Pump rod and connection union for driving rotary petrol pump comprises tapped surfaces at rod free ends and union with threaded ends separated by application shoulders

摘要

The unit comprises a tapped surface at the free ends of the pump rod (3.a,3.b). A union (2) has threaded ends separated by a central zone of larger diameter forming couple application shoulders (2.a,2.b). The external, internal and initial diameters of the couple application shoulders correspond to defined ratios.