US3716057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guarded dorsal osteotome with stabilizer
Assignee: NEO COMTEMPORARIES Inc 795A SOUTHERN ARTERY QUINCY MA 02169 A CORP OF MA
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Filing: 1970-04-13
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Granted: 1973-02-13
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Expires: 1990-04-13
Abstract
Abstract A chisel for cutting bony tissue has a sharp cutting edge at one end. At the ends of the edge are slightly thickened and rounded elements which guard against accidental side-slips of the cutting end of the chisel. The slightly thickened ends which are called Guards also show the depth and position of the chisel in the bone. Its purpose is to prevent removing too much nasal bone as well as to prevent the chisel from cutting the skin along the edge of the chisel. A gripping element to be grasped by the thumb and a finger at an intermediate point on the chisel is effective in preventing deflection of the cutting end of the chisel by the grain of the bony tissue, which could result in removing bone from the nasal dorsum in an oblique manner.
Inventors
- 👤 F Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:20
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1604
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A device for cutting and shaving bony tissue, said device comprising: a. an elongated shaft formed with a protuberance at a working end of said device, said shaft having upper, lower and side surfaces, said upper and lower surfaces converging toward said working end, said side surfaces diverging toward said working end, said protuberance being symmetrical about the longitudinal axis of said shaft, said protuberance having a straight cutting edge at a central portion, said cutting edge being transveral to said longitudinal axis, opposite ends of said cutting edge being thickened and rounded; and b. a stabilizer mounted on said upper surface of said shaft at an intermediate point thereof, said stabilizer being an upstanding block, said upstanding block having opposite sides extending lengthwise of said device and being formed with curved surfaces which are symmetrical about said longitudinal axis and define outwardly facing arcuate recesses, said stabilizer defining a purchase for application of force to push said device and for guiding said device as it is thrust through the bony tissue.
Claim 2
Independent Claim
172 words
A device for cutting and shaving bony tissue, said device comprising: a. an elongated shaft formed with a protuberance at a working end of said device, said shaft having upper, lower and side surfaces, said upper and lower surfaces converging toward said working end, said side surfaces diverging toward said working end, said protuberance being symmetrical about the longitudinal axis of said shaft, said protuberance having a straight cutting edge at a central portion, said cutting edge being transveral to said longitudinal axis, opposite ends of said cutting edge being thickened and rounded; and b. a stabilizer mounted on said upper surface of said shaft at an intermediate point thereof, said stabilizer being an upstanding block, said upstanding block having opposite sides extending lengthwise of said device and being formed with curved surfaces which are symmetrical about said longitudinal axis and define outwardly facing arcuate recesses, said stabilizer defining a purchase for application of force to push said device and for guiding said device as it is thrust through the bony tissue.
References Cited (Backward Citations)
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Cited
US701503A
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US1546975A
Cited
US2029495A
Cited
FR1094820A
Cited
US2669993A
Cited
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Cited
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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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |