Water pump for internal combustion engine

专利名称：Water pump for internal combustion engine发明人：Shizuo Shimanuki,Yoshitomo

Nakai,Masamichi Itakura

申请号：US07/733868申请日：19910722公开号：US05188509A公开日：19930223

摘要：A water pump for an internal combustion engine includes a body, a driving shaftheld rotatably in the body, an impeller fixed on the driving shaft, a volute chamberformed in the body and including a deflecting portion adapted for introducing a coolantto an outlet port, a chamber formed in the body on a back side of the impeller andincluding an inner circumferential portion and an outer circumferential portion, and atleast two ribs disposed so as to connect the inner circumferential portion and the outercircumferential portion of the chamber, one of the ribs disposed adjacent to the

deflecting portion of the volute chamber, whereby inibiting foreign matters contained inthe coolant from being left in a space formed between the inner circumferential portionand the outer cicumferential portion of the chamber. When foreign matters arecontained in the coolant and when the foreign matters intrude into the chamber, theforeign matters collide with the ribs. The ribs immediately evacuate the foreign mattersback to either the volute chamber or the outlet port by way of an outlet passage. Thus,the foreign matters are not kept to circulate in the chamber, and accordingly the erosionof the body can be inhibited from happening.

申请人：AISIN SEIKI KABUSHIKI KAISHA,TOYOTA JIDOSHA KABUSHIKI KAISHA

代理机构：Oblon, Spivak, McClelland, Maier & Neustadt

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