Abstract: A paint colorant dispenser for dispensing colorants into both large and small containers includes a cabinet for accommodating a plurality of color and canisters in fluid communication with a common dispense outlet. A container shelf unit is disposed in front of the cabinet and below the dispense outlet. The shelf unit includes a horizontal base disposed below the dispense outlet upon which large containers can rest. The shelf unit also includes a pivoting shelf which can pivot upward and provide a horizontal resting surface closer to the dispense outlet for smaller containers. A controller, keyboard and monitor are contained in a second modular cabinet that can be disposed on either side of the first cabinet. An additional modular cabinet can be provided for accommodating additional colorant canisters. A drip containment system is disposed in the modular shelf unit.

Abstract: A valve assembly for a fluid dispenser includes a housing having at least a first opening and a second opening, and a valve member fitted in the housing, the valve member being rotatable about an axis and including a first channel, extending along said axis and communicating with the first opening in the housing, and at least two outlet channels radially extending from the first channel to the circumference of the valve member, wherein each of the radially extending outlet channels can be brought into registry with the second opening by rotating the valve member.

Abstract: A system for pressurized liquid extraction and purification of solid samples includes a pressurized liquid extraction (PLE) module including a PLE cell, a heating element, a high-pressure source of an extraction solvent, a pressure regulator, and a cooling coil. The PLE module continuously performs high-pressure, high-temperature extraction on the solid sample to yield liquid sample. The liquid sample is concurrently provided to a purification module including one or more columns. The purification module yields a purified liquid sub-sample containing substantially all of a specific trace substance present in the solid sample. The sub-samples are transferred to a concentrator assembly through a collector inlet. The concentrated sub-sample can be used in subsequent analysis to determine the concentration of the trace substance in the original solid sample.

Abstract: A mixer for fluid material in containers of varying sizes rotates the material continuously in one direction about a first axis and simultaneously about a second axis which is non-perpendicular to the first axis, the first axis rotating about the second axis. The mixer rotates the container simultaneously about the two axes. Desirable top to bottom circulation of the fluid within the container is achieved. The container support is capable of accommodating containers of varying lengths and diameters.

Abstract: A fluid dispense system having a computer control system that operatively controls a stepper motor driving a pump. The stepper motor actuates the pump piston through partial revolutions. The computer control system determines the number of stepper motor steps required to pump a desired amount of fluid by the pump by rotating the piston through segments which are less than a full revolution. Further, the controller varies the speed of the stepper motor to avoid splashing of the dispense fluid and motor stalling.

Abstract: An improved paint mixer is disclosed which includes a base and an upper cabinet pivotally connected to the base. The upper cabinet can be pivoted from a first rearward position which provides access to a front section of the base and a second forward position which provides access to a rear section of the base. As a result, both the front and rear section of the base are easily accessible for service, maintenance, and cleaning. A support system that includes three adjustable legs provides improved support and stability. Casters disclosed at the rear end of the bottom of the base along with a recessed wall of the base and a handle disposed at the front of the base make it easier to move and/or relocate the mixer. Non-stick coatings in the form of a paint-resistant coating or an anti-graffiti coating to the inside surfaces of the mixer facilitate the removal of accumulated paint.

Abstract: A gear pump having a housing with an inlet and an outlet. First and second gears are provided with meshing gear teeth. The gears are ceramic rotor gears which are journaled within the housing. A drive shaft drives the first gear in order to move it relative to the second gear, such as to pump a fluid from the inlet to the outlet of the housing. The housing includes an opening for the passage of the drive shaft and a seal surrounding the opening. The seal includes a first seal part rotating with the first gear, and a second seal part forming part of the housing. The first and second seal parts have facing sealing surfaces, are made of ceramic material and are loaded towards each other by a biasing member parallel to the drive shaft. In this way, a mechanical seal is created between the gear and the housing obviating the need for a seal between the drive shaft and the housing.

Abstract: A fluid dispense system having a computer control system that operatively controls a stepper motor driving a nutating pump. The stepper motor actuates the nutating pump piston through partial revolutions. The computer control system determines the number of stepper motor steps required to pump a desired amount of fluid by the nutating pump by rotating the piston through segments which are less than a full revolution.

Abstract: A device and method are provided for securely holding a lid on a container. The device includes a base having an upper surface and a lower surface. An expanding means projects upward from the upper surface of the base. The expanding means contacts both the base and part of the container and can be arranged for applying a downward pressure to the base:for pressing the lid against the container. A method utilizing the device includes the step of placing the lower surface of the base against the lid of a container. A portion of the expander means then engages a portion of the container. The lid is then pressed against the container by forcing the base against the lid using the expander means.

Abstract: A fluid dispense system having a computer control system that operatively controls a stepper motor driving a nutating pump. The stepper motor actuates the nutating pump piston through partial revolutions. The computer control system determines the number of stepper motor steps required to pump a desired amount of fluid by the nutating pump by rotating the piston through segments which are less than a full revolution.

Abstract: A fluid dispense system having a computer control system that operatively controls a stepper motor driving a nutating pump. The stepper motor actuates the nutating pump piston through partial revolutions. The computer control system determines the number of stepper motor steps required to pump a desired amount of fluid by the nutating pump by rotating the piston through segments which are less than a full revolution.

Abstract: An apparatus for dispensing viscous fluids includes a turntable rotatable around an axis of rotation. A plurality of pumps are attached to and distributed around the axis of the turntable. The pumps each have a connector for releasably connecting a fluid package thereto for dispensing fluid therefrom and have associated first positioning members. A plurality of removable rigid holders is adapted to receive a flexible fluid package therein in a predetermined position. The holders include second positioning members adapted to coact with the first positioning members to enable placement of the holders onto the turntable such that the package received therein is connected to the respective connector.

Abstract: A gear pump comprises a housing having an inlet and an outlet. A first and second gear each have gear teeth which are in engagement with each other. The first gear is a rotor gear which is journaled within the housing and is drivable. It includes means for driving the first gear in order to move relative to the second gear, such as to pump a fluid from the inlet to the outlet of the housing.The housing includes inner housing parts encasing the gears and a single piece mold around the inner housing parts enclosing the gear pump.

Abstract: A valve assembly has a unitary teflon valve housing with six peripheral facets. A recessed area on the surface of each facet forms a valve seat. Pairs of fluid channels formed in the housing each terminate at openings at a central, planar area of a corresponding valve seat. A pair of rigid tubes are disposed in the openings at each valve seat, each tube forming a fluid-tight seal with periphery of the corresponding opening. The tubes extend slightly beyond the surface of the housing by a predetermined clearance. A diaphragm made of a resilient material covers the valve seat. The periphery of the diaphragm is in fluid-tight sealing engagement with the periphery of the valve seat. A central portion of the diaphragm is coupled to a solenoid above the diaphragm. The solenoid moves the diaphragm central portion between a closed position toward the valve seat and an open position away from the valve seat.

Abstract: An apparatus for dispensing viscous fluids includes a turntable that is rotatable about an axis of rotation. The apparatus is connected to a plurality of containers that contain fluid to be dispensed. The containers are mounted to the turntable in a spaced relationship about the circumference of the turntable. The turntable is also connected to a plurality of pumps, one pump associated with each container. The pumps include connectors that are releasably connected to the containers and that facilitate the removal of an empty container for replacement with a full container. The apparatus also includes an actuator that facilitates the removal of an empty container. The pumps are preferably disposed on an opposing side of the turntable from the containers. The apparatus also includes a plurality of rollers disposed at the outer circumference of the turntable for supporting the turntable in the radial and axial directions.

Abstract: A dispensing system for dispensing viscous fluids from flexible packages is provided. The flexible package is connected to a pump by way of a conduit. A buffer system may be provided which results in an emptying of the flexible package of fluid first prior to the emptying of the buffer system. A valve may be provided to isolate the flexible package thereby enabling the flexible package to be removed and replaced with a full package while the pump continues to draw fluid out of the buffer system. Accordingly, the flexible package of fluid may be replaced without interruption of the dispenser. A self-cleaning closure for the outlet to the dispenser may be provided to keep the outlet clean.

Abstract: A clamping mechanism is provided for mixing apparatuses and other apparatuses that utilize clamping mechanisms. The clamping mechanism incorporates a clutch mechanism which prevents overtightening of the clamp mechanism in the closed or clamping direction. Also, the clamping mechanism incorporates a plurality of pins that serve as a stop to prevent the traveling arm of the clamp mechanism from being tightened against the stationary arm and further serve as a bias for the clutch mechanism to bias the male and female clutch components into a mating engagement thereby enabling the clamping mechanism to be easily rotated out of the fully open position and prevent a jamming of the clamping mechanism in the fully open position.