PUMP Russian patent published in 2017 - IPC F04B15/00 F04B53/10 F16K1/42 

FIELD: engines and pumps.

SUBSTANCE: pump comprises a housing with a discharge manifold and a suction cavity, and a drive. In the housing one opening is made to install one cylinder secured in the hole with possibility of its fixation. Inside the cylinder a piston is located, forming working and rod cavity, the piston is connected with rod having a collar and passing through central hole in the bottom of the cylinder. A suction valve is made as insert enclosing the piston with manhole, and installed in the cylinder forming a ring channel with guide inserts in the bottom and middle parts of the cylinder. Coaxial to the suction and discharge valves, between them, a detachable saddle is mounted, including an upper, middle and lower rings. Annular recesses are made in the middle ring, forming collars, wherein the upper and lower rings are mounted to form annular grooves. In the grooves, which base's width is greater than the width of their opening at the inlet, sealing elements are installed.

EFFECT: increased tightness of the valves while reducing the labour hours of their maintenance.

6 cl, 6 dwg