CALIBRATION DEAD-WEIGHT PRESSURE-GAUGE TESTER Russian patent published in 2002 - IPC

FIELD: measurement technology, tests of operational pressure standards and standard manometers. SUBSTANCE: device forming pressure in calibration dead-weight pressure-gauge manometer is equipped with adjusting supports which regulate base of device in horizontal plane. Pump is fitted with valve that limits action of additional pressure of working medium on pump. In this case pump piston is located in horizontal plane, capable of reciprocating motion via tie-rod linked to handle. Needle valves are fitted with cardan turning joint. Platforms carrying dead-weight pairs are provided with at least three adjustment supports which include screw with spherical head, washer in the form of sphere, nut and flywheel or platforms carry rounded bushings into which screws are installed with clearance. At point of touch with bushing screws form angle of 45 deg. Screw carries adjustment unit comprising flywheel and nut resting with its butt against platform. Cardan turning joint of needle valve is made of cardan roller of driving axle linked to flywheel of valve and driven axle-needle of valve. Cardan roller is anchored on driving and driven axles with the help of lockpins. EFFECT: simplified design of tester, improved functional characteristics of adjustable support. 3 cl, 5 dwg