Heat exchanger with integral pump

Abstract

A heat exchanger has a housing with a housing cover, in fluid connection with a pump. The pump is arranged integrated into the housing cover. Advantageously, the pump is designed as an impeller pump and the heat exchanger is functionally connected with a drive engine of a watercraft.

I claim:  
     
         1 . In a heat exchanger having a housing with internal passages and a housing cover, the improvement wherein said housing cover includes a pump for circulating fluid through said heat exchanger.  
     
     
         2 . The improvement specified in    claim 1    wherein said pump is an impeller pump.  
     
     
         3 . The improvement specified in    claim 1    wherein said housing cover includes a pump chamber, an inlet opening and an outlet of the pump.  
     
     
         4 . The improvement specified in    claim 1    wherein said housing cover has a first housing cover part defining a pump chamber for accommodating an impeller and a second housing cover part having a bearing housing for a pump shaft.  
     
     
         5 . The improvement specified in    claim 4    wherein said second housing cover part is arranged to be separable from said heat exchanger as a structural unit and includes said bearing housing, an impeller, a pump shaft and a pulley.  
     
     
         6 . A watercraft having a drive engine and a heat exchanger arranged to cool said drive engine, wherein said heat exchanger includes a housing having internal passages and a housing cover, wherein the housing cover includes a pump for circulating water through said heat exchanger, and wherein said heat exchanger is connected to cause said pump to circulate water surrounding said watercraft through said heat exchanger.