Pulse controlled linear actuator

Pulse controlled linear actuator comprising a working cylinder for receiving a medium introduced through a valve system by a compressor/pump, a piston moving freely in the working cylinder, the piston shank of the piston represents the output of the actuator characterized in that said actuator further comprises a central solenoid (1) and positioned at least above and under said central solenoid (1) upper and lower iron cores (3) are arranged in pairs which are moved alternately by means of said central solenoid (1) and by means of upper and lower solenoids (2) which are arranged in pairs, said central solenoid (1) and said iron cores (3) are arranged between said upper and lower solenoids (2), said iron cores (3) form the compressor/pump having two separate medium spaces (14, 15), from the space being between said upper and lower iron cores (3) said first medium space (14) is led through a first inlet (4a) of an upper controlled dual inlet valve (4) into the portion of said working cylinder (9) which is above said piston (10), and in addition it is led through a first inlet (8a) of a lower controlled dual inlet valve (8) into the portion of said working cylinder (9) which is under said piston (10);

• the second medium space (15) is separated from the space being between said upper and lower iron cores (3) by said iron cores (3), and is led through a second inlet (4b) of said upper controlled dual inlet valve (4) into the portion of said working cylinder (9) which is above said piston (10), and in addition it is led through the second inlet (8b) of said lower controlled dual inlet valve (8) into the portion of said working cylinder (9) which is under said piston (10);
• and said upper and lower controlled valves (4, 8) are counter-phase or phase pulse controlled.