Spinal screw assembly and screw insertion tool

Details Spinal screw assembly and screw insertion tool Spinal screw assembly and screw insertion tool

2009-09-11

2011-11-01

Robert, Eduardo C (Department: 3733)

Surgery

Instruments

Orthopedic instrumentation

C606S265000, C606S267000, C606S300000, C606S305000

Reexamination Certificate

active

08048124

ABSTRACT:
A bone screw assembly includes a tulip-shaped seat, a bone fixation device, a ring-shaped washer, a rod and a cap. The tulip-shaped seat comprises a through opening dimensioned to receive the bone fixation device and a horizontal channel dimensioned to receive the rod. The washer is placed into the seat on top of the bone fixation device head and comprises first and second side tabs and a first pair of upward extending projections separated by a first gap and a second pair of upward extending projections separated by a second gap. The side tabs interface with a groove formed in the bottom portion of the seat. The rod is placed within the channel and positioned within a groove formed on the top surface of the washer. The cap includes first and second projections extending downward from its bottom surface and each of the first and second downward projections comprises first and second sidewise extending ridges. The first ridges of the first and second projections are aligned and placed within the first and second gaps of the washer, respectively, and interface with a first groove formed on the side portion of the seat and the second ridges interface with a second groove on the side portion of the seat when the cap is rotate.

REFERENCES:
patent: 6077262 (2000-06-01), Schlapfer et al.
patent: 6547789 (2003-04-01), Ventre et al.
patent: 7081117 (2006-07-01), Bono et al.
patent: 7125426 (2006-10-01), Moumene et al.
patent: 2007/0032162 (2007-02-01), Jackson
patent: 2007/0288004 (2007-12-01), Alvarez
patent: 2008/0221583 (2008-09-01), Sharifi-Mehr et al.
patent: 2008/0275456 (2008-11-01), Vonwiller et al.
patent: 2009/0005787 (2009-01-01), Crall et al.

Affiliated with

Also associated with

Rating

Spinal screw assembly and screw insertion tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spinal screw assembly and screw insertion tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spinal screw assembly and screw insertion tool will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4295610