SYNCHRONOUS TWIN RECIPROCATING PISTON APPARATUS

摘要

A synchronous twin reciprocating piston apparatus includes a cylinder (12) and a number of stator assemblies (14) mounted in fixed relation thereto. The stator assemblies (14) are constructed so as to generate a radial magnetic field in a number of regions (16) near to each end of the cylinder (12). The apparatus also includes a pair of piston-magnet assemblies (18), each having a piston (20) slidable within an end of the cylinder (12), and a number of compound permanent magnet systems (22) located within the regions (16). Each compound permanent magnet system (22) includes a first section (34) magnetized in a direction radial relative to the cylinder axis and a second section (36), axially displaced from the first, magnetized in the opposite direction. When the stator assemblies (14) are excited with an alternating current, the piston-magnet assemblies (18) reciprocate axially relative to said cylinder (12), and synchronously with the frequency of the applied current. The pistons (18) then generate a pulsating pressure within the cylinder (12).