Pump and/or Compressor Arrangement Including Mating, Oscillatable Vane Members for the Simultaneous Admission and Discharge of Fluid

An assembly for translating rotational motion of an input shaft into oscillatory motion of first and second mating vane members used to pump and/or compress fluid by virtue of said motion, the assembly including:

• a first swing arm and a second swing arm disposed forwardly and rearwardly of said first and second mating vane members respectively, wherein each swing arm and vane member includes a co-axial opening for accommodating the input shaft, and each swing arm is pivotable about a common pivot axis disposed above the input shaft axis;
• eccentric cams associated with the input shaft and arranged such that each eccentric cam contacts an internal edge of the swing arm openings to thereby effect a pendulum type motion of the swing arms about said common axis when the input shaft is rotated, said cams being arranged in a radially opposed configuration such that rotation of the input shaft causes the swing arms to move in equal and opposite directions;
• and
• lever arms associated with each swing arm configured to move substantially in unison with the swing arms by virtue of a pivotable connection at their respective lower ends, the upper ends of each lever arm being rotatable about the driveable shaft axis and operatively coupled to said first and second vane members to effect equal and opposite rotational oscillation thereof.