AXIAL-PISTON HYDRAULIC MOTOR POWER REGULATOR Russian patent published in 1994 - IPC

FIELD: volumetric hydraulic motors. SUBSTANCE: regulator has control member 1 connected to differential piston 2 located in case 3 through pin 4 in which central hole spring-loaded spool 5 with control shoulder 6 is located. The shoulder is engageable with arm 7 of double-arm lever 8 which axle 9 is fastened in case 3. Spring 12 is engageable with arm 10 of double-arm lever 8. Moreover, the regulator has booster 27 with working chamber 28 mounted opposite to spring 12 of double-arm lever 8 and acting on its arm 10 in the direction which coincides with the direction in which spring 14 of spool 5 acts. Working chamber 28 is continuously connected to the high-pressure line through one of check valves 18, 19. EFFECT: improved reliability and widened scope of functionality. 1 dwg