Patent ID: 8878466

Claim:
An electro-mechanical linear actuator unit comprising: an actuator housing ( 5 ) accommodating at least two electric drives ( 6 A, 6 B), each of which, when actuated by a control device ( 2 ) independently of one another sets an associated drive means of a respective spindle drive ( 10 A, 10 B) into rotation so as to bring about a linear adjustment movement of the respective spindle drive ( 10 A, 10 B) and produce relative linear adjustment of a control rod ( 12 ), the at least two electric drives ( 6 A, 6 B) being located in the actuator housing ( 5 ) such that the relative adjustment being produced either by: simultaneous actuation of the at least two electric drives ( 6 A, 6 B), as a sum of the linear adjustment movements of the respective spindle drives ( 10 A, 10 B), or by actuating a single one of the at least two electric drives ( 6 A, 6 B), as the linear adjustment movement of the respective spindle drive ( 10 A, 10 B), in an area of each of the at least two electric drives ( 6 A, 6 B) a respective brake ( 13 A, 13 B) is provided, the brakes being selectively actuated by the control device ( 2 ) to prevent the linear adjustment movement of the respective spindle drive ( 10 A, 10 B), the at least two electric drives ( 6 A, 6 B) each comprising an electric motor ( 7 A, 7 B), having a driveshaft ( 8 A, 8 B), the electric motors are independently actuatable by the control device ( 2 ) to rotationally drive an associated spindle nut ( 9 A, 9 B) of the respective spindle drive ( 10 A, 10 B), and the respective brakes ( 13 A, 13 B), are actuatable independently of each other to selectively engage and arrest rotation of the respective driveshafts ( 8 A, 8 B).