US 11,680,658 B2
Linear actuator with a coupling
Kurt Harck, Sonderborg (DK); Hongmei Deng, Sonderborg (DK); Birthe Nissen Reese, Nordborg (DK); Jens Pawlik, Broager (DK); Sigurd Larsen, Hamburg (DE); and Detlef Matzen, Aabenraa (DK)
Assigned to Danfoss A/S, Nordborg (DK)
Appl. No. 15/781,754
Filed by Danfoss A/S, Nordborg (DK)
PCT Filed Dec. 6, 2016, PCT No. PCT/EP2016/079904
§ 371(c)(1), (2) Date Jun. 6, 2018,
PCT Pub. No. WO2017/097770, PCT Pub. Date Jun. 15, 2017.
Claims priority of application No. 15198334 (EP), filed on Dec. 8, 2015; and application No. PA201600169 (DK), filed on Mar. 21, 2016.
Prior Publication US 2018/0363797 A1, Dec. 20, 2018
Int. Cl. F16K 31/04 (2006.01)
CPC F16K 31/047 (2013.01) 17 Claims
OG exemplary drawing
 
1. A linear actuator comprising:
a first part arranged to rotate along with a rotating part of a stepper motor,
a second part arranged to drive an actuated part, and
a coupling interconnecting the first part and the second part to allow the second part to rotate along with the first part at the same angular velocity as the first part, the coupling defining a fit tolerance between the first part and the second part wherein the first part rotates an angular degree of rotation in the range of 0.15-2 full steps of the stepper motor before engaging the second part and rotating the second part along with the first part.