Expandable Cannula with Distal Locking Mechanism
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Mar 14, 2014
filing date -
Mar 15, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An expandable cannula includes a proximal end portion having a substantially constant diameter therethrough, and a distal end portion, coupled to the proximal end portion and having a proximal end and a distal end. The distal end portion includes a plurality of panels hinged by “living hinges” to the proximal end portion, and a locking mechanism that stabilizes the distal end portion in one of a contracted position and an expanded position. The locking mechanism may be a strut pressed overcenter during expansion distal portion to expanded configuration, or may include a locking ring and a catch for stabilizing the ring in a configuration where it holds the panels in expanded configuration.
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