Abstract: A base valve, a base pump, a catalyst valve, a catalyst pump, a mixing chamber, a base cylinder connected to the base valve, and a catalyst cylinder connected to the catalyst valve. The base and catalyst cylinders are actuated so as to push base and catalyst fluids out of the base and catalyst cylinders, respectively, and into the mixing chamber. An electronic controller has a ready mode and a dispensing mode. In the ready mode, the controller i) activates the base and catalyst pumps and ii) signals the actuator to push or pull, in response to a dispense signal being asserted. In the dispensing mode, the controller a) deactivates the base and catalyst pumps, b) signals the actuator to stop pushing or stop pulling, and maintains a) and b) in response to the dispense signal being de-asserted. Other embodiments are also described.

Abstract: A manually actuated dispensing gun can deliver different fluids to be mixed. The gun has a body assembly with first and second valves. A lever arm manually actuates the valves. A cap has first and second fluid inlets that are coupled to respective controlled fluid outlets of the valves. The cap has a duct that opens into and runs from a first inlet to a first cap outlet, and another duct that opens into and runs from the second inlet to a second cap outlet without opening into the other duct. One of the ducts has a larger cross-section flow area along its entire length than the other. Other embodiments are also described and claimed.

Abstract: A fluid dispensing gun that features a cap with first and second inlets to receive separate, metered flows of fluid. The cap has a first duct that to direct flow from the first inlet to a first outlet. A check valve receives flow from the second inlet. The duct and the check valve are arranged to bring fluid flow from the first inlet into contact with fluid flow from the second inlet. The cap may be a separate, disposable piece, so that the gun need not be purged after each use.

Abstract: A compact assembly for mixing two or more fluids comprising a housing having interior serpentine flow channels. The channels are defined by alternating upward and downward extending partitions. The tip end of each partition is offset from respective interior surfaces of the housing top and bottom walls. Each offset defines a curved passage which interconnects the channels and forms a continuous zigzag flow path through the housing. Fitted within the channels are preformed static mixing units to provide additional mixing action.

Abstract: A fluid dispensing gun is provided which is manually operated by a lever arm and cam mechanism. As an operator draws the lever arm to an open flow position, a pivot plate displaces a cam bar to which is attached a valve stem. This causes movement of the valve stem away from a valve opening and permits fluid flow. A U-shaped stem housing and an open tubular spring housing provide convenient access for axial adjustment of the valve stem and compression adjustment of the valve spring.

Abstract: A metering and dispensing machine that operates in accordance with the position of a cross-bar. The cross-bar is powered by a pneumatic cylinder and reciprocates two piston pumps that draw liquid from storage vessels during a back stroke. The liquid is expelled during a forward stroke through a valve and an outlet opening. The amount of liquid dispensed is determined by the pump chamber volume and pump piston draw distance. Each pump is removably secured directly to a valve block. To vary the ratio of liquids expelled from the pumps, at least one of the pumps is replaced with a larger or smaller pump. Each valve head includes a plug valve which is rotated from a fill position to a dispense position by an independent valve drive mechanism. The mechanism is actuated by sensor switches which are activated by predetermined positions of the cross-bar.

Abstract: An interfacial surface generating means having an inlet end, an outlet end and a plurality of separate passageways connecting the two ends. The ends of the passageways at the inlet end lie along a first line and the ends of the passageways at the outlet end lie along a second line. The second line extends substantially normal to the first line. Each of the ends being dish-shaped and having connecting means to fasten a plurality of surface generators together in a liquid-tight manner. The adjacent dish-shaped ends forming a mixing chamber between adjacent surface generators.

Abstract: A forcepslike device for cutting and squeezing tubing. The forceps comprise a pair of pivotally joined arms having cutting edges on one end to cut in a scissorlike fashion and finger engagable loops at the other end. A roller is mounted on each of the arms. The rollers are movable toward each other to grip a flexible plastic tube between them when the forceps are closed. The rollers have matching configuration to insure proper gripping of the tube to clear the tube of its contents.

Abstract: An apparatus for metering, mixing, dispensing, testing and purging liquid compositions composed of predetermined ratios of reactive liquid components. Pressurized sources of the component liquids are coupled to valve mechanisms and liquid metering devices. The materials are metered in predetermined ratio to each other and fed to a mixer to be intimately combined and dispensed at a demand station for the intended use. A valve mechanism is provided immediately following the pressurized source of one of the liquids and upon operation of the valve this liquid is diverted around the valve and metering device and is fed directly into the first area in which the two liquids are co-mingled, thereby purging the entire area in which the co-mingled liquids exist. Upon operation of the purging valve, the entire operation of the valves and metering devices are stopped thereby significantly reducing the wear and tear on this portion of this apparatus.

Abstract: A liquid delivery system, particularly for liquids sensitive to water or in which no bubbles should be included, which permits dispensing the liquid directly from the container in which it was shipped and stored. The delivery system attaches directly to the container and has a breather tube communicating with air head space above the liquid. The breather tube can be opened and closed manually. The breather tube allows air or gas to enter the head space as liquid is dispensed from the container. In operation, the liquid delivery system is attached to the liquid container and the container and system are placed on an inversion device. The container is inverted in use.

Abstract: An apparatus for mixing, dispensing and purging therefrom liquid compositions comprising two or more liquid components. Independent pressurized sources of the component liquids are coupled to a manifold assembly through appropriate check valves, the output of the manifold assembly being coupled to a serial assembly of mixing chambers and a flow gun. The check valves used to inhibit the flow of the component liquids each comprise a cylindrical member having a resiliently urged mating valve which halts the flow of the respective liquid upon a reduction in liquid pressure. A pressure relief valve is disposed intermediate the source of a catalyst component and the respective check valves to substantially reduce the pressure of the catalyst at the check valve so that the amount of base liquid required to purge the apparatus of the curing composition is substantially reduced.

Abstract: A metering system for delivering and metering two combinable and cooperatable liquids, in predetermined ratios in order to enable ultimate combining of such liquids or the fluids. The apparatus comprises a first discrete valve mechanism which is capable of receiving a first fluid from a source and a cooperating first discrete metering mechanism; a pumping mechanism for receiving the fluid from and directing fluid to this first valve mechanism. The apparatus also comprises a second discrete valve mechanism capable of receiving a second fluid from a source and an associated second discrete metering mechanism; a pumping mechanism for receiving fluid from and directing fluid to this valve mechanism. An actuating device operatively connects the first and second valve mechanisms and the first and second metering mechanisms in order to enable the first metering mechanism to pump the first fluid to and from the first valve mechanism and the second fluid to and from the second valve mechanism.