FIELD: engines and pumps.
SUBSTANCE: proportioning pump comprises pump sleeve 3 and case fitted in said sleeve 3 to displace therein. Plunger 1 is arranged in the chamber of said case 2. Sidewall of pump case 2 has flow passage communicated with said chamber. Pump sleeve 3 has air suction channels 9 and air delivery channels 20, openings of air suction channel 9 and air delivery channels 10 extending to inner wall of sleeve 3. Said openings are located at flow path in channel 11 extending to pump case 2.
EFFECT: simplified design, higher accuracy of proportioning.
10 cl, 9 dwg
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