SISTEMA PARA CONTROLAR O INTERCAMBIO DE RECIPIENTES VAZIOS E CHEIOS NUMA INSTALACAO DE AUTO-SERVICO DE RECIPIENTES CONTENTORES DE GAS

摘要

The system comprises for each bottle (2) fasteners (5) for a full bottle comprising a first retaining element activated by a first key and a second retaining element for the first key activated by a second key. The first key can only be introduced and extracted when the first retaining element is in the locked position. Fastening elements (6) for the empty bottles are activated by a key separable and extractible only when the fastening means are in the fastening position.