US4539976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endoscopic surgical instrument
Assignee: Individual
•
Filing: 1984-02-08
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Granted: 1985-09-10
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Expires: 2004-02-08
Abstract
Abstract An instrument for surgical procedures is provided which comprises a hollow cannula for slidably receiving a cylindrical scalpel member which is slotted at one end. One side of the slot is ground to produce a cutting edge. The cannula is provided on its exterior with elements for adjustably supporting an elongated optical device which extends substantially parallel to the cannula.
Inventors
- 👤 Jewett M. Sharpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:59
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/267; A61B1/2676; A61B1/002; A61B17/00; A61B17/32; A61B17/320016; A61B18/00; A61B2018/00982
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
167 words
An endoscopic surgical instrument comprising: a hollow cylindrical cannula; a first support element secured to said cannula adjacent one of its ends; a second support element secured to said cannula adjacent the other end of its ends; an elongated optical device retained in substantially parallel relationship with the cannula by said support elements; a scalpel member operatively related to said cannula, said scalpel member comprising a cylindrical element slidably received within the cannula, said cylindrical element having a substantially U-shaped slot at one end extending longitudinally thereof, one side of said slot being ground to produce a cutting edge; and said scalpel member further comprising: a shoulder located adjacent the opposite end of said cylindrical element, the distance between the shoulder and said cutting edge being greater than the length of the cannula whereby when said shoulder engages an end of the cannula, the cutting edge is exposed; and gripping means located on the opposite side of the shoulder from the slotted end of the cylindrical element.
Claim 2
Dependent Claim
167 words
An endoscopic surgical instrument comprising: a hollow cylindrical cannula; a first support element secured to said cannula adjacent one of its ends; a second support element secured to said cannula adjacent the other end of its ends; an elongated optical device retained in substantially parallel relationship with the cannula by said support elements; a scalpel member operatively related to said cannula, said scalpel member comprising a cylindrical element slidably received within the cannula, said cylindrical element having a substantially U-shaped slot at one end extending longitudinally thereof, one side of said slot being ground to produce a cutting edge; and said scalpel member further comprising: a shoulder located adjacent the opposite end of said cylindrical element, the distance between the shoulder and said cutting edge being greater than the length of the cannula whereby when said shoulder engages an end of the cannula, the cutting edge is exposed; and gripping means located on the opposite side of the shoulder from the slotted end of the cylindrical element.
Claim 3
Dependent Claim
15 words
A surgical instrument as set forth in claim 1, wherein said cylindrical element is hollow.
Claim 4
Dependent Claim
26 words
A surgical instrument as set forth in claim 1, further comprising clamping means associated with one of said support elements for adjustably retaining the optical device.
Claim 5
Dependent Claim
16 words
A surgical instrument as set forth in claim 1, wherein said optical device includes fiber optics.
Claim 6
Dependent Claim
15 words
A surgical instrument as set forth in claim 3, wherein said cylindrical element is hollow.
Claim 7
Dependent Claim
15 words
A surgical instrument as set forth in claim 4, wherein said cylindrical element is hollow.
Claim 8
Dependent Claim
26 words
A surgical instrument as set forth in claim 6, further comprising clamping means associated with one of said support elements for adjustably retaining the optical device.
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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) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |