US 9,810,341 B2
Actuating device
Norbert Lenz, Celle (DE); and Klaus Biester, Wienhausen (DE)
Assigned to Cameron International Corporation, Houston, TX (US)
Appl. No. 14/783,840
Filed by Cameron International Corporation, Houston, TX (US)
PCT Filed Apr. 9, 2013, PCT No. PCT/EP2013/001044
§ 371(c)(1), (2) Date Oct. 9, 2015,
PCT Pub. No. WO2014/166509, PCT Pub. Date Oct. 16, 2014.
Prior Publication US 2016/0053912 A1, Feb. 25, 2016
Int. Cl. F16K 31/04 (2006.01); F16H 25/20 (2006.01)
CPC F16K 31/047 (2013.01) [F16H 25/2015 (2013.01); F16K 31/048 (2013.01); F16H 2025/2068 (2013.01); F16H 2025/2075 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An actuating device, comprising:
an electric drive comprising at least one torque motor;
a thread drive comprising a threaded spindle and a screw nut, wherein the at least one torque motor is connected to the screw nut in a rotationally-fixed manner and the threaded spindle is axially displaceable to displace a flow control device between an advanced position and a retracted position, and wherein a rotor of the at least one torque motor circumferentially surrounds a hollow shaft, the hollow shaft circumferentially surrounds the screw nut, and the hollow shaft connects the at least one torque motor to the screw nut in the rotationally-fixed manner;
a position detection device configured to monitor an axial position of the threaded spindle; and
a torque control/regulation device configured to control the at least one torque motor based at least in part on the axial position of the threaded spindle.