LOAD-SENSING VALVE Russian patent published in 2000 - IPC

FIELD: mechanical and transport engineering; pneumatic drives of automobile brakes. SUBSTANCE: known load-sensing valve is provided with housing, follow-up member made in form of piston and diaphragm with variable active area whose central part is secured on piston and periphery part on housing wall and forming in housing at least three spaces, two of which are arranged so that pressures on follow-up member provide efforts of opposite directions on follow-up member, these space being placed in communication with inlet and outlet pressure spaces. It has also double-seat valve mounted on follow-up piston and controlled by movable rod sealed in housing and provided with mechanical coupling with suspension, and correcting device including spring-loaded piston and valve controlled by piston and bypassing compressed air into third space communicating with blind space in housing and/or body of follow-up member. According to invention, volume of blind space does not exceed 30% of third space. EFFECT: enhanced reliability. 2 dwg