Patent ID: 8272850

Claim:
An electromagnetic driven membrane pump for fluids, comprising a pump housing inside which at least one pump chamber ( 15 ) is formed with at least one intake and at least one outlet, said pump chamber ( 15 ) formed and delimited between a gable ( 1 ) of the pump housing and a membrane ( 14 ) attached to a wall ( 4 ) of the pump housing to form a seal, said membrane ( 14 ) attached to an axle ( 13 ) running in an axial direction of the pump housing, said running axle ( 13 ) suspended in at least two separated suspensions in a longitudinal direction of the axle ( 13 ), at least one of said suspensions being a flat spring ( 9 ) attached to the axle ( 13 ) and running in a radial direction out toward and attached to the wall ( 4 ) of the pump housing, said axle ( 13 ) being partly or entirely composed of, including or carrying a magnetic material to be driven by a magnetic field from an electromagnet ( 7 ) mounted on and within the pump housing for oscillation in its longitudinal direction and moving said membrane ( 14 ) in a corresponding oscillating movement, wherein said flat spring ( 9 ) is composed of an inner ring-shaped part attached around to said axle ( 13 ) extending through an inner opening of said spring ( 9 ) by attachment means ( 10 ) and an outer ring-shaped part attached to the pump housing wall ( 4 ) around a continuous outer circumference thereof, and said inner and outer ring-shaped parts being fixed to and interconnected with one another by at least three separated, circumferentally-extendinq elastic legs arranged around a point where said spring ( 9 ) is attached to said axle ( 13 ) extending therethrough by said attachment means ( 10 ).