Apparatus for automatically processing slurry

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United States of America Patent

PATENT NO 4545736
SERIAL NO

06498941

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A reciprocating ram pump of the well known Willett's type is provided with electrical sensors (S1 and S2) and a solenoid operated valve (56) for controlling reversal of the ram at its delivery and suction stroke limits. The sensor outputs are employed for the purpose of counting the number of strokes executed by the ram in a counting circuit (22) which can be preset by means of keyboard (26) to count until a stroke count corresponding to the preset value (or a threshold value close thereto) as been reached whereupon a warning signal may be produced. The number of strokes counted may be indicated on display (28) for example after conversion into a parameter such as total volume delivered. The preset value entered from the keyboard (26) may likewise be displayed. The sensor outputs may additionally be employed to control a timing circuit (24) which can be preset to time a certain interval corresponding to the delivery stroke rate of the pump falling to or below a certain level. In this event, a warning signal may be produced.

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Patent Owner(s)

Patent OwnerAddress
THOMAS WILLETT & CO LTDWHITTLE ROAD MEIR STOKE-ON-TRENT ST3 7TP

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Walton, Francis R Longton, GB2 1 10

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