POMPE DE DISTRIBUTION A DIRECTION SELECTIVE

UN ROTOR 40 ACTIONNE PAR UN MOTEUR REVERSIBLE EST MONTE DANS UN LOGEMENT42 ET UN TRAJET FONCTIONNEL APTE A DISTRIBUER DU LIQUIDE PAR ACTION D'UNE POMPE EST FORME ENTRE LA PAROI INTERIEURE DU LOGEMENT42 ET LE ROTOR40. SUR LE COTE DES DEUX EXTREMITES DU TRAJET FONCTIONNEL SONT PREVUES DEUX CHAMBRES A SOUPAPE46, 47 CONTIGUES SEPAREES PAR UNE CLOISON548. A L'INTERIEUR DE CETTE CLOISON EST PREVU UN TRAJET D'INTRODUCTION DE LIQUIDE49 MENANT AUX CHAMBRES A SOUPAPE46, 47 PAR L'INTERMEDIAIRE D'ENTREES50, 51. SUR LA PAROI DE LA CHAMBRE A SOUPAPE46, 47 FAISANT FACE A L'ENTREE S'OUVRE UNE SORTIE ET IL EST PREVU UN CORPS DE SOUPAPE59 QUI OUVRE ET FERME LES ENTREES50, 51 ET LES SORTIES52, 53. An impeller driven by a reversible motor is set in a housing and a functional path capable of sending out liquid by pump action is formed between the inner wall of the housing and the impeller. On the both-end side of the functional path are provided two adjacent valve chambers divided by a partition, and within this partition is provided a liuqid introducing path leading to the valve chambers via inlets. On the wall of the valve chamber facing the inlet is opened an outlet, and a valve body which opens and closes the inlets and outlets is set. The liquid introducing path, one valve chamber, the functional path, and the other valve chamber are arranged in series, so that, while one valve chamber is positive in pressure, the other chamber does not fail to be negative in pressure. Thus, liquid is sent out exactly to the outlet on the positive pressure side, without being erroneously set to the other outlet on the negative pressure side.