US4197645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill head and bone drill
Assignee: Individual
•
Filing: 1977-06-29
•
Granted: 1980-04-15
•
Expires: 1997-06-29
Abstract
Abstract A drilling apparatus for the preparation of bone cavities includes a plurality of drills which are simultaneously driven in opposite direction with the cutting surfaces of each drill overlapping the cutting surfaces of at least one other drill to provide intersecting bone cavities. The drills may be driven by gearing located within the drill head or by gearing located in an attachment suitable for connection to a conventional drill head having a single output drive. The drills may be disposed along a straight or curved line or may be disposed in a triangular relationship with the axis of rotation of one of the drills being transversely movable relative to the axis of rotation of another drill.
Inventors
- 👤 Hans M. F. Scheicher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:58
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1662; A61B17/1673; A61C; A61C8/00; A61C8/0018; A61C8/0037; A61C8/0043; A61C8/0089; B; B23; B23Q; B23Q5/00; B23Q5/02; B23Q5/04; A61B17/1613; A61B17/1615; A61B17/1622; A61B17/1624; A61B17/1659; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/38
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
A drilling apparatus for the preparation of bone cavities comprising a drill head having drive means therein, at least two drills each having a shank and gear means operatively connecting said shanks to said drive means for simultaneously rotating said drills in opposite directions, each of said drills having cutting surfaces defining an area of rotation which overlaps the area of rotation of at least one other drill to provide intersecting bone cavities.
Claim 2
Dependent Claim
73 words
A drilling apparatus for the preparation of bone cavities comprising a drill head having drive means therein, at least two drills each having a shank and gear means operatively connecting said shanks to said drive means for simultaneously rotating said drills in opposite directions, each of said drills having cutting surfaces defining an area of rotation which overlaps the area of rotation of at least one other drill to provide intersecting bone cavities.
Claim 3
Dependent Claim
47 words
A drilling apparatus as set forth in claim 1, wherein said drive means includes a drive shaft having an axis of rotation extending longitudinally of said head and the axes of said drills are disposed perpendicular to and in line along the axis of said drive shaft.
Claim 4
Dependent Claim
43 words
A drilling apparatus as set forth in claim 1, wherein said drive means includes a drive shaft having an axis extending longitudinally of said head with the axes of said drills disposed in a line perpendicular to the axis of said drive shaft.
Claim 5
Dependent Claim
67 words
A drilling apparatus as set forth in claim 1, wherein said drive means includes a shaft having a bevel gear connected to the end thereof in said head and said gear means includes a complimentary bevel gear operably connected to the shank of one of said drills and pinion gear means operatively interconnecting said one of said drills with the other of said drills for simultaneous rotation.
Claim 6
Dependent Claim
40 words
A drilling apparatus as set forth in claim 4, wherein the shanks of three drills are interconnected by said pinion gear means for simultaneous rotation with the axes of rotation of said three drills being disposed in a straight line.
Claim 7
Dependent Claim
40 words
A drilling apparatus as set forth in claim 4, wherein the shanks of three drills are interconnected by said pinion gear means for simultaneous rotation with the axis of rotation of said three drills being disposed in a triangular configuration.
Claim 8
Dependent Claim
67 words
A drilling apparatus as set forth in claim 4, further comprising means for mounting one of said drills for lateral movement relative to another of said drills so that the axis of rotation of said one of said drills is movable along a circular path the center of which is the axis of rotation of said another of said drills while maintaining said drills in driving relation.
Claim 9
Dependent Claim
23 words
A drilling apparatus as set forth in claim 4, wherein said bevel gears and said pinion gears are all disposed within said head.
Claim 10
Dependent Claim
29 words
A drilling apparatus as set forth in claim 4, wherein said bevel gears are disposed within said head and said pinion gear means are located outside of said head.
Claim 11
Dependent Claim
36 words
A drilling apparatus as set forth in claim 9, further comprising an auxiliary support detachably connected to said head, means for rotatably mounting at least one of said shanks of said drills in said auxiliary support.
Claim 12
Dependent Claim
32 words
A drilling apparatus as set forth in claim 10, wherein the shank of another of said drills extends through said auxiliary support into said housing in driving engagement with said drive means.
Claim 13
Dependent Claim
42 words
A drilling apparatus as set forth in claim 11, wherein said auxiliary support is adjustably mounted for rotation about the axis of said shank of said another drill and means for securing said auxiliary support in adjusted position relative to said housing.
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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) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |