HEAD OF HOLLOW PUMPING ROD Russian patent published in 2010 - IPC F04B47/00 E21B17/00 B21K21/12 

FIELD: engines and pumps.

SUBSTANCE: head of hollow pumping rod includes external shoulder 1 of the specified geometrical shape and "ready-to-operate" place 2 adjacent to it, which is made in the form of hexagon. External shoulder 1 is arranged so that there can be used metal process ring 3 pressed into cavity of head in the area of shoulder and with the shape of external surface, which is similar to the shape of the above shoulder. Inner diametre of ring 3 corresponds to diametre of cylindrical cavities of head, which are located on both sides of that ring.

EFFECT: providing the possibility of manufacture with pressure shaping operations without defect formation processes with minimum metal consumption of the technology.

1 dwg