HYDROVACUUM DRIVE OF BRAKES FOR TRANSPORT FACILITY WITH TRAILER, TYPE CBC-5 Russian patent published in 1995 - IPC

FIELD: braking devices of transport facilities. SUBSTANCE: drive of brakes for transport facility with trailer has trailer brake control valve which is arranged on tractor and is connected to suction manifold of tractor engine by means of vacuum line through check valve and disconnecting cock 11. Cock 11 is provided with hollow plug 15 hermetically fitted in housing for axial motion. Arranged in plug 15 is spring-loaded plate 16 of check valve resting on seat 17 located on side of branch running to control valve. Secured in bottom of plug is rod 18; bottom has through holes 20 which are in communication with outlet hole 21 when cock 11 is in open position; hole 21 is provided in wall of housing 14 and is used for connecting the cock to suction manifold. Ratio of area S₁ of cross section of plug 15 to area S₂ of cross section of rod 18 ranges between 4,5 ≅ S₁/S₂ ≅ 5,5. EFFECT: enhanced reliability. 2 dwg