A syringe assembly for a hydraulic fracturing system includes a syringe having a material chamber, a base fluid chamber, and a piston. The material chamber is configured to be fluidly connected to a fluid conduit. The piston retracts to draw material into the material chamber. The piston extends to push the material into the fluid conduit. The syringe assembly includes a diverter fluidly connected to the base fluid chamber and moveable between first and second positions. The first position of the diverter fluidly connects the base fluid chamber to a base fluid reservoir of the hydraulic fracturing system and fluidly disconnects the base fluid chamber from an outlet of a frac pump of the hydraulic fracturing system. The second position of the diverter fluidly connects the base fluid chamber to the outlet of the frac pump and fluidly disconnects the base fluid chamber from the base fluid reservoir.

Labor-saving paint mixing cover comprises a paint outlet mechanism used to control outflow of a paint material, two or more pressing mechanisms pressing together a paint container and a cover. Each of the pressing mechanisms comprises: a through hole on the cover; a pressing rod passing through the through hole; a sealing sleeve sleeved over the pressing rod, and comprising a sealing sleeve folded edge pressing on the cover; a compression spring sleeved over the pressing rod between the sealing sleeve folded edge of the sealing sleeve and a handle at the upper end of the pressing rod; and a pressing foot located at the lower end of the pressing rod. The handle at the upper end of the pressing rod is a cam lifting handle comprising the upper end of the pressing rod and a cam hinged thereto. A cam surface of the cam lifting handle is in contact with an upper surface of a cam base. The cam base is a movable sleeve sleeved around the pressing rod. A movable sleeve folded edge is provided on the movable sleeve. An upper end of the compression spring presses against said folded edge of the movable sleeve.

A mixer for ceramic feedstock pellets includes a tank, a mixing device within the tank, and a heat exchanger including a cooler for cooling of the content of this tank. A controller controls the heat exchanger which includes a heater arranged to heat the content of this tank to a temperature comprised between a lower temperature (TINF) and a higher temperature (TSUP) stored in a memory for a specific mixture. The heater exchanges energy with a heat exchanger and mixing temperature maintenance circuit, external to this tank. The thermal inertia of this circuit is higher than that of this fully loaded tank.

A contra-rotating multi-layer propeller unit for multi-phase flow according to an exemplary embodiment of the present disclosure includes: a shaft part; a front propeller and a rear propeller connected to the shaft part; an air collection part including a predetermined space therein and the shaft part positioned in the internal space; and an air supply pipe configured to supply air into the air collection part, and a rear propeller blade includes a two-phase blade connected to a rear propeller hub, a layer structure of which an inner surface is connected to an end portion of the two-phase blade, and a single-phase blade positioned at a location corresponding to the two-phase blade on an outer surface of the layer structure.

The invention of the present disclosure is that of functional packaging systems useful for reducing the separation of solid and liquid constituents of its contents. The invention is particularly useful for preventing the undesirable separation of solid and oil phases of food products such as natural peanut butter that is manufactured without the use of undesirable additives such as hydrogenated vegetable oils, lecithin, monoglycerides, diglycerides and other substances that slow separation of the solid and oil phases from one another. In one embodiment, the invention comprises a container with a rotating base which when rotated actuates the agitation of the product contained within, as a result of the concurrent rotation of one or more axes configured with an agitator or equivalent means of stirring or mixing the contents. The invention is further provided with hermetic sealing means and the like to ensure food safety.

An immersion mixer includes: a housing; a drive motor residing within the housing; a shaft attached to the motor and configured to rotate relative to the housing; blades attached to and rotatable with the shaft; a handle attached to the housing, the handle including a first segment and a second segment attached to the first segment and to the housing; and a trigger attached to the handle and operatively associated with the motor. The trigger includes a first segment that is generally parallel with the first segment of the handle and a second segment that is generally parallel with the second segment of the handle. Engagement by a user of either the first segment of the trigger or the second segment of the trigger causes the drive motor to rotate the shaft and blades.

A method for processing a fluid includes removably securing a retention member to a vessel that bounds a chamber; inserting a collapsible bag within the chamber of the vessel; securing the bag to the retention member so that the bag is supported within the chamber of the vessel; and dispensing a fluid into a compartment of the collapsible bag supported within the chamber of the vessel. The fluid can be mixed within bag while the bag is disposed within the vessel.

The present invention provides microfluidic devices and methods for using the same. In particular, microfluidic devices of the present invention are useful in conducting a variety of assays and high throughput screening. Microfluidic devices of the present invention include elastomeric components and comprise a main flow channel; a plurality of branch flow channels; a plurality of control channels; and a plurality of valves. Preferably, each of the valves comprises one of the control channels and an elastomeric segment that is deflectable into or retractable from the main or branch flow channel upon which the valve operates in response to an actuation force applied to the control channel.

Techniques for additive construction of structures and production of additive construction materials are described, including a 3D printing assembly including a container configured to store a material, a mixer configured to mix the material to provide an extrudable mix including cementitious material, and a dispenser configured to receive the flowable mix from the mixer and to provide the flowable mix under one or more controlled parameters to form a structure, and a controller configured to receive a value associated with a material property parameter of the material, to generate a mixture by inputting the value into a machine learning algorithm, the mixture being generated using, by the controller, another value associated with a control parameter configured to control operation of the 3D printing assembly, and using the 3D printing assembly to print a structure using the mixture.

A slurrying device includes a slurrying tank and a rotor stirrer. The rotor stirrer includes a stirring drum, a transmission gear arranged at an end face of the stirring drum configured to face the slurrying tank, and a rotor stirring rod configured to extend from the stirring drum and into the slurrying tank to stir a slurrying liquid in the slurrying tank. The rotor stirring rod is meshed with the transmission gear and configured to revolve along a planar trajectory of the transmission gear while simultaneously rotating. The rotor stirrer further includes a driving device provided at the stirring drum and configured to drive the rotor stirring rod to rotate via the transmission gear.