The disclosure is directed to a sample preparation apparatus for grinding or homogenizing test samples. More specifically, the disclosure relates to grinding samples using rotational and linear motion. Grinding samples can be accomplished with an apparatus with a slider-crank mechanism that is attached to an oscillating connecting linkage. The amplitude of oscillatory motion can be greater than or equal to a length of a sample processing chamber.

Sample processing methods and apparatus are discussed. In some cases, apparatus are discussed that include: a mixing element having a first volume and a mixing chamber. The first mixing volume comprises: a sealed first housing having a first interior region, a sensor set disposed in the first interior region and configured to sense a set of characteristics of the mixing element, and a wireless transmitter disposed in the first interior region and configured to communicate the set of characteristics. The mixing chamber comprises a liquid port and a second housing having a second interior region. The mixing element is disposed in the second interior region having a second volume, and the liquid port configured to transmit the liquid into the second interior region.

An agitation apparatus according to an embodiment is used in a container which contains contents and an agitation tool magnetically attractable to agitate the contents. The agitation apparatus includes a first rotating member which rotates about a first axis. The first rotating member has a first locating surface on or above which the container is placed and a first magnet located away from the first axis. In a state where the container is placed on or above the first locating surface, the agitation tool is rotated about the first axis as the first rotating member rotates about the first axis.

An agitation apparatus according to an embodiment is used in a container which contains contents and an agitation tool magnetically attractable to agitate the contents. The agitation apparatus includes a first rotating member which rotates about a first axis. The first rotating member has a first locating surface on or above which the container is placed and a first magnet located away from the first axis. In a state where the container is placed on or above the first locating surface, the agitation tool is rotated about the first axis as the first rotating member rotates about the first axis.

The invention relates to a freezable agitator for mixing and chilling beverages without requiring external cooling sources. Traditional mixing devices may assist with mixing but do not address the challenge of maintaining a cold beverage temperature without requiring external cooling sources. This challenge is especially evident when users are on the go, where refrigeration is typically unavailable. Users often add ice as a workaround, which can dilute the beverage and diminish flavor and consistency. The agitator comprises a sealed hollow body partially filled with a freezable liquid and formed with two continuous spiral ridges. The ridges promote mixing when the agitator is shaken inside a beverage container, while the internal freezable medium chills the beverage over time. The design eliminates the need for ice or external cooling sources, providing a reusable solution for maintaining cold, well-mixed drinks throughout the day.

A liquid eyeliner pen includes a barrel, an accommodating cavity is formed in the barrel, the barrel is connected with a liquid delivery assembly, an end of the liquid delivery assembly is in communication with the accommodating cavity, the barrel is connected with a cap configured for covering the liquid delivery assembly, a stirring element with a stirring end is slidably connected in the accommodating cavity, and the stirring end is located at a dead corner.

A liquid eyeliner pen includes a barrel, an accommodating cavity is formed in the barrel, the barrel is connected with a liquid delivery assembly, an end of the liquid delivery assembly is in communication with the accommodating cavity, the barrel is connected with a cap configured for covering the liquid delivery assembly, a stirring element with a stirring end is slidably connected in the accommodating cavity, and the stirring end is located at a dead corner.

A dust generation apparatus is disclosed. The dust generation apparatus includes: a drum defining a drum chamber for receiving a sample; an agitation system in the drum chamber for agitating the sample to generate an aerosol of the sample in the drum chamber, the agitation system including: at least one first agitator rotatably mounted about a rotational axis extending through the drum chamber to stir the sample in the drum chamber; and a plurality of second agitators configured to tumble in the drum chamber during rotation of the at least one first agitator.

A slurry mixing device includes: a lower housing including an accommodation portion that accommodates slurry and having an open upper side; an upper cover located above the lower housing and having one or more inlets; an agitator having one side located inside the lower housing to mix the slurry; and one or more first mixing members located inside the lower housing.