US 12,135,018 B2
Method and systems for positive displacement of an actuation device
Harold Brian Skeels, Houston, TX (US)
Assigned to FMC Technologies, Inc., Houston, TX (US)
Appl. No. 18/261,582
Filed by FMC Technologies, Inc., Houston, TX (US)
PCT Filed Jan. 12, 2022, PCT No. PCT/US2022/012093
§ 371(c)(1), (2) Date Jul. 14, 2023,
PCT Pub. No. WO2022/155182, PCT Pub. Date Jul. 21, 2022.
Application 18/261,582 is a continuation of application No. 17/150,004, filed on Jan. 15, 2021, granted, now 11,274,664.
Prior Publication US 2024/0084789 A1, Mar. 14, 2024
Int. Cl. F03G 7/06 (2006.01)
CPC F03G 7/065 (2013.01) [F03G 7/0614 (2021.08)] 21 Claims
OG exemplary drawing
 
1. An actuation device comprising:
a plurality of actuation units disposed about an axis, each actuation unit of the plurality of actuation units comprising:
a shape memory alloy component configured to be actuated;
an auxetic material component operationally coupled to the shape memory alloy component, and
a power source operationally coupled to the shape memory alloy component, and
a control system operationally coupled to the power source of each actuation unit, wherein the control system is configured to actuate the shape memory alloy component by way of the power source,
wherein the control system is configured to control an actuation speed of the shape memory alloy component of each actuation unit by controlling a level of power introduced to the shape memory alloy component with the power source of an associated actuation unit.