Locking polyaxial ball and socket fastener
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United States of America Patent
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Jun 18, 2013
Grant Date -
Aug 25, 2011
app pub date -
May 6, 2011
filing date -
Nov 14, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A polyaxial ball and socket joint that can be locked into a fixed position. The fastening system consists of the polyaxial ball and socket joint used in conjunction with a bone screw having threads on one end for use in anchoring to the spine and a spherical connector on the other end operating as a pivot point about which a connecting assembly moves in a polyaxial fashion. A substantially U-shaped connecting assembly has a lower receptacle that operates as a socket for housing an upper retainer ring and a lower split retaining ring. The socket is receptive to the spherical connector which is inserted through the lower split retainer ring causing a momentary displacement thereof which allows for the positioning of the spherical connector between the upper and lower retainer rings.
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