US3670733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precise depth cutter
Assignee: Individual
•
Filing: 1970-09-14
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Granted: 1972-06-20
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Expires: 1990-09-14
Abstract
Abstract A flat member is incised at an angle of approximately 45* to a straight section of its perimeter, and a narrow portion of the body adjacent to the 45* angle is folded approximately 90* to form a guide. The remaining downwardly extending portion on the other side of the incision is sharpened to form a straight blade which can be ground to a desired length to cut soft materials precisely to exact depths. To maximize safety, a rounded portion is formed rearwardly from the blade region. The blade edge is totally exposed below the plane of the guide, to help promote accuracy. The angle of the blade edge and the slight downward inclination of the unsharpened edge extending rearwardly from the point, allow the device to initiate and sustain a prescribed depth incision with relatively slight downward pressure required on the part of the user.
Inventors
- 👤 Richard S Carlisle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:23
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3209; A61B17/32093
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
209 words
A device for use in incising a prescribed depth into soft material upon a movement of said device across the surface of the material, comprising a thin, flat main body portion, an extending blade portion substantially in the plane of the main body, and having a blade edge disposed at an acute angle to the plane of an adjacent guide portion carried by the main body and disposed approximately perpendicularly to the plane of the main body portion, the blade edge protruding outwardly from the main body portion past the plane of said guide portion, the guide portion extending on both sides of an imaginary plane intersecting the blade edge at an intermediate region thereof and extending perpendicularly to the plane of the guide portion so as to support soft material directly opposite the material being incised, said guide portion terminating in an edge forming an acute angle with the plane of the main body portion at the side of the guide portion adjacent the blade edge, the blade edge ending at a point formed with an unsharpened substantially straight edge in a plane which diverges from the blade end at an acute angle less thAn the angle formed by the blade edge and the plane of the guide.
Claim 2
Independent Claim
209 words
A device for use in incising a prescribed depth into soft material upon a movement of said device across the surface of the material, comprising a thin, flat main body portion, an extending blade portion substantially in the plane of the main body, and having a blade edge disposed at an acute angle to the plane of an adjacent guide portion carried by the main body and disposed approximately perpendicularly to the plane of the main body portion, the blade edge protruding outwardly from the main body portion past the plane of said guide portion, the guide portion extending on both sides of an imaginary plane intersecting the blade edge at an intermediate region thereof and extending perpendicularly to the plane of the guide portion so as to support soft material directly opposite the material being incised, said guide portion terminating in an edge forming an acute angle with the plane of the main body portion at the side of the guide portion adjacent the blade edge, the blade edge ending at a point formed with an unsharpened substantially straight edge in a plane which diverges from the blade end at an acute angle less thAn the angle formed by the blade edge and the plane of the guide.
Claim 3
Dependent Claim
53 words
A device as set forth in claim 1 wherein the outer perimeter of said guide portion forms an angle of less than 60* to the plane of said main body portion at the juncture of the end of the guide portion remote from its juncture with the blade portion, and the main body.
Claim 4
Dependent Claim
45 words
A device as set forth in claim 1 wherein a short region of the perimeter of said main body portion beginning at the juncture between the end of the guide portion remote from its juncture with the blade portion, and the main body, curves outwardly.
Claim 5
Dependent Claim
49 words
A device as set forth in claim 1 wherein said unsharpened substantially straight edge is disposed at an angle of approximately 10* to the plane of said guide portion, and extends to a juncture with a rounded tail portion which is substantially in the plane of the main body.
Claim 6
Dependent Claim
43 words
A device as set forth in claim 1 wherein, an abbreviated handle portion is formed as part of the main body, such that the device may be substantially concealed from view when held in the hand of the user in an operating position.
Claim 7
Dependent Claim
24 words
A device as set forth in claim 5 wherein, said handle portion is coated with a material suitable for gripping with the finger tips.
Claim 8
Independent Claim
89 words
A method of making a device for incising a precise depth into soft material including the steps of: a. Stamping out a suitable pattern of sheet metal to form the main body of the device including a perimeter having a straight portion, b. making a shear cut at an acute angle to the straight portion of the perimeter and folding at an angle of at least 80* to the plane of the pattern an edge region of the pattern adjacent to the acute angle side of the shear cut.
Claim 9
Independent Claim
89 words
A method of making a device for incising a precise depth into soft material including the steps of: a. Stamping out a suitable pattern of sheet metal to form the main body of the device including a perimeter having a straight portion, b. making a shear cut at an acute angle to the straight portion of the perimeter and folding at an angle of at least 80* to the plane of the pattern an edge region of the pattern adjacent to the acute angle side of the shear cut.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |