公开(公告)号：US3820173A

公开(公告)日：1974-06-28

申请号：US37188573

申请日：1973-06-20

申请人： UWE UNTERWASSER ELECTRIC GMBH

发明人： WELLER E

IPC分类号： E04H4/12 ,  F04D9/00 ,  E04H3/16 ,  E04H3/18

CPC分类号： A63B69/125 ,  E04H4/1245 ,  F04D9/005

摘要： A HOUSING HAS AN UPPER FIRST PORTION ADAPTED TO BE LOCATED ABOVE, AND A LOWER SECOND PORTION ADAPTED TO BE, AT LEAST IN PART, LOCATED BELOW THE LEVEL OF WATER IN A RECEPTACLE. THE SECOND PORTION HAS AN INLET AND AN OUTLET. A PUMP AND A DRIVE FOR THE SAME ARE MOUNTED IN THE FIRST PORTION AND THE PUMP HAS AN INTAKE PORT AND A DISCHARGE PORT. A DISCHARGE CONDUIT IS PROVIDED IN THE HOUSING AND COMMUNICATES WITH THE DISCHARGE PORT AND WITH THE OUTLET. A RESERVOIR IS PROVIDED IN THE FIRST PORTION AND COMMUNICATES WITH THE INTAKE PORT ON A FIRST LEVEL WHICH IS LOWER THAN THAT OF THE DISCHARGE PORT. AN INTAKE CONDUIT IS CONNECTED WITH THE INLET AND COMMUNICATES WITH THE

RESERVOIR ON A HIGHER SECOND LEVEL SO THAT THERE WILL ALWAYS BE A QUANTITY OF WATER RETAINED IN THE RESERVOIR INTERMEDIATE THE LEVELS, IRRESPECTIVE OF THE OPERATING CONDITION OF THE CIRCULATOR, SO THAT THE PUMP IS SELF-PRIMING.