of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing

Full Title

Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type (with the working-chamber walls at least partly resiliently deformable F04C5/00; rotary-piston pumps with non-parallel axes of movement of co-operating members specially adapted for elastic fluids F04C18/48) > the axes being arranged at an angle of 90 degrees > of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing