BRAKING FOLLOW-UP SERVOMOTOR Russian patent published in 1994 - IPC

FIELD: transport engineering. SUBSTANCE: servomotor has freely fitted-in hollow follow-up piston dividing the servomotor into first and second chambers, spring-loaded control rod acted upon spring of other rod; control rod carries plunger arranged in piston. Rear end of plunger forms first seat of ring valve; first seat is concentric relative to second seat of ring valve which is arranged on follow-up piston. First and second seats of valve engage with ring valve arranged on follow-up piston and exposed to action of valve spring in forward direction. Thrust disk is placed between front ring surface of follow-up piston and rear surface of pushing rod. Spring of ring valve member is installed to thrust against bushing installed for travel along control rod for adjustment of load of spring of ring valve member. Ring valve member has rigid insert with steps in two planes. EFFECT: enlarged operating reliability. 7 cl, 2 dwg