Air cooled power machine

Internal-combustion engines – Multiple piston – common nonrestrictive combustion chamber – Four-cycle

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Details

123 522, F02B 7526

Patent

active

060793775

ABSTRACT:
The present invention is for the kind of power machine, engines, pumps or compressors which have two or more pistons which work against each other preferably with a common combustion space or corresponding in a stationary cylinder, and where the power is transmitted to or from a rotating motion without an intermediate crankshaft. Independent of whether the machine works as engine, pump or compressor there is a need to cool the cylinder. For applications such as engines for lawn-mowers and power saws the engines must be air-cooled as in practice it is not possible to arrange a water-cooling system. Cooling of the cylinder is obtained by that holes or channels are arranged both in the rotating and the stationary disc and cooling air is made to flow through these channels. In order to further improve the cooling the outside of the cylinder may have flanges. In other embodiments of the invention the connecting means between the rotating disc and the outgoing shaft are so shaped that they also function as fan blades and cause a desired air flow.

REFERENCES:
patent: 4334506 (1982-06-01), Albert

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