Patent ID: 9314754
Filing Date: 2016-04-19
CPC Classification: B01F

Claim Text:
1. A stirring device comprising: a magnetics board containing at least two adjacent groups of air core coils; each of said groups of coils having four coils comprising a first pair of two coils and a second pair of two coils; each of said groups of four coils being located beside each other; said two coils in said first pair are wound in opposite directions and energized by a first phase of electrical power, thereby producing oppositely oriented magnetic fields; said two coils in said second pair are wound in opposite directions and energized by a second phase of electrical power, thereby producing oppositely oriented magnetic fields; directly opposing coils from said adjacent groups of coils are energized by the same phase of power and produce a magnetic field oriented in the same direction; a cover having a top surface, said cover being situated above said coils, said cover having an array of pole standoffs arranged such that the air core of each coil contains a portion of one pole standoff, said pole standoffs having a head and a distal end, said heads of said pole standoffs extend through said cover and are flush with the top surface of said cover.