| 摘要 |
<p>In a metering vibrating pump in variable flow rate condition a system and a device for having desired liquid quantities supplied comprising a memory circuit (36) set a supply beginning signal (38), a counter (24) counting a certain pump stroke number detected by a detector (12) of piston position in said pump, a numerical comparator (28) comparing the numbers emitted by the counter (24) with preset numbers formed by a numerical combinator (32) for outputting a reset signal for said memory circuit (36), said memory circuit (36) starting the pumping operation when it is set and stopping said operation when it is reset.</p> |
