Apparatus for dosing a constant quantity of fluid into an analys

Details Apparatus for dosing a constant quantity of fluid into an analys Apparatus for dosing a constant quantity of fluid into an analys

1976-07-08

1977-05-17

Tollberg, Stanley H.

Dispensing

Simulations

Firearms

222318, B67D 508

Patent

active

040237095

ABSTRACT:
In an apparatus for the discontinuous dosing of a constant quantity of fluid into an analysis device, the fluid feed system is connected by means of a three-way valve on the one hand via the dosing valve and a shut off valve arranged downstream and on the other hand via a by-pass to the fluid discharge system. A compressed air source for the production of a constant air pressure is connected between the three-way valve and the dosing valve. All the components of the system are controlled by a programme control unit, so that the fluid flow through the dosing valve is temporarily interrupted by closing the shut off valve and switching over the fluid feed to the by-pass and at the same time releasing the connection of the compressed air to the dosing valve. Thereafter the compressed air source is switched off by the control unit and the interruption of the fluid flow at the dosing valve is cancelled.

REFERENCES:
patent: 3885739 (1975-05-01), Tuttle

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