Reciprocating valveless pump

Claim 1

A valveless pump comprising a housing, said housing including magnetic means for generating a magnetic field disposed within an outer chamber of said housing, said outer chamber surrounding and being closed from an inner chamber of said housing, said housing being provided with a lower extending hollow member communicating with said inner chamber, closure means closing a lower end of said hollow member, said hollow member being provided with at least one water-inlet opening in a side wall of said hollow member for providing a flow of water to said inner chamber, a tubular outlet member extending through said inner chamber with an open end of said outlet member disposed in said hollow member above said water-inlet opening, a water-ejecting magnetically responsive hollow piston movably disposed in said hollow member for association with said magnetic means with an upper portion of said piston slideably surrounding said outlet member in a concentrical arrangement, said piston including a lower end portion facing said closure means, said piston lower end portion being provided with a water-ejecting opening of smaller size than said upper piston portion which surrounds said outlet member, and at least one opEning in a side wall of said piston communicating with each of said water-inlet opening, said outlet member open end and said water-ejecting opening, whereby said water-ejecting opening directs jets of water toward said outlet member open end as said magnetic means force said piston toward said closure means when said hollow member is disposed in water with said water-inlet opening submerged below water level where said piston side wall opening permits said hollow member to be constantly filled with water.