ROTARY PISTON PUMP Russian patent published in 2002 - IPC

FIELD: mechanical engineering; pumps. SUBSTANCE: invention relates to design of rotary pumps with cylindrical working chamber and rotor with swinging working members. Pump housing, in its middle part, is made in form of cylindrical working chamber with side covers accommodating rotor consisting of four kinematically intercoupled pistons with curvilinear surface, rotor drive mechanism with two coaxial shafts, each coupled with rotor through double-arm lever. Each piston is made in form of angle piece made up of side wings conjugated at angle whose generating line is drawn over arc of circumference. Top of each piston is pointed to chamber surface and is hinge-coupled with shaft levers. Ends of pistons are hinge-coupled to each other and to piston drive mechanism by means of two connecting rods, and tappet in form of fork with guide slots for sliders. Tappet has rollers for rolling over curvilinear surface of cam made symmetrical with cavity in middle part. EFFECT: improved operation reliability of pump. 5 dwg