METERING DEVICE FOR LIQUIDS Russian patent published in 1995 - IPC

FIELD: liquid metering. SUBSTANCE: with inlet valve open, liquid passes into metering chamber 1 through channels 2 and 6 and radial holes 7. When detachable disk fitted on shaft of adjustable electric drive rotates, disk projection 19, engaging with ball support 21 of larger arm of bell-crank, turns bell-crank around axle 23. Smaller arm of bell-crank, hinge-coupled with shank 5 of rod 4, makes rod move upwards. Radial holes 7 get overlapped by mated surface of metering chamber 1, and shutoff member 8 opens passage for liquid into discharge channel 3 and, through it, into working space of consumer. As length of projection arc is not greater than length of arc of cavity, and passage area of discharge valve is not greater than passage area of inlet valve, chamber 1 gets filled up completely. Branch pipe 16 of horizontal union 11 in discharge channel 3 provides leakproof communication with upper parts of service reservoir and working space of consumer which makes it possible to equalize pressure above liquid level in metering chamber, service reservoir and working space. EFFECT: enhanced reliability, enlarged operating capabilities. 3 cl, 1 dwg