POSITIVE-DISPLACEMENT PUMP Russian patent published in 1994 - IPC

FIELD: pumps. SUBSTANCE: drive drum on which a displacing device in the form of a hose is wound is mounted in a sealed chamber with pressure and suction manifolds. The end of the hose is fastened in the chamber. The displacing device is made multilayer and impregnated with polyurethane and has two cloths formed by interweaving warp and weft fibers and interconnected by rows of additional fibers to form parallel channels. The additional warp fibers on channel sections are symmetrically fastened in each layer along the displacement device. The warp fiber density on the channel sections is larger than that on the sections of the rows of additional warp fibers made monofil at least by a factor of 1.5. The displacement device has a system of additional channels made perpendicular to the main channels. EFFECT: improved structure. 3 cl, 5 dwg