PLANT TESTING MATERIALS FOR LONG-DURATION STRENGTH Russian patent published in 2001 - IPC

FIELD: testing equipment. SUBSTANCE: plant testing materials for long-duration strength has bed frame, cross-pieces, active and passive grippers of specimen, loading mechanism of lever type coupled to passive gripper, limit switches and mechanism keeping load constant that includes lead screw and drive of its movement coming in the form of hydraulic cylinder mounted uniaxially to lead screw and linked to it. Additional active and passive grippers are installed between active gripper and lead screw coupled to it. Additional active gripper is connected to lead screw and additional passive gripper is linked to active gripper of specimen with the help of screw and nut, immobile cross-piece positioned between nut and active gripper of specimen. Separable dynamometer mounted for removal without unloading of tested specimen is located between additional grippers. EFFECT: enhanced accuracy of setting of specified load on tested specimen and its check at moment of test. 1 dwg