METHOD OF INCREASING SERVICEABILITY OF AIR-AND-SPRING OPERATED PACKING BRAKE Russian patent published in 2014 - IPC B60T13/68 B60T15/36 B61H11/02 

FIELD: transport.

SUBSTANCE: invention relates to railway transport, particularly, to rolling stock braking equipment. Proposed method consists in that pressure in brake line controls air pressure control valve communicated with the valve space tank. Air pressure control valve fills brake cylinder working chamber with compressed air from space tank and communicated the latter with atmosphere. Parking brake cylinder and standard brake cylinder are arranged separately to allow forces at cylinder piston rods act to brake leverage, or said cylinders are coupled. But in this case said action is transmitted from parking brake cylinder piston rod to brake cylinder piston via its rod. Parking cylinder body has extra channel and check valve. Said extra channel is communicated via extra check valve with existing extra duct of parking cylinder body and, besides, extra channel communicates with switch valve body. Another inlet of the latter communicates with brake cylinder piston working chamber. Switch valve outlet is directly communicated with parking brake cylinder standard inlet.

EFFECT: higher operating reliability of parking brake.

10 dwg