This invention relates to a pet-activated feeder for domestic animals to dispense dry particulate food.
The pet feeder systems to date can be broken down into three major categories: Automatic programmable (Electric) systems, solely mechanical systems, and gravity fed systems.
Automatic programmable feeders rely on electricity to operate and may fail in case of a power failure. Some have battery backup systems but the complexity of these systems make them expensive to acquire. The many parts of electric systems make them hard to clean many complex surfaces are hidden from the user and can harbour bacteria over time. Complete dissasembly of such systems is not reconmended as it will void to warranty of the product.
Solely mechanical systems have been used in an outdoor environment to keep other animals from scavenging the intended pet's food. These systems use a hinged platform to expose the food using the pet's weight. Other mechanical systems used wind up clocks and release mechanisms to release a spring loaded lid.
Gravity fed systems are of the simplest design and maintain a full level of food until the reservoir is empty.
The main detractor of these prior systems is that they do not address the bad habits of the pets themselves. It is very common for pets to eat too fast which hinders proper digestion. No matter what the system a full meal portion is available to the pet which fails to regulate their eating habits. Other simpler systems use a simple ball in the pet's bowl to hinder the pet and slow its down but most pets easily defeat this system by removing the foreign object from the bowl and continuing with their meal. Lack of stimulation in a pet is one of the biggest drivers for bad behaviour; all systems described above will unconditionally provide the pet with food, and accordingly do not stimulate the animal. The pet then learns that food will always be there without having to do anything for it.
According to a first aspect of the invention there is provided an animal activated feeder system comprising:
a feed reservoir defined by an interior of a container having a feed opening communicating an exterior of the container with the feed reservoir at one end of the container;
a frame arranged to support the container in an upright position with the feed reservoir positioned over the feed opening;
a dispensing member pivotal about a longitudinal axis thereof and arranged to extend through the feed opening in a position disposed partially within the feed reservoir with a bottom end of the dispensing member disposed outside the container below the feed opening, the dispensing member defining a passage lying on a helical path about the longitudinal axis to extend at least partially along a length of the dispensing member over at least a partial portion of said length that passes through the feed opening; and
a lever projecting outward from the dispensing member between the bottom end thereof and the partial portion of the length thereof that passes through the feed opening to position a distal end of the lever at a distance radially outward from the longitudinal axis of the dispensing member.
Preferably the dispensing member comprises a shaft and the passage comprises a recess in an outer periphery of the shaft.
Preferably the recess in the outer periphery of the shaft is defined by a helical groove formed therein on the helical path about the longitudinal axis.
Preferably the container has a fill opening in an end thereof opposite the feed opening.
Preferably there is provided an openable and closeable cover operable to selectively cover and at least partially uncover the fill opening.
Preferably the frame is an upright stand arranged to sit atop a floor or ground surface and support the container at a height thereabove.
Preferably the frame comprises a base and an upright structure projecting upward from the base to support the container thereabove, the base presenting two feet projecting to one side of the upright structure on opposite sides of the feed opening to accommodate a bowl between the feet to receive feed from the feed opening in operation of the feeder.
Preferably the feet of the base are separated by an arcuate cutaway extending into the base from a side thereof opposite the upright structure.
Preferably there is provided a feed guide supported on the frame at a position below the dispensing member and the feed opening of the container to direct feed therefrom to a location not directly beneath the feed opening.
Preferably the feed guide is adjustable to change the location to which the feed is directed.
Preferably the feed guide comprises a ramp pivotally mounted on the frame to allow pivoting of a free end of the ramp upward and downward toward and away from the feed opening above.
Preferably the container is removable from the frame.
Preferably the dispensing member is removable from the container.
Preferably the dispensing member is pivotally suspended from a connection at a top end thereof proximate a top end of the container.
Preferably the dispensing member is pivotally suspended from a connection at a top end thereof with the cover proximate a top end of the container.
Preferably connection at the top end of the dispensing member is a quick release connection.
Preferably the dispensing member is slidable through the feed opening into the connection with the cover.
Preferably the container comprises a tapered portion narrowing toward the feed opening.
Preferably the container comprises a neck of lesser diameter than a remainder of the container and at which the feed opening is defined, the frame comprising a laterally projecting support having a hole therein for receiving the neck to support the end of the container at which the feed opening is defined.
Preferably the frame comprises a lower support engaging the container at a distance below the cover, the cover being pivotal into and out of a closed position over the fill opening of the container to close and open the fill opening and to support the end of the container opposite the feed opening when closed.
Preferably a side of the cover facing downward when closed is grooved to receive the end of the container opposite the feed opening in this grooved side to secure the container in place between the lower support and the cover.
Preferably the end of the container opposite the feed opening is recessed toward the end at which the feed opening is defined at one or more positions about a circumference of the container, and one or more breaks along a circular path on which the cover is otherwise grooved each cooperate with a respective recess in the end of the container to block rotation of the container.
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
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The invention as described above for aesthetic reasons uses common woodworking joints and wood glue to fasten parts together, and the strength of this design has proven more then adequate for small domestic animals like cats and small dogs. For larger animals the joint design can be altered to incorporate stronger joints with screws and/or metal brackets. The specific prototype design described above uses pine board as its main material because it is easy to work with and allowed quick alteration until the design was perfected. Other materials such as plastics or sheet metal can alternatively be employed, and may be more suitable for larger scale production.
Two litre recycled containers were chosen as the feed reservoir for the invention as they are plentiful in supply, made of a clear plastic which makes it easy to check the level of food within the reservoir for the user, and have a smoothly tapered shape funneling or narrowing toward the container opening through which feed is dispensed, thereby minimizing tendency for undispensed food to remain at the bottom of the container. However, it will be appreciated that containers of other sizes, shapes and materials may alternatively be employed. The depth of cut within the helical screw assembly will need to vary for different types of dry foods. An assorted arrangement of screw shafts is needed to function with different size foods. Once the shallowest screw required for a size of food is identified, deeper screws may be used to increases the flow of food.
This prototype on which the illustrated embodiment is based was built around the feed reservoir. This creates two restrictions. The first is that the size of the food cannot exceed the size of the outlet hole. This is easily addressed by scaling the feed reservoir to incorporate a larger outlet hole. The second restriction is that the size of the dispensing screw is limited by the size of the outlet hole. In this design the material used for the dispensing screw is hardwood. When coring out the wood screws there is a critical point at which the strength of the screw is compromised. The maximum recommended depth of cut is equal to the radius of the wooden rod itself. This restriction occurs only because of the strength limitations of wood. Changing the material to plastics or metal would remedy this issue. For example, a plastic or metal dispensing screw could resemble or be in the form of a corkscrew-like structure as opposed to a helically grooved shaft, with spacing between turns of the corkscrew being sufficient to accommodate a food particle and the diameter of the empty cylindrical space about which the corkscrew helically coils being too small to accommodate a fool particle to prevent feed from free falling from the reservoir through the centre of the corkscrew. Like the illustrated helically-grooved shaft, a corkscrew coaxially aligned with the feed opening of the reservoir container would provide a feed passage extending downwardly through the feed opening along the axis on a helical path thereabout, this passage being defined between sequential turns of the corkscrew rather than remaining intact full-diameter portions of a grooved shaft.
It is conceived that the feed passage, although lying on a helical path, need not itself be fully helical. That is, a shaft could have a peripheral groove cut or formed therein that extends along a helical path about the shaft's axis but does not complete a full passage around the circumference thereof (i.e. doesn't complete a full 360° turn around the axis). Accordingly, such a non-vertical sloped peripheral groove having the same pitch angle as the illustrated helical groove would not extend over as long a portion of the shaft's total length, and instead may be just long enough to pass fully through the feed opening from a position sufficiently far up the neck of the container to receive feed therefrom.
Hinges where manufactured out of wood for aesthetic reasons but could easily be change to brass, other metal or plastic hinges. It will also be appreciated that the frame design may be modified, for example to replace the upright, self-supporting stand configuration with a bracket or frame configured to fasten to a wall or other support structure to carry the feed reservoir container at an elevation above the ground, floor or other surface where food is to be dispensed. However, the illustrated embodiment is preferred, as the stand-alone frame or housing can be used at any location, a top filling end of the container can be accessed without having to remove the container from the frame, the container can be removed from the frame for cleaning, and the dispensing shaft can be removed from the container for cleaning or for replacement or substitution by a shaft of different recessed depth at the helical groove in order to change a delivery rate of a given food particle size or adapt the system to another food of different particle size. Even in embodiments retaining the feature of a removable dispensing shaft, it will be appreciated that other swiveling or pivoting fastening arrangements may be used in place of the valet keychain type mechanism to pivotally support the shaft.
If already in place, rotate the lid 5 counter clockwise to release the lid from the locked condition and lift the lid from its closed position cooperating with the cover to complete the closure of the top filling end of the container. Fill the feed reservoir 13 with as much dry particulate food as required. Replace the lid 5 to its closed position nested partly within the cover and rotate clockwise to lock. Place the feed bowl retainer 11 at the end of the ramp 10 on the edge of the feed bowl 21.
Back and forth motion of the horizontal lever 8 will dispense feed into the feed bowl.
From an assembled state, the following steps are taken to disassemble the feeder. First the lid 5 is rotated counter clockwise and lifted. This action exposes the dispensing screw shaft 6 retaining mechanism 7a. By pressing down plunger-equipped component or actuator portion 7a of the keychain mechanism and pulling simultaneously downward on the dispensing screw 6 from the bottom, the dispensing screw can be removed by the resulting sliding the hollow sleeve half 7b of the fastening mechanism from off the free end of the actuator half 7a. The two retaining pins 12 can each be removed with an upward pulling motion. The top cover 4 can then be rotated upward to release the feed reservoir 13. The reverse process is performed to reassemble.
Domestic animals are very food driven which makes the teaching process simple. For canine pets, place peanut butter or other similar substance on the lever 8, ensure that the animal witness the food being poured into the feed reservoir 13. The natural reaction of the animal will be to lick the lever 8 and cause the machine to operate. The process is repeated until the animal learns that moving the lever is rewarded with food. For feline pets similar technique as for canines may be used or attaching one of the cat's favourite toys to the lever 8 will have the cat associate operating the lever with food rewards.
Fill and set for the animal to dispense as needed.
Place a single meal portion for each meal to simply slow down the pet's rate of consumption.
Use over a period of time where the owner is away. Knowing how much the pet eats on a regular basis and calculating how long it will last. Time to operate unattended is to be determined on a case by case basis.
Since various modifications can be made in my invention as herein above described, and many apparently widely different embodiments of same made 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.
This application claims benefit under 35 U.S.C. 119(e) of U.S. Provisional Patent Application Ser. No. 61/266,743, filed Dec. 4, 2009.
Number | Date | Country | |
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61266743 | Dec 2009 | US |