SUCKER-ROD PUMP AND HOSE CARTRIDGE FOR SAID PUMP Russian patent published in 2014 - IPC F04B43/12 

FIELD: engines and pumps.

SUBSTANCE: sucker-rod pump 1 comprises roller wheel 3 to force fluid through said hose. Hose cartridge surrounds the opening through which roller wheel 3 displaces when hose cartridge 2 is mounted at pump 1 to operating position. Hose cartridge is secured at pump retainer rod to rotate thereabout. Method of fitting hose cartridge 2 with hose h at sucker-rod pump 1 comprises the following steps: a) fitting pump retainer rod 17 in cartridge retainer section 7 of hose cartridge 2; b) turning of said cartridge relative axis A defined by retainer rod 17 unless hose cartridge 2 gets to operating position. Here, retainer rod 19 and fastening bar 15 pass in fact parallel with axis R of roller wheel rotation.

EFFECT: easier assembly/disassembly, higher mechanical stability of proposed assy.

11 cl, 5 dwg