Great advantage in comparison with the standard comprehessors of rectilinear cylinder with crankcase and oil.

1. Different piston and cylinder, with zero friction betwen them.
2. The piston is much more light.
3. The new mechamism is much more efficient.
4. The inertial resistance of the revulions has been diminished.
5. The volume and total weight of the system have been diminished, improving the weight-energy consumption rate.
6. The contact between the piston and the cylinder has been eliminated.
7. The lubrication between the piston and the cylinder has been eliminated.
8. The axial pressure between the piston and the cylinder has been eliminted.
9. The piston shock and vibration have been eliminated.
10. The resistance of the surface stress of the oil during the sliding movement, has been eliminated.
11. A central and pendular piston have been developed, directed by a bearing during the concentric alternative movement, inside the toroidal cylinder, and without friction.
12. The general performance is arround 8% - 20%, during the electromotive force consumption.
13. The number of turns for air comprehessors is arround 1,400 - 2,800 (r.p.m), and even more.
14. Its 100 % performance is supirior over the special dry piston.
15. In the air comprehessors the variation of 10° more or less, in each half turn of the crakshaft during the air input or compression, is regulated according to the specific working characteristics.
16. In can be used directly coupled to the engine or even with pulleys.
17. The manufacturing process is simple and fast.
18. The equipments have much less maintenance that the standard ones.
19. The equipments have much less manufacturing cost.
20. The maintenance of the rings and long range running berarings change, is easy and fast.
21. The equipmens have less manufacturing and ensambling time.

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