Patent · US Active

Bottom mounted pedical screw assembly

US8257401B2 · kind B2 · utility

2Cited by

0References

11Claims

0Family size

Assignee

Spinal USA, Inc. · US

Inventors

Adam Cermak · Alexandria, US
Jeffrey Johnson · Camden, US
Gil Aust · Huntsville, US

Key dates

Filing date	Feb 12, 2009
Grant date	Sep 4, 2012
Priority date	—
Expiry date	Jul 21, 2030

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B17/7032
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A bone screw, which can be a pedicle screw, is generally tulip-shaped. A bore in the bottom of the tulip permits a threaded shaft to be partially inserted into the open interior of the tulip. A seat is formed on the threaded shaft and receives the bottom of the tulip, and prevents the threaded shaft from being inserted too far into the tulip. A saddle is positioned in the interior of the tulip and receives the end of the threaded shaft on one end and can include a trough on its opposite face which can receive a rod that connects together two or more such assemblies. A retaining screw threads into the upper interior surface of the tulip to hold the subcomponents together.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.