US4620547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument for sampling tissue specimens
Assignee: Richard Wolf GmbH
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Filing: 1984-12-28
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Granted: 1986-11-04
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Expires: 2004-12-28
Abstract
Abstract The instrument for sample tissue specimens comprises an inner shaft extending eccentrically through a distally closed outer shaft and intended for reception of an optical system comprising a lateral objective, which inner shaft is distally connected or connectible to a cutting edge which cooperates with an edge of a distal lateral viewing and cutting aperture in the outer shaft acting as a mating cutting edge over the area of this distal lateral aperture by axial displacement of the inner shaft within the outer shaft.
Inventors
- 👤 Manfred Boebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:00
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/04; A61B17/00; A61B17/32; A61B17/320016
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
260 words
An instrument for sampling tissue specimens under constant visual inspection comprising a hollow outer shaft enclosing an axial passage and having a closed distal end, said shaft having a lateral aperture adjacent said closed distal end with a proximal edge of said aperture forming a first cutting edge, an inside shaft having a first portion of a smaller diameter than the inner diameter of the outer shaft, means for mounting the inside shaft within the outer shaft with the first portion being eccentrically positioned in the outer shaft, said means enabling axial reciprocal movement between the inside and outer shafts, said inside shaft having an optical system having a portion terminating adjacent a distal end of the first portion of the inside shaft to enable viewing through said aperture, an outer surface of the first portion of the inside shaft and the inner surface of the outer shaft form a space therebetween, said space having means for connecting to a source of suction to form an extraction channel, an enlarged annular ring-shaped portion forming an annular cutter having a diameter corresponding to the inner diameter of the outer shaft with one edge of the cutter forming a second cutting edge cooperating with the first cutting edge, said annular cutter being connected to a distal end of the first portion of the inside shaft and means for shifting the inside shaft relative to the outer shaft so that axial movement of the inside shaft to shift the first and second cutting edges together will cut a specimen extending through said aperture.
Claim 2
Dependent Claim
260 words
An instrument for sampling tissue specimens under constant visual inspection comprising a hollow outer shaft enclosing an axial passage and having a closed distal end, said shaft having a lateral aperture adjacent said closed distal end with a proximal edge of said aperture forming a first cutting edge, an inside shaft having a first portion of a smaller diameter than the inner diameter of the outer shaft, means for mounting the inside shaft within the outer shaft with the first portion being eccentrically positioned in the outer shaft, said means enabling axial reciprocal movement between the inside and outer shafts, said inside shaft having an optical system having a portion terminating adjacent a distal end of the first portion of the inside shaft to enable viewing through said aperture, an outer surface of the first portion of the inside shaft and the inner surface of the outer shaft form a space therebetween, said space having means for connecting to a source of suction to form an extraction channel, an enlarged annular ring-shaped portion forming an annular cutter having a diameter corresponding to the inner diameter of the outer shaft with one edge of the cutter forming a second cutting edge cooperating with the first cutting edge, said annular cutter being connected to a distal end of the first portion of the inside shaft and means for shifting the inside shaft relative to the outer shaft so that axial movement of the inside shaft to shift the first and second cutting edges together will cut a specimen extending through said aperture.
Claim 3
Dependent Claim
34 words
An instrument according to claim 1, wherein the means for shifting the inside shaft and the outer shaft includes a handle connected to the outer shaft and a handle connected to the inside shaft.
Claim 4
Dependent Claim
42 words
An instrument according to claim 2, wherein said means for shifting includes a spring disposed between said handles to axially shift the handles to a position to cause the second cutting edge to move into cutting engagement with the first cutting edge.
Claim 5
Dependent Claim
19 words
An instrument according to claim 1, wherein said annular ring-shaped portion is an integral part of the inside shaft.
References Cited (Backward Citations)
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US3606878A
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US4254762A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-03 | 1990-05-05 | 1990-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-03 | 1994-05-05 | 1994-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-03 | 1998-05-05 | 1998-11-04 | $7700.00 | Window Closed / Lapsed |