Vibration isolating apparatus

Details Vibration isolating apparatus Vibration isolating apparatus

1994-02-10

1995-06-27

Butler, Douglas C.

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

26714015, 267219, F16F 1300

Patent

active

054273617

ABSTRACT:
A vibration isolating apparatus which damps and absorbs vibrations from a vibration generating portion. A first restricting passage, a second restricting passage and a third restricting passage are formed in a block member. Respective transit resistances of these restricting passages are different. One end portion of the first restricting passage is provided so as to be able to communicate with a main liquid chamber, and another end portion communicates with a sub-liquid chamber. One end portion of the second restricting passage is provided so as to be able to communicate with the main liquid chamber, and another end portion has an open portion. One end portion of the third restricting passage communicates with the sub-liquid chamber, and another end portion communicates with the second restricting passage. A rotor is rotated to a first position at which the main liquid chamber and the sub-liquid chamber communicate via the first restricting passage and to a second position at which the second restricting passage communicates with the main liquid chamber. In accordance with the invention, liquid passes through the first, second and third restricting passages, and moves reciprocally between the main liquid chamber and one of the sub-liquid chamber and the second restricting passage in accordance with frequency of vibration. Accordingly, vibrations of a wide range of frequencies can be absorbed.

REFERENCES:
patent: 5310169 (1994-05-01), Kojima

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