Patent US3292625A successfully refreshed from Google Patents.
US4265231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curved drill attachment for bone drilling uses
Assignee: Individual
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Filing: 1979-04-30
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Granted: 1981-05-05
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Expires: 1999-04-30
Abstract
Abstract An attachment for a drill has a cannula attachable to the drill motor and provided with a curved distal portion. A flexible shaft extends through the cannula with a burr connected to its distal end and with its proximal end connectable to the drill motor to be rotated thereby.
Inventors
- 👤 Arnold D. Scheller, Jr.
- 👤 Thomas B. Quigley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:25
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320016; A61B17/32002; A61B17/16; A61B17/1642; A61B17/1613; A61B17/1631; A61B2017/320032
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
208 words
A drilling attachment for a drill motor having rotatable means operable to grip or release a burr or drill, said attachment for use in surgical procedures requiring a passageway through bone with the ends of the passageway not in alignment, said attachment including a rigid cannula including a proximal end portion a having a longitudinal axis, said proximal end portion being attachable to the housing of a drill motor and freely receptive of the gripping means thereof, a curved intermediate portion of said cannula extending radially with respect to said longitudinal axis, and a curved distal portion of said cannula lying in a plane which is perpendicular to said longitudinal axis of said proximal portion and substantially concentric with respect to said axis, a bone-cutting burr exposed at the distal end of said distal portion, and a burr-rotating flexible shaft within said cannula, said shaft being anchored to said burr at said distal end and attached to a rod at said proximal end, which rod is connectable to said rotatable gripping means of said drill motor, whereby said drilling attachment and said burr are dimensioned in such fashion that when used a passageway is provided through a bone appropriate for the passage of a curved surgical needle therethrough.
Claim 2
Dependent Claim
208 words
A drilling attachment for a drill motor having rotatable means operable to grip or release a burr or drill, said attachment for use in surgical procedures requiring a passageway through bone with the ends of the passageway not in alignment, said attachment including a rigid cannula including a proximal end portion a having a longitudinal axis, said proximal end portion being attachable to the housing of a drill motor and freely receptive of the gripping means thereof, a curved intermediate portion of said cannula extending radially with respect to said longitudinal axis, and a curved distal portion of said cannula lying in a plane which is perpendicular to said longitudinal axis of said proximal portion and substantially concentric with respect to said axis, a bone-cutting burr exposed at the distal end of said distal portion, and a burr-rotating flexible shaft within said cannula, said shaft being anchored to said burr at said distal end and attached to a rod at said proximal end, which rod is connectable to said rotatable gripping means of said drill motor, whereby said drilling attachment and said burr are dimensioned in such fashion that when used a passageway is provided through a bone appropriate for the passage of a curved surgical needle therethrough.
Claim 3
Dependent Claim
23 words
The drilling attachment of claim 1 in which the concentrically curved distal portion of the cannula subtends an arc approximately 180° in extent.
Claim 4
Dependent Claim
43 words
The drilling attachment of claim 1 in which the flexible shaft includes a stretched coiled spring which spring is of the hand relative to the direction the shaft is rotated by the drill motor to effect the application of torque to the burr.
Claim 5
Dependent Claim
72 words
The drilling attachment of claim 3 in which the portion of the cannula adjacent said proximal end is of increased diameter freely to accommodate the shaft securing means of the drill motor, and the turns of the coil spring in said portion of increased diameter are also of increased diameter, said spring being so sized in length to yieldably oppose movement of said burr away from the distal end of the cannula.
Claim 6
Dependent Claim
33 words
The drilling attachment of claim 3 wherein said flexible shaft is further comprised of an internal reinforcement for the coil spring extending lengthwise thereof between the rod and the burr but unattached thereto.
Claim 7
Dependent Claim
26 words
The drilling attachment of claim 5 in which the internal reinforcement is a coil spring of the hand opposite to that of the spring it reinforces.
Claim 8
Dependent Claim
18 words
The drilling attachment of claim 5 in which the internal reinforcement is a small diameter flexible plastic rod.
Claim 9
Dependent Claim
20 words
The drilling attachment of claim 1 in which the burr diameter is in the approximate range 0.050 to 0.25 inch.
Claim 10
Dependent Claim
21 words
The drilling attachment of claim 1 in which the outside diameter of the cannular is close to that of the burr.
Claim 11
Dependent Claim
27 words
The drilling attachment of claim 1 in which the intermediate portion of the cannula is disposed so as to space the distal end from the proximal end.
Claim 12
Dependent Claim
37 words
The drilling attachment of claim 1 in which the distal end of the intermediate portion of the cannula is located at a greater radial distance from said longitudinal axis than any part of the proximal end portion.
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) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |