Liquid additive metering
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United States of America Patent
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-
Apr 14, 1992
Grant Date -
N/A
app pub date -
Dec 5, 1990
filing date -
Dec 5, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Dosing apparatus for adding a metered quantity of liquid additive to slurry or other flowable material handled by a ram-type positive displacement main pump (10) includes a positive displacement metering pump (32) whose outlet (44) connects into a material carrying portion of the main pump e.g. its inlet (22). The metering pump is driven by a rocking lever (48) connecting it to the main pump ram (14) through adjustment means comprising a lead screw (62) along an arm (50) of the lever for selectively shifting a slide block (68) linked to the metering pump piston rod (42); the slide block being secured against movement on the lever arm once adjustment has been effected by clamping means (74).
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