Patent · US Active

Instrument and method for provisionally locking a polyaxial screw

US9844400B2 · kind B2 · utility

17Cited by

1References

14Claims

0Family size

Inventors

Tara Stevenson · Village of La Jolla, US
Wally Gillespie · Carlsbad, US
Clark Hutton · Oceanside, US

Key dates

Filing date	Oct 18, 2013
Grant date	Dec 19, 2017
Priority date	—
Expiry date	Mar 4, 2034

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B17/708
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

An instrument for provisionally tightening a screw body member to a head of a polyaxial bone screw includes a barrel body, an inner shaft, a handle and lever, and a load link assembly. The barrel body includes a distal end with a pair of rotatable tangs configured to engage the screw body member. The inner shaft includes a distal end configured to engage a bushing within the screw body member. The lever pivotally couples to one of the handle and the barrel body. The load link assembly couples to the inner shaft and the lever. Actuation of the lever towards causes the load link assembly to longitudinally displace the inner shaft toward the distal end to contact the bushing and advance the bushing into frictional fit between the screw body member and the head of the polyaxial bone screw.

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