VACUUM PUMP Russian patent published in 1998 - IPC

FIELD: creation of vacuum; creation of preliminary rarefaction in vacuum systems. SUBSTANCE: diaphragm pinched in housing of cylinder and in piston forms elastic gasket between walls of cylinder and piston. Flexible linkage of piston may be made for vertical reciprocating motion of branch running to piston. Linkage may be thrown through guide roller and its free end may be connected with hinge secured on crank of drive. Valves and linkage are made along axis of symmetry of cylinder. When pump has two housings of cylinders, power requirements are reduced considerably since part of work in raising the piston in one cylinder is performed by piston of other cylinder moving downward by gravity. EFFECT: enhanced reliability. 2 cl, 3 dwg