Patent · US Expired

Locking mechanism for a bone screw

US6702817B2 · kind B2 · utility

121Cited by

14References

14Claims

0Family size

Assignee

Aesculap AG & Co. KG · DE

Inventors

Jens Beger · Tuttlingen, DE
Rudolf Zepf · Spaichingen, DE
Rudolf Beisse · Rosenheim, DE
Michael Potulski · Rosenheim, DE

Key dates

Filing date	Jan 3, 2002
Grant date	Mar 9, 2004
Priority date	—
Expiry date	Jul 29, 2022

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B2017/8655
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A locking mechanism for securing a bone screw 20 to a clamping element 30 of an osteosynthesis holding system 5 is provided. The bone screw 20 has a circumferential groove 25 located on a top portion of the screw 20 below a screw head 22. Snap catches 35 protrude from a bone-contacting surface 38 of the clamping element 30 and interlock with the groove 25 in the screw 20 when the screw 20 is inserted into the clamping element 30 (e.g., when the screw is screwed into a bone segment through a hole in the clamping element). A removal device 90 is provided for removing the screw 20, as a greater axial force is required to overcome the locking mechanism than is needed to engage the locking mechanism. A method for revision (removal) of the screw 20 from the locking mechanism is also provided.

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