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Vibration isolating apparatus

  • US 6,464,213 B1
  • Filed: 12/20/1999
  • Issued: 10/15/2002
  • Est. Priority Date: 12/24/1998
  • Status: Expired due to Fees
First Claim
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1. A vibration isolating apparatus comprising:

  • a first mounting member connected to a vibration generating portion;

    a second mounting member connected to a vibration receiving portion;

    an elastic body capable of elastic deformation which is provided between the first mounting member and the second mounting member;

    an intermediate plate for partitioning the elastic body into a first elastic piece at the side of the first mounting member and a second elastic piece at the side of the second mounting member cross-sectionally relative to a vertical load from the first mounting member or second mounting member;

    restraining means provided together with the first elastic piece between the first mounting member and the intermediate plate, which restrains movement of the intermediate plate relative to the first mounting means when operated, and allows movement of the intermediate plate relative to the first mounting means when not operated;

    a diaphragm provided between the second mounting member and the second elastic piece;

    a partition wall portion provided inside a space defined by the intermediate plate, the second elastic piece and the diaphragm, such that the partition wall portion divides the space into a pressure receiving fluid compartment at the side of the intermediate plate and a fluid compartment at the side of the diaphragm, the pressure receiving fluid compartment communicating with the fluid compartment by way of an orifice formed in the partition wall portion, wherein the content volume of the pressure receiving fluid compartment is changed by elastic deformation of the second elastic piece; and

    a passage forming member provided inside the fluid compartment, such that the passage forming member divides the fluid compartment into a ring-shaped restricting passage and a fluid sub-compartment as the remaining space of the fluid compartment, the restricting passage communicating with the fluid sub-compartment by way of an orifice formed in passage forming member.

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