Seal for a cannula
First Claim
1. A cannula comprising:
- a proximal instrument insertion portion;
a distal tubular portion defining an access channel for extension of an instrument therethrough; and
a first seal for sealingly engaging with the instrument shaft;
the first seal being movably coupled to the proximal portion to facilitate relative movement between the first seal and the proximal portion to accommodate lateral movement of the instrument passing therethrough while maintaining sealing engagement between the first seal and the instrument shaft.
1 Assignment
0 Petitions
Accused Products
Abstract
A cannula (1) comprises a distal hollow tubular section (2), a proximal instrument insertion section (3), a lip seal (4) for sealingly engaging with an instrument shaft (5), and a duck-bill seal (10) also for sealingly engaging with the instrument shaft (5). The lip seal (4) is movably coupled to the proximal section (3) by a coupling section, provided in the form of a flexible tubular sheath section (6). The distal section (2) defines an access channel (7) for extension of the instrument shaft (5) therethrough. The proximal section (3) has a proximal opening (8) through which the instrument shaft (5) may be inserted into the proximal section (3). The distal end of the flexible section (6) is fixedly attached to the proximal section (3), and the proximal end of the flexible section (6) is fixedly attached to the lip seal (4). The flexible section (6) facilitates relative movement between the lip seal (4) and the proximal section (3) to accommodate lateral movement of the instrument (5) while maintaining the seal between the lip seal (4) and the instrument (5).
227 Citations
27 Claims
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1. A cannula comprising:
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a proximal instrument insertion portion;
a distal tubular portion defining an access channel for extension of an instrument therethrough; and
a first seal for sealingly engaging with the instrument shaft;
the first seal being movably coupled to the proximal portion to facilitate relative movement between the first seal and the proximal portion to accommodate lateral movement of the instrument passing therethrough while maintaining sealing engagement between the first seal and the instrument shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification