Internal-combustion engines with pistons rotating or oscillating with relation to the housing

Child Classifications

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• F02B 2730/01 with one or more pistons in the form of a disk or rotor rotating with relation to the housing; with annular working chamber
• F02B 2730/02 with piston rotating around its axis and having a reciprocating movement in a cylinder
• F02B 2730/03 with piston oscillating in a housing or in a space in the form of an annular sector
• F02B 2730/05 with pistons intermeshing as gear wheels; with helicoidal rotors
• F02B 2730/09 Arrangements or specially formed elements for engines according to the preceding groups