ADJUSTABLE THROTTLE VALVE Russian patent published in 2002 - IPC

FIELD: manufacture of fittings; delivery of gas at preset flow rate at known temperature and pressure; temperature control and gas supply systems. SUBSTANCE: proposed adjustable throttle valve has body with hole for passage of gas, damper in body guides, damper drive and scale. Mechanical calculator graduated in units of flow rate is introduced between damper and scale. Mechanical calculator consists of body, rectangular lever having angle of 90 deg. between arms and two rules: one rule bears flow rate scale and other rule bears pressure scale. Vertex of right angle of rectangular lever is articulated to pusher which is connected with damper. One arm is in contact with pin performing function of axle of rotation of rectangular lever simultaneously sliding in groove of body. Other arm is pressed to stop; point of contact lies in one axis with groove and axis of groove is perpendicular to direction of motion of right angle of rectangular lever. One arm of rectangular lever is pressed to stop of rule bearing the pressure scale. Other arm has longitudinal notch which is indicator of flow rate scale. Rule bearing the flow rate scale is movable relative to pressure scale and is perpendicular to it. EFFECT: ease in operation; enhanced accuracy of setting required flow rate. 4 cl, 3 dwg