Other

Johnson & Johnson Gmbh

Ivek Corporation

Scotia Recovery Systems Limited

Mineral Separation Corporation

Vernon W Zeitz

Douglas S Bensley

Martin C Kuhn

John E Barney

Mark N Tanny

Leonard E Poetschke

Raymond A LeBlanc

A rotary/reciprocating liquid dispensing pump for dispensing liquids in the nanoliter range has a narrow radial slot extending longitudinally from an end of a reciprocating, rotating cylindrical piston sliding in a smooth cylindrical bore of a pump housing at a closed end thereof, which slot extends outwardly to the periphery of the piston. The piston is selectively positioned in alignment with one of a plurality of circumferentially spaced small diameter radial passages within the housing opening directly to the cylindrical bore in the path of rotation of said slot. The ports thereof opening to the cylindrical bore are spaced circumferentially a distance in excess of the width of the slot. A linear liquid dispensing pump apparatus including such pump includes a stepping motor and an electromagnetic clutch/braking mechanism concentrically surrounding a lead screw, and the lead screw is threadably engaged with a stepping motor tubular rotor shaft. An anti-backlash assembly operatively couples the stepping motor tubular rotor shaft to the lead screw. The stepping motor is incrementally pulsed and the electromagnetic clutch braking mechanism energized for selective incremental rotation of the lead screw.

Linear liquid dispensing pump for dispensing liquid in nanoliter volumes

An electro-optical circuit for detecting fluid in a translucent or a transparent duct or tube, this circuit including an AC activated light emitting diode (LED) for transmitting a narrow beam of light through the tube and a photo transistor detection, sub-circuit activated by the LED light beam, the power to the LED being adjusted to operate the photo transistor of the detection circuit in its unsaturated, active region of operation.

Electro-optical fluid detector

Apparatus and processes are disclosed for treating materials by exposure thereof to sonic or ultrasonic oscillations produced by oscillating plates which form part of a processing chamber and which are each activated by a plurality of transducers adjacent thereto. The transducers are excited by an electronic circuit capable of driving each transducer at selectable frequencies, phase relationships and amplitudes. The invention also comprises processes for the treatment of materials by exposure thereof to oscillating plates excited at predetermined combinations of frequencies, phases and amplitudes.

Apparatus for ultrasonic processing of materials

A pump may be provided for valveless, positive-displacement, rotary operation having at least one piston operating within a cylinder and preferably describing a complex motion including both reciprocating and rotary motions whereby vacuum and pressure forces may be alternately created at ports into the cylinder.

Valveless, positive displacement pump

Apparatus suitable for making a coal-oil-water fuel mixture includes a grinder for grinding coal to a relatively fine particle size, a mixer for controllably mixing the coal particles with water and oil and a sonic agitator to stabilize the mixture. The sonic agitator comprises a processing chamber associated with or having two opposed plates which are oscillated by appropriate transducers at controllable phase frequency and amplitude. The spacing between the plates is preferably of the order of 500 meters per second divided by the applied sonic frequency, and is at least 25 mm.

Apparatus for manufacturing and stabilizing coal-oil-water fuel mixture

A precision controlled variable speed pumping system for controlling the operation of one or more independently driven pump motors includes one or more valveless rotary pumps each having a reciprocating piston directly driven by an individual stepping motor and a digital control circuit for individually directing the operation of each stepping motor whereby the resultant sum output of the pumps may be utilized for mixing, blending or proportioning fluid flow.

Digital proportional metering pumping system

Talc compositions with improved fragrance stability and other desirable characteristics comprising talc, fragrance and polyethylene glycol having a molecular weight of from 100 to 1500.

Talc compositions

A bistable optical switch for use in control of fiber optic light transmission for blocking one path while opening another is provided having at least a single movable member which may be positionable within a guide member for interrupting at least one optical path therethrough. The movement and position of the movable member may be electrically controllable by attracting and repulsing force members while preferably no power is required to maintain a stable position.

Growing community of inventors

N. Springfield, VT, United States of America

Vernon W Zeitz