Patent US5406940A successfully refreshed from Google Patents.
US5406940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical instrument for creating a tissue canal
Assignee: Olympus Winter and Ibe GmbH
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Filing: 1993-08-25
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Granted: 1995-04-18
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Expires: 2013-08-25
Abstract
Abstract A surgical instrument for creating a tissue canal in which to seat a sleeve has a shaft tube with a knife blade at its distal end to form an incision and an insert to transform the incision into the tissue canal. The knife blade is formed as an axially projecting portion of the distal edge of the shaft tube and has a ground edge for cutting in the circumferential direction of the shaft tube. The insert is slidable mounted in the shaft tube and has a distal blunt end located adjacent the distal end of the shaft tube.
Inventors
- 👤 Andreas Melzer
- 👤 Gerhard Buess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:13
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/00163; A61B1/00188; A61B1/00064; A61B1/00071; A61B1/0008; A61B1/00087; A61B1/00131; A61B1/00135; A61B1/313; A61B17/00; A61B17/34; A61B17/3417; A61B17/3494; A61B17/3496
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
A surgical instrument for creating a tissue canal to seat a sleeve comprising a shaft tube having a central axis, a proximal end and a distal end; means for rotatably supporting said shaft tube on said instrument; a knife blade at said distal end of said tube to form an incision, said blade comprising an axially projecting portion of said distal end of said shaft tube with a sharpened surface for cutting in a circumferential direction of said shaft tube; drive means for rotating said shaft tube about a longitudinal axis through a preselected angle and in alternating directions of rotation; and an insert mounted in said shaft tube and having a blunt distal end substantially adjacent to said distal end of said shaft tube.
Claim 2
Dependent Claim
125 words
A surgical instrument for creating a tissue canal to seat a sleeve comprising a shaft tube having a central axis, a proximal end and a distal end; means for rotatably supporting said shaft tube on said instrument; a knife blade at said distal end of said tube to form an incision, said blade comprising an axially projecting portion of said distal end of said shaft tube with a sharpened surface for cutting in a circumferential direction of said shaft tube; drive means for rotating said shaft tube about a longitudinal axis through a preselected angle and in alternating directions of rotation; and an insert mounted in said shaft tube and having a blunt distal end substantially adjacent to said distal end of said shaft tube.
Claim 3
Dependent Claim
12 words
An instrument according to claim 1 wherein said preselected angle is adjustable.
Claim 4
Dependent Claim
26 words
An instrument according to claim 2 wherein said drive comprises an electric motor and wherein said motor is automatically energized when said blade is axially advanced.
Claim 5
Dependent Claim
22 words
An instrument according to claim 1 and further comprising endoscope optics having an objective mounted at said distal end of said insert.
Claim 6
Dependent Claim
18 words
An instrument according to claim 3 wherein said optics allows focusing on the front surface of the objective.
Claim 7
Dependent Claim
45 words
An instrument according to claim 4 wherein said optics comprises a proximal ocular and focuses on objects spaced beyond said objective, and further comprises an adapter attached to said ocular for adjusting the focal length to enable focusing on the front surface of the objective.
Claim 8
Dependent Claim
35 words
Instrument defined in claim 6 wherein said adapter is adjustable in either of two focal lengths for selecting between focusing on the front surface of said objective and at a selected distance beyond said objective.
Claim 9
Dependent Claim
24 words
An instrument according to claim 1 and including means for rotatably supporting said insert for rotation about said central axis of said shaft tube.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-17 | 1998-10-17 | 1999-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-17 | 2002-10-17 | 2003-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-17 | 2006-10-17 | 2007-04-18 | $7700.00 | Window Closed / Lapsed |