HYDRAULIC VALVE FOR BRAKE Russian patent published in 1997 - IPC

FIELD: hydraulics. SUBSTANCE: hydraulic valve has housing 1 sleeve 2 received in the bore of the housing, and slide valve 8 mounted in the sleeve and spring-loaded by spring 7 from one end face. The other end face of the slide valve form control space 18 together with the housing. The axial passage of slide valve 8 is provided with check valve 13. Between openings 3 and 4 of supplying-discharging the inner side of sleeve 2 and outer side of sleeve 8 define throttle 17. End face cover 8 has adjusting screw 25 for adjusting throttle 17. Piston 22 is mounted in plug 26 and defines above-piston space 27 connected with chamber 2 through throttle opening 31. The chamber is provided with filter 23. Axial periphery passages 29 and radial throttle passages 30 connect above-valve space 15 with throttle 17 and above-piston space 27. Additional check valve 24 is parallel to additional throttle 21 that connects control space 18 with opening 20. EFFECT: enhanced reliability. 1 dwg