Coulter Electronics, Inc.

James Harrington

Thomas J Godin

A pneumatically operated liquid transfer valve assembly capable of segmenting and transferring plural different volumes of liquid from like numbered liquid flow paths established through the valve and depositing said segmented volumes into like numbered adjacent liquid flow paths under the influence of pressurized fluid. At least two pairs of liquid flow paths are established and a linearly movable valve element carrying at least two pairs of segmenting bores is arranged selectively to intercept said pairs of liquid flow paths. One of each segmenting bore pairs intercepting one of each pair of liquid flow paths at one condition of the valve and the valve element being translated linearly to place said one of each segmenting bore pair in communication with the other of each liquid flow path pair with the other of each segmenting bore pair intercepting said one of each liquid flow path pair; the members of each segmenting bore pair being identical in volume but each bore pair being different in volume. Sealing of valve elements is obtained by maintenance of close clearances and a lubricating system is provided capable of supplying lubricant from reservoirs to the bearing surfaces within the valve simultaneously with each operation of the valve. The segmented volumes of said segmenting bores are provided by selection of the length and diameter of the bores. A pin and groove coupling is utilized to maintain the movement of the valve element linear.

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Fort Lauderdale, FL, United States of America

James Harrington