Patent ID: 6992408

Claim:
In a linear drive device comprising a stator and an armature able to be moved linearly in relation to the stator and an electrodynamic linear direct drive system, composed of two drivingly cooperating drive means in the form of a coil means having a plurality of coaxially sequentially arranged drive coils and of a magnet means with one or more axially sequentially arranged permanent magnets, of which the one is arranged on the stator and the other is arranged on the armature and by which the armature may be subjected to a first setting force, the invention which resides in the provision of an additionally present fluid power drive system adapted to provide for fluid actuation of the armature for the production of a second setting force independent from the first setting force, and wherein the stator further includes a peripheral wall defining a receiving space in which a drive output part of the armature is arranged for linear movement, said peripheral wall having a longitudinal slot extending through it radially, such slot extending in the longitudinal direction in the receiving space, such slot furthermore having a force output member extending through it and being sealed in a fluid-tight manner on either side of the force output member by at least one sealing tape, and wherein the drive means on the stator side of the linear direct drive system is a component of a stator rod extending between the terminal portions of the receiving space and through the drive output part, the stator rod being surrounded by the drive output part in a sliding manner and with a seal.