LOAD-SENSING VALVE Russian patent published in 1999 - IPC

FIELD: mechanical engineering; automobile air brakes. SUBSTANCE: proposed load-sensing valve has housing accommodating follow-up member dividing housing into inlet and outlet spaces and consisting of piston and diaphragm with variable active area. Central part of diaphragm is secured on piston, and peripheral part, on wall of housing. Load-sensing valve has also two-seat valve arranged in piston to selectively bypass compressed air into outlet pressure space or placing the space in communication with atmosphere and controlled by movable rod consisting of two movable parts with spring placed in between. According to invention, initial relative position of parts of movable rod is regulated by control mechanism made in form of adjusting screw with threaded joint in indicated movable part or in form of gasket. EFFECT: provision of static characteristic of load-sensing valve which does not depend on variations of tolerances of its component parts. 2 dwg