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Base isolation pad

  • US 4,887,788 A
  • Filed: 01/15/1988
  • Issued: 12/19/1989
  • Est. Priority Date: 01/15/1988
  • Status: Expired due to Fees
First Claim
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1. A device for absorbing energy adapted to be positioned between two members which may vibrate or oscillate relative to one another due to forces applied to either one or both of the two members, which comprises:

  • a first end piece engageable to one of the two members;

    a second end piece engageable to the other one of the two members;

    an energy absorbing means interposed between the first and second end pieces, said energy absorbing means having a substantially viscous inner section encapsulated by a resilient elastomeric section;

    means for securing said energy absorbing means to each of the first and second end pieces; and

    a flexible reinforced tubular restraining shell surrounding said energy absorbing means and extending at least partially between the first and second end pieces, said restraining shell comprising a helical tensile load carrying member extending substantially the full height of said restraining shell, said restraining shell in conjunction with said energy absorbing means capable of functioning as a support.

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