Rubber bearing device having air damping capacity

摘要

A rubber bearing device having air damping capacity which comprises upper and lower fitments; a rubber cylindrical body interposed between the fitments defining an air chamber capable of volume-changing; a rubber piston shaped body whose shaft is fitted hermetically in the cylindrical body and is firmly bonded to the upper fitment, said piston-shaped body being provided in the air chamber to divide it into upper and lower air chambers, said upper and lower air chambers being adapted to release air therefrom or to admit air thereto through an orifice; and a depression diaphragm member provided associating with one or both of the chambers, said diaphragm member being capable of decreasing the magnitude of effective volume change by a definite magnitude.