System and device for supplying desired liquid volumes by means

Details System and device for supplying desired liquid volumes by means System and device for supplying desired liquid volumes by means

1988-03-29

1991-02-19

Lall, Parshotam S.

Boots, shoes, and leggings

364509, 222 71, 417 44, 417411, 417410, G01F 124, F04B 4906

Patent

active

049949845

ABSTRACT:
For a metering vibrating pump in a variable flow rate condition, a system and a device is provided for supplying desired liquid quantities comprising a memory circuit (36) set by a supply or energization starting signal (38), a counter (24) counting a certain pump stroke number detected by a piston position detector (12) for detecting the position of a piston in the pump, a numerical comparator (28) comparing the numbers emitted by the counter (24) with preset numbers formed by a numerical digital combinator (32) for outputting a reset signal for the memory circuit (36); the memory circuit (36) starts the pump operation when it is set and stops the operation when it is reset.

REFERENCES:
patent: 4277832 (1981-07-01), Wong
patent: 4702674 (1987-10-01), Fontaine et al.
patent: 4797834 (1989-01-01), Honganen et al.

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