with coaxially-mounted members having continuously-changing circumferential spacing between them

Full Title

Rotary-piston machines or engines (with axes of co-operating members non parallel F01C3/00; with the working-chamber walls at least partly resiliently deformable F01C5/00; with fluid ring or the like F01C7/00; rotary-piston machines or engines in which the working fluid is exclusively displaced by, or exclusively displaces, one or more reciprocating pistons F01B13/00) > of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents > with coaxially-mounted members having continuously-changing circumferential spacing between them

Child Classifications

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• F01C 1/067 having cam-and-follower type drive
• F01C 1/07 having crankshaft-and-connecting-rod type drive
• F01C 1/073 having pawl-and-ratchet type drive
• F01C 1/077 having toothed-gearing type drive