INSTRUMENT FOR FORMING A CAVITY WITHIN A BONE
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United States of America Patent
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N/A
Issued Date -
Jun 2, 2011
app pub date -
Jul 16, 2009
filing date -
Jul 29, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An instrument for forming a cavity within a bone. The instrument comprises a shaft, a blade pivotally mounted on the shaft towards a first end of the shaft and a push rod extending within the shaft and coupled to the blade, the push rod being arranged to slide within the shaft to cause the blade to rotate about its pivot. The instrument further comprises a depth stop coupled to the shaft arranged such that when the shaft is inserted into a bore extending into a bone the depth stop is arranged to engage bone surrounding the bore to limit movement of the shaft into the bore. A spring couples the push rod to the shaft and is arranged to resist axial movement of the push rod within the shaft towards the first end of the shaft. When the depth stop engages bone surrounding a bore, axial force exceeding the spring resistance applied to the push rod causes the push rod to slide within the shaft.
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