Intervertebral spacer device having arch shaped spring element
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United States of America Patent
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-
Aug 28, 2007
Grant Date -
May 27, 2004
app pub date -
Nov 18, 2003
filing date -
Oct 18, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An intervertebral spacer device having a pair of opposing plates for seating against opposing vertebral bone surfaces, separated by at least one spring mechanism. The preferred spring mechanism is an arched strip spring. In a first embodiment there are multiple springs positioned independently about the area of the opposing plates. In a second embodiment there is a single arched strip spring modified to mount onto a ball-shaped head. The lower plate of this second embodiment includes a post extending upwardly from the inner surface of the plate, the post including a ball-shaped head. The spring and post members are flexibly coupled such that the upper and lower plates may rotate relative to one another.
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