Described herein are examples of an animal containment system that includes a cable having a first end connectable with a first vertical structure and a second end connectable with a second vertical structure. A first tensioner attached to the first end of the cable and a second tensioner attached with the second end of the cable. The tensioners are configured to tension the cable between the vertical structures. A slider system configured to translate along the cable, the slider system includes a housing having a front wall, a back wall and a top wall. A first pulley, a second pulley and a third pulley. The first pulley and the second pulley are disposed in an upper portion of the housing. The third pulley may be disposed below the first pulley and the second pulley.

An animal tether system and method wherein the rate of extension and retraction of the tether and/or the length of the tether can be actively controlled at least in part as a function of the angular direction and/or speed and/or length of which the tether extends/retracts. The system can be used to maintain an animal in a non-circular boundary, such as a rectangular space, by controlling how far the tether can extend at certain angular positions. The system also allows a user to block off certain areas within a space from access by the animal.

An animal tether system and method wherein the rate of extension and retraction of the tether and/or the length of the tether can be actively controlled at least in part as a function of the angular direction and/or speed and/or length of which the tether extends/retracts. The system can be used to maintain an animal in a non-circular boundary, such as a rectangular space, by controlling how far the tether can extend at certain angular positions. The system also allows a user to block off certain areas within a space from access by the animal.

A dog run assembly for preventing tangling of leads includes a pair of bars, a pair of lines, a pair of connectors, and a pair of fasteners. Each line is engaged to and extends between the bars. Each connector is rotationally engaged to a respective bar and can engage a respective vertical support element of a pair of vertical support elements so that the pair of lines is suspended between the vertical support elements. Each fastener is slidably engaged to a respective line so that the fastener is slidable between the bars. The fastener can engage a respective lead attached to an associated animal. The pair of bars rotates as a pair of animals tethered singly to the lines travel in opposing directions relative to the pair of lines. The lines and the leads attached to the animals remain untangled.

A dog run assembly for preventing tangling of leads includes a pair of bars, a pair of lines, a pair of connectors, and a pair of fasteners. Each line is engaged to and extends between the bars. Each connector is rotationally engaged to a respective bar and can engage a respective vertical support element of a pair of vertical support elements so that the pair of lines is suspended between the vertical support elements. Each fastener is slidably engaged to a respective line so that the fastener is slidable between the bars. The fastener can engage a respective lead attached to an associated animal. The pair of bars rotates as a pair of animals tethered singly to the lines travel in opposing directions relative to the pair of lines. The lines and the leads attached to the animals remain untangled.

The present invention provides methods and systems for a retainer apparatus that includes a scoop having an exterior surface and an interior surface with a central opening and a predetermined length. A retention device has a base with a length greater than the length of the central opening of the scoop and a flange portion extends upwardly from the base portion and contains at least one opening.

The present invention provides methods and systems for a retainer apparatus that includes a scoop having an exterior surface and an interior surface with a central opening and a predetermined length. A retention device has a base with a length greater than the length of the central opening of the scoop and a flange portion extends upwardly from the base portion and contains at least one opening.

A pet tether comprising a flexible and stretchable cord comprising first end and a second end, a first cord clamp and a second cord claim. The first cord clamp is configured to clamp the first end of the cord when the first end of the cord passes through the first cord clamp and loops back into the first cord clamp. The second cord clamp is configured to clamp the second end of the cord when the second end of the cord passes through the second cord clamp and loops back into the second cord clamp.

The present invention relates to an inhalation toxicity testing chamber device for nanoparticles having a plurality of concentrations. The present invention provides an inhalation toxicity testing chamber device for nanoparticles having a plurality of concentrations, which: can supply nanoparticles having different concentrations to particle exposure modules by stacking a plurality of particle exposure modules inside a single chamber housing and by allowing each particle exposure module so as to form an independent space from each other; can perform inhalation toxicity testing of nanoparticles having a plurality of concentrations through a single chamber housing by being capable of exposing the test animals put into each particle exposure module to nanoparticles having different concentrations; can easily perform inhalation toxicity tests of nanoparticles in a small scale laboratory etc. by improving the overall space efficiency as well as reducing the test cost; and can easily perform more diverse and accurate inhalation toxicity tests on nanoparticles by selectively allowing a plurality of particle exposure modules to be in communication with each other or to be formed as an independent space, according to a user's needs, thereby variably applying the space of the particle exposure module without changing the arrangement of the particle exposure module.

The present invention relates to an inhalation toxicity testing chamber device for nanoparticles having a plurality of concentrations. The present invention provides an inhalation toxicity testing chamber device for nanoparticles having a plurality of concentrations, which: can supply nanoparticles having different concentrations to particle exposure modules by stacking a plurality of particle exposure modules inside a single chamber housing and by allowing each particle exposure module so as to form an independent space from each other; can perform inhalation toxicity testing of nanoparticles having a plurality of concentrations through a single chamber housing by being capable of exposing the test animals put into each particle exposure module to nanoparticles having different concentrations; can easily perform inhalation toxicity tests of nanoparticles in a small scale laboratory etc. by improving the overall space efficiency as well as reducing the test cost; and can easily perform more diverse and accurate inhalation toxicity tests on nanoparticles by selectively allowing a plurality of particle exposure modules to be in communication with each other or to be formed as an independent space, according to a user's needs, thereby variably applying the space of the particle exposure module without changing the arrangement of the particle exposure module.