Patent US4098157A successfully refreshed from Google Patents.
US4098157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for suture removal
Assignee: Individual
•
Filing: 1975-06-26
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Granted: 1978-07-04
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Expires: 1995-06-26
Abstract
Abstract A method is provided for cutting and removing sutures with a thin, flat blade mounted on one end. The blade has a sharp, concave cutting edge and a flattened, convex bearing edge. The cutting and bearing edges converge to a sharp point at the first end of the blade and diverge towards a second end of the blade. The arc of the bearing edge is substantially equal to or less than the arc of the cutting edge. A handle is secured to the second blade end and an obtuse angle is formed between a line drawn parallel to the longitudinal axis of the handle and a line tangent to the bearing edge at the point. The blade cuts sutures as the sutures are lifted from the sutured surface by the blade being rotated away from the sutured surface and linearly advanced.
Inventors
- 👤 Donald E. Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:24
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3209; A61B17/3211; A61B17/04; A61B17/0467; Y; Y10; Y10T; Y10T83/00; Y10T83/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
220 words
A method of cutting sutures with an instrument operable with one hand, wherein said instrument comprises a thin, substantially flat blade having a sharp concave cutting edge and widening to a non-cutting, convex bearing edge, said cutting and bearing edges converging to a sharp point at a first blade end and diverging to a second blade end remote from the first end with the arc of said bearing edge being substantially equal to or less than the arc of said cutting edge, and a handle secured to said second end of the blade, an obtuse angle being formed between a line drawn parallel to the longitudinal axis of that portion of the handle which is connected to the blade and a line drawn tangent to the bearing edge at the point of the blade, comprising the steps of: inserting the pointed end of the blade between a suture and the sutured surface with the sharpened edge in engagement with the suture and the non-cutting bearing edge in engagement with the sutured surface; rotating the blade to raise the suture from the sutured surface and to direct the blade point away from the sutured surface; and, linearly advancing and further rotating the blade to progressively increase the tension on the suture across the sharpened blade edge until the suture is severed.
Claim 2
Independent Claim
220 words
A method of cutting sutures with an instrument operable with one hand, wherein said instrument comprises a thin, substantially flat blade having a sharp concave cutting edge and widening to a non-cutting, convex bearing edge, said cutting and bearing edges converging to a sharp point at a first blade end and diverging to a second blade end remote from the first end with the arc of said bearing edge being substantially equal to or less than the arc of said cutting edge, and a handle secured to said second end of the blade, an obtuse angle being formed between a line drawn parallel to the longitudinal axis of that portion of the handle which is connected to the blade and a line drawn tangent to the bearing edge at the point of the blade, comprising the steps of: inserting the pointed end of the blade between a suture and the sutured surface with the sharpened edge in engagement with the suture and the non-cutting bearing edge in engagement with the sutured surface; rotating the blade to raise the suture from the sutured surface and to direct the blade point away from the sutured surface; and, linearly advancing and further rotating the blade to progressively increase the tension on the suture across the sharpened blade edge until the suture is severed.
Claim 3
Independent Claim
228 words
A method of cutting sutures with an instrument operable with on hand, wherein said instrument comprises a thin, substantially flat blade having a sharp concave cutting edge and widening to a non-cutting, convex bearing edge, said cutting and bearing edges converging to a sharp point at a first blade end and diverging to a wedged-shaped transverse cross-sectional area of the blade at a second blade end remote from the first end with the arc of said bearing edge being substantially equal to or less than the arc of said cutting edge, and a handle secured to said second end of the blade, an obtuse angle being formed between a line drawn parallel to the longitudinal axis of that portion of the handle which is connected to the blade and a line drawn tangent to the bearing edge at the point of the blade, comprising the steps of: inserting the pointed end of the blade between a suture and the sutured surface with the sharpened edge in engagement with the suture and the non-cutting, bearing edge in engagement with the sutured surface; rotating the blade to raise the suture from the sutured surface and to direct the blade point away from the sutured surface; and, linearly advancing and further rotating the blade to progressively increase the tension on the suture across the blade edge until the suture is severed.
Claim 4
Independent Claim
228 words
A method of cutting sutures with an instrument operable with on hand, wherein said instrument comprises a thin, substantially flat blade having a sharp concave cutting edge and widening to a non-cutting, convex bearing edge, said cutting and bearing edges converging to a sharp point at a first blade end and diverging to a wedged-shaped transverse cross-sectional area of the blade at a second blade end remote from the first end with the arc of said bearing edge being substantially equal to or less than the arc of said cutting edge, and a handle secured to said second end of the blade, an obtuse angle being formed between a line drawn parallel to the longitudinal axis of that portion of the handle which is connected to the blade and a line drawn tangent to the bearing edge at the point of the blade, comprising the steps of: inserting the pointed end of the blade between a suture and the sutured surface with the sharpened edge in engagement with the suture and the non-cutting, bearing edge in engagement with the sutured surface; rotating the blade to raise the suture from the sutured surface and to direct the blade point away from the sutured surface; and, linearly advancing and further rotating the blade to progressively increase the tension on the suture across the blade edge until the suture is severed.
Claim 5
Dependent Claim
47 words
A method of cutting sutures with an instrument operable with one hand as defined in claim 2, further comprising the step of: maintaining the non-cutting bearing edge in engagement with the sutured surface during the rotation of the blade to raise the suture from the sutured surface.
Claim 6
Dependent Claim
37 words
A method of cutting sutures with an instrument operable with one hand as defined in claim 2, comprising the further step of: maintaining the non-cutting, bearing edge in engagement with the sutured surface during both rotating steps.
Claim 7
Dependent Claim
40 words
A method of cutting sutures with an instrument operable with one hand as defined in claim 2, wherein the step of: linearly advancing and further rotating the blade is simultaneous; to direct the blade point away from the sutured surface.
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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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |