Impeller 1 rotates about fixed axis A and has two symmetrically arranged teeth d. Distributor rotor 2 rotates about fixed axis B and has recess c. The profiles of recess c and of teeth d are made up of portions of cycle curves. When impeller 1 and rotor 2 rotate, fluid (air or liquid) is continuously delivered in the direction of arrows a and b. The suction and discharge chambers are separated by imparting special profiles to teeth d and recess c of the impeller and rotor. The impeller and rotor are driven by two meshing gears keyed to the shafts of impeller 1 and rotor 2. The gears have the transmission ratio • i₁₂=ω₁/ω₂=n₁/n₂=-1/2 where ω₁, ω₂, n₁ and n₂ are the angular velocities and speeds of impeller 1 and rotor 2.
$4005$THP,GP$