Depuy Synthes Products, Inc.

Steven Krevitski

Kory Smith

Jeffrey Darrow

Jeffrey Loftus-Vergari

Donald Lu

Robert Mazzarello

A wrench device includes a proximal member including a first recess and a second recess open to the first recess. The second recess has a width smaller than the first recess. The first recess receives a first screw and the second recess receives a second screw smaller in diameter than the first screw. The device also includes a distal member coupled to the proximal member. The distal member includes a first recess, a second recess open to the first recess, and a third recess open to the second. The first recess has a width larger than a diameter of the second recess. The second recess has a diameter larger than the third recess. When the proximal and distal members are coupled, the first and second recesses of the proximal member are in open communication with the first, second and third recesses of the distal member.

Schanz screw wrench combination tool

Craniosynostosis bone manipulation device

A bone fixation pin is inserted into a bone with an apparatus comprising a housing having a proximal portion and a distal portion, the distal portion having an inner surface and an opening configured to receive the bone fixation pin; a drive shaft having a proximal end configured to engage a handle and a distal end; and a body having an axis and a peripheral edge. The body comprises a bore along the axis, the bore being configured to slidably engage the distal end of the drive shaft; and a plurality of evenly spaced slots in the peripheral edge of the body. A plurality of chuck arms move radially along the evenly spaced slots in the peripheral edge of the body, each chuck arm having an inner surface and an outer surface, with each chuck arm being biased toward the axis of the body by a first biasing force. The outer surface of each chuck arm slidably engages the inner surface of the housing. The distal end of the drive shaft and the body are within the proximal portion of the housing, with the body being biased toward the distal end of the housing by a second biasing force. Each chuck arm has an engaging surface configured to engage a head of the bone fixation pin, where pressure applied to the engaging surface drives the chuck arms in a radial direction against the first biasing force, and simultaneously drives the body carrying the chuck arms axially against the second biasing force.

Apparatus for driving a bone fixation pin

A bone fixation pin is inserted into a bone with an apparatus comprising a housing having a proximal portion and a distal portion, the distal portion having an inner surface and an opening configured to receive the bone fixation pin; a drive shaft having a proximal end configured to engage a handle and a distal end; and a body having an axis and a peripheral edge. The body comprises a bore along the axis, the bore being configured to slidably engage the distal end of the drive shaft; and a plurality of evenly spaced slots in the peripheral edge of the body. A plurality of chuck arms move radially along the evenly spaced slots in the peripheral edge of the body, each chuck arm having an inner surface and an outer surface. The distal end of the drive shaft and the body are within the proximal portion of the housing, the body being biased toward the distal end of the housing; and the inner surface of each chuck arm is configured to engage the bone fixation pin. The outer surface of each chuck arm slidably engages the inner surface of the housing.

Growing community of inventors

West Chester, PA, United States of America

Steven Krevitski