Abstract: A system and method that portably stores, refrigerates, and dispenses a viscous, semi-solid food product. Cannoli cream is held in an open-top hopper with a lower outlet tube that is removably received inside an insulated and cooled portion of the dispenser housing through a door with an opening for the lower outlet tube. A horizontal dispensing nozzle is attached to the lower outlet tube from outside the door. The hopper is positioned under a piston assembly that moves a piston plate through the top of the hopper with a screw-jack. The piston assembly functions to pump cannoli cream from the hopper through the dispenser nozzle.

Abstract: A rotary-linear system is configured to operate an associated tool. The system includes a rotary-linear actuator having first and second portions that can move linearly and/or rotationally relative to each other, such as about a central axis extending through the actuator. An elongated drive rod extends axially through at least a portion of the actuator, which is operative to rotate about a longitudinal axis thereof generally independently of the actuator. While the rotation of the drive rod can be independent of movement of the actuator, such rotation can be controlled based on the position and/or movement of the actuator. An end of the drive rod near a distal end of the actuator is operative to actuate an associated tool, such as can be mounted at a distal end of the actuator.

Abstract: The allspicer is an automatic spice dispenser that holds, stores and dispenses spice's. It has a Menu memory, a alphabetical listing of spice's, measurement screen as to how much of Each spice you wish to drop out. The spice's would drop out just like a coffee machine that You put money in and a predetermined amount pours into your cup. The spice would drop out The amount you choose and drop it out into a dispense cup.

Abstract: The invention relates to a microdispenser (1) for dispensing a liquid sample in a dispensing device, with a sample container (2) for receiving the liquid sample, and with a nozzle (7) for dispensing the sample located in the sample container (2). The microdispenser (1) with the filled sample container (2) can in this case be stored independently of and fluidically separately from the dispensing device, without the sample escaping from the sample container (2) during storage.

Abstract: A concentrate/extract cartridge for dispensing a liquid concentrate/extract is provided. The cartridge includes a hollow body and a dispensing tube that contains a pumping device. The cartridge includes a valve having a valve stem that passes through a port of a valve seat connected to the dispensing tube. A piston is located at a first end of the valve stem and a valve body is located at a second end of the valve stem in removable contact with the valve seat for alternately opening and closing the port. The piston can also includes a membrane positioned on a side facing the valve stem configured to permit a flow of fluid into the dispensing tube when the valve body is in contact with the valve seat and to permit the fluid to be forcibly expressed from the dispensing tube when the valve body is moved from its contact position. A liquid dispenser suitable for numerous applications, having a removably insertable concentrate/extract cartridge and a method of dispensing a liquid are also provided.

Abstract: A liquid dispenser is mounted on a container and has a shell, a spout assembly, an injection assembly, a power pack and an activating assembly. The shell is mounted on the container and has an injection tube. The spout assembly is formed on and protrudes from the shell. The injection assembly is mounted in the shell pumps air into the injection tube to force liquid from the spout assembly. The activating assembly selectively activates the injection assembly and selectively seals or opens an air passage to the injection tube.

Abstract: An electric caulking gun has a body, a gearbox, a caulking barrel, a pushing device, a driving assembly, an actuating assembly, a motor and a power source. The body has a mounting section and a handle section. The gearbox is mounted in the body and has a seat and a mounting sheath. The caulking barrel is connected to the gearbox. The pushing device is connected movably to the gearbox and has a rack, a linking sheet, two pushing shafts and a pushing disc. The driving assembly is mounted in the gearbox. The actuating assembly is mounted between the gearbox and the body. The motor is mounted in the body between the mounting section and the mounting sheath of the gearbox. The power source is connected detachable to the handle section of the body.

Abstract: A powdered seed treatment applicator for evenly applying a powdered seed treatment to seeds to be dispensed and planted by a planting machine includes a container, a shaft, and a motor for rotating said shaft in the container. A dispensing element having a plurality of openings is positioned at a bottom of the container. Dispensing bristles are coupled to the shaft and contact the openings as the shaft rotates to urge powdered seed treatment out of the container through the openings while preventing clogging of the openings. Augers and paddles are utilized to provide agitation of the seed treatment, prevent clumping, and facilitate efficient dispensing of the powdered seed treatment within the container. An adjustable dispensing portion is also provided.

Abstract: The actuating device for a sprayer contains a control circuit to provide scheduled operations, a driving member to provide a torque, a power member to provide electricity to the control circuit and the driving member, an actuating member to exert pressure to the nozzle of the sprayer, a gear set to deliver the torque to the actuating member, and a casing member to house the foregoing components. The actuating member has a roughly quadrant shape with gear teeth on the arc and a peen besides the gear teeth. An adaptation member can be provided on top of the nozzle. The adaptation member has a socket to fit on the nozzle and a diametric elongated ridge interacting with the peen to provide closer and longer period of interaction to avoid insufficient exertion of pressure to the nozzle.

Abstract: A dispenser adapted to be coupled to a fluid container. The dispenser comprises a dispensing head, an energy source, and a fluid pathway. The dispensing head includes a fluid pump, a motor adapted to power the pump, a trigger adapted to control the motor, and a nozzle orifice in fluid communication with a discharge end of the pump. The fluid pathway has one portion in fluid communication with an intake end of the pump and another portion inside the container. In one embodiment, the fluid pump is a peristaltic pump. The present invention may further include a valve having a membrane for controlling flow through the valve, the membrane having open and closed positions; and an element urges the membrane to the closed position, and a vacuum pressure at one end of the valve may overcome the urging of the element, thereby moving the membrane to the open position.

Abstract: A household liquid dispenser has a spout fitment with discontinuous beads or screw threads which define axial channels to interface with a pump inlet in a lock and key arrangement so as to maintain consistent quality of liquids dispensed by preventing the substitution of product refills of uncertain quality. Refills may be readily manufactured and at low cost. Mechanical and motorized dispensers may be used with the inventive spout fitment.

Abstract: A topping dispenser for dispensing portions of chilled topping onto beverages and desserts comprises a housing having a drawer that includes a product compartment and an adjacent drive compartment separated by a partition. The product compartment is adapted to receive a bag containing topping, and houses a vertically displaceable pressure member, such as a roller, to roll down along one side of the bag opposite a pressure surface on the other side of the bag to squeeze contents of the bag out through a bottom dispensing valve assembly to direct product into a waiting container. The roller is advanced downward in predetermined increments by a motor-driven carriage assembly in the drive compartment that may be actuated by a push button on the housing. The dispensing valve assembly holds a pressure-actuated valve that closes automatically to cleanly cut off a dispensed ribbon of topping and is configured to impart a decorative appearance to the dispensed ribbon.

Abstract: The present invention relates to a method of mixing and dispensing viscous materials, comprising the steps of: inserting a cartridge containing one or more viscous materials in a chamber; activating a first motor (1) to move a plunger from a first position to a second position within the cartridge and activating a second motor (2) to move the plunger from the second position further within the cartridge to dispense the material.

Abstract: An automatic machine for dosing water and dental alginate is disclosed. The machine comprises a pressurized water container and a dental alginate container. In the automatic machine, a predetermined amount of each of those substances is transported from its respective container to a dosing point. During operation of the automatic machine, dental alginate is moved inside the alginate container with the purpose of bringing down residues of alginate adhered to the internal walls of the alginate container. In addition, the automatic machine comprises a control unit with a memory that stores dosing programs, this memory may be programmed in order to handle dental alginate of different manufactures.

Abstract: Disclosed in this specification is a container and a dispensing mechanism for dispensing various materials into an apparatus such as a laundry machine. The container comprises a dispensing cap that has a static portion and a rotating portion. A relative rotation between the static and rotating portions can be created once the dispensing cap is inserted into a hopper of the dispensing mechanism. This relative rotation discharges the material inside the container into the hopper that in turn discharges the material into a conveyor. The conveyor feeds the material into the apparatus.

Abstract: An electrically-powered fluid sprayer employs a piezoelectric fluid pump that includes an inlet port, an outlet port, a pump chamber, and a piezoelectric element that is deformed and displaced by electrical signals supplied thereto to vary the volume of the pump chamber. Such displacement pumps fluid into the inlet port and into the pump chamber and discharges fluid from the pump chamber out the outlet port. The inlet port is in fluid communication with a fluid reservoir. Spin mechanics may be disposed downstream from the outlet port of the fluid pump and upstream from the discharge nozzle. The piezoelectric fluid sprayer may be extended to include a dual chamber piezoelectric pump that pumps different fluids (e.g., a liquid and air). The output of the dual chamber pump is mixed in a manifold and supplied downstream to the discharge nozzle. Spin mechanics may be employed in the fluid stream upstream from the discharge nozzle after the mixing.

Abstract: The invention relates to a device for processing an edible product in the form a viscous to pasty mass (1), especially an edible product based on a fat mass, such as chocolate, or based on water, such as ice cream. Said device comprises a dosing unit (2) for the dosed delivery of a specific volume of the mass (1) to shaping units (13). The movement of the displacement element (6) determining the dosage volume is performed via servo drive (9) while an inlet (4) and an outlet (5) are closed and opened via servo drive or pneumatic drive, respectively. Preferably, the displacement element is embodied as a combined lifting/rotating plunger (6) which can perform a linear movement for a suctioning lift and a dosing lift while being able to perform a rotary movement for opening and closing the inlet (4) and the outlet (5), i.e. a valve function.

Abstract: The present invention is directed to metering devices, systems, and methods that mitigate differential thermal expansion/contraction for the efficient, accurate, and reproducible metered delivery of fluids. The present invention allows the net fluid volume and a plunger location within a fluid dispensing container to automatically adjust under the influence of differential thermal expansion/contraction between the fluid and the fluid dispensing container that the fluid is contained within. Further, the present invention allows the metering system drive to sense the adjusted plunger location and allows the metering system drive to re-zero itself to produce an accurate volumetric delivery of fluid from the fluid dispensing container. The metering system includes means for controlling the travel of the metering system drive, and hence the travel of the plunger into the fluid dispensing container, for delivering accurate/precise amounts of the fluid from the fluid dispensing container.

Abstract: A dosage-dispensing device has a drive unit and a receiver for a dosage-dispensing unit. The drive unit has a drive shaft. The dosage-dispensing unit has a delivery orifice with a closure element that is disposed in the delivery orifice. The closure element is coupled to the drive shaft when the device is in an operating state. The closure element provides the delivery orifice with an aperture cross-section that varies between a closed position and a maximally open position. To couple the drive shaft to the closure element and to open the delivery orifice, the drive unit linearly advances towards the dosage-dispensing unit. A closure spring holds the closure element in a closed position up to the point of complete coupling. To prevent premature opening of the delivery orifice during the coupling process, the drive shaft has limited linear mobility in a direction away from the dosage-dispensing unit.

Abstract: The present invention relates to an apparatus and method for delivering or dispensing substances. The delivery apparatus comprises a housing, a cartridge for containing the fluid or liquid to be delivered, a conduit system, a nozzle, a pump and an actuating mechanism for actuating a stream of fluid or liquid. The delivery apparatus may include a motor and power source adapted to power the pump. The cartridge containing the fluid or liquid is typically an off-the-shelf container that may be purchased in stores, such as insecticides or household cleaners. The conduit system has an intake opening in fluid communication with the fluid inside the container and another portion in fluid communication with the intake of the nozzle. The conduit system further includes a structure for causing the stream of fluid or liquid to be generally laminar.

Abstract: An automatic machine for dosing water and dental alginate is disclosed. The machine comprises a water container and a dental alginate container. In the automatic machine, a predetermined amount of each of those substances is transported from its respective container to a dosing point. During operation of the automatic machine, dental alginate is moved inside the alginate container with the purpose of homogenously distribute the alginate and bringing down residues of alginate adhered to the internal walls of the alginate container. In addition, the automatic machine comprises a control unit with a memory that stores dosing programs, this memory can be programmed in order to handle dental alginate supplied by different manufactures.

Abstract: A substance dispersing apparatus having a cartridge used to deliver substances for the cosmetic, medical, dental, automotive, construction, and other industries.

Abstract: A self-contained foam dispensing device includes a casing, a mixing chamber, a port adapted to receive one or more containers including a plurality of chemicals in a plurality of compartments and a flow generator adapted to induce flow of chemicals from the compartments toward a mixing chamber, the flow generator being located between the mixing chamber and the port. When the one or more containers are in the port the one or more containers move with movement of the casing.

Abstract: A plug and play system of fluid dispensing and auxiliary modules that use motors with integrated drivers, controllers and the capability of using an internal or external encoder where any one of several modules can be substituted into a base dispensing unit. In the case of positive displacement piston drives, a first motor can be used for the rotary valve operations and a second motor used to position the pump piston. The piston can be very accurately positioned by the second motor that can use an external linear coding system electrically coupled to the motor controller. The invention allows coordination between the two motors of a positive displacement piston system, as well as being able to work with several pump systems linked together in a liquid filling application or other application. The use of a motor system with a common user interface for different types of pump drives allows for “plug and play” capability for liquid filling and other applications.

Abstract: The invention describes a dispenser (1) for automatically dispensing semi-fluid media, in particular toothpaste, from a tube with a mouthpiece, comprising a housing (2) with an orifice (3) and having at least one portion measuring unit (4) for the tube in the interior, a switch (6), a motor (20), a drive mechanism (5) and a control unit (7), whereby a brush is positioned in the orifice (3) in order to charge it with semi-fluid medium. In order to transport the brush automatically from the orifice (3) in the direction of the mouthpiece of the tube, at least one drive mechanism (5) is provided on a positioning mechanism (8), in particular a gear (33) with at least one driver (34).

Abstract: A method and apparatus to automatically reverse the motor of a power tool, such as a dispensing gun or similar tool. In some constructions, a controller automatically reverses the direction of plunger movement and removes the plunger from contact with the back wall of a cartridge. The controller has a trigger switch that is coupled to a power source, such as a battery, and includes a main power on/off switch and a potentiometer. A protection or secondary switch is coupled in parallel to the main power on/off switch. A power supply circuit and a commutator are each coupled to the main and secondary switches. An overload sensor is coupled to the commutator. The controller includes a programmable device that is coupled to the power supply circuit, the potentiometer, the commutator, and the overload sensor.

Abstract: A container of liquid color material has a diaphragm liquid color pump located therewithin for providing liquid color from the container and non-drip apparatus for releaseably connecting the container with a blender for supply of liquid color thereto and methods for pumping and supplying liquid color incorporating the same.

Abstract: Handheld extruder welding device for welding thermoplastic synthetic materials, including an extrusion screw with an attachment shaft and a device for the axial attachment of the extrusion screw with the attachment shaft to a gear-equipped drive system; where a one-piece gear housing for holding the gear is equipped with a front-side bearing flange for accepting the extrusion screw; where an output shaft arranged in the bearing flange has an output gear attached to it at the cup-side end and has an opening for inserting the attachment shaft; where a two-part annular clamping flange for clamping the extrusion screw in the bearing flange is provided; and where the clamping flange can be placed on the bearing flange from outside and can be clamped. In addition, the clamping flange may contain at least one feed channel for the welding wire. This design offers a compact, stable, and short gear output where the extrusion screw can be exchanged easily.

Abstract: An electric soap dispenser that includes sensors for detecting the presence of an object. The dispenser can be configured to dispense an amount of liquid soap, for example, upon detecting the presence of an object. The dispenser can include various features for enhancing the performance thereof For example, the dispenser can include an additional button for manual operation of the pump. Additionally, the dispenser can detect the voltage of a power supply and compensate for a drop in voltage of the power supply so as to produce more uniform dispensations of the liquid product. Additionally, the dispenser can include a valve at its discharge end to prevent drips.

Abstract: An electric soap dispenser that includes sensors for detecting the presence of an object. The dispenser can be configured to dispense an amount of liquid soap, for example, upon detecting the presence of an object. The dispenser can include various features for enhancing the performance thereof. For example, the dispenser can include an additional button for manual operation of the pump. Additionally, the dispenser can detect the voltage of a power supply and compensate for a drop in voltage of the power supply so as to produce more uniform dispensations of the liquid product.

Abstract: An electric soap dispenser that includes sensors for detecting the presence of an object. The dispenser can be configured to dispense an amount of liquid soap, for example, upon detecting the presence of an object. The dispenser can include various features for enhancing the performance thereof. For example, the dispenser can include an additional button for manual operation of the pump. Additionally, the dispenser can detect the voltage of a power supply and compensate for a drop in voltage of the power supply so as to produce more uniform dispensations of the liquid product.

Abstract: A system for withdrawing water, comprising at least one withdrawal passage through which water will be withdrawn, an apparatus that is fitted to one end of the withdrawal passage to aid the user in withdrawing water from a container, means such as a pump with a reversible motor is connected to the opposite end of the withdrawal passage for generating pressure differential to withdraw water through said withdrawal passage, and a drain passage that connects to the withdrawal passage to lead the withdrawn water to a drain.

Abstract: A fluid pump for a fuel dispensing unit comprises a pump housing with a first chamber and a second chamber, each chamber having a fluid inlet valve and a fluid outlet valve, respectively. The chambers are separated by a movable piston arranged to repeatedly decrease and increase the volumes of the chambers. The piston comprises a magnetic device, and electromagnetic control means are configured to move the piston by altering a magnetic field, for repeatedly decreasing and increasing the volume of the chambers.

Abstract: Provided is an ice dispenser. The ice dispenser dispenses ice pieces have various sizes such as chunks, fragments, and shavings to users, and the size of ice pieces discharged from the ice dispenser can be conveniently adjusted. The ice dispenser includes a rotatable first roller, a rotatable second roller disposed close to the first roller, and a distance adjustor. The distance adjustor is configured to adjust a distance between the first and second rollers for adjusting sizes of ice crushed between the first and second rollers.

Abstract: A dispensing device (11) for dispensing one-component or multi-component masses contained in vessels has a piston rod (21), a forward feed mechanism (31) which has a first clamping lever (32) and a second clamping lever (42) each of which is arranged on the piston rod (21) so as to be axially displaceable and swivelable in longitudinal direction (L) of the dispensing device (11), at least two spring elements (33, 43) acting upon the clamping levers (32, 42), and forward feed means for actuating the first clamping lever (32) and the second clamping lever (42) and including a first forward-feed element (34) cooperating with the first clamping lever (32) and a second forward-feed element (34) cooperating with the second clamping lever (42).

Abstract: A fluid discharge pumping apparatus includes: a drive mechanism; a cylinder; an outflow valve mechanism and an inflow valve mechanism coupled to the cylinder; a piston member inside the cylinder; and a piston-supporting member attached to the piston member driven by the drive mechanism to move the piston member. The inflow valve mechanism opens when the interior of the cylinder is depressurized, whereas the outflow valve mechanism opens when the interior of the cylinder is pressurized.

Abstract: A liquid dispensing system comprises a cartridge (2) in which liquid to be dispensed is retained and at least one solenoid assembly. The solenoid assembly comprises a coil (15) and an armature (3), the armature (3) being movably mounted within the cartridge (2) and the coil (15) being separate from the cartridge (2). Movement of the armature (3) acts to expel liquid from the cartridge (2).

Abstract: A time-pressure system for dosing liquid, comprising: a tank of liquids which communicates with at least one discharge conduit; organs for regulating the pressure of the liquids at a predetermined level; a choke unit, acting on a section of the discharge conduit in order to obstruct/allow passage of the pressurised liquids coming from the tank, thus determining projection of dosed quantities of liquids externally at predetermined time intervals. In particular, the choke unit comprises a brushless motor, which cyclically moves an obstructing element between a choked position and a disengaged position of the section.

Abstract: The present invention is a dispenser adapted to be coupled to a fluid container. The dispenser comprises a dispensing head, an energy source, and a fluid pathway. The dispensing head includes a fluid pump, a motor adapted to power the pump, a trigger adapted to control the motor, and a nozzle orifice in fluid communication with a discharge end of the pump. The fluid pathway has one portion in fluid communication with an intake end of the pump and another portion inside the container.

Abstract: A dispenser for fluid material that facilitates spreading of the fluid material is disclosed. The dispenser can comprise a unitary construction, or can be composed of a plurality of components that can be fastened together. Disposable cartridges containing fluid material can be attached to the dispense, and the material within can be dispensed and spread on a surface. The dispense provides metered dispensing.

Abstract: A dispensing device (1) for a dispensing machine to supply liquid food products that have a high degree of viscosity such as dairy products in which the product is stored in a container that has an outlet tube in order to be connected to the dispensing device (1), that is fitted with geared motor (3) on the inside from which a motor shaft (4) protrudes and which is fitted to a rotating roller (5) that has a multitude of “idler roller” (6) separated from each other but connected to said roller (5), and a space between the “idler roller” and the external body (2) having been provided, in such a way that the outlet pipe (13) passes through the space between the “idler roller” and the external body (2), in such a way that in its working position the roller (5) turns supplying the product by means of impulses, whilst in its rest position the outlet tube (13) is held tightly by applying pressure of the idler rollers (6) against it.

Abstract: A dispensing system for spreadable foodstuffs and spreadable non-food substances allowing for dispensing of metered amounts of product and spreading without the need for additional utensils not part of the packaging is disclosed. The system is composed of a disposable container containing a spreadable food stuff or non-food substance. The container comprises a mechanism for dispensing said foodstuff or non-food substances while proportionally decreasing the volume of the container. An alternative embodiment discloses a disposable dispenser allowing for spreading foodstuffs or non-food substances without any additional utensils in an ultra-portable unit without mechanical components.

Abstract: An assembly for processing wood chips with a novel blade profile allows wood chips to be packed great density. The profile may be a stepped profile with a plurality sections forming a rotationally forward face. Neighboring sections are non-collinear and at least one of the sections is parallel to a rotational axis. The profile may include a generally centrally disposed first section of ?¼ of a relevant dimension; a third section of ?? of the relevant dimension; a second section disposed between the first section and a third section and non-collinear with the third section; with the sections disposed relative to the rotational axis in advantageous positions. The profile may be such that second and third sections of the blade have approximately equal longitudinal extents, but the tilt-angle-weighted surface area of the second section is substantially less than the third tilt-angle-weighted surface area of the third section.

Abstract: A dispenser for spreadable foodstuffs or spreadable non-food substances allowing for at least two foodstuffs or non-food substances to be stored separately and individual dispensed. Dispenser also allows for foodstuffs or non-food substances to be spread in a knife-like manner without the use of any additional utensils that are not part of the packaging. Dispenser is easily refilled with replaceable cartridges and designed to keep contents away from air as contents are dispensed.

Abstract: A dispenser for spreadable foodstuffs or spreadable non-food substances allowing for dispensing of metered amounts of foodstuffs or non-food substances and spreading without the need for additional utensils that are not part of the packaging is disclosed. Dispenser is easily refilled with replaceable cartridges and designed to keep contents away from air as contents are dispensed.

Abstract: A dispenser for spreadable foodstuffs or spreadable non-food substances allowing for spreading without the need for additional utensils that are not part of the packaging is disclosed. Dispenser is easily refilled with replaceable cartridges and designed to keep food away from air as contents are dispensed.

Abstract: A dispensing system for spreadable foodstuffs and spreadable non-food substances allowing for dispensing of metered amounts of foodstuffs or non-food substances and spreading without the need for additional utensils not part of the packaging is disclosed. The system is composed of a disposable cartridge containing a spreadable product and a reusable dispenser that acts to dispense product from the disposable cartridge. The dispenser may rapidly switch between different disposable cartridges.

Abstract: Handheld extruder welding device for welding thermoplastic synthetic materials, including an extruder screw, a drive system for the extruder screw in an axial extension of the extruder screw, and a hot air unit with a blower, where the blower and the drive system are integrated in a housing including several parts, and where a cooling body with air inlets is located on the housing on the screw side. This cooling body transfers the axial and radial forces between the drive system and the screw cylinder and supports the housing. In this handheld extruder welding device, all drive components are integrated in one housing which makes it suitable for robust use and a long service life. Its design with a cooling body as the support base for the entire device represents a special function.

Abstract: A system for administering flowable products, has a product storage container, supply means for feeding the product from the container and into a feeding channel and for applying a feeding pressure to the product and a product dispensing head to which the product is supplied. An uninterrupted flow of the pressurized product to the inlet of the dispensing head is provided, and a product metering chamber is provided in the actual dispensing head, having a predetermined fixed maximum volume corresponding to that of a product portion to be dispensed and being displaceable as a shuttle between a loading position and a dispensing position wherein the metering chamber is collapsed for dispensing the fixed product volume.

Abstract: The present invention is an improved vibratory pumping mechanism that increases the efficiency of utilization of the vibratory motion within a mechanism. More specifically, the mechanism includes a central chamber within which a piston is oscillated to draw fluid into the chamber and expel fluid from within the chamber outwardly through a nozzle connected to the chamber. The chamber includes a pressure tube connected to a rearward end of the chamber and to a secondary chamber positioned around and in fluid communication with the chamber. The pressure tube allows the negative pressure generated by the motion of the piston in either direction to be utilized in preventing any fluid from being directed out of the mechanism in a direction other than through the nozzle, thereby increasing the efficiency of the pump.