GUIDE-VANE PUMP Russian patent published in 1999 - IPC

FIELD: various industries for handling liquids in draining and filling operations. SUBSTANCE: pump has housing (or housing with sleeve secured in it) with upper and lower contactors located between edges of suction and discharge ports and described by radius R from center of rotor; rotor is provided with floating radial vanes. Relief section is provided after lower contactor from edge of discharge port in way of rotation of rotor over arc of radius R; central angle of relief section is determined from the following relationship: L= (1.1-1.5)b/R, where B is width of working portion of vane. EFFECT: enhanced reliability and durability of pump. 4 dwg, 1 tbl