Abstract: A vertically-oriented interactive treat dispensing device for animals provides for storage of treats in a top portion, which then dispenses a treat through an input buffer into a middle portion with a set of adjoining ramps. The treat is initially retained at a resting point at a top of each ramp before it is advanced down the ramps upon physical interaction between the treat and the animal via an interaction opening adjacent the resting point. Once the treat advances down the lowest ramp, it exits the device and can be retrieved by the animal. Additional features may include electronic dispensing of treats from the top portion, incorporation of the device into a play or animal house structure, the use of an interaction lever for advancing the treats, an access arm for accessing the interior housing, and specially-designed disc-shaped treats to roll easily through the device.

Abstract: A dry particle analyzer includes a vibrating sieve cup drizzling particles downwardly with first and second sheath air flows provided to separate the particles from boundary walls and to form the drizzling particles into a curtain for optical analysis. The particles drop vertically as a drizzle with gravitational assistance from a bulk sample to the analysis passage, after which their direction of movement is changed to horizontal and then upward for removal from the analyzer.

Abstract: A particle analyzer includes a vibratory driver for particulate samples which are received in a sample cup to be drizzled under controller vibration to an analysis cell of the analyzer along with a conveying air stream. The driver is arranged to impose orbital oscillatory motion in a vertical plane on the sample cup to roll the sample while assisting in sifting of the sample through conventional sieve screen sample cups. Avoidance of vibratory classification of the sample by particle size while the test is in progress, as well as avoidance of sample compaction is achieved with the described driver. Additionally, an improved predictability of sample feed rate control results from the use of the orbital driver also with a novel sample cup not utilizing a sieve screen, but employing the inherent characteristic of particulate materials to form an repose angle when piled up.