US4711240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical dissector
Assignee: Duke University Patents Foundation
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Filing: 1986-05-15
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Granted: 1987-12-08
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Expires: 2006-05-15
Abstract
Abstract A surgical dissector has parallel arms mounted by a scissors linkage for moving toward and away from one another while remaining parallel. A plurality of teeth extend transversely from the arms and are positioned so that they may be interdigitated when the dissector is in a closed position. The teeth have rounded distal ends and are sufficient spaced so that spaces remain between the interdigitated teeth. The dissector is particularly useful in partial kidney resectioning.
Inventors
- 👤 Benad Goldwasser
- 👤 Culley Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:19
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/28; A61B17/2804; A61B90/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
A surgical dissector for crushing friable organ tissue, comprising: first and second parallel arms, each having an essentially planar surface; means for moving said first and second arms toward and away from one another while maintaining said arms parallel to one another; and a plurality of mutually parallel and cylindrical teeth mounted on and projecting from said planar surface of each of said first and second arms, said teeth on each of said arms projecting from said arm in a direction transverse to a length of said arm and forming an array extending along the length of said arm, all of said teeth having rounded distal ends and being positioned on said arms so as to be mutually interdigitated when said arms are moved toward one another to a closed position, wherein said teeth are positioned on said arms such that spaces are provided between said interdigitated teeth.
Claim 2
Dependent Claim
148 words
A surgical dissector for crushing friable organ tissue, comprising: first and second parallel arms, each having an essentially planar surface; means for moving said first and second arms toward and away from one another while maintaining said arms parallel to one another; and a plurality of mutually parallel and cylindrical teeth mounted on and projecting from said planar surface of each of said first and second arms, said teeth on each of said arms projecting from said arm in a direction transverse to a length of said arm and forming an array extending along the length of said arm, all of said teeth having rounded distal ends and being positioned on said arms so as to be mutually interdigitated when said arms are moved toward one another to a closed position, wherein said teeth are positioned on said arms such that spaces are provided between said interdigitated teeth.
Claim 3
Dependent Claim
17 words
The dissector of claim 1 wherein said teeth are evenly spaced along said length of said arms.
Claim 4
Dependent Claim
37 words
The dissector of claim 1 including a plate having a flat surface and means for mounting said plate on one of said arms such that said flat surface faces said teeth of the other of said arms.
Claim 5
Dependent Claim
37 words
The dissector of claim 3 wherein said means for mounting comprise holes in a portion of said plate opposite said flat surface, said holes being postioned such that distal ends of said teeth may be fitted therein.
Claim 6
Dependent Claim
17 words
The dissector of claim 1 wherein said means for moving comprise a scissors linkage connecting said arms.
Claim 7
Dependent Claim
12 words
The dissector of claim 1 including handles on each of said arms.
Claim 8
Dependent Claim
25 words
The dissector of claim 1 including means for stabilizing said arms in said closed position such that said arrays of interdigitated teeth are substantially aligned.
Claim 9
Dependent Claim
38 words
The dissector of claim 7 wherein said means for stabilizing comprise a projection mounted on one of said arms and fittable in a hole in the other of said arms when said arms are in said closed position.
Claim 10
Dependent Claim
22 words
The dissector of claim 1 wherein said means for moving include means for constraining said arms against relative movement along their lengths.
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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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |