Cylindrical System for animal excrement removal with removable litter Tray

Invention field

This invention is a litter box that does not require manual excavation for excrement cleaning, which reduces human exposure to feces and bad odors .

Concomitantly it reduces the accumulation of litter in the surroundings, either from the litter that may attach itself to the animal's paws when exiting the removable litter tray (3) by the animal passing through the grid of the base holder (7) or from the litter the animal may spill when excavating.

It possesses a removable litter tray (3) that may be removed from the system, with or without litter, allowing its sanitation and thus increasing its hygiene.

Background on the invention

In recent years, all over the world, cats have become the most popular indoor pets.

Unlike the dog, which needs to go outside several times a day to do its needs, the cat can stay indoors permanently, utilizing the litter box as a toilet. For this reason, litter boxes have become a common feature in many homes, in many countries.

Throughout the years several litter boxes have been invented, from the simplest to the so called "advanced". The simplest ones require manual excrement removal, by digging in the litter to look for these. The simple, but advanced, do not require manual excavation of the excrements, however they are not automated. In the so called "advanced", the process is automated and requires little from the human.

These inventions, however, do not solve the several problems pet owners face, like regular sanitation of the litter tray, the litter spread around the litter box area and the manual excavation for excrements, they are limited to solving one or two problems per invention.

For instance patent US4120264A, is limited to removing the excrements without direct manual process, however it does not solve the problem of the litter that falls from the animal' s paws to the surrounding environment after it uses the litter box .

The patents US5662066, US20140245960 and US6463881, also do not solve the problem of the litter that gets stuck in the animal's paws and spreads to the surrounding environment. They are basically limited to solving the problem of direct manual removal of the excrements, in an automatic and automated way.

Other solutions have been developed, for instance patent WO2013160899, which solves two problems, easy removal of the excrements, without direct intervention and the litter that attaches to the animal's paws. It is not, however, practical when it comes to the regular sanitation necessary to a litter box, due to the residues of animal urine that tend to lodge in the bottom of the tray of the litter box. In order to sanitize the box it is necessary to remove the litter from the system to another location and to move the entire system to the washing place .

Throughout the new inventions, the sanitation of the litter box tray has been one of the forgotten factors, concerning hygiene matters, which is, possibly, one of the biggest problems a pet owner has to deal with. Concerning the animal's urine, it tends to lodge in the bottom of the litter tray. No matter how much litter you add to the tray, the animal tends to excavate leaving the excrements always near the bottom of the litter tray. It is practically inevitable that this happens and when it happens constantly, the granular matter ("cat litter") tends to get stuck to the bottom of the tray.

In systems where the removal of the animal' s excrements is done manually and directly, pet owners usually move the litter to one side of the tray and scrape the paste, resultant of the contact of the urine with the granular matter and the bottom of the tray, with a scoop, throw it away and re-cover with litter without washing first.

In other systems, as the ones mentioned earlier, especially the automated ones, where interior access is limited, the paste is not even scraped, clean litter is placed on top, which, in matters of hygiene, is far from desired.

Having into account these considerations, it is highly relevant the creation of a litter box where manual excavation for excrement removal is not necessary, that avoids or diminishes the litter attached to the animal's paws , which culminates in a better cleanliness of the surrounding environment and possesses a removable litter tray, with or without litter, in order to facilitate regular sanitation, without litter to make washing the removable litter tray easier, and with litter to make the rest of the system easier to wash without the need to move it to another location. Figure Description

1. Basic Structure

95 2. Rotating Cylinder

2. .1. Chamber

2. .2. Chamber Filt

2. .3. Rotating cyl

2. .4. Opening for

100 2. .5. Opening for

3. Removable litter tray

4. Excrement collection drawer

5. Latch

105 6. Support Base

7. Support Base Grid

8. Excrements

9. Granular matter

A. Operating position

110 B. Discharge Position

C. Granular matter leveling position

FIG. 1 - Cylindrical system for animal excrement removal with removable litter Tray in X-ray vision.

115 FIG. 2 - Composition of rotating cylinder.

FIG. 3 - Cylindrical system for animal excrement removal with removable litter Tray, with view of how the parts assemble.

FIG. 4 - Cylindrical system for animal excrement removal with removable litter Tray in operating position and with excrements 120 in removable tray.

FIG. 5 - Cylindrical system for animal excrement removal with removable litter Tray, stage where granular matter exits from removable tray and passes through the filtration grid, causing the finer matter to pass to the interior of the chamber, 125 (partial cut of the front end of the rotating cylinder allowing visualization of the interior) .

FIG. 6 - Cylindrical system for animal excrement removal with removable litter Tray, stage when the clean granular matter is inside the chamber and the excrements are outside, (partial cut 130 of the front end of the rotating cylinder allowing visualization of the interior) .

FIG. 7 - Cylindrical system for animal excrement removal with removable litter Tray, unloading position stage, when the excrements are moved to the excrement removable drawer, the 135 clean litter is inside the chamber and when the tray without litter can be removed, (partial cut of the front end of the rotating cylinder allowing visualization of the interior) .

FIG. 8 - Cylindrical system for animal excrement removal with removable litter Tray, on litter leveling position inside the

140 litter tray.

145

150 Detailed description of the invention

The following invention is comprised of the following:

A basic structure (1) and a rotating cylinder (2) . The basic 155 structure (1) is the support for the whole system, the rotating cylinder (2) is embedded inside it.

The inferior part of the basic structure (1) has an excrement collection drawer (4) and the superior part has a cover for the rotating cylinder. This cover for the rotating cylinder has the 160 function of preventing the litter to exit to the surrounding area through the lateral opening (2.3) of the rotating cylinder (2) while the animal excavates in the litter.

The rotating cylinder (2) is the litter cleansing mechanism. There is an opening (2.3) along the side of the rotating 165 cylinder (2), through which the excrements exit and are directed to the excrement collection drawer (4) . There is an opening in the frontal part of the rotating cylinder for the animal' s entry and exit (2.5) . There is also an opening for the insertion and removal of the removable litter tray (2.4) .

170 In the rotating cylinder's interior (2) there is a chamber (2.1), which is open on one of the sides to the interior of the cylinder through a filtration grid (2.2). The chamber's function (2.1) is to keep the clean litter during the process of excrement removal. The filtration grid's function (2.2) is to

175 only allow the litter with inferior size to its grid to pass to the interior of the chamber, leaving outside of the chamber (2.1) everything that is larger.

In the rotating cylinder (2) is inserted a removable litter tray (3), where the granular matter is placed and where the animal 180 places its excrements (8) . The removable litter tray (3), has a support base (6) in its exterior, which acts as a support for the entry and exit of the animal in the removable litter tray (3) . This support base (6) is directly connected to the interior of the removable litter tray (3) .In the superior part of the

185 support base (6) is a grid (7) for cleaning the litter stuck in the paws of the animal, as the animal exits the removable litter tray (3) it places its paws on the grid (7) over the support base (6) causing the litter stuck in the paws to pass through the grid (7) and make its way back to the removable litter tray

190 (3) . The support grid (6) also functions as a handle for the removable litter tray (3) .

After the removable litter tray (3) is embedded in the rotating cylinder (2), with the granular matter and the rotating cylinder

(2) in embedded in the basic structure (1), the System is ready 195 to use.

To proceed to the removal of the excrements (9), one holds the latch (5), unlocking it (locking system to the cylinders rotation) from position A (use position) and spins the rotating cylinder (2) (clockwise according to the figure sequence of 200 figures FIG. FIG.5 FIG.6 FIG.7), over its generally horizontal axle, toward position B (excrement discharge position) . During this rotation the litter goes out of the removable litter tray

(3) by gravity and as it exits, it passes through the filtration grid (2.2) (FIG.5), causing the clean litter (smaller matter) to

205 pass to the interior of the chamber of the rotating cylinder (2), while the clusters (larger matter, residue, clusters of urine and litter, droppings) remain inside the cylinder (FIG.6).

As the lateral opening on the rotating cylinder (2.3) reaches the inferior part of the cylinder, the clusters fall inside the 210 excrement collection drawer (4) by gravity. When the latch (5) reaches point B, the system locks indicating that the discharge was made (FIG. 7) .

After the discharge is done, with the latch (5), locked on point B, the empty removable litter tray (3) can be removed from the 215 system, because the clean litter is inside the chamber (2.1) . At this stage, the removable litter tray (3) can be washed in a