Flexible hose pump

摘要

PCT No. PCT/SU86/00139 Sec. 371 Date Jul. 27, 1987 Sec. 102(e) Date Jul. 27, 1987 PCT Filed Dec. 19, 1986 PCT Pub. No. WO87/03936 PCT Pub. Date Jul. 2, 1987.A pump comprising a casing (1) having interior space in which there is provided a flexible hose (2) mounted for reciprocations having one end (5) thereof which is turned inside out and secured along the perimeter to the inner wall of the casing (1), and the other end thereof which is closed so as to sealingly divide the interior space of the casing (1) into two chambers (6,7) of which one chamber (7) communicates with a source (12) of fluid being pumped and with a delivery line. In order to move the flexible hose (2) in one direction, its closed end is secured to a drum (3) operatively connected to a motor and installed in one of the chambers (6,7), and movement in the opposite direction is effected under the action of working fluid pressure built-up in one of the chambers (6,7).