Reciprocatory fluid pump

Abstract

A reciprocatory fluid pump includes an armature assembly reciprocatably mounted in a housing and two leaf springs that are connected in parallel at two sides between the armature assembly and the base of the housing to constrain the reciprocations of the armature assembly to transverse displacements, enhancing the pumping efficiency and preventing friction during the reciprocating motion of the ferromagnetic member of the armature assembly, and therefore the reciprocatory fluid pump eliminates energy loss and generation of noises.

1 . A reciprocatory fluid pump, comprising:
 a housing has a base and a sidewall upwardly extended from the border of the base;   an electromagnet fixedly mounted in said housing at a top side and defining an air gap therebelow; and   an armature assembly mounted in a bottom side in said air gap and magnetically coupled to said electromagnet, said armature assembly comprising a ferromagnetic member, two permanent magnets fixedly mounted on a top surface of said ferromagnetic member and two leaf springs shaped like a rectangular open frame and connected in parallel between said ferromagnetic member and the base of said housing at two opposite sides.   
     
     
         2 . The reciprocatory fluid pump as claimed in  claim 1 , further comprising a pumping member disposed at one side of said housing and a valve assembly working with said pumping member, said pumping member being connected to said armature assembly and controllable by said armature assembly to reciprocate. 
     
     
         3 . The reciprocatory fluid pump as claimed in  claim 1 , further comprising a pumping member disposed at one side of said housing and a valve assembly working with said pumping member, said valve assembly defining therein a piston chamber, said pumping member comprising a piston, a link connected between said armature assembly and said piston and a piston ring mounted on the periphery of said piston and kept in close contact with the peripheral wall of said piston chamber and movable with said piston in said piston chamber. 
     
     
         4 . The reciprocatory fluid pump as claimed in  claim 1 , wherein said piston is made of an elastic material. 
     
     
         5 . The reciprocatory fluid pump as claimed in  claim 1 , wherein each said leaf spring comprising a first base portion, said first base portion having a center area affixed to said ferromagnetic member with a fastening member, a second base portion and two arms connected in parallel between two distal ends of said first base portion and two distal ends of said second base portion. 
     
     
         6 . The reciprocatory fluid pump as claimed in  claim 1 , further comprising a frame shell adapted to accommodate said housing, and a plurality of spring members connected between said frame shell and said housing to suspend said housing inside said frame shell. 
     
     
         7 . The reciprocatory fluid pump as claimed in  claim 1 , wherein said spring members each comprise a coil body, a first connection end portion extended from one end of said coil body and connected to said housing and a second connection end portion extended from an opposite end of said coil body and connected to said frame shell.