Patent US4271845A successfully refreshed from Google Patents.
US4271845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for bending a medical instrument inserted into the body cavity
Assignee: Pentax Corp
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Filing: 1979-07-02
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Granted: 1981-06-09
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Expires: 1999-07-02
Abstract
Abstract A device for bending a medical instrument inserted into the body cavity having a flexible cylindrical coil formed by winding an elastic thin wire. The flexible cylindrical coil has a coarsely wound portion at one end portion thereof, that is designed by changing configuration or material so that one side of the coarsely wound portion is different in cross sectional area from the other side which is diametrically opposite. When a pulling string directly or indirectly fastened to the coarsely wound portion of the flexible cylindrical coil is operated, the turns of said flexible cylindrical coil are brought closer to each other on the side of the coarsely wound portion greater in torsional strength to thereby bend the one end portion of the flexible cylindrical coil towards the side of the coarsely wound portion.
Inventors
- 👤 Kiyoshi Chikashige
- 👤 Nagashige Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:09
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/04; A61B1/00; A61B1/005; A61B1/0051; A61B1/0055; A61B1/0056; A61B10/06; A61B2010/0216; A61B17/00; A61B17/28; A61B17/29; A61B2017/2901; A61B2017/2905; A61B17/32; A61B2017/320004; A61B2017/320012
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
169 words
A device for bending a medical instrument inserted into the body cavity, comprising: a flexible cylindrical coil formed by winding an elastic thin wire and having a longitudinal axis, said flexible cylindrical coil having a coarsely wound portion at one end portion thereof, said coarsely wound portion having a first side and a second side which is diametrically opposite to said first side, said second side having a cut-out portion having a substantially flat profile substantially parallel to said longitudinal axis to thereby provide said first side with a greater torsional strength than said second side; and a pulling string fastened to said coarsely wound portion of said flexible cylindrical coil, whereby when said pulling string is operated, the turns of said flexible cylindrical coil are brought closer to each other on said first side of said coarsely wound portion greater in torsional strength than said second side to thereby bend said one end portion of said flexible cylindrical coil towards said first side of said coarsely wound portion.
Claim 2
Independent Claim
169 words
A device for bending a medical instrument inserted into the body cavity, comprising: a flexible cylindrical coil formed by winding an elastic thin wire and having a longitudinal axis, said flexible cylindrical coil having a coarsely wound portion at one end portion thereof, said coarsely wound portion having a first side and a second side which is diametrically opposite to said first side, said second side having a cut-out portion having a substantially flat profile substantially parallel to said longitudinal axis to thereby provide said first side with a greater torsional strength than said second side; and a pulling string fastened to said coarsely wound portion of said flexible cylindrical coil, whereby when said pulling string is operated, the turns of said flexible cylindrical coil are brought closer to each other on said first side of said coarsely wound portion greater in torsional strength than said second side to thereby bend said one end portion of said flexible cylindrical coil towards said first side of said coarsely wound portion.
Claim 3
Dependent Claim
21 words
A device as claimed in claim 1 wherein said first side has a different cross sectional area than said second side.
Claim 4
Independent Claim
22 words
A device as claimed in claims 1 or 2, wherein said second side has said cut-out portion at the outer side thereof.
Claim 5
Independent Claim
32 words
A device as claimed in claims 1 or 2 further comprising a finely wound portion of said flexible cylindrical coil formed as a continuation of one end of said coarsely wound portion.
Claim 6
Dependent Claim
21 words
A device as claimed in claim 4 further comprising a forceps attached to the other end of said coarsely wound portion.
Claim 7
Dependent Claim
22 words
A device as claimed in claim 4 further comprising an excoriating brush attached to the other end of said coarsely wound portion.
References Cited (Backward Citations)
US3452742A
Cited
US3452740A
Cited
US3521620A
Cited
US3613664A
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US3749085A
Cited
US3805767A
Cited
US3964468A
Cited
US3973556A
Cited
US4020829A
Cited
US4215703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |