Actuating device with electronic control for injectors of liquid mixers
AssigneeCentro Nazionale Delle Richerche
InventorsPaolo Papoff, Basilio Morelli, Dante Guidarini
Life of this patent
Estimating the term…
Abstract
An actuating device comprising injectors connected with chambers for liquids to be mixed and with analyzer members by means of switchable shut-off members. Movable assemblies of the injectors are kinematically connected with a common keeper acted upon by one or two electromagnets. The device is equipped with means to modify the displacement speed of the keeper and hence the liquid mixing speed, by the use of a special electronic control circuit that energizes the electromagnet or magnets at varying speeds.
Claims12
A device for actuating injectors of liquid mixers of the type used in chemical/physical analysis, in particular according to the so-called stopped-flow method, for treating small amounts of the liquids in the range of a few cubic centimeters, comprising, in combination:
- dual injector devices having pistons that are operatively connected, by the intermediary of connecting means, the latter including a keeper of at least one electromagnet for simultaneous operation, while chambers of corresponding cylinders are selectively connectable, through a commutable intercepting member, with feeding conduits for the liquids to be mixed, and with at least one mixing chamber;
- and electronic control means for feeding an electric supply voltage to said at least one electromagnet, which voltage has a stepwise controllable value and duration.
Dependencies are inferred from the claim text.