Ice water pump

Abstract

A water pump for pumping ice water is provided. The pump includes a motor assembly, a cover, and a tube. The motor assembly includes water pumping blades rotatably set at one end of the motor assembly. The motor assembly includes a water-resistant housing that is set outside and partially encloses the motor assembly. The cover is attached to an end of the water-resistant housing to enclose the motor assembly. The tube extends through the cover to communicate between inside and outside of the cover. Thus, when the pump is positioned in a tank containing ice water, air is allowed to freely flow through the tube between inside and outside of the cover to balance pressures between inside and outside of the pump so as to prevent cracking caused by thermal expansion and contraction from occurring in connection portions of the pump.

1 . An ice water pump, comprising:
 a motor assembly, which has an end at which water pumping blades are rotatably mounted, the motor assembly comprising a water-resistant housing arranged outside and partially enclosing the motor assembly;   a cover, which is coupled to an end of the water-resistant housing to enclose the motor assembly with the water-resistant housing; and   a tube, which extends through the cover and communicates between inside and outside the cover;   wherein when the ice water pump is arranged inside an ice water tank that contains therein ice water, the tube allows air to freely flow between inside and outside the cover to balance pressures inside and outside the pump so as to prevent cracking caused by thermal expansion and contraction from occurring in connection portions of the pump to thus prevent leaking of the ice water into the motor assembly for protection of the motor assembly from damages caused by humidity.   
     
     
         2 . The ice water pump according to  claim 1 , wherein the cover is coupled to the water-resistant housing by water-resistant adhesives. 
     
     
         3 . The ice water pump according to  claim 1 , wherein the cover comprises a sealing block extending therethrough and where the tube extends through the sealing block with water tightness around the tube realized by the sealing block. 
     
     
         4 . The ice water pump according to  claim 3 , wherein the motor assembly comprises electrical wires having ends extending through the sealing block to project outside the cover. 
     
     
         5 . The ice water pump according to  claim 1 , wherein the cover has an opening to which a case is coupled by application of water-resistant adhesives and wherein the case encloses the water-resistant housing and the blades, the case and the water-resistant housing defining a water pumping compartment therebetween, the case forming a water inlet hole corresponding to the blades, the case forming a water discharge section in communication with the water pumping compartment, the water discharge section being connectable to a water pumping tube. 
     
     
         6 . The ice water pump according to  claim 5 , wherein the case has an outer wall forming at least one retention ring, a water intake cap forming a barbed retention tab corresponding to and engageable with the retention ring to secure the water intake cap to the case. 
     
     
         7 . The ice water pump according to  claim 6 , wherein the water intake cap forms fixing holes that receive fasteners to secure the pump at a predetermined location. 
     
     
         8 . The ice water pump according to  claim 6 , wherein the water intake cap forms openings for water flow.