Abstract: The present invention provides a fluid dispenser for dispensing a fluid from a container. A roller is dimensioned to engage and roll along a portion of the container when the roller moves in a first direction from a first container-engaging position to a second container-engaging position. A sensor for sensing an object in a predetermined area is disposed near the housing. A light source is operable to emit a beam of visible light therefrom. The beam of light intersects the predetermined area. A controller is programmed such that when the sensor senses an object in the predetermined area, the controller energizes the light source to illuminate a target location where the fluid from the container is to be dispensed and the controller causes the roller to move in the first direction from the first container-engaging position to the second container-engaging position, thereby dispensing the fluid from the container.

Abstract: A venting system for a trigger sprayer includes an elongate vent member positioned in a vent hole in a closure cap of the trigger sprayer and a trigger actuator that is connected by a pivot connection to the trigger sprayer. The pivot connection of the trigger actuator is in close proximity to the vent member and the vent hole, and a finger engaging surface on the trigger actuator extends away from the pivot connection and away from the closure cap. Manipulating the trigger actuator toward the trigger sprayer causes the trigger actuator to pivot about the pivot connection and push the vent member into the vent opening of the closure cap, thereby opening a vent pathway through the closure cap. Releasing the trigger actuator allows the trigger to pivot away from the trigger sprayer and pull the vent member through the vent opening in the closure cap to close the vent pathway.

Abstract: An apparatus and method for dispensing a discrete volume of fluid. The apparatus includes a pump operable in discrete cycles, a power source connected to the pump, and a controller connected to at least one of the pump and the power source. The controller is configured to vary the power provided from the power source to the pump during at least a portion of each discrete cycle based on characteristics of the pump and the fluid. For example, the controller may vary power by controlling the duration of the provision of power, or by controlling the amplitude of the power. Varying the power is intended to improve the accuracy of the discrete volume of fluid dispensed. Correspondingly, the method of dispensing a discrete volume of fluid includes receiving information pertaining to the fluid to be dispensed, and adjusting a provision of power to a pump based on the information. The method may include adjusting the duration of the provision of power, or adjusting the amplitude of the provision of power.

Abstract: Device for ice cream distributor in cooled windows and similar, fit to prevent the ice cream melting in the outlet area comprises at least a duct with an outlet hole and control means of the ice cream flow. In the outlet duct (2) is inserted a piston (5) with a stem (6), or similar, which, at distributing position, is placed beyond the outlet hole (3) through which the ice cream exits. while, at rest position, is placed before the outlet hole (3), in such a way to block the ice cream exit. During the return motion, the piston (5) brings back the ice cream already in the duct into the inner portion of the cooled space, delimited by the dividing wall (4), or in same container (1), in such a way to avoid the ice cream melting at the end portion.

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: A dispensing system is disclosed which utilizes an electronically powered key device and/or identification code associated with a refill container to preclude the need for mechanical keys. The system utilizes a near field frequency response to determine whether a refill container is compatible with a dispensing system. In particular, the refill container is provided with a coil terminated by one of a number of capacitors. The container is received in a housing that provides a pair of coils that are in a spatial relationship with the installed refill container's coil. By energizing one of the housing's coils, the other coil detects a unique electronic signature generated by the container's coil. If the signature is acceptable, the dispensing system is allowed to dispense a quantity of material. The system also provides a unique latching mechanism to retain the container and ensure positioning of all the coils.

Abstract: A material dispensing assembly (100) and method of operation is disclosed for converting a portable cartridge dispensing tool to a bag-type dispensing tool. The assembly comprises a single piece piston (110) for advancing material though a material housing (104), the single piece piston (110) includes a substantially square-shaped receptacle (140). The assembly further comprises a square shaped drive rack (112) for attaching to the piston (110) at the substantially square-shaped receptacle (140) at a connection end (128). The drive rack (112) further comprises a plurality of teeth (142) located thereon. The assembly (100) further has a support (127) with a substantially square profile for receiving and supporting the drive rack (112) during operation such that the construct of the drive rack and piston (110) are prevented from rotating during operation.

Abstract: An apparatus for automatically dispensing a fluid includes a container adapted to carry a supply of fluid, and a valve connected to the container, wherein actuation of the valve dispenses the fluid. An apparatus position indicator is associated with the container and an object sensor is positioned near the valve. The object sensor monitors an area below where the valve dispenses when open and upon detection of an object opens the valve. Initial positioning of the apparatus triggers the apparatus position indicator to generate an appropriate signal until the object sensor is properly positioned and permanently secured. A control circuit in cooperation with a hidden switch allows programming of lighting indicators, dispense cycle size, and dispense quantities. The control circuit also provides for overload protection, motor braking and RF shielding. And an anti-vandal feature prevents excessive use of the apparatus.

Abstract: A shank clip adapted to couple a spout and mounting shaft assembly to a motor housing and support assembly in a fluid dispensing system. The shank clip comprises a first sidewall defining a perimeter that includes a first circular portion that defines a first radius; a second sidewall defining a perimeter that includes a second circular portion that defines a second radius greater than the first radius; and a bottom disposed between the first sidewall and the second side wall to define a channel.

Abstract: A hot melt adhesive or other thermoplastic material metering system has different output assemblies interchangeably mounted thereon in a modular manner. In this manner, if it is desired to effectively convert a particular metering system from one type of metering system to another type of metering system, a particular output assembly can be exchanged for a different output assembly. In addition, if a particular output assembly needs to be replaced or repaired, the particular output assembly can be simply removed and a new similar output assembly can be simply installed.

Abstract: A chemical injection system, comprising: a drive mechanism; a housing removably attached to the drive mechanism; at least one chemical inlet located on the housing; and, a valve spool located within the housing and provided with at least one chemical pass-through port, wherein the drive mechanism rotates the valve spool to align the chemical pass-through port with the chemical inlet.

Abstract: A disposable concentrate pump where the small pump body is part of a liquid collapsible bag reservoir, and the actuating solenoid is mounted in the dispenser. When a new bag is loaded, the attached pump body is inserted into a solenoid. When the bag is empty the in-bag part of the pump will be disposed of, along with the empty bag.

Abstract: A household liquid dispensing apparatus includes a container for holding a household liquid and a pump for pumping the household liquid out of the container. The pump includes a pump chamber. A dip tube is adapted to be positioned in the container and communicates with the pump chamber. An exhaust tube communicates with the pump chamber and an outlet for the household liquid. A pump actuator mechanically drives the pump. A motor operatively engages the pump actuator. The motor is electrically connected to a power source. A switch is electrically connected to the motor and the power source. A trigger assembly is operatively connected to the switch to control power delivered to the motor. The trigger assembly is positioned under the outlet for the household liquid for easy actuation by an upturned hand.

Abstract: A beverage dispensing apparatus is disclosed, comprising a solenoid pump coupled between a fluid inlet and a fluid outlet for pumping the fluid from said inlet to said outlet, said pump comprising a spring-loaded linear pumping member axially displaceable between a spring-loaded position and a spring-released end position and a controller for the solenoid pump, said controller being arranged to energize the pumping member into an intermediate position between the spring-released end position and the spring-loaded position. Consequently, the solenoid pump has improved noise characteristics and can be used to control the flow rate of the fluid whilst still being energized in substantially every cycle of an alternating current.

Abstract: A concentrate/extract cartridge for a beverage dispenser adapted to dispense a liquid concentrate/extract and a diluent is provided. The cartridge includes a hollow body for containing liquid concentrate/extract and an aperture. A pumping device is connected to the hollow body for dispensing the liquid concentrate/extract from the hollow body through the aperture. A method for dispensing a liquid concentrate/extract from a beverage dispenser using a concentrate/extract cartridge is also provided in which the concentrate/extract does not come into contact with the dispenser.

Abstract: A fluid dispenser that includes a dosing chamber, a piston member, a fluid outlet through which fluid will be dispensed, a fluid conduit configured to convey fluid from the dosing chamber towards the fluid outlet, and a seal for sealing the fluid outlet is described.

Abstract: A liquid material ejector which is adaptable for a liquid material of any viscosity, which has a structure where any part of the ejector has neither unnecessary projection nor extension in the horizontal direction with respect to the advancing/retracting direction of a plunger, and which enables a plurality of ejectors to be arranged side by side in a closely adjacent relation.

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: An articulated driving mechanism (2) is composed of several inflexible links (1, 1?, 1?, 79, 84) in succession, the links of each pair of adjacent links being interconnected by means of a link pin (16, 16?, 16?), arranged in both the adjacent links in such a manner that the links are pivotal in relation to one another about the axis of the pin. The links of each pair of adjacent links are mutually displaceable in the transverse direction of the link pin between a first position, in which the adjacent links are pivotal in relation to one another about the axis of the link pin, and a second position, in which corresponding meshing surfaces of each adjacent link abut one another and lock against mutual pivoting of the adjacent links. The link pin is displaceable in an elongated hole (23, 82, 89) in at least one of the links.

Abstract: A fluid dispensing device includes a pressurizing device coupled between a fluid bottle and a discharge tube for forcing the fluid to flow through the discharge tube without gravity, the pressurizing device includes a container having an inclined inner peripheral surface, and a piston slidably received in the container and having an outer peripheral portion for selectively engaging with the inclined inner peripheral surface of the container in order to pump the fluid into the discharge tube when the piston is moved toward the discharge tube, and for being selectively disengaged from the inner peripheral surface of the container when the piston is moved away from the discharge tube.

Abstract: A grease output device for an electrical grease gun has a body, a double-cam member and a driving member. The body has a holder and a seat mounted with the holder. The double-cam member connects to the body and has a driven unit and a driving unit. The driven unit has a driven gear and two cams misaligning with the driven gear. The driving gear has two rings mounted around the cams and two pistol rods connecting to the rings. The driving unit has a driving gear engaging with the driven gear. The driving member connects to the body to rotate the driving gear so the driven gear is rotated to push the rings. Hence, the grease can flow out of the body successively by the pistol two pistol rods moving back and forth alternatively.

Abstract: The invention relates to a container system comprising a container with an integrated pump mechanism of a submersible pump, particularly a drum pump or a container pump with a pump lance. This pump lance can be inserted into the container via a bunghole, and a rotor shaft, which has a pump rotor mounted thereon in a rotationally fixed manner and which is actively connected to a drive motor, extends through the pump lance. By virtue of the fact that the submersible pump has a pump head and a pump mechanism, which are designed so that they can be separated from one another, and a withdrawal connection is assigned to the pump head that can be removed from the pump mechanism, the invention ensures that the container, which is advantageously provided with a bunghole that is drawn deeper or is otherwise situated lower, forms, together with the pump mechanism integrated in the container, a stackable and transportable unit that can be sealed tightly. The invention is for use in SCR technology or AdBlue® technology.

Abstract: A disposable concentrate pump where the small pump body is part of a liquid collapsible bag reservoir, and the actuating solenoid is mounted in the dispenser. When a new bag is loaded, the attached pump body is inserted into a solenoid. When the bag is empty the in-bag part of the pump will be disposed of, along with the empty bag.

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 silicon gel dispensing device has a barrel connected with a compressor and having a discharging tube, a container mounted inside the barrel and connected securely to the discharging tube and a driver mounted beside the barrel and having an extendable axle attached to a piston of the container. The axle selectively pushes the piston to keep the piston closely abutting the silicon gel inside the container. So that high-pressured air inside the barrel for pressuring the piston is hardly permeating through a slight gap formed between the container and piston. Thus bubbles mixed with the silicon gel are avoided and silicon gel residue and uneven application surface occurring due to bubbles are effectively prevented too.

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 fluid dispensing device includes a pressurizing device coupled between a fluid bottle and a discharge tube for forcing the fluid to flow through the discharge tube without gravity, the pressurizing device includes a container having an inclined inner peripheral surface, and a piston slidably received in the container and having an outer peripheral portion for selectively engaging with the inclined inner peripheral surface of the container in order to pump the fluid into the discharge tube when the piston is moved toward the discharge tube, and for being selectively disengaged from the inner peripheral surface of the container when the piston is moved away from the discharge tube.

Abstract: A pressurized fluid dispenser includes a base unit and a reservoir. The base unit includes a pump and a battery compartment including electrical contacts electrically connected with the pump. The reservoir is supported by and selectively removable from the base unit. The reservoir includes an internal compartment that is in fluid communication with the pump when the reservoir is connected to the base unit. A female panel mount for an electrically operated unit is also disclosed.

Abstract: A hot melt adhesive metering pump assembly, and an integral reservoir tank fluidically connected thereto and the hot melt adhesive metering pump assembly comprises a plurality of rotary, gear-type metering pumps which are arranged in a compact, longitudinally spaced manner upon a drive gear manifold. All of the driven gears of pumps are respectively driven by manifold pump drive gears which are rotatably mounted upon a common motor-driven rotary drive shaft rotatably disposed within the drive gear manifold, and a first side wall member of a base portion of the reservoir tank is integrally connected to a side wall portion of the drive gear manifold, while a second side wall member of the base portion of the reservoir tank is provided with a plurality of hose connections to which hot melt adhesive delivery hoses are to be connected so as to respectively convey the precisely metered amounts of the hot melt adhesive material toward the applicator heads.

Abstract: A valve having a membrane for controlling flow through the valve, the membrane having open and closed positions. 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. An actuator is provided for easing or initiating the movement of the membrane. In some embodiments, the valve may take the form of a valve assembly for use in a variety of applications, for example, a valve assembly for relieving a vacuum pressure wherein the assembly includes intake and exhaust ends, a membrane for controlling flow through the assembly, a spring providing a closing bias to the membrane that the vacuum pressure may overcome to move the membrane, and an actuator for initiating the movement of the membrane.

Abstract: A liquid-dispensing device includes a liquid-containing unit, a flexible tube, a nozzle, and a cam mechanism. The flexible tube is connected to the liquid-containing unit. The nozzle is connected to the flexible tube. The cam mechanism includes first and second cams, and first and second cam followers. The first and second cams are co-rotatable. Each of the first and second cam followers is driven by a respective one of the first and second cams to move to a squeezing position, where each of the first and second cam followers exerts a squeezing force on the flexible tube.

Abstract: A device (3) for metering a base liquid and mixing this base liquid with a diluent to prepare a food product, has means for connecting it with a container (4) containing the base liquid, the device (3) comprising: a diluent inlet (71), a mixing chamber (80) for mixing the base liquid with the diluent. Air inlet means are provided for selectively having ambient air enter the device and guiding it to the container (4). Control means are provided for selectively metering the base liquid into the mixing chamber and for selectively enabling an air flow through the air inlet means only during periods when no base liquid is metered into the mixing chamber.

Abstract: A device for blending a binder component (A) and a hardener component (B) to a pasty or liquid material to be mixed, in particular for producing a ready-made filler for the filling of surfaces of vehicle bodies, has store tanks (3a, 3b) for the separate storage of the components (A, B) which are filled with the components (A or B). The store tanks (3a, 3b) are connected with at least one mixing chamber by separate supplying channels (13a, 13b). The mixing chamber has at least one delivery opening (21) for the material to be mixed. A metering device is provided for the delivery of the components (A, B) out of the store tanks (3a, 3b) through the mixing chamber to the delivery opening (21).

Abstract: An apparatus for dispensing a post-foaming gel soap is disclosed. The dispenser includes a housing containing a first actuator and a second actuator. A motor is operatively connected to said first and second actuator. A circuit is connected to said motor, as well as a sensor assembly and a power supply. In operation, said first and second actuator moves a stem valve and a cylindrical pump located on a reservoir containing a gel soap and an inert propellant gas. The cylindrical pump operates on a piston principle and also closes to prevent any dripping after use. Further disclosed are various methods of accurately dispensing a consistent dose of gel soap.

Abstract: Some embodiments of an infusion pump device may include a drive system that accurately and incrementally dispenses fluid from the pump device in a controlled manner. Particular embodiments of the drive system may include a rotational motor that is coupled to a string member, which is used to adjust a pawl relative to a ratchet body. In such circumstances, the drive system can provide a reliable and compact infusion pump device that accurately dispenses the desired volume of fluid.

Abstract: An automatic fluid soap dispensing apparatus and method including a dispensing spout, housing operatively connected to the dispensing spout and the housing adapted to removably receive and hold a fluid soap containing reservoir module in communication with the dispensing spout. The reservoir module has a central axis, and includes a pump mechanism and delivery tube mounted on the reservoir module in alignment with the central axis. The dispensing tube is adapted to move in the dispensing spout when the pump mechanism is actuated.

Abstract: A magnetic coupling system may be used in a fluid displacement apparatus to magnetically couple a drive shaft to a piston. The magnetic coupling system may include first and second magnetic couplers at the ends of the drive shaft and piston, respectively. The first magnetic coupler and second magnetic coupler may be configured to exert an attractive force. A bearing between the magnetic couplers reduces friction and side loading.

Abstract: An electronic self contained viscous liquid dispenser includes a housing defining an internal liquid reservoir. A dispensing pump mechanism is carried by the housing and disposed in liquid communication with the reservoir. The pump mechanism has a delivery end disposed for delivering metered doses of viscous liquid from the reservoir. A mounting assembly is configured for mounting on a supporting wall structure, with the housing being releasably attachable to the mounting assembly. An electronic actuating mechanism is carried by the mounting assembly and includes a motor driven actuator that engages with the pump mechanism upon insertion of the housing into the mounting assembly. A motor and associated power supply circuitry is carried by the mounting assembly, with the motor being in driving engagement with the motor driven actuator.

Abstract: A dispenser for food material that facilitates spreading of the 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 food material can be attached to the dispense, and the material within can be dispensed into a utensil such as a spoon for serving. The dispense provides metered dispensing.

Abstract: An apparatus converts rotary motion of a motor drive shaft into oscillatory motion of a work piece, for example, in a power tool. The apparatus comprises a planetary gear assembly connected to the motor for rotating an output gear. The output gear meshes with a drive gear including a drive pin. The drive pin fits in a yoke slot for reciprocation of the yoke upon rotation of the drive gear. The yoke is operatively connected to the work piece. An air flow system cools the power tool housing. The housing has an inlet aperture in the handle portion and an outlet aperture for placing the interior of the housing in communication with the atmosphere. A wall integral with the handle portion engages the body of the motor housing between a first end and openings in the body.

Abstract: A fluid extruding device is provided. In one embodiment, the fluid extruding device has a cartridge receiving aperture configured to receive a fluid cartridge with first and second cylindrical chambers. The fluid extruding device further includes an activation mechanism, a motor having a shaft, wherein the motor is configured to selectively rotate the shaft either a clockwise or counterclockwise direction, and an elongated screw connected to the shaft of the motor. In one embodiment, a movable body engages the elongated screw, and is connected to a first piston and a second piston. The first piston has a first pushing plate configured to engage a back of the first cylindrical chamber of the fluid cartridge and the second piston has a second pushing plate configured to engage a back of the second cylindrical chamber of the fluid cartridge.

Abstract: A device for dispensing a flowable material is disclosed. The device includes a container holding the flowable material therein and a pumping assembly attached to the container. The pumping assembly includes a pump and a placard portion configured for displaying viewable information thereon associated with the flowable material.

Abstract: This patent discloses tools, methods and systems for dispensing soap. The tools, methods and systems include a draw-back chamber constructed around and in line with the fluid path between a spout assembly for delivering soap to a user and a pump mechanism for supplying the soap. The draw-back chamber contains port openings into the fluid path. When the pump mechanism is actuated to dispense soap, the draw back chamber is collapsed and soap within it is dispensed with the main dose of soap supplied by the pump mechanism. When the pump mechanism is allowed to return to its extended rest state, the draw-back chamber expands, drawing soap into it through the port opening to prevent soap from hanging and dripping at the end of the dispensing tube.

Abstract: An ejection device for a mass-containing package (12) includes at least one piston rod (16) having a toothing (17) extending along its longitudinal extent, and a drive unit (21; 41) for displacing the at least one piston rod (16) and having at least one gear wheel (24; 44) engageable with the toothing (17) of the at least one piston rod (16) and displaceable from a first position, in which it engages the toothing (17) of the at least one piston rod (16), to a position in which it is disengaged from the toothing (17) of the at least one piston rod, and a drive motor (22) for driving the at least one gear wheel (24; 44).

Abstract: A fluid dispensing device includes a fluid bottle, a discharge tube, a pressurizing device coupled between the bottle and the discharge tube for forcing the fluid to flow through the discharge tube without gravity, the pressurizing device includes a container coupled between the bottle and the discharge tube, a piston is slidably received in the container, and a motor is coupled to the piston to move the piston in the reciprocating action within the container, and a speed reduction device is coupled between the motor and the piston for allowing the piston to be actuated by the motor with a reduced driving speed and an increased driving torque.

Abstract: An infusion device comprises a pusher for a plunger of a syringe containing a liquid to be infused. A load cell measures the push force. An encoder associated to a motor commanding the pusher measures the displacement of the pusher. A controller signals an alarm when the ratio between the variation of the push force and the displacement exceeds a predetermined threshold. The device, which serves for infusing an anticoagulant into an extracorporeal blood circuit in a dialysis apparatus, is able to signal an onset of an anomalous situation of lack of infusion in good time.

Abstract: An apparatus for attachment to a bucket for holding a liquid is attached to a bucket with an upper rim. A bail is pivotally attached to the bucket as in a conventional arrangement, the bail having an upper position and a lower position. The apparatus has a housing with a pump operatively attached thereto, the pump having an inlet in liquid communication with the bucket and an outlet for facilitating the pumping of liquid from the bucket, preferably through a spray wand with a nozzle at the outlet thereof. A member is pivotally attached to the housing at one end thereof and has a notch in another portion thereof. This member has at least a first pivotal position and a second pivotal position. When housing is on the rim, the bail is in the upper position thereof and the member is in the first pivotal position thereof so that a portion of the bail is in the notch for thereby holding the housing to the upper rim of the bucket.

Abstract: A soap dispensing apparatus for an automatic countertop soap dispenser, comprising a motor and a reduction gear set driven thereby, said reduction gear set with an output shaft coupled to the drive gear of a pair of soap displacing gears in mesh side by side, said soap displacing gears disposed, by precision fit, in a chamber that extends upward and downward to form an outlet passage and an inlet passage, wherein the outlet passage is connected to a countertop soap dispensing spout, and the inlet passage to a soap containing reservoir. Whereby an upward suction force induced by the rotation in mesh of the drive gear and the idler gear of said soap displacing gears is used to suck the liquid soap through the inlet passage and out of the outlet passage, thus to lift the liquid soap above countertop to achieve soap dispensing.

Abstract: A liquid metering system is disclosed for pumping two components of an adhesive into a mixer. The liquid metering system uses gear pumps of certain dimensions to pump each component into a manifold which delivers the components to a mixer where the components become an adhesive. A fixed mass flow ratio related to the size of the gear pumps is automatically established because the gear pumps are driven by the same motor at a fixed speed ratio. The self-metering system eliminates the complexity of known adhesive pumping systems.

Abstract: A device for dispensing a viscid material includes a supporting body constructed by a carriage. A ball screw is installed within the supporting body. A rod piston is mounted on one end of the ball screw. A transmission module is mounted on a nut of the ball screw. The transmission module is engaged with an actuator controlled by a control circuit device. The control circuit device, which includes a switch and a circuit board, etc, controls the positive and negative rotations and the stop operation of the actuator. A trigger is set up on one side of the supporting body. When the trigger is pressed, the actuator is driven to rotate in the positive direction to drive the ball screw to move forwardly in a stable way. While the trigger is released, a sensor is activated to drive the actuator to rotate in the negative direction.