System and device for supplying desired liquid volumes by means of a metering pump in variable flow rate condition
AssigneeTecnolab Snc di Sanna Massimo & C.
InventorSanna Massimo
Life of this patent
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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.
Claims23
A metering vibrating pump, comprising:
- a piston actuated by a movable core moveable in response to the activation of an electromagnet (20);
- a piston position detector (12) and a power amplifier (18) for driving said electromagnet (20);
- an enabling gate (16) between said piston position detector (12) and said power amplifier (18) enabling the driving of said electromagnet (20);
- a microprocessor (290) for carrying out and controlling all the functions of presetting and counting the desired liquid volumes to be supplied by said pump;
- and
- said microprocessor (290) comprising at least an input/output (I/O) port (292), a read only memory (ROM) (294), a random access memory (RAM) (296), an address bus (298), a date transfer bus (299), a central processing unit (CPU) (300), a clock (302, 304), and input and output buses (306, 308) from and to peripheral units, said central processing unit (CPO) being coupled through said input/output (I/O) port to said piston position detector means (12) for counting pulses coming therefrom.
In a metering pump of the vibrating kind for operating in a variable flow rate condition, comprising:
- electromagnet means (20) for displacement of a piston driven by a movable core;
- piston position detector means (12) and power amplifier means (18) coupled with said electromagnet means, and enabling gate means (16) between said piston position detector means and said power amplifier means (18) for driving said electromagnetic means (20);
- memory circuit means (36) coupled with said enabling gate means (16) set by energization starting signal means (38) for said electromagnetic means (20) through said memory circuit means (36) and said enabling gate means (16);
- and
- digital counter means (24) coupled to said piston position detector means (12) for counting pulses coming therefrom;
- and numerical comparator circuit means (28) coupled with said digital counter means (24) and numerical digital combinator means (32) for comparing numbers in digital format coming from said counter means (24) with numbers coming from said numerical digital combinator means (32) for supplying a number corresponding to desired metered volumes;
- said numerical comparator circuit means (28) emitting a resetting signal from said memory circuit means (36) for stopping energization of said electromagnet means (20) when the number appearing at the output of said digital counter means (24) coincides with a number appearing at the output of said numerical digital combinator means (32);
- and
- said memory circuit means (36) further comprising supplementary reset input means (34) for arbitrarily stopping energization of said electromagnet means (20).
Dependencies are inferred from the claim text.