Patent ID: 7819642

Claim:
A reciprocatory fluid pump, comprising: a housing; an electromagnet fixed within said housing and defining an air gap; an armature assembly extending through said air gap and magnetically coupled to said electromagnet so as to be reciprocated thereby during the energization thereof; a pumping member mechanically coupled to said armature assembly so as to be reciprocated thereby; and a valve assembly cooperable with said pumping member, said valve assembly having an inlet port through which fluid is inletted and an outlet port through which fluid is outletted upon the reciprocation of said pumping member; characterized in that said armature assembly includes a ferromagnetic member and a pair of spaced permanent magnets mounted thereon for reciprocation by said electromagnet, said permanent magnets being aligned with said air gap of the electromagnet in the non-energized condition of the pump; and in that said armature assembly includes a ferromagnetic member and a pair of spaced permanent magnets mounted thereon for reciprocation by said electromagnet, said permanent magnets being aligned with a said air gap of the electromagnet in the non-energized condition of the pump; and in that said armature assembly is reciprocatably mounted to said housing by a pair of spaced leaf springs extending parallel to each other and fixed at their opposite ends to said armature assembly and housing, respectively, so as to define therewith a four-sided parallelogram in which said pair of leaf springs serve as two parallel sides, and said armature assembly and housing, respectively, serve as the other two parallel sides during reciprocations of the armature assembly.