Built-up piston

Expansible chamber devices – Piston – Open-ended hollow skirt type

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F16J 104

Patent

active

046141502

ABSTRACT:
A built-up piston in which the piston top (11) and piston bottom part (13) are clamped together by two necked-down bolts (15) by means of nuts (16). The nuts include an extension (21) having an external thread (22), by means of which they are screwed into the piston bottom part (13). An oil scraper ring (14) is arranged between piston top (11) and piston bottom part (13) so that leakage oil out of the cooling oil channel of the piston is conducted back into the crankcase by way of the oil discharge channels of the annular groove of the oil scraper ring.

REFERENCES:
patent: 1778064 (1930-10-01), Calkins
patent: 4548127 (1985-10-01), Dunn et al.

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