> in place on the pulley. One end of the cable is attached to the inner gate <b>7</b> and the other end is attached to the bottom of the feed gate <b>6</b>. The operating stroke of the ram is approximately 19½″. Utilizing the pulley arrangement, as shown in <figref idref="DRAWINGS">FIG. 7</figref>, this stroke is now increased to an operating length of approximately 39″. Thus, when the ram rod is extended, the feed gate is lifted up to give a total gate height of (approx.) 70″ from the floor of the base <figref idref="DRAWINGS">FIG. 1</figref>, <b>1</b>, <b>2</b>, <b>3</b>.

0049<figref idref="DRAWINGS">FIG. 8</figref> shows that the aircraft cable <b>15</b> is anchored to the inner gate with an adjustable eyebolt in order to allow the height of the feed gate <b>6</b> to be adjusted in its lowered position, which also allows its raised height to be adjusted. Thus, feature 8 of the Summary is fully realized.

0050<figref idref="DRAWINGS">FIG. 4</figref> presents a view of the rear of the invention, showing the base of the invention 1, 2, 3, the ground anchors <b>23</b>, the control box <b>24</b>, corner posts <b>5</b>, and the feed gate roller guide <b>11</b>.

0051<figref idref="DRAWINGS">FIG. 4</figref> also shows the roof structure <b>21</b> that is constructed of appropriate sizes of steel square tube, 1″×3″ lathing and metal shed roofing and is fastened to each corner post <b>5</b>. This feature ensures that the feed remains dry. Thus, feature 10 of the Summary is fully realized.

0052The solar panel arrangement is also shown in <figref idref="DRAWINGS">FIG. 4</figref>. The solar panel mast <b>19</b> rests in a mounting socket <b>19</b> and can be rotated to maximize sunlight exposure to the panels <b>18</b>. The solar panels are of sufficient wattage output as to properly keep the 12 VDC battery <b>37</b> charged up. A feed light <b>20</b> is located on the top of the mast <b>19</b>, which illuminates when the feed gates are down for feeding.

0053<figref idref="DRAWINGS">FIG. 2</figref> shows a block layout of the location of the various electrical and air system components in the control box <b>24</b>.

0054<figref idref="DRAWINGS">FIG. 3</figref> shows the approximate shape of the control box <b>24</b>. It will be noted the use of ventilators <b>50</b> to help stabilize control box ambient temperatures and the door latches <b>49</b> that are of the internal latching type to prevent animals from opening the door <b>48</b>. The control box <b>24</b> is constructed of metal or re-enforced wood and securely anchored to the feed unit rear wall <b>22</b>.

0055<figref idref="DRAWINGS">FIGS. 9 and 10</figref> show schematics of the electrical and air systems. These systems operate in conjunction with each other to cause the feed gates, <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b>, to automatically open and close on a programmed time schedule.

0056<figref idref="DRAWINGS">FIG. 9</figref> shows the electrical schematic of the control system including the dual voltage capability, whereas 110 VAC <b>47</b> enters the junction box <b>27</b> through a protective conduit. A master switch <b>52</b> is utilized to control the 110 VAC external power. From the junction box <b>27</b>, 110 VAC is connected in parallel with the 110 VAC output of the power inverter <b>30</b>, and also to the programmable timer <b>26</b> which is capable of multiple on/off settings during a twenty-four hour period. The timer <b>26</b> 110 VAC output is then routed to a 110 VAC/12 VDC dual voltage relay <b>29</b> which activates to allow 12 VDC from the battery <b>37</b> to operate the compressor <b>25</b>, air system dump valve <b>42</b>, through relays <b>32</b>, <b>33</b>, and the feed light <b>20</b>.

0057When the unit is operating in the 12 VDC mode, the electrical power is supplied by the battery <b>37</b> only. This battery is kept charged by the solar panels <figref idref="DRAWINGS">FIG. 1</figref>, <b>18</b> via wiring circuit <b>46</b> and optional solar panel voltage controller <b>31</b>. A master switch <b>51</b> is utilized to control the battery <b>37</b> power to the system The 110 VAC required by the timer <b>26</b> is supplied by the 12 VDC to 110 VAC inverter <b>30</b>, and henceforth the operation is as described above. The 12 VDC sections of the control system are protected from overload by fuses and/or circuit breakers <b>34</b>, <b>35</b>. Thus, feature 9 of the Summary is fully realized.

0058The 12 VDC NC air system dump valve <b>42</b> is controlled by NO relay <b>33</b>. When the twenty-four hour timer <b>26</b> reaches one of it's preset program settings, 110 VAC is sent to the 110 VAC/12 VDC relay <b>29</b> and the resulting 12 VDC is supplied to NC relay <b>32</b> and NO relay <b>33</b> which activate to shut off the compressor <b>25</b>, and to open the NC dump valve <b>42</b> which causes the air pressure in the system to drop to <b>0</b> psi, thus allowing the feed gates <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b> to drop down to the feeding position. At the end of the programmed time for feeding, the timer <b>26</b> causes the 12 VDC input to the relays <b>32</b> and <b>33</b> to cease, thus allowing the relays to activate the compressor <b>25</b>, and to close off the dump valve <b>42</b>. The air system will now build up to operating pressure, causing the feed gates <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b> to move upward to the closed position, thus shutting off animal access to the feed. A manual dump valve switch <b>53</b> is incorporated between 12 VDC junction terminal <b>36</b> and compressor relay <b>32</b> and dump valve relay <b>33</b> in order to provide manual up and down control of the feed gates <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b>, regardless of timer <b>26</b> operation. When the air system reaches approximately 95 psi, the NC pressure switch <b>41</b> activates to shut off the compressor <b>25</b>, thus completing the feed cycle and thus, insuring that feature 3 of the Summary is fully realized.

0059<figref idref="DRAWINGS">FIG. 10</figref> shows the overall layout of the air system that is utilized to raise and lower the feed gates <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b>. A 12 VDC air compressor <b>25</b>, complete with an inlet filter/air dryer, supplies clean compressed air through a flex hose to an air dryer unit <b>39</b>, which removes all moisture to prevent cold weather freezing problems. A one-way check valve <b>40</b> is utilized to maintain system air pressure, while an optional bleed-off valve <b>38</b> is inserted between the check valve and the compressor <b>26</b> to slowly bleed off the air pressure to ease the compressor start up load. An adjustable NC pressure switch <b>41</b> senses air system pressure and shuts off the compressor at approximately 95 psi and turns it on at approximately 75 psi. The 12 VDC air dump valve <b>42</b> is activated by the timer <b>26</b> at preset feeding times to dump all the air from the system to allow the feed gates <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b> to come down by gravity. An air pressure gauge <b>44</b> shows system pressure at all times. An adjustable air pressure relief valve <b>43</b> ensures that system pressure does not exceed 105 psi. Air-lift rams <b>14</b> are utilized, one in each gate assembly <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b>, <b>7</b>, to operate the feed gates. Each ram is a single acting unit with the upper chamber vented to atmosphere through a small vented air dryer <b>39</b>, and the lower chamber connected by an airline to the control box <figref idref="DRAWINGS">FIG. 1</figref>, <b>24</b>. Inherent in the design of any air system, tiny leaks will occur allowing a pressure loss, thus causing the pressure switch <b>41</b> to periodically activate the compressor <b>25</b> in order to pressurize the system back up to the preset cut-off pressure of 95 psi. In the event of compressor or control system malfunction or failure, the aforementioned tiny leakage insures that the air system pressure will eventually fall to the point where the feed gates will not be held by air pressure in the closed position and will slowly drop down by gravity to the feeding position. Thus, feature 5 of the Summary is fully realized.

0060Described above is a description of each of the components in the feeder control system, whereas their actual function in relation to the typical operation of this automatic livestock feeder is as follows:

0061Unless otherwise stated, Drawing <figref idref="DRAWINGS">FIG. 9</figref> is to be referred to.

0062Starting with a time just prior to the beginning of a programmed feeding time, as will be initiated by the timer <b>26</b> eg. 6:00 am start; 8:00 am finish . . . the status of the automatic livestock feeder is now: FEED GATES CLOSED <ul id="ul0007" list-style="none"><li id="ul0007-0001" num="0000"><ul id="ul0008" list-style="none"><li id="ul0008-0001" num="0063">1. system air pressure is between 75 psi and 95 psi</li><li id="ul0008-0002" num="0064">2. air pressure switch <b>41</b> is open and compressor is off</li><li id="ul0008-0003" num="0065">3. dump valve <b>42</b> is closed</li><li id="ul0008-0004" num="0066">4. feed gates <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b> are fully up (closed)</li><li id="ul0008-0005" num="0067">5. timer <b>26</b> is running</li></ul></li></ul>

0068When the timer detects 6:00 am, it sends 110 VAC from it's output to the 110 VAC/12 VDC relay <b>29</b>, which in turn sends 12 VDC to NC relay <b>32</b>, which shuts off power to the compressor <b>25</b> via the NC pressure switch <b>41</b>. 12 VDC also goes to the NO relay <b>33</b> which causes the NC dump valve <b>42</b> to open, thus allowing all the air in the system to exhaust and pressure to drop to 0 psi. 12 VDC is also sent from NO relay <b>33</b> to the feed light <figref idref="DRAWINGS">FIG. 1</figref>, <b>20</b> on the roof. When the system air pressure falls below (approx.) 40 psi the feed gates <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b> slowly start to drop by gravity to their fully open or feeding position.

0069The status of the automatic livestock feeder is now: FEED GATES OPEN <ul id="ul0009" list-style="none"><li id="ul0009-0001" num="0000"><ul id="ul0010" list-style="none"><li id="ul0010-0001" num="0070">1. system air pressure is at 0 psi</li><li id="ul0010-0002" num="0071">2. air pressure switch <b>41</b> is closed and compressor is off</li><li id="ul0010-0003" num="0072">3. dump valve <b>42</b> is open and system air is exhausted</li><li id="ul0010-0004" num="0073">4. feed gates <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b> are fully down (open)</li><li id="ul0010-0005" num="0074">5. feed light <figref idref="DRAWINGS">FIG. 1</figref>, <b>20</b> is on</li><li id="ul0010-0006" num="0075">6. timer <b>26</b> is running</li></ul></li></ul>

0076At the end of the programmed feed time, the timer <b>26</b> will detect 8:00 am and cause the 110 VAC from it's output to 110 VAC/12 VDC relay <b>29</b> to cease, which allows NC relay <b>32</b> to close, thus sending 12 VDC to the pressure switch <b>41</b>, (which is now closed and will only open when air pressure reaches 95 psi) and through it to the compressor <b>25</b>. 12 VDC is also shut off to the NO relay <b>33</b> which allows the NC dump valve <b>42</b> to close off.

0077The status of the automatic livestock feeder is now: FEED GATES CLOSING <ul id="ul0011" list-style="none"><li id="ul0011-0001" num="0000"><ul id="ul0012" list-style="none"><li id="ul0012-0001" num="0078">1. compressor <b>25</b> is operating and dump valve <b>42</b> is closed</li><li id="ul0012-0002" num="0079">2. system air pressure is building up to 95 psi, at which time the pressure switch <b>41</b> will open and cause the compressor <b>25</b> to shut off</li><li id="ul0012-0003" num="0080">3. at (approx.) 40 psi the feed gates <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b> will slowly start to be lifted up by the air-lift rams <figref idref="DRAWINGS">FIG. 1</figref>, <b>14</b> to their closed position</li><li id="ul0012-0004" num="0081">4. feed light <figref idref="DRAWINGS">FIG. 1</figref>, <b>20</b> is off</li><li id="ul0012-0005" num="0082">5. timer <b>26</b> is running.</li></ul></li></ul>

0083The above-described feed cycle will repeat at every timer initiated feeding time.

0084Thus, it has been shown that this feeder unit is fully automatic in operation and programmable as to it's times of operation.

0085It will be further noted that: <ul id="ul0013" list-style="none"><li id="ul0013-0001" num="0000"><ul id="ul0014" list-style="none"><li id="ul0014-0001" num="0086">1. The feed gates <figref idref="DRAWINGS">FIG. 1</figref>, <b>6</b> can be adjusted as to the speed at which they come down for feeding or go up to close.</li><li id="ul0014-0002" num="0087">2. The feed gates can be caused to operate using the manual dump switch <b>53</b>, regardless of timer settings.</li><li id="ul0014-0003" num="0088">3. The air system pressure switch <b>41</b> (compressor cut in and cut out pressures) is adjustable.</li><li id="ul0014-0004" num="0089">4. The air system incorporates a safety relief valve <figref idref="DRAWINGS">FIG. 10</figref>, <b>43</b> which is set at (approx.) 10 psi above system operating pressure.</li><li id="ul0014-0005" num="0090">5. The control system can be operated on 110 VAC or 12 VDC (battery <b>37</b> to be charged by a battery charger <b>28</b>, or via solar panels <figref idref="DRAWINGS">FIG. 1</figref>, <b>18</b>).</li><li id="ul0014-0006" num="0091">6. The timer <b>26</b> is capable of multiple programmable on-off times in a 24-hour period.</li><li id="ul0014-0007" num="0092">7. Cold weather freeze up of the air system is prevented by the desiccant filled air dryers <figref idref="DRAWINGS">FIG. 10</figref>, <b>39</b>.</li></ul></li></ul>

0093Although this invention has been described in connection with a preferred embodiment, it should be understood that various modifications, additions and alterations may be made to the invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.