Electromagnetically actuatable metering valve for successive delivery of measured volumes of fluid from a fluid reservoir

摘要

A metering valve, preferably electromagnetically actuatable, for the successive delivery of precisely measured volumes of fluid irrespective of inlet fluid pressure, including a valve core, slidably mounted in a cavity in the valve body, the top of the core closing a normally open fluid inlet when the core is moved to an uppermost position, and the bottom of the core closing a fluid discharge outlet when in its normal lowermost position, the volume of fluid discharged being the volumetric difference between the volume of the cavity and the volumetric displacement of the core.