LOAD SENSING VALVE Russian patent published in 1998 - IPC

FIELD: mechanical engineering; transport engineering; automobile pneumatic brakes. SUBSTANCE: load sensing valve has housing accommodating follow-up member dividing housing into inlet and outlet pressure spaces and consisting of piston and diaphragm with variable action area whose central part is secured on piston, and peripheral part, on housing wall. It has also two-seat valve selectively passing compressed air into outlet pressure space or communicating the space with atmosphere and controlled by movable rod sealed in housing. Load sensing valve has also kinematic mechanism and spring. According to invention distance between support surfaces of spring on rod and kinematic mechanism is either equal to or greater than length of spring in free state at any position of kinematic mechanism, no inlet and outlet pressure, position of movable rod corresponding to maximum outlet pressure and closed two-seat valve. EFFECT: enhanced reliability of operation. 4 dwg