OSCILLATION DAMPER Russian patent published in 2000 - IPC

FIELD: mechanical engineering; oscillation dampening devices. SUBSTANCE: oscillation damper has hollow housing filled with liquid, rod with piston dividing the housing into two parts and having holes for overflow of liquid. Flexible members-bellows tightly connect piston with housing. Device is provided with additional sealing bellows; axes of bellows and through holes are mutually perpendicular. Hollow piston is provided with slots; each slot holds movable blank which changes degree of passage area in through holes; it is rigidly connected with cover of respective additional bellows. Cover is secured on one end face of bellows; other end face is connected with inner surface of piston. Fitted rotatably inside hollow piston is cam whose profile surface is connected with covers of additional sealing bellows. EFFECT: enhanced efficiency of vibration protection due to change in sizes of holes for overflow of liquid. 2 dwg