Jet pump device

Abstract

A jet pump device includes more than two jet-pump portions formed of discharge nozzles for discharging surplus fuel relieved from a pressure regulator and outlets formed in front of the discharge nozzles. The jet-pump portions are arranged such that the discharge nozzles are situated inside a chamber and the outlets communicate with the chamber. The chamber is provided with a suction path for sucking fuel or air.

1 . A jet pump device comprising: 
 a chamber,    at least two jet-pump portions disposed in the chamber, each of the jet-pump portions having a discharge nozzle for discharging fluid and an outlet situated in front of the discharge nozzle to communicate with the chamber, and    a suction path connected to the chamber for providing the fluid or air.    
   
   
       2 . A jet pump device according to  claim 1 , further comprising a distribution device connected to the discharge nozzles for selectively supplying fluid at least one of the discharge nozzles according to a pressure of surplus fluid.  
   
   
       3 . A jet pump device according to  claim 1 , wherein said discharge nozzle has a conical shape and projects into the chamber, and the outlet has a funnel shape to receive the discharge nozzle with a space therebetween.  
   
   
       4 . A jet pump device according to  claim 3 , wherein said at least two jet-pump portions are arranged parallel to each other with the chamber in common.  
   
   
       5 . A jet pump device according to  claim 4 , wherein said chamber is formed of an upper section having a plurality of said discharge nozzles integrally formed therewith, and a lower section having a plurality of said outlets integrally formed therewith, said upper and lower sections being assembled together.  
   
   
       6 . A jet pump device according to  claim 5 , wherein said suction path is formed of a suction tube integrally formed with the upper section.