CPC F16K 31/047 (2013.01) | 17 Claims |
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.
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