US 12,305,671 B2
Electro-hydrostatic actuator
Jeffery A. Tyler, Newark, NY (US)
Assigned to G.W. Lisk Company, Inc., Clifton Springs, NY (US)
Appl. No. 18/034,249
Filed by G.W. Lisk Company, Inc., Clifton Springs, NY (US)
PCT Filed Nov. 5, 2021, PCT No. PCT/US2021/058306
§ 371(c)(1), (2) Date Apr. 27, 2023,
PCT Pub. No. WO2022/099048, PCT Pub. Date May 12, 2022.
Claims priority of provisional application 63/110,420, filed on Nov. 6, 2020.
Prior Publication US 2023/0392616 A1, Dec. 7, 2023
Int. Cl. F15B 13/044 (2006.01); F15B 1/04 (2006.01); F15B 15/18 (2006.01); H01F 7/16 (2006.01)
CPC F15B 13/044 (2013.01) [F15B 1/04 (2013.01); F15B 15/18 (2013.01); F15B 2211/625 (2013.01); F15B 2211/7052 (2013.01); H01F 7/1615 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An actuator assembly comprising:
a cylinder body having a plurality of passageways;
an accumulator fluidly connected to the plurality of passageways, the accumulator operable to maintain a fluid under pressure and to urge the fluid through the plurality of passageways;
a moveable cylinder fluidly connected to the plurality of passageways, the moveable cylinder operable to move in response to pressure from the fluid; and
a solenoid assembly comprising a core tube, an armature, a first magnet, a second magnet, and an excitation coil, the core tube extending through a longitudinal axis, the core tube having a first ferromagnetic end section and a spaced apart second ferromagnetic end section, the armature having a rod extending through the longitudinal axis, the armature disposed longitudinally between the first ferromagnetic end section and the spaced apart second ferromagnetic end section, the first magnet and the second magnet disposed radially outside the core tube, the first magnet separated from the second magnet by a ferromagnetic spacer, the excitation coil located radially outward from the first and second magnets.