Abstract: A device (10) for mixing and dispensing bone cement includes a mixing cylinder (20), in which a mixing plunger (21) is arranged, the mixing plunger (21) being axially movable by an actuation rod (50) guided out in a sealed manner at a first cylinder end (30). A sealing plunger (42) is arranged in a region of the first cylinder end (30), is axially movable on the actuation rod (50) and seals the mixing cylinder (20) in a gas-tight manner. A sterilization plunger (41) is arranged in the region of the first cylinder end (30) between the mixing plunger (21) and the sealing plunger (42), is axially movable on the actuation rod (50) separately from the sealing plunger (42), and seals the mixing cylinder (20) in a gas-permeable manner. The sterilization plunger (41) and the sealing plunger (42) form a two-part plunger system (40).

Abstract: A mixing capsule, especially for the production of dental materials, comprises a cartridge that is closed on one end by a piston. The piston has a hemispherical recess that forms a secondary chamber and is closed off from the main chamber of the cartridge by a separating device. A body that is provided in the initial state in the main chamber is used to facilitate the mixing process and to penetrate the separating device at the beginning of the process, whereby the main chamber and the secondary chamber form a single mixing area. The body preferably disintegrates during the mixing process.

Abstract: There is provided a mixer for a capsule for dental restoration material used for mixing a powder component and a liquid component in a capsule accommodating therein the powder component and the liquid component for restoration of a tooth in the dental remedy field, by rendering a mixing compartment in vacuo so as to make it in a good state where the mixture does not substantially contain air bubbles.

Abstract: There is provided a mixer for a capsule for dental restoration material used for mixing a powder component and a liquid component in a capsule accommodating therein the powder component and the liquid component for restoration of a tooth in the dental remedy field, by rendering a mixing compartment in vacuo so as to make it in a good state where the mixture does not substantially contain air bubbles.

Abstract: There is provided a mixer for a capsule for dental restoration material used for mixing a powder component and a liquid component in a capsule accommodating therein the powder component and the liquid component for restoration of a tooth in the dental remedy field, by rendering a mixing compartment in vacuo so as to make it in a good state where the mixture does not substantially contain air bubbles.

Abstract: A livestock mixer and feeder apparatus operates efficiently to minimize the time and facilities necessary to service a modest feedlot. The large mixing chamber utilizes a vertical auger operating at high speed to quickly perform the mixing procedure and is run by a high power hydraulic motor. A moveable base, such as a pickup, supplies the need power-take-off capability and produces efficient feedlot operation, since the apparatus can be quickly loaded and unloaded. Prudent sized inlet and outlet augers complete the apparatus and are also powered by hydraulic motors.

Abstract: A multi-component, mixing, storage and dispensing package (10) has a housing 11, a displaceable cavity block (20) having at least one cavity (21) therein. A vent spike block (40) having at least one spike (42) held in an opposing relation to at least one cavity (21) is provided within the housing (11). When cavity block (21) is caused to move toward the vent spike block (40) spike (42) is caused to enter a cavity (21). A vent (43) is in fluid communication through the spike (42) with a mix channel (51) and a mixing and dispensing tip (50).

Abstract: There is provided a mixer for a capsule for dental restoration material used for mixing a powder component and a liquid component in a capsule accommodating therein the powder component and the liquid component for restoration of a tooth in the dental remedy field, by rendering a mixing compartment in vacuo so as to make it in a good state where the mixture does not substantially contain air bubbles.

Abstract: A capsule holder for retaining a mixing capsule on a rotary mixing device includes a carrier plate 10, an actuator disk 11 rotatable relative to the plate, and two retaining arms 12, 13 for clamping the capsule from opposite sides, the retaining arms having driving pins 22 engaging spiral cam slots 26 of the actuator disk 11. By rotating the actuator disk 11, the retaining arms 12, 13 are moved away from, or toward, each other. The thus constituted gearing is self-locking in one direction of force transmission so that centrifugal forces exerted on the retaining arms 12, 13 during rotation cannot move the arms apart. On the other hand, the retaining arms 12, 13 are opened with little effort by rotating the actuator disk 11.

Abstract: A kit for facilitating the mixing of ingredients in a medical office. The kit includes at least one free-standing, disposable bowl and one dual-purpose disposable spatula. Each free-standing, disposable bowl has a closed bottom for supporting the bowl in an upstanding position. An integrally molded, radially, outwardly extending planar lip around the periphery of the top imparts rigidity to the bowl. The free-standing disposable bowl can then be used for mixing ingredients without the requirement for any additional support structure. The dual-purpose spatula has one shape that conforms to the bowl for optimizing the mixing of one set of ingredients and another shape at the other end thereof for optimizing the mixing of other ingredients.

Abstract: A mixing device has a swing arm and securing arms, for receiving and securing a mixing capsule within the mixing device, connected to the swing arm. The securing arms include at least one moveable securing arm that is movably connected to the swing arm and at least one stationary securing arm that is fixedly connected to the swing arm such that the moveable securing arm is moveable relative to the stationary securing arm. An inertia mass acts via at least one of the securing arms onto a mixing capsule received in the securing arms.

Abstract: A capsule holder for retaining a mixing capsule on a rotary mixing device includes a carrier plate 10, an actuator disk 11 rotatable relative to the plate, and two retaining arms 12, 13 for clamping the capsule from opposite sides, the retaining arms having driving pins 22 engaging spiral cam slots 26 of the actuator disk 11. By rotating the actuator disk 11, the retaining arms 12, 13 are moved away from, or toward, each other. The thus constituted gearing is self-locking in one direction of force transmission so that centrifugal forces exerted on the retaining arms 12, 13 during rotation cannot move the arms apart. On the other hand, the retaining arms 12, 13 are opened with little effort by rotating the actuator disk 11.

Abstract: A device for mixing a dental ceramics composition is being proposed in which the mixing board (4) consists of a ceramic plate provided with a plurality of parallel channels (7).

Abstract: A preassembled collection of disposable mixing apparatus and constituent components needed for the vacuum mixing and preparation of bone cement and packaged as a single disposable kit is disclosed. The kit includes a contoured storage tray, ampules of liquid cement monomer, packets of powder cement copolymer, a small portable vacuum pump, connecting tubing with a vacuum indicator, a mixing cartridge, a cartridge cap and agitator, an assortment of connectable cement nozzles, and a funnel attachment. The kit can be packaged as a single unit for convenient and efficient use in the sterile environment of an operating room. The disposable telescoping mixing cartridge of the kit employs a telescoping mixing cartridge with a vacuum release mechanism.

Abstract: A capsule for dental compositions has a mixing chamber for mixing a dental composition that contains a first component of the dental composition and has a bottom with an outlet opening for the dental composition. A piston is positioned in an initial position at an upper end of the mixing chamber. The piston has at least one recess and an inner chamber containing a second component of the dental composition. The inner chamber has a bottom in the form of a temporary seal. A plunger is positioned in an initial position at an upper end of the inner chamber of the piston. Upon depressing the plunger, the temporary seal is broken to introduce the second component into the mixing chamber. A manually removable U-shaped locking member has two legs and a connecting bar connecting the legs wherein the connecting bar is elongate in a direction pointing away from the legs to form a grip portion.

Abstract: The planetary centrifugal mixer comprises a fixed axis (4) on which is rotatably mounted an arm (10) carrying a fixed rod (11) extending upwardly. The arm (10) is rotated about the axis (4) by means of a drive pinion (9), and at the same time a mixing bowl (22) fitted on the rod (11) is rotated about the rod, the drive pinion (16) of the bowl (22) being coupled by an intermediate pinion (18) to a pinion (19) integral with the fixed axis (4). The side wall (24) of the bowl (22) has at least two segments (28), the curvature radius being greater than that of the remaining segments (27). A central guide (29) projects from the bottom (23) of the bowl (22), its outer shape being matched to the shape of the lateral wall (24).

Abstract: A mixing arm assembly suitable for mixing the contents of a capsule which includes a support arm in the form of an elongated member having two ends with one end of the arm adapted for connection to an agitator suitable for mixing the contents of a dental capsule. The distal end of the arm containing a moveable jaw assembly adapted to receive and hold a dental capsule in a closed locked position during mixing.

Abstract: An automatic vacuum mixer-washer apparatus is described. In this apparatus, a mixing vessel moves automatically from load-unload position to mix-wash position and back to the load-unload position after completing either the mixing cycle or the washing cycle. The mixing means connects automatically to the driving means, thereby activating a timer to control the duration of the mixing and washing cycles. This vacuum mixer-washer apparatus is especially useful for mixing dental materials under vacuum and automatically washing the mixing means after removing said mixed dental materials.

Abstract: A capsule mixing device which comprises a motor suitable for powering a vibrating mixing arm with vibrating device connected to the motor having at one end thereof an arm for holding a capsule in place during mixing, and card actuator suitable for activating and controlling the motor at a predetermined speed for a predetermined length of time whereby materials contained within the capsule are mixed to a predetermined desired state by action of the vibrating device on the arm.

Abstract: The present invention relates to a preparation method of a paste by mixing at least one constituent substance in a solid form, notably a powder, with at least one constituent substance in a liquid form, mechanically kneading the mixture under vacuum and subjecting said mixture to vibrations under vacuum.According to the invention, the mixture is subjected to a vibration field during at least the final phase of the mechanical kneading in a device comprising a base (2), a bowl of revolution (28) carried by said base, a cover (21) closing said bowl in a tight manner, an evacuation duct (10) opening into the bowl and kneading blades (27), the bowl being suspended underneath the cover and removably connected to said cover with means (11a, 11b) for imparting vibrations to the cover and bowl assembly via the cover.The present invention applies to the preparation of alginate, plaster or similar substances based pastes.

Abstract: Arrangement for operating a multi-component mixing capsule, in particular for dental purposes, by means of a vibratory mixing device, to activate the capsule and to mix the contents of the capsule. The mixing capsule contains a mixing space and a chamber to receive a foil sachet containing a liquid component. The chamber is delimited by two walls, one of which can be moved towards the other to activate the capsule, that is to empty the foil sachet in the mixing space. This takes place according to the invention by means of a first striking body, which as a result of mixing vibration is accelerated against the chamber wall.

Abstract: A dental paste dispensing apparatus includes a molded plastic cup having an open mouth defined by a rim and has an interior for containing dental paste material. A locking mechanism is disposed within the interior for preventing the dental paste material contained therein from rotating with a rotating applicator which is dipped into the paste to obtain an appropriate amount for professional application to the teeth.

Abstract: A flexible, disposable ampule is pre-dosed with a first ingredient, and a second ingredient is introduced into the ampule immediately before a mixing operation. The ampule conveniently fits within a rigid capsule adapted for use with a dental amalgamator which, when activated, thoroughly mixes the ingredients within the ampule. After the ingredients are mixed and the preparation is formed, the ampule is removed from the capsule and the preparation is dispensed by establishing an outlet opening and compressing the ampule between the distal phalange segments of a thumb and a finger.

Abstract: Multi-component mixing capsule having an ejection device, in particular for dental purposes. A receptacle part (1) forming a mixing chamber (5) contains a piston (2) which for its part comprises an accommodation chamber (31) for a film container (32) and a ram (3). To enable the ram (3) to be pushed forward inside the piston (2) in order to transfer the film container contents into the mixing chamber (5) without the piston (2) being displaced in the receptacle part (1), the piston (2) is provided on a portion protruding rearwards beyond the receptacle part (1) with a radial projection which is supported on the tool or on the rearward end face (17) of the receptacle part (1). Support ends as soon as the ram (3) has travelled the necessary distance in the piston (2) to empty the film container (32). For this purpose, the projection (22) may have the ability to be torn off from the piston or bent inwards.

Abstract: A mixer for dental capsules has a fork-type capsule holder which includes a pair of rigid arms (1, 2) one of which is provided with a pin (10) that passes through an opening (11) provided in the other arm (1). A helical spring (13) disposed about the pin (10) creates a tilting moment about the capsule holding location which causes the pin (10) to be caught by edges forming the opening (11), thereby producing a self-locking action which is not released during the mixing movement. For inserting and removing a capsule (5) in the inoperative condition of the mixer, the fork may be readily opened by pulling a handle (16) provided on the one arm (2) against the relatively weak force of the spring (13).

Abstract: A mixing apparatus includes a capsule having two or more segments which nay be uncoupled or opened for adding additional ingredients to a pre-dosed ingredient just prior to the mixing operation. The capsule includes a port which is brought into registration with a vacuum port and an adjacent passageway carried by an arm of a dental amalgamator when the capsule is mounted on the arms, and sealing engagement of the perimeter of the capsule port with the port carried by amalgamator arm enables the establishment of sub-atmospheric pressure conditions within the capsule during the mixing operation. Optionally, the ingredients are mixed in a disposable ampule carried within the capsule, and vacuum conditions are established both internally and externally of the ampule for preventing unintentional compression of the ampule. The apparatus is particularly useful for mixing materials which, after mixing, have a consistency ranging from a light cream to a thick, viscous paste.

Abstract: A capsule for dental amalgam comprises a reservoir portion which has an open end and which contains the silver or silver alloy powder component of the amalgam and a cap portion which has an open end which is meant for containing the liquid or mercury component of the amalgam. A preferably funnel-shaped partition is fixed to the cap portion for retaining the mercury component therein. An orifice is provided in the base of the funnel-shaped partition. The orifice is of a size to prevent leakage of the mercury when the capsule is exposed to accelerations which are below a threshold value and which are typical for storage and transport of the capsule. When the capsule is exposed to acceleration above this threshold value, for example, when the capsule is placed in an amalgamator for mixing the components with each other, the mercury is forced through the orifice and into the powder component.

Abstract: A device to mechanically decompose a barrier which separates two or more mutually miscible ingredients and mixes the said ingredients, preferably a mixer for amalgam in capsules. The device 1 comprises first members to fixedly hold the said ingredients and second members to impart to the said ingredients a sufficiently rapid motion to accomplish the said barrier decomposition and mixing.The said first members comprise a closable space 4 into which the said ingredients and said capsule 2 respectively are admissible and by which these or this respectively is or are respectively aligned with the said second members 14, 15. The said second members 14, 15 are arranged to be started only upon or after closing of the said closable space 4.

Abstract: A method and a device for mixing dental impression materials comprising a motor-driven rotatable turntable with two mixing plates which are successively and detachably secured thereon. The components of thick and thin viscosity, elastomeric dental impression materials are homogeneously mixed together, respectively, on each of the plates as those plates are independently rotated on the turntable.

Abstract: An amalgam-preparing chamber and mercury-capturing device therefor, which includes an amalgam-preparing chamber which is positioned on top of a mercury-capturing device, and wherein:(a) the amalgam-preparing chamber includes a space enclosed by a wall having a plate base at the lower end of the space, and wherein the wall has a transparent section, the base having a plurality of small openings into the mercury-capturing device; and an amalgam-preparing device in the enclosed space, and whereby the enclosed space is exposed to view by the transparent section in the wall, and further wherein the chamber has an openable door therefore; and wherein:(b) the mercury-capturing device includes:(i) an upper closed separation chamber in flow communication with the openings in the base, and(ii) a lower mercury vapor treatment chamber, wherein the upper and lower chambers are separated by an inclining partition which extends downwardly into a mercury reservoir groove with a discharge cock at the lower edge thereof, and w

Abstract: The invention relates to a method and a capsule for the storage and mixing of the two co-reactive basic materials for dental amalgam. The capsule comprises an elastically bendable length of tube bent into V-shape with the arms each forming chambers and with the tip between the arms forming a point of separation between the chambers. Each of the basic materials is accommodated and stored in its own chamber and can be mixed by straightening out the length of tube, the ends of which are sealed, so that the point of separation is opened up, and by shaking the length of tube in its axial direction. The invention also relates to a method in manufacturing the capsule in which the tube length prior to bending into V-shape is pre-shaped in one section at the center of the length of the tube by providing two transverse points of compression which are mutually separated by an intervening section.

Abstract: A two-piece, two chamber self-activating capsule having mercury in one chamber and metal powder in the other. In use, the capsule is shaken and the resulting force due to the inertia of the mercury forces its way through a normally-closed valve into the metal powder chamber, whereby the metal powder and mercury become triturated by the shaking and form dental amalgam for filling teeth. A pestle may be included to facilitate mingling and triturating the amalgam components.

Abstract: Mixing container for manufacturing dental preparations with a first part that contains a powdered material and a second, separable part that contains a liquid in a destructible foil bag.The bag is destroyed by a movable pestle. The resistance to ripping of the foil bag and the pressure impulse acquired by the pestle when the container is shaken in an oscillating mixer are proportioned to result in the destruction of the bag when struck by the pestle. The pestle has elevations and guides in preferred embodiments.

Abstract: An automatic dental amalgam dispenser-mixer comprising a first reservoir for silver powder and a second reservoir for mercury, dispensing and metering means for each material, and a mixer equipped with a recovery cup at its outlet. The dispensing and metering means includes a pair of separate conveyors--one for the silver powder and one for the mercury--each rotationally mounted in a sleeve having an inlet in communication with the associated reservoir and an outlet leading to the mixer. The rotational movement of each of the conveyors is separately controlled through stepping motors. An electronic control unit has a stored program for controlling the actuation of each of the conveyors and the mixer, and a keyboard and display for entry of the parameters of the desired mixture.

Abstract: A mixing capsule assembly, particularly for use in preparing dental amalgams, comprises an outer capsule for receiving one of the materials to be mixed, and an inner capsule to receive a second material to be mixed and to be enclosed within the outer capsule. The inner capsule includes two sections attachable together by complementary frictionally-engaging surfaces of conical configuration. The arrangement is such that when the inner capsule is impacted against an inner face of the outer capsule during the vibration of the assembly, the complementary surfaces are moved away from each other to permit some of the second material to pass between them and to mix with the material in the outer capsule; and when the inner capsule is impacted against the opposite inner face of the outer capsule, the complementary surfaces are moved back to block the passage of material between them.

Abstract: A combination capsule adapted to both mix a plurality of ingredients to prepare them for use and then extrude the same through a nozzle attachable to one end of the capsule which comprises a pair of reciprocal sleeves respectively having compartments to contain different ingredients confined therein prior to the ingredients being brought into contact and the capusle being arranged to cause the ingredients to be brought together by pushing one sleeve into the other to rupture a membrane in the latter, whereby the ingredients may be agitated to mix them, followed by exchanging a cap on the outer end of the inner sleeve for an attachable nozzle and the outer end of the outer sleeve being closed by a closure having a flangible section adapted to be pushed into the sleeve and serve as a plunger to effect removal of the mixed ingredients through the nozzle.

Abstract: The present invention relates to a capsule for storing and vibration mixing of two component materials for dental application, particularly of dental amalgam components. The capsule encloses a mixing space in which a first component and a pestle are disposed. The pestle is in the form of a hollow body with a removable cover. The pestle serves as a container for a second component and has at least one opening. The opening permits the exit of the second component which opening is rendered passable as a result of a mixing vibration movement.

Abstract: A sample vial for use in comminuting and blending material samples for spectrochemical analysis has a vial body section of a cylindrical configuration with a closed recessed bottom end having an inner concave semi-spherical surface. The body section has an opened top end with an inner flange surrounding the same. A cover member is also of a cylindrical configuration and has a closed recessed top end with the inner surface of the cover member of a concave semi-spherical shape. The cover member has an inner peripheral flange for insertion into an opened top end of the vial body section to form a friction fit closure which acts as a seal to prevent particle material from leaking out of the vial. The composite internal hollow of the vial provides a smooth uniform surface to allow a pestle to traverse the same when the vial is vibrated.

Abstract: The present invention provides a self activating multicompartment container comprising an outer wall defining a chamber, a partition dividing the chamber into first and second compartments, a first, high specific gravity liquid component of a composition contained in the first compartment and a second component of the composition contained in the second compartment, wherein the container may be subjected to rapid oscillatory motion so as to cause the high specific gravity liquid component to rupture the partition so that admixture of the components takes place.The container of the invention is useful for storage, transportation and admixture of the components of compositions in which one component is a high specific gravity liquid such as mercury, an example of such compositions being dental amalgams. The container may be activated by being inserted in a vibratory mixture and does not require the use of a plunger.

Abstract: A blender for dental impression materials - alginates and dental stones, for example--is provided with a multispeed electric motor for actuating a turntable through a speed reducing geartrain. The turntable surmounts a substantially rectangular enclosure for the drive components. A handgrip for the user is provided in a narrow end of the enclosure, near a control switch for the drive motor. A flexible rubber bowl is removably mounted on the turntable and receives the materials to be blended. Elastomeric support strips along the base of the enclosure are carried over an angled rear panel of the lower half of the housing, so as to provide nonskid support means as the enclosure is tilted to facilitate the blending process by moving the rotational axis of the bowl away from the vertical.

Abstract: The invention provides a dental amalgamator which prevents mercury vapor, given off during amalgamation, from polluting the air in the neighborhood of the amalgamator. The amalgamator comprises a casing carrying a capsule holder and a drive means for the holder, a lid movable to a closed position in which it cooperates with the casing to form an enclosure for a capsule held by the holder, the enclosure having air inlets allowing air to flow from the atmosphere into the enclosure. A vacuum pump is arranged to communicate with the enclosure via a mercury filter medium, so that during amalgamation air is drawn into the enclosure, over the capsule, and then through the mercury filter where mercury vapors are removed.

Abstract: A dental alloy container is provided with an insert which includes a concave surface that is directed against the blind end of a receptacle to define an isolated, enclosed cavity, separate from the larger enclosure of the container. Access between the larger enclosure and the separate cavity normally exists, except when a threaded barrel is used to force the insert against the blind receptacle end to isolate the cavity. A cap on the container seals the larger enclosure. A drop of mercury can thereby be placed in the isolated cavity and maintained separate from a quantity of silver until it is desired to mix the mercury and silver, immediately prior to use, to form a dental alloy.

Abstract: A device for containing a substance and adapted to release the substance into a vial comprising a container adapted to be supported on the vial having a cylindrical space adapted to contain the substance with a closing bottom connected thereto for closing the cylindrical space and retaining the substance. A piercing piston is slidably mounted within the cylindrical space of the container and provided with a lower piercing point for piercing through a weakness defined between the container and its closing bottom. A vertically and circumferentially extending groove is defined in the container within the circumferential space and a projection is defined on the piercing piston which in engaged within the groove.

Abstract: A support casing mounts a laterally extending guide track system for positioning an open top receptacle in mixing position where it receives an overhanging bladed rotor carried by a gear box connected to a drive motor. The receptacle is longitudinally split with a guide flange around its open upper end and when mounted on the track system its lower end is tightly pocketed in a flanged fitting, the flanges of the receptacle and fitting sliding into upper and lower tracks of the guide track system. After mixing the receptacle may be removed from the track system and a plunger inserted for controlled dispensing of the mixed material through an opening in the receptacle bottom.

Abstract: A device for storing, transporting and mixing reactive ingredients, such as mercury and silver for dental amalgam, includes a thin, rupturable membrane dividing the two chambers of a capsular container into two non-communicating closed compartments, one for each of the reactive ingredients, the chamber of larger volume (major chamber) also including a pestle. Unlike conventional devices of this type, the membrane is ruptured substantially completely intact, i.e. without presenting any loosened or torn fragments of the membrane which could contaminate the mixed ingredients simply by inserting the capsule in an amalgamator or similar vibrating or shaking device. Since no manipulation of the capsule, such as telescoping, bending, twisting etc is required, mixing of the components can be performed with a minimum amount of effort.

Abstract: A multi-chamber pack comprising at least two chambers separated by a frangible partition and externally operable means for breaking the partition, and means for mixing the contents of the chambers. The mixing means are formed by an agitator element operative by rotation, more particularly one or more vanes, said element being disposed rotatably in one of the chambers. An actuating element is disposed rotatably on the outside of the pack and is coupled to the agitator element so as to rotate therewith and serves to drive the latter. The means for breaking the partition are in the form of a push rod fixed to an inwardly deformable wall part of the pack.

Abstract: A mixing capsule for mixing a first material with a second material (e.g. to prepare a dental silver amalgam) comprises a pair of tubular housing sections removably attached to each other and defining between them a first chamber for receiving the first material to be mixed. The second housing section includes a partition integrally joined to its inner surface by a thin connecting web, and a tubular neck above the partition. A plunger is disposed in the neck of the second housing section, the lower face of the plunger defining with the partition a second chamber for receiving the second material to be mixed, the plunger being depressable to cause the partition to be severed along its connecting web from the inner surface of the second housing section and thereby to cause the material in the second chamber to drop into and mix with that in the first chamber.

Abstract: An efficient agitator system capable of high speed agitation without excessive vibration is provided by use of an inclined-axis portion on a motor drive shaft and providing a driven oscillatory member coupled thereto with high speed bearing means and arranged to be agitated but not rotated about the drive shaft axis. A highly durable plastic flexing member is provided, one end being fixed relative to the drive motor and the opposite end being attached to the driven oscillatory member to flex outward and inward as the shaft rotates while restraining the oscillatory member against rotation. Transmitted vibration is minimized by resilient mounting of the base and by providing intersection of the motor shaft axis and the inclined axis substantially centrally within the driven oscillatory member.

Abstract: A capsule holder for a dental amalgamator which holds a capsule firmly for high speed amalgamation but which allows easy insertion and removal. The holder has a body with a spring containing cavity at one end capable of receiving a first end of a capsule when this is inserted at an angle to the axis of the recess, and at the other end of the body there is provided a pivotable retainer for the second end of the capsule. The retainer has a concave surface which in a first position of the retainer receives the second end of the capsule when the first end has been inserted into the cavity with little compression of the spring, and the retainer is pivotable in an over-center manner to move the capsule against the spring force and into a second position in which the capsule is held firmly between the spring and the retainer, the retainer being prevented from moving beyond this second position.