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1. (WO2018011185) METERING MECHANISM FOR A PROPORTIONING PUMP, AND ASSOCIATED PUMP AND USAGE METHOD

Pub. No.:    WO/2018/011185    International Application No.:    PCT/EP2017/067354
Publication Date: Fri Jan 19 00:59:59 CET 2018 International Filing Date: Wed Jul 12 01:59:59 CEST 2017
IPC: F04B 9/103
F04B 13/00
F04B 49/18
F04B 13/02
Applicants: DOSATRON INTERNATIONAL
Inventors: DUQUENNOY, Philippe
MAHIEUX, Richard
Title: METERING MECHANISM FOR A PROPORTIONING PUMP, AND ASSOCIATED PUMP AND USAGE METHOD
Abstract:
The invention relates to a metering mechanism (D) comprising a metering element (10) that is translatably mounted in a jacket (3), the jacket being mounted in an adjusting sleeve (4) that can cooperate with the jacket by way of a screwing movement, the screwing/unscrewing movement causing a translatory movement of the metering element; at one end, the metering element is provided with a check valve (11), and at the other end, same accommodates a plunger (9), the reciprocating translatory movement of which creates suction at the end of the element provided with the valve (11), followed by expulsion into a volume (V) surrounding the other end of the metering element via a passage formed in at least one first sealing device (J91; J1) and in a second sealing device (J93). The invention also relates to a proportioning pump comprising a metering mechanism of said type as well as to a method for using a pump of said type in at least two metering ranges.