Oscillating vane engine

An internal combustion engine of the oscillating vane-type comprising:

• a cylindrical casing having end walls and a first shaft extending coaxially through the casing and supported for rotation by said end walls, said first shaft extending outward from at least one of said end walls for connection to a power takeoff assembly;
• a second shaft spaced parallel to said first shaft and rotatably mounted on said casing;
• a pair of vanes affixed to said second shaft within said casing, said vanes being in sealed, sliding engagement with the inside surface of said casing and end walls;
• a pair of blocking members extending inwardly from the inside surface of the casing to said second shaft and dividing the interior of said casing into two compartments, each of said vanes variably dividing a compartment into two compression chambers;
• means for cyclically applying and igniting a fuel mixture in each said compression chamber;
• exhaust means for cyclically removing products of combustion from each said chamber;
• a first crank mounted on said first shaft, and a second crank mounted on said second shaft;
• a link pivotally connecting ends of said cranks;
• and
• spring biasing means connected between said second crank and said link and responsive to the position of said first crank for receiving a compressive force from said first crank when said vanes approach the end of oscillating travel and to provide a rotational biasing force to said first shaft, whereby torque is provided to said first shaft directly by a said vane during movement of a said vane and from said spring biasing means to said first shaft when said vanes conclude a stroke.