Valve assembly including diameter reduction structure for...

Details Valve assembly including diameter reduction structure for... Valve assembly including diameter reduction structure for...

2006-04-11

2006-04-11

Sirmons, Kevin C. (Department: 3767)

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

C606S167000

Reexamination Certificate

active

07025747

ABSTRACT:
A valve assembly and diameter reduction structure for trocar employing a movable diameter reduction structure. The diameter reduction structure is positioned in proximity to a first seal and includes a plurality of stand off members movable between a first position, a second position, and a third position. The diameter reduction structure in the first position reduces the likelihood of the first seal losing its integrity by limiting excessive off-axis and angular movements of small diameter surgical instruments. When large diameter surgical instruments are positioned through the trocar, the diameter reduction structure pivots to accommodate the passage of larger diameter surgical instruments without any operational adjustments.

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