Internal-combustion engines having a cylinder and working piston reciprocating therein, but irrespective of other structural features, cycle, or mode of operation, in which the working cylinder partakes of an oscillatory motion about a fixed axis as the piston reciprocates therein.
SEE OR SEARCH CLASS
91, Motors: Expansible Chamber Type,
176, and 210+ for expansible chamber motors of the oscillating cylinder type.
92, Expansible Chamber Devices,
118+, for an expansible chamber device having an oscillating cylinder.
