NOVELTY - An oscillating vane machine has a stator with a central axis, main chambers housed in the stator and arranged about the central axis, peripherally pivoted vanes (2) positioned in the main chambers, at least one drive mechanism e.g. a crank rocker, a crank slider with gears, for actuating each of the peripherally pivoted vanes in de-phased fashion, at least one inlet port in fluid communication with each main chamber, and at least one discharge port in fluid communication with each main chamber. The inlet and discharge ports are positioned at one or more external surfaces of the machine.    USE - Oscillating vane machine for use as compressor or expander for working fluids e.g. air, water, multi-phase hydrocarbons, fuels, flowable gases, compressible gases, mixtures. Can also be used in wide range of applications, including e.g. compression, power generation using wind, wave, ocean and river current, solar, and geothermal energy, and power recovery applications using solar, geothermal, radioactive or nuclear and chemical heat sources, as well as commercial process applications e.g. automotive industry, refrigeration applications. Can also be used in e.g. compression and storage of compressed gas, as well as in compression of gases or fluids for storage and electricity generation by harnessing wind, exploiting wind motive force for technologies involving mechanical vapor recompression, producing liquid air or liquid air products, compressing carbon dioxide for sequestration, offshore applications, offshore maritime or marine applications for power or electricity generation. Can also be used in bottoming cycle expanders for power recovery from waste heat of diesel or gas powered engines including micro turbines, back pressure steam expanders for power recovery from district heating or distributed steam pressure reduction, boiler cogeneration expanders and micro cogeneration expanders for recovery of power from waste heat, and chiller expanders for recovery of power from expansion of refrigerant. Can also be used with gas pipelines for electricity generation, such as power recovery from reduction of transmission to distribution pressure, and in micro turbine combined cycles such as power recovery from waste heat of micro turbine fuel combustion. Can also be used in air compression applications such as in pneumatics for tools or machinery, natural gas compression, gas field or well head compression into collection system or compression to transmission pipeline pressure, natural gas regasification and removal of contaminants from natural gas. Can also be used in chemical processes, such as separation processes including air and constituent gas separation.    ADVANTAGE - The oscillating vane machine is optimized for performance and efficiency and for wide range of applications, by reducing loads on drive mechanism and by employing de-phased motion of peripherally pivoted vanes in conjunction with improved porting configurations and valve actuation and manufacture. Use of de-phased actuation vanes, valve actuation, and porting configuration also allows machine to operate at higher speeds with minimum mechanical loads and provide significant increases in flow rate and flexibility. Vane pivot shafts may be located at increased distance from drive mechanism axis to ensure space for larger drive mechanism of favorable geometry capable of transmitting more power to vanes while maintaining reasonable mechanical loads and overall compactness of design. The de-phased actuation of vanes also minimizes pulsation effects in suction and discharge fluid paths and reduces magnitude of torque peaks in drive mechanism.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an integrated vane and shaft assembly for use in an oscillating vane machine.    DESCRIPTION OF DRAWING(S) - The drawing shows the exploded view of an integral vane and shaft for use in an oscillating vane mechanism.    Peripherally pivoted vanes (2)    Seal glands (10)    End caps (11)    Fasteners (12)