SHOCK-PROOF SEISMIC DEVICE Russian patent published in 1998 - IPC

FIELD: construction engineering. SUBSTANCE: this relates particularly to erection of antiseismic buildings and structures. Device is made in the form of cylinder with flanges and needle-typo valves and piston with holes in the form of nozzle. Nozzle has cylindrical section in its neck part. Needle-type valves are in sliding contact with neck part of nozzle. Needle-type valve of upper flange is double-stage. Needle-type valve of lower flange creates clearance with nozzle neck. Located on upper flange is flexible hydraulic compensator with recessed corrugations. Above embodiment of device enhances reliability of its functioning. EFFECT: higher efficiency. 1 cl, 2 dwg