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Controllable vibration apparatus

  • US 5,878,851 A
  • Filed: 07/02/1996
  • Issued: 03/09/1999
  • Est. Priority Date: 07/02/1996
  • Status: Expired due to Term
First Claim
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1. In a controllable vibration device having a body defining an internal cavity, a piston cooperating with said internal cavity, means subdividing said internal cavity into an upper chamber and a lower chamber, a fluid contained within said upper and lower chambers, an electrically-controllable member controlling flow of said fluid in a fluid passage between said upper and lower chambers, the improvement comprising:

  • (a) circuit means for carrying a high-potential electrical current to said electrically-controllable member, said circuit means including a single-strand electrical conductor passing into said internal cavity,(b) means for completing said circuit means to a low-potential(c) a flexible sealing element closely surrounding said single-strand electrical wire, and(d) means for axially compressing said flexible sealing element such that said flexible sealing element radially expands into sealing engagement with said single-strand electrical conductor.

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