CENTRALIZED LUBRICATION SYSTEM Russian patent published in 1996 - IPC

FIELD: mechanical engineering. SUBSTANCE: centralized lubrication system has delivery pump station with thick lubricant reservoir and two grease mains provided with pressure check valve and piston-type proportioning feeders whose outlets are connected with grease consumers and their inlets are connected with grease mains through at least one piston-type check feeder which consists of state sensors and two-position distributing spool valve with end control chambers which are constantly connected to grease mains and regularly to piston chambers of check feeder; check feeder is provided with two differential cylinders whose rod chambers are constantly interconnected and are connected in turn with end control chambers of distributing spool valve; this spool valve has three lands forming two inter-land chambers; each inter-land chamber may connected in turn inlets of portioning feeders with piston chamber of one of differential cylinders or with reservoir. EFFECT: enhanced reliability. 1 dwg