PUMP Russian patent published in 2018 - IPC F04B15/00 

FIELD: motors and pumps.

SUBSTANCE: invention relates to devices for pumping dense liquids with abrasives, in particular piston pumps. Pump contains a housing with a discharge manifold and a suction cavity and a drive. Casing has at least one hole for at least one cylinder, fixed in the hole with the possibility of fixing it by means of a detachable connection. Inside the cylinder, with the formation of the working and rod cavities, a piston is placed. Piston is connected to a rod provided with a collar and passed through a central hole in the bottom of the cylinder. Stem is provided with an abutment, and the collar is in the form of a sleeve with the possibility of limited axial movement along the rod and is spring-loaded to the stop.

EFFECT: closing delay of the suction valve is reduced and the excessively low pressure in the rod cavity is eliminated.

4 cl, 6 dwg