EINRICHTUNG FUER DIE HERSTELLUNG BESTIMMTER KONZENTRATIONEN GASFOERMIGER STOFFE SOWIE ZUM MISCHEN VERSCHIEDENER GASFOERMIGER STOFFE IN EINEM VORGEGEBENEN VERHAELTNIS

摘要

PCT No. PCT/DE88/00282 Sec. 371 Date Feb. 7, 1989 Sec. 102(e) Date Feb. 7, 1989 PCT Filed May 13, 1988 PCT Pub. No. WO88/08743 PCT Pub. Date Nov. 17, 1988.An apparatus for the producton of particular concentrations of gaseous materials as well as for mixing different gaseous materials in a specified ratio in which the gaseous materials are supplied from different sources in pulsed fashion to at least one common outlet. The gaseous materials are passed through a valve which has n inlets and m outlets, n and m being whole numbers. This valve can connect at least one inlet for a specifiable time with a particular outlet. The valves are controlled preferably by a pulse-width modulated method, for example by means of a microprocessor. A gas pump is connected downstream from the common outlet.