Rotary device having a circular guide ring

A rotary device for use with a fluid, the rotary device comprising:

• a housing having a tubular surface and an end surface, the tubular surface defining a tubular volume, the end surface including a channel defining a circular cam path;
• a rotor disposed within the tubular volume for rotation about a first axis, the rotor having an outer surface disposed about the first axis, the outer surface defining a plurality of slots and a first radius of curvature;
• a ring disposed within the channel and including at least one arcuate slot having an inner surface and an outer surface, the inner surface defining a second radius of curvature greater than the first radius of curvature, the ring being concentric to the cam path and configured to rotate about a second axis radially offset from the first axis;
• and
• at least one vane associated with one slot of said plurality of slots, wherein a pin of said at least one vane is configured to move within said at least one arcuate slot.

A rotary device for use with a fluid, the rotary device comprising:

• a housing having a surface defining, in part, a volume, the housing segregated into at least first and second zones;
• a hub mounted for rotation about a rotation axis, the hub mounted within the volume and having a plurality of hub slots and an outermost radially spaced surface distance;
• a ring at least indirectly coupled to the housing and including at least one arcuate slot having an inner surface and an outer surface;
• and
• at least one vane associated with one hub slot of said plurality of hub slots, said at least one vane configured to rotate within the tubular volume and connected at least indirectly to said ring at a distance that is greater than said radially spaced surface distance wherein a pin of said at least one vane is configured to move within said at least one arcuate slot between said inner surface and said outer surface.