A device for mixing powders by cryogenic fluid, characterised in that it comprises at least: a chamber for mixing powders, comprising a cryogenic fluid; a chamber for supplying powders in order to allow the powders to be introduced into the mixing chamber; means for agitation in the mixing chamber so as to allow the mixing of the powders placed in suspension in the cryogenic fluid.

A storage and mixing device for the production of a bone cement dough from a monomer liquid and a cement powder as starting components of the bone cement. The storage and mixing device includes: (1) a receptacle having a monomer liquid container which contains the monomer liquid, (2) a cartridge containing the cement powder, (3) a feed plunger, which is accessible from a rear side of the receptacle, arranged in the receptacle, and movable in a longitudinal direction of the receptacle, and (4) a dispensing plunger which is arranged in the cartridge and shiftable in a longitudinal direction inside of the cartridge. The front side of the receptacle is connected or connectable to the rear side of the cartridge with a first securing element on the rear side of the receptacle and a second securing element on the rear side of the cartridge.

The invention also relates to a method for the production of a bone cement dough, in particular of a pasty polymethylmethacrylate bone cement dough, whereby the bone cement dough is produced from a cement powder and a monomer liquid through the use of a storage and mixing device.

Bone cement applicators and methods for application of a bone cement dough, the applicators and methods comprise a tubular cartridge with an internal space, a dispensing plunger for expelling the starting components through an opening of the cartridge opposite from the dispensing plunger, wherein the dispensing plunger is mobile in longitudinal direction in the internal space of the cartridge. The applicators and methods further comprise a hose, an application opening, a three-way valve operable from outside and arranged or arrangeable in the hose or on a side of the hose facing the cartridge, and a collecting container arranged on the three-way valve. The three-way valve is designed and arranged or arrangeable in the applicator such that it, being in a first position, provides a fluid connection between the application opening and the opening of the cartridge and closes a feed-through to the collecting container and, being in a second position, provides a fluid connection between the application opening and the collecting container and closes a passage to the opening of the cartridge.

Turning motion of gypsum slurry spouting onto a sheet of paper for a gypsum board liner is restricted for preventing maldistribution, deviation or irregular dispersion from occurring in the density distribution of the slurry on the sheet of paper. A mixing and stirring device for gypsum slurry has a circular casing forming a mixing area, a rotary disc positioned in the casing, and a tubular passage for feeding the slurry onto the sheet of paper for the gypsum board liner. A chute has a fluid passage portion with its cross section being non-axisymmetric with respect to a center axis of the tubular passage, or a fluid passage portion varying a position of the center axis of the tubular passage by a change or lateralization of the cross section of fluid passage.

A constrictor valve can be associated with a conduit in fluid communication with a mixer to control a flow of cementitious slurry discharged from the mixer through the conduit. The constrictor valve can include a constrictor housing, a webbing constriction assembly, and a drive mechanism. The webbing constriction assembly includes a pair of rotatable members rotatably mounted to the constrictor housing and a plurality of webbing straps connected to the rotatable members and wrapped around the conduit. The drive mechanism includes a drive shaft and a gear assembly configured to rotate the rotatable members in opposing winding directions in response to the drive shaft rotating in a tighten direction to wrap the webbing straps tighter around the conduit to compress it and to rotate in opposing unwinding directions in response to the drive shaft rotating in a loosen direction to loosen the grip of the webbing straps on the conduit.

The present disclosure relates to a blender having blades whose orientation angle is changeable, even while the blender is in operation. The blender 100 includes a housing 110 with inlets (140a, 140b) to allow inflow of ingredients and an outlet (140c) to allow outflow of blended ingredients. The blender 100 incorporates an external shaft 122 with the blades 123 rotatably coupled to it, and an internal shaft 121 inside the external shaft 122. The blender 100 incorporates a first driving unit 130 to rotate the external shaft 122 and blades 123 about a direction along a length of the housing 110 to allow blending of the ingredients. The internal shaft 121 having engaging means coupled to back of the blades 123 such that a linear displacement of the internal shaft 121 using a second driving unit 121, enables change in orientation of the blades 123.

An inerting system for an aircraft and a method of inerting a hydrogen system in an aircraft. Also an aircraft with such an inert system. In the inerting system, a part of an inerting gas that has already been supplied to the casing of the hydrogen system is mixed with pure inerting gas through a fluid recirculation system.

[Object] Behavior of a flow of foam or foaming agent ejected to a gypsum slurry can be stabilized, and a relatively large amount of foam or foaming agent can be homogeneously or uniformly dispersed in the slurry.

[Solution] A mixer (10) has a mixing area (10a) for preparing gypsum slurry (3), a slurry delivery section (4) for delivering the slurry from the mixing area, and a feeding port (60) for feeding foam (M) or a foaming agent to the slurry in the mixing area and/or the slurry delivery section under pressure. The slurry having the foam mixed therein is supplied to a production line (1) for forming gypsum boards or gypsum-based boards. The feeding port is provided with a partition member (62,64,65) dividing an ejecting region (61,61). The ejecting region is divided into a plurality of openings (63), which simultaneously eject the foam or forming agent to the slurry.

There is provided a mixing device. The mixing device comprises a first branch (7) to provide a first substance from a source (3). The mixing device further comprises a reservoir (9) for storing a second, additive substance, the reservoir (9) comprising an inlet (18) for receiving the first substance from the first branch (7). The mixing device further comprises a swirl generator (18A) configured to impart swirl in the first substance entering the reservoir (9) from the first branch (7). The mixing device further comprises a second branch (5) to output a mixture of the first substance and the additive substance from an outlet (17) of the reservoir (9), or the reservoir comprising a vent outlet (17) to output a mixture of the first substance and the additive substance.

The invention relates to a heatable mixer (1) for composite products based on thermoplastic material(s), having an elongate structure defining a longitudinal processing path between at least one inlet and at least one outlet (2) and comprising a heated trough (3) in which two mutually interpenetrating parallel twin screws (4 and 4) are mounted, forming member(s) for dimensionally reducing, heating and moving the products to be processed which are inserted at the inlet, each screw (4, 4) comprising a heated and driven support shaft (5) arranged in the path direction (DT). The mixer (1) is characterised in that it comprises, at the or at each outlet (2), a member (20) for controlling the liquid or semi-liquid output stream of processed products, flowing through the associated outlet (2), advantageously under the effect of gravity.