Orthodontic expansion screw
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 23, 2010
Issued Date -
N/A
app pub date -
Dec 20, 2007
filing date -
Jan 13, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An orthodontic expansion screw having two bodies whose distance from each other can be changed by means of a spindle that engages both bodies. The spindle includes an actuation part for effecting a torque for readjusting the spindle, and a straight-line guide for engaging both bodies and guiding the bodies along two guide axes that are parallel to each other while preventing a relative rotation of the bodies when their distance from each other is being changed. A friction brake is provided that presses onto the actuation part of the spindle and thus generates a frictional force that renders a rotation of the spindle in both directions of rotation more difficult in order to prevent inadvertent readjustment of the spindle.
First Claim
Family
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Cited Art Landscape
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