Kempton K. Carroll, II;Sean P. Conlon;William B. Weisenburgh, II;David B. Griffith;Christopher J. Hess
发明人:
David B. Griffith,Sean P. Conlon,William B. Weisenburgh, II,Christopher J. Hess,Kempton K. Carroll, II
申请号：
US13470781
公开号：
US09427255B2
申请日:
2012.05.14
申请国别(地区):
US
年份:
2016
代理人:
摘要：
A cannula assembly including a seal for an endoscopic internal magnetic camera tether. The seal may include stacked compliant membranes with an aperture in each membrane through which a camera tether may pass. The apertures may overlap. The at least one aperture may be arranged as a slit. Each of the apertures may comprise a wedge-shaped gap. The membranes may include engagement members that couple to engagement members on the cannula assembly. The cannula assembly may provide separate ports for the camera tethers and for a trocar or other endoscopic instrument passing through the cannula assembly. The cannula assembly also may include a rotating housing with two openings and a seal arranged in each opening. The cannula assembly may include a sleeve that encases a cannula tube. The sleeve may include a seal on its end and a channel on its periphery through which a camera tether may pass.
