US4373518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of drilling living bone
Assignee: Zimmer Inc
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Filing: 1980-09-26
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Granted: 1983-02-15
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Expires: 2000-09-26
Abstract
Abstract This invention relates to a method of using a half-drill for drilling holes in living bone for orthopaedic operations. The invention also relates to a method of using a half-drill tip on skeletal bone pin for drilling holes in living bone and subsequently using that skeletal pin with external immobilization devices or alone in circumstances where a Steinmann Pin or large Kirschner wire might commonly be selected.
Inventors
- 👤 William L. Kaiser
- 👤 Gale R. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:35
CPC Classifications
B; B27; B27G; B27G15/00; A; A61; A61B; A61B17/00; A61B17/16; A61B17/1613; A61B17/1615; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/846; A61B17/848
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
In a method for inserting a bone pin through tissue and bone, the improvement comprising: drilling through said tissue and bone with a bone pin, said bone pin having an elongated cylindrical shaft with a cutting tip at one end of said shaft, said cutting tip including a semi-cylindrical portion having a flat surface substantially coinciding with the center plane of said bone pin, said semi-cylindrical portion having a proximal end integrally connected to the shaft and a distal end having an angled cutting edge and an angled non-cutting edge converging to form a point, maintaining the maximum average bone temperature during drilling at a radial distance of 1 mm from the drill site at about 51° C. or less, and maintaining the average duration of temperature elevation above 55° C. at a radial distance of 1 mm from the drill site during drilling at about one second or less; and retaining the bone pin in the tissue and bone for a period of time for use with a suitable external fixation device.
Claim 2
Dependent Claim
173 words
In a method for inserting a bone pin through tissue and bone, the improvement comprising: drilling through said tissue and bone with a bone pin, said bone pin having an elongated cylindrical shaft with a cutting tip at one end of said shaft, said cutting tip including a semi-cylindrical portion having a flat surface substantially coinciding with the center plane of said bone pin, said semi-cylindrical portion having a proximal end integrally connected to the shaft and a distal end having an angled cutting edge and an angled non-cutting edge converging to form a point, maintaining the maximum average bone temperature during drilling at a radial distance of 1 mm from the drill site at about 51° C. or less, and maintaining the average duration of temperature elevation above 55° C. at a radial distance of 1 mm from the drill site during drilling at about one second or less; and retaining the bone pin in the tissue and bone for a period of time for use with a suitable external fixation device.
References Cited (Backward Citations)
US385088A
Cited
US777543A
Cited
US2981127A
Cited
US3199381A
Cited
US3727611A
Cited
US3809074A
Cited
US3892232A
Cited
US4257307A
Cited
US4299212A
Cited
US4231692A
Cited
GB2043458B
Cited
US4231693A
Cited
US4265231A
Cited
US4312337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |