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Intervertebral spacer device

  • US 5,989,291 A
  • Filed: 02/26/1998
  • Issued: 11/23/1999
  • Est. Priority Date: 02/26/1998
  • Status: Expired due to Term
First Claim
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1. An intervertebral spacer device comprising first and second plate members, each having plate surfaces thereof, said plates being disposed in a spaced apart relationship such that inner ones of said plate surfaces oppose one another, and external ones of said plate surfaces face in opposite directions;

  • andat least one restoring force providing element disposed between the inner surfaces of said first and second plate members, and disposed such that a compressive load applied to the external faces of said plates is counteracted by said at least one restoring force providing element, said at least one restoring force providing element including at least one belleville washer having a narrow end and a wide end.

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