METERING PUMP Russian patent published in 1995 - IPC

FIELD: measurement technology. SUBSTANCE: for reduction of pressure losses in metering pump with pumping of fluid to user metering pump has cylinder 1 fitted with rotation drive installed in supports 16, current distributor manufactured in the form of cocks 2 and 3 with rotary plugs 4 and 5 on ends of cylinder 1. Dose regulator in the form of mobile wall 6 mounted hermetically inside cylinder 1 and provided with screw drives 17 and 18 is assembled inside inner space of cylinder 1. Cylinder 1 is mounted vertically with ball 7 inserted into it. Ball is used as valve interacting with holes 8 and 9 communicating with cocks 3 and 4 installed in spherical sockets 10 conjugate to conical surfaces 11. Upper hole 9 is made in mobile wall 6, lower hole 8 is drilled in plug 5 of cock. Floating ball shuts off a dose of fluid in cylinder and presents no resistance when cylinder is filled and emptied. EFFECT: facilitated manufacture. 4 dwg