Abstract: A modular platen assembly comprises an annular hub, a wiper ring assembly and a coupling ring. The annular hub is for connecting to a ram of an inductor pump. The wiper ring assembly includes an annular wiper for sealing with a container. The coupling ring is independently joined to the hub and the wiper ring assembly at first and second connections, respectively.

Abstract: An applicator for extruding strings of cake icing or other flowable semi-solid material comprises a longitudinally slotted screw rotated in a fixed nut and thereby advanced longitudinally in a tube, and a rotating nozzle assembly having a partition extending into the slot or slots of the screw whereby the nozzle assembly rotates with the screw as the screw advances. Pistons formed at an end of the screw fit cylinders formed by the interior wall of the tube and the partition to eject icing through one or more nozzles of the rotating nozzle assembly.

Abstract: A material dispensing pump includes a drip prevention system and method so as to avoid undesired dripping of the dispensed fluid. In one example, the fluid path is sealed. Positive pressure is applied to the fluid during a dispensing operation to present the fluid to the auger-style pump at a desired rate. Between dispensing operations, or when dispensing is completed, the fluid is placed in suspension, for example by applying a negative pressure, thereby preventing the fluid from being inadvertently released at the dispense tip. In addition, following a dispensing operation, the pump dispensing controller can be programmed to reverse the rotation of the feed screw, in order to draw the material in a reverse direction and to further suspend the fluid.

Abstract: A syringe press includes a housing, a compressible member, and a compression mechanism. The housing includes a longitudinal axis, a first end and a second end. The housing is configured to support a syringe, which includes a cylinder configured to contain a fluid, and a piston having a seal configured to move within the cylinder, between the first and second ends. The compressible member is supported by the housing between the first end and the piston. The compression mechanism is supported by the housing and is configured to apply a compressive force to the piston, the cylinder and the compressible member, between the first and second ends and along the longitudinal axis. The piston is driven into the cylinder, and fluid is driven through an output of the cylinder responsive to the compressive force.

Abstract: The present invention relates to a cartridge for holding liquid, paste-like or powdered compounds and a piston for closing such a cartridge, and a system made up of such a cartridge, comprising a tool (15), wherein the piston comprises a cylindrical or cylindrical tube-like base member that can be placed into a cartridge and moved along the cylindrical longitudinal axis inside a cartridge, wherein at least one sealing lip (12) is provided that seals against a sealing surface running parallel to or at an acute angle with respect to the cylindrical longitudinal axis, wherein the sealing lip is arranged such that by way of a tool that can be accessed from an end side of the piston, the sealing lip can be lifted off the sealing surface when the cartridge is closed by the piston so that air can escape from the cartridge.

Abstract: A fire extinction device comprises a reservoir (2) of extinguishing agent and means for generating a pressurized gas (30) such that the gas generated (16) may enter the reservoir (2) when the extinguishing agent (4) is to be ejected onto a fire zone. The device of the invention comprises furthermore a refractory separating element (40) between the extinguishing agent (4) and the pressurizing gas generated (16), in order to avoid heat exchanges between them and to optimise the ejection of the extinguishing agent (4).

Abstract: The present invention relates to a multi-chamber container having a container housing (4), which comprises a first chamber (1) for receiving a first product component and a second chamber (2) for receiving a second product component. The container further has a device (15, 16; 60, 61) for producing a pressure difference delivering the first and/or second product components out of the respective chamber, a removal opening (33), which communicates with the first chamber (1) and/or the second chamber (2) and is disposed on a housing head (3, 53), and further a metering device (3, 15, 16; 60, 61, 66) for dispensing the product component from the first and/or second chambers (1, 2). The object of the present invention is to provide a multi-chamber container, which has a relatively space-saving and compact design.

Abstract: A medical system comprising apparatus and methods for improved irrigation and lavage in wound management. The device attaches to at least one irrigation fluid source and is configured to administer the fluid indirectly to a wound or tissue.

Abstract: A container for containing and dispensing viscous comestibles, such as ice cream, is disclosed. The container includes a container body with a nozzle and a container cap movably coupled to the container body. The container cap moves between at least two positions, a first position where the container cap covers the nozzle, and a second position where a portion of the nozzle extends through a container cap opening. In some embodiments a straw portion of the nozzle extends through the container cap opening. A method of containing viscous comestibles is disclosed which includes attaching a container cap to a container body such that the container cap has at least two positions, testing that the container cap moves to each of its at least two positions, inserting viscous comestibles into the container body through a nozzle opening in the container body nozzle, and locking the container cap in the first position.

Abstract: The invention relates to a container, particularly in syringe form, for an at least substantially separate storage and release of substances, in particular for storage and release in outer space, with an outflow opening, a storage chamber for the storage of the substances, with at least one slideable separator element which divides the storage chamber into sub-chambers, and with at least one shaped overflow channel which is provided for transporting substances from a sub-chamber into a sub-chamber which is arranged forward as seen in the direction of the outflow opening, and/or into the outflow opening. It is proposed that the overflow channel and the separator element are designed for an at least substantially sequential release of substances and/or for washing-out a stored solid by a liquid.

Abstract: The invention pertains to a cartridge (1) with at least one chamber (6a, 6b) for accommodating a substance that respectively features a dispensing opening (11a, 11b) and another opening that is closed by a piston (8a, 8b) that can be displaced in the chamber and serves for dispensing the substance. The cartridge (1) furthermore features a piston rod mechanism (4) for displacing the piston (8a, 8b) in the chamber (6a, 6b). In this case, the piston rod mechanism is composed of several piston rods (14, 14a, 14b, 15, 15?) that can be transferred from a first dispensing stage to a second dispensing stage with the aid of a spring element (18, 18a, 18b).

Abstract: A dispenser for viscous condiments including a tubular sidewall having opposite ends. One opposite end is open and can receive a plunger or piston therein for applying force to a condiment contained within the tubular sidewall. The other end of the sidewall includes a dispenser valve assembly including a member secured to an inturned flange portion of the sidewall with the flange portion being generally normal to the sidewall. The dispenser valve assembly is suitably secured to the flange portion as by heat sealing, such as a bead of hot melt, to form a composite laminated structure that is resistant to the penetration of liquid elements of the condiments. The dispenser valve assembly further includes a valve plate having one or more selectively openable discharge openings that will open and close under the influence of the pressure applied to the condiment in order to discharge the condiment.

Abstract: An electric caulking gun has a body and an actuating assembly. The body has a pushing shaft, a motor, a gearbox, a transmission device, a circuit board and a switch. The gearbox has a sun gear with multiple mounting slots. The actuating assembly is mounted in the body, is connected to the switch and engages the sun gear and has a connecting arm, a linking arm, an actuating element, an oscillating arm and a pressing button. The connecting arm is pivotally connected to the switch. The linking arm is connected to the connecting arm. The actuating element is mounted in the body, selectively engages one of the mounting slots and has a wedge mount and an engaging block. The oscillating arm is connected to the body and is connected to the connecting arm. The pressing button is movably mounted in the body and is connected to the oscillating arm.

Abstract: A multicomponent cartridge includes a first storage chamber for a first component and a second storage chamber for a second component. The first storage chamber is separate from, and arranged next to, the second storage chamber. A first piston is movably received in the first storage chamber. A second piston is movably received in the second storage chamber. Each of the first or second storage chambers has a respective filling end and a respective discharge end. The storage chambers are connected to one another at at least the discharge end. The storage chambers have inner walls with the discharge end opening into a discharge element in an opening aperture. A venting element is upstream of the corresponding opening aperture at at least one of the inner walls, with the venting element extending over a maximum of one third of a longitudinal dimension of the storage chamber.

Abstract: Device for dosing dyes in solution or dispersion for the preparation of dye baths for textile materials, comprising a plurality of pipettes (1) individually connected to corresponding bottles or containers (6) containing the said dyes, the said bottles or containers being respectively connected to a dosing head (8) through corresponding ducts (9) from which the dyes exit. The device comprises programmable means (EU) which individually control the said pipettes (1) and respective electrovalves (4) and which, depending on the formulation programmed to realize a dye bath, operate the automatic subdivision or selection of the electrovalves (4) in two groups.

Abstract: A material transfer system for storing, transferring and dispensing viscous material, such as fluids and liquids, includes a material containment vessel with an upper region incorporating a motive force and a bottom region with a material ingress and egress opening. A diconical or other shaped force transfer device is located in the material containment area. The force transfer device is an energy transducer when the material containment is filled with highly viscous materials, such as adhesives, sealants, mastics or lubricating greases. The force transfer device serves as an integral part of a level indicator for both viscous fluids and lower viscosity liquids. The viscous material itself forms a seal between the interface region of the force transfer device and the inside wall of the fluid vessel. Vertical stabilizing elements may extend outward from the force transfer device.

Abstract: A container, for example for a food product or the like, provides an elevating lower inner surface that may sealably support a contained food product to raise the upper surface of the food product as it is consumed. Importantly, the container avoids an extension of the elevating mechanism into the product itself, reducing problems of contamination and leakage.

Abstract: A light up projection device with a housing and an actuator. The housing has a cavity reservoir for storing a liquid, a front end with an aperture, and a rear end with an opening. The actuator has a handle portion and a plunger portion extending therefrom. The plunger portion encloses the opening of the rear end of the cavity reservoir and interacts with the cavity reservoir to vary the volume of the cavity reservoir. A light source disposed within the actuator illuminates the actuator, the cavity reservoir and/or the liquid being projected from the device. The light source is off when the handle portion abuts the housing. The light source is on when the handle portion is pulled away from the housing, such as when liquid is being drawn into the cavity reservoir or when liquid is being projected from the cavity reservoir through the aperture.

Abstract: The invention relates to a radial sliding seal component, particularly for use in metering devices, such as syringes and pipetting piston-cylinder arrangements, comprising a sealing component working together with at least one pretensioning component , wherein the sealing component comprises a sealing segment extending in the axial direction and in the circumferential direction, on which a sealing surface facing in a first radial direction for sealing and sliding contact in at least the axial direction is formed on a working surface extending in the axial direction and in the circumferential direction, and on which a pretensioning surface extending in a second radial direction opposite to the first is formed for engaging with the pretensioning component for transferring the radial pretensioning force, wherein the pretensioning component comprises a spring carrier and a plurality of separately formed radial spring segments compliantly supported at least in the radial direction on the spring carrier.

Abstract: A two component adhesive system is described. The first component of the system is made from a sulfonated lignin having at least one amine group containing side arm and at least one hydroxyl group containing side arm. The second component of the system is made from a sulfonated lignin having at least one chloroformate group containing side arm.

Abstract: An apparatus of multiple embodiments for potency preservation of consumer beverages is herein disclosed. Multiple embodiments presume several objective techniques for improved maintenance of a perishable product. A rigid and semi-rigid beverage container, a container cap and lever, a tubular and non-tubular spindle, and coordinated means for torque comprise concerted cause for both preservation of freshness of beverages and for capability of causing a given volume of such beverages to conveniently flow from their containers and for the containers to then efficiently preserve potency of remaining volumes of such beverages. The spindle is the integral connection to a ratcheting and lever device, providing necessary torque, and is further connected to a substratum at base of container; such substratum serving to elevate a volume of beverage to container cap and its spout for egress. Alternative embodiments vary by method of air intake, spindle features, and conduction method for flow of beverage.

Abstract: For a cost-effective design of a metering dispenser for dispensing a substance (12), which is poured into a container (1) that is open at an end face and which can be removed from the container (1) by means of a pump unit (10), wherein a piston (5) is inserted in the container (1), the piston (5) has smaller dimensions than the inner contour of the container (1) and a film (5a) of the pasty substance (12) is provided in order to seal between the piston (5) and the inner contour of the container (1).

Abstract: A powered dispensing tool includes a housing, a motor, a rack operably coupled to the motor for powered translation along a longitudinal axis in at least one of a forward direction and a reverse direction, a transmission housing at least partially positioned within the housing through which the rack is extendable, first and second plungers, at least one of which is coupled to one end of the rack, and a first cartridge housing within which first and second material cartridges may be supported in a side-by-side relationship. The first and second plungers are associated with the first and second material cartridges, respectively. The tool also includes a second cartridge housing within which only a single material cartridge may be supported. The first and second cartridge housings are interchangeably coupled to the transmission housing to adapt the tool for use with dual material cartridges or single material cartridges.

Abstract: In one embodiment, a dispensing device includes a receptacle for containing and dispensing the flowable material, such as caulk. The dispensing device also includes a drive member which moves a piston within the receptacle for dispensing the flowable material from the device. A handle is arranged to be gripped by an operator and includes a clamp member disposed over the receptacle which is arranged to move from an open position whereby the handle is moveable to any desired position along the receptacle, to a closed position for engaging the handle to the receptacle. A user input is provided on the moveable handle and adapted to be depressed by a user for operation of the device.

Abstract: The invention relates to a novel electrolytic process for removing impurities from the inner surface of a metallic container. The process is particularly useful for cleaning process reactors used for culturing microorganisms, and storage tanks used for storing metabolites formed in the process reactor, as well as containers for dairy products.

Abstract: This invention provides a deformable dispensing tube (1) with an internal device (8). The device is contained within the deformable dispensing tube but is a separate physical entity to the deformable dispensing tube and has the ability to move within the deformable dispensing tube. The object of the device is to aid the dispensing of part or all of the contents (16) of the deformable dispensing tube by the user.

Abstract: A container and method for storing a pharmaceutical agent are provided for enhancing the storage time. The storage time of the pharmaceutical agent is improved by reducing the loss of stabilizing agents in the pharmaceutical agent. The storage container is formed from a polyolefin that includes a stabilizing agent in an amount effective to reduce or inhibit the migration of stabilizing agents in the pharmaceutical agent. The polyolefin container is formed with a fatty acid amide such as erucamide for stabilizing insulin that contains m-cresol and/or phenol as stabilizing agents for the insulin. The fatty acid amide incorporated in the container inhibits and/or reduces the rate of migration of the m-cresol and/or phenol into the polyolefin to extend the storage life of the insulin. The container can be a syringe, such as a pre-filled syringe, a storage vial or the flow path of an infusion pump.

Abstract: An electrical caulking gun has a gun body and a clutching device. The clutching device has a clutching switch, a linking lever, a clutching block and a block spring. The clutching switch is mounted on the gun body and has a pressed segment and a pushing segment having an inclined pushing surface. The linking lever is pivotally mounted in the gun body and has an abutting end and a pushing end. The abutting end abuts with the pushing surface of the clutching switch. The clutching block has an inclined pushed surface and an engaging rod. The engaging rod detachably engages a transmission device of the caulking gun. The block spring provides a force to push the engaging rod on the clutching block to engage the transmission device.

Abstract: A syringe for holding fluids susceptible to void formation when frozen and thawed before use. The interior surface of the syringe sidewall may be roughened, which serves to prevent or significantly reduce the incidence of void formation in the fluid. The required level of surface roughening for counteracting void formation may be reduced by increasing the sidewall flexibility. Alternatively, the flexibility of the syringe sidewall may operate over certain thickness ranges to prevent or significantly reduce void formation in the fluid without intentionally roughening the interior surface.

Abstract: A concentrated flavor dispensing machine having displacement pumps for delivering between a fraction of a milliliter and a few ounces of fluids having a viscosity value between 1 to 4000 centepoise is described. The dispensing machine includes a cabinet for containing a multitude of displacement pumps, where each displacement pump is realizably connected to a disposable pre-filled fluid cartridge. Each displacement pump includes a stepper motor in engagement with a threaded drive rod that is advanced or retracted by any one of several predetermined distances. The drive rod impels a plunger positioned within the disposable cartridge to dispense a volume of fluid. Flexible capillary tubes connected to the output of each disposable cartridge direct the fluid to a central dispensing area. The disposable cartridge includes an expandable plunger which draws fluid back into the cartridge when the drive rod is withdrawn after a dispense operation for drip prevention.

Abstract: Provided are: surface modification method for imparting slidability to surface of elastic body such as vulcanized rubber or thermoplastic elastomer without using expensive self-lubricating resin; surface-modified elastic body with polymer brush formed on its surface; and gasket for injector and injector formed of surface-modified elastic body. The surface modification method applies to surface of thermoplastic elastomer or vulcanized rubber.

Abstract: An electric caulking gun has a body and an actuating assembly. The body has a pushing shaft, a motor, a gearbox, a transmission device, a circuit board and a switch. The gearbox has a sun gear with multiple mounting slots. The actuating assembly is mounted in the body, is connected to the switch and engages the sun gear and has a connecting arm, a linking arm, an actuating element, an oscillating arm and a pressing button. The connecting arm is pivotally connected to the switch. The linking arm is connected to the connecting arm. The actuating element is mounted in the body, selectively engages one of the mounting slots and has a wedge mount and an engaging block. The oscillating arm is connected to the body and is connected to the connecting arm. The pressing button is movably mounted in the body and is connected to the oscillating arm.

Abstract: A fluid dispenser comprising: a fluid reservoir (10) of variable working volume, in which reservoir the fluid is protected from the air, the reservoir being provided with an actuator wall (25) that is axially movable down and up between a rest position and a depressed position, the movement of the wall causing the pressure in the reservoir to vary, the wall being situated at an end of the dispenser; and a dispenser orifice (150) via which the fluid is dispensed, the orifice being provided with an outlet valve (4); the dispenser being characterized in that the orifice (150) is situated at an end of the dispenser other than the end at which the actuator wall (25) is situated.

Abstract: An inductor pump system comprises a pump system, a ram system and a bearing assembly. The pump system includes a platen configured to engage a container. The ram system comprises a cylinder configured to support the pump system, and a piston extendable from the cylinder to vary axial positioning of the platen with respect to the container. The bearing assembly links the piston to the cylinder and is configured to prevent rotation of the pump system with respect to the ram system.

Abstract: A system for dispensing sprayable material such as paint and other liquefied products. The system includes a dispenser designed to accept a flexible, crushable, container filled with sprayable material and having a valve and spray tip at one end. The container is placed into a slot in the dispenser with the valve on the container secured in the housing of the dispenser. In operation, a plunger that runs lengthwise within the housing of the dispenser exerts force on the bottom of the container crushing it as it is emptied and forcing the sprayable material out through the valve and spray tip.

Abstract: The present invention is related to a dispensing device. The dispensing device includes a container; a dispensing opening located at one end of the container; a plunger located inside the container; a push button associated with the plunger; and a drive mechanism configured to drive the plunger linearly inside the container from a first position towards the dispensing opening when the push button is pressed and to hold the plunger at a second position, wherein the second position is closer to the dispensing opening than the first position.

Abstract: A powered dispensing tool includes a housing, a motor, a rack operably coupled to the motor for powered translation along a longitudinal axis in at least one of a forward direction and a reverse direction, a transmission housing at least partially positioned within the housing through which the rack is extendable, first and second plungers, at least one of which is coupled to one end of the rack, and a first cartridge housing within which first and second material cartridges may be supported in a side-by-side relationship. The first and second plungers are associated with the first and second material cartridges, respectively. The tool also includes a second cartridge housing within which only a single material cartridge may be supported. The first and second cartridge housings are interchangeably coupled to the transmission housing to adapt the tool for use with dual material cartridges or single material cartridges.

Abstract: The dispensing assembly with a syringe comprising storage container configured to receive a powdery or granular material and a piston that is connected to a hollow ram. In order to supply a liquid to the powdery or granular material, both the hollow ram and the piston have through-going, sealable longitudinal bores. Due to the fact that the liquid is filled in from the inlet side, a complete de-aeration of the mixture can be ensured.

Abstract: The system for filling a cartridge employs a piston setting device that has a plunger for moving the venting valve of the piston to an open position and a conduit for venting the air from the opened valve under the influence of a vacuum source connected to the conduit via an attachment device.

Abstract: A volumetric doser (10) for batching liquid or pasty pharmaceutical substances is disclosed which comprises: a cylinder (1); a piston (2), mobile along internal walls (49) of the cylinder (1) for displacing liquid or pasty pharmaceutical substances; a stem (3) exiting from the cylinder (1) for moving the piston (2); and a coupling member (9) to which the stem (3) is fixable. The coupling member (9) has a substantially U-shaped form and comprises: a base (11) and two facing lateral walls (12, 13) which originate from the base (11). The piston (2) and the coupling member (9) are reciprocally conformed such that the coupling member (9) can embrace a part (17) of the piston (2) and can perform limited oscillations with respect to the piston (2) axis.

Abstract: A protective sleeve placed within the cylinder of a syringe, the sleeve protects a piston and a computer controlled device or human operator pushing the piston from material leaking past a piston assembly. The sleeve has lips or ridges at either end, one that is attached to the piston assembly at the output end of the syringe and a second lip that is attached with a retention plate at the far end of the syringe. The sleeve may have a bellows or accordion configuration that slides along the inner surface of the syringe cylinder without appreciably loading the drive mechanism.

Abstract: The apparatus of the present invention is a pet pantry having storage containers for pet-related equipment, accessories, medication, or other items, and also pet food storage and dispensing. The food dispensing mechanism allows for measured food dispensing, providing volume adjustment mechanisms to dispense a desired quantity of pet food. The food dispensing mechanism is a single movement handle or button dispensing the desired quantity of food. The pet pantry is also modular allowing for adjustments to a pet owner's specification.

Abstract: A valve operating mechanism for use in a fluid dispenser is described, wherein the fluid dispenser includes a reservoir for a fluid to be delivered, a fluid outlet for the reservoir, a piston configured to move through the reservoir, and an actuator for the piston, the valve operating mechanism including a valve, wherein the valve has an upstream side and a downstream side, and in at least one point of operation of the valve operating mechanism, the valve is inoperable as a consequence of the pressure difference between the upstream side of the valve and the downstream side of the valve.

Abstract: A cartridge piston for pressing out a compound from a cartridge body is provided with a forwardly directed, elastic sealing lip which is arranged to bear against the cartridge wall. To allow for escape of air while the piston is being introduced, air passages are provided on the sealing lip. In a wall portion of the side wall, the piston has a non-circular shape so that, in certain regions, the abutment of the piston on the cartridge wall is less close than in other regions. In this manner, the outflow of air to the outside is facilitated. Further, the piston is arranged in its inserted state in a sealing abutment on the cartridge wall, thus precluding ingress of air into the cartridge.

Abstract: A fluid dispenser comprising a fluid reservoir (1) and a dispenser member (2), the reservoir (1) comprising a slide cylinder (11) that is cylindrical, and a follower-piston (14) that includes at least one lip (16) that is in sliding contact with the cylinder (11), the slide cylinder (11) being provided with a bottom (12), an equalizing space (E) being formed between the follower-piston (14) and the bottom (12), this space (E) communicating with the outside so as to keep the space (E) at atmospheric pressure, such that, each time fluid is dispensed, outside air penetrates into the space (E), which increases as the follower-piston (14) moves away from the bottom (12); the dispenser being characterized in that a bacterial filter (F1) filters outside air coming into contact with the lip (16) of the follower-piston (11) through the equalizing space (E).

Abstract: A piston wiper plate for a pressing unit for melting systems for bags includes a single-piece wiper plate having an axial upper side and an axial bottom side made of elastically resilient material, and a radially outer wiper edge that surrounds the periphery in the relaxed state. The sealing and sliding properties thereof remain within a predetermined range even when the temperatures fluctuate more drastically in that in the wiper plate includes at least one recess that is inserted in the axial upper side and/or in the axial bottom side and/or between the axial upper and bottom sides thereof and that allows for at least a radial compression of the wiper plate. At least one expandable restoring element can be inserted into the recess.

Abstract: An aspiration apparatus includes handles with two members. Each of the handle members includes a proximal actuation end and an opposite distal connection end. The members of the handles are associated with one another (e.g., pivotally, etc.) in such a way that movement of the proximal actuation ends in first directions (e.g., toward one another, away from one another) causes the distal connection ends to move in opposite second directions (e.g., away from one another, toward one another). The distal connection end of the first member may configured for association with the barrel of a syringe, while the distal connection end of the second member may be configured for association with the plunger of the syringe. Association of one or both of the distal connection ends with its respective syringe element may be pivotal. Aspiration methods, including, but not limited to, methods of using such an aspiration apparatus, are also disclosed.

Abstract: [Problems] To provide an ejection container capable of falling a liquid in drops from the container body without relying on the sense of the fingertips and without affected by a change in the temperature. [Means for Solution] A knock-type ejection container 1 in which an ejection port 8 is provided at one end of a container body 2, a knock button 4 is provided at the other end thereof, a container chamber 22 is provided in the container body 2 to contain a liquid, and the liquid contained in the container chamber 22 is ejected from the ejection port 8 being interlocked to the operation of the knock button 4.

Abstract: A device and method for mixing and applying biomaterials comprising a plunger having a plunger body and a dispensing surface, wherein the plunger body is displaceable within a syringe barrel, a shaft within the plunger body having a first end and a second end, wherein the shaft is positioned to extend through and from the plunger body, a mixing surface attached to the first end of the shaft, and a locking device that enables the mixing surface to alternate between an extended position and a retracted position, wherein the mixing surface projects from the dispensing surface in the extended position to promote mixing of the substance, and wherein the mixing surface is retracted through the dispensing surface into the plunger body in the retracted position such the dispensing surface may act on and dispense the substance.

Abstract: A syringe has a dripless feature by using an O-ring located between a conical disc and a flat plunger disc in an annular groove on a moving plunger. The flat plunger disc has a series of projections that offset the o-ring off the flat plunger disc surface when the plunger is not actuated. When the plunger is actuated, the o-ring distorts to rest on the projections and also on the surface of the flat plunger disc. When the plunger is released, the o-ring's resiliency pulls the o-ring back to its original shape which sucks back the fluid being dispensed so that no or less drips occur.