US Patent:
20170241246, Aug 24, 2017
Inventors:
- East Aurora NY, US
Carl Deirmengian - Media PA, US
Brian Williams - Norwood PA, US
David P. Cardamone - Lansdale PA, US
John C. Layer - East Aurora NY, US
International Classification:
E21B 43/12
F04B 19/22
H02K 5/132
H02K 41/03
H02K 1/34
H02K 1/14
F04B 47/06
F04B 17/03
Abstract:
A linear actuator for pumping comprising a stator having an inner opening, a shaft having a plurality of permanent magnets spaced linearly in the axial direction, the shaft disposed in the stator opening and configured to reciprocate linearly in the axial direction relative to the stator, the stator comprising a first stator assembly having a plurality of pole sections spaced linearly in the axial direction and a plurality of coils disposed therebetween, a second stator assembly having a plurality of pole sections spaced linearly in the axial direction and a plurality of coils disposed therebetween, a bearing assembly positioned axially between the first stator assembly and the second stator assembly, and the bearing assembly having a width that is a function of the spacing of the plurality of pole sections of the first stator assembly and the second assembly and the spacing of the plurality of permanent magnets of the shaft.
