US4586497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill fixation device and method for vertebra cutting
Assignee: Individual
•
Filing: 1983-10-31
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Granted: 1986-05-06
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Expires: 2003-10-31
Abstract
Abstract A drill fixation device (F) to adapt a high speed drill (D) for use in vertebra drilling and cutting. The device includes a carrier (16) mounting the drill (D) for guided movement relative to a base (14) and a squeeze grip (22-24) connected between the base (14) and carrier (16) to enable a surgeon to selectively impart such movement to the drill. A foot plate (50) is fixed relative to the base (14) in spaced relationship to the carrier (16) so as to be in the path of the bit (12) of a drill (D) mounted on the carrier (16). In use, the foot plate (50) is positioned beneath the bone material to be cut to apply counterforce to the bone material as the drill cuts and shield nerve tissue from harm by the bit.
Inventors
- 👤 David J. Dapra
- 👤 John B. Clementi
- 👤 Robert J. Morelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:19
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/16; A61B17/1662; A61B17/1671; A61B90/00; A61B90/08; A61B2090/0801; A61B2090/08021
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
131 words
A device to position a high-speed rotary bone cutter relative to the bone tissue being cut, said device comprising: a base having a first grip attached thereto; a carrier with a fixture means for securing a rotary cutter thereto; mounting means connecting said base and said carrier for guided relative movement therebetween; a second grip, connected to the carrier and cooperating with said first grip to enable an operator of the device to selectively impart said movement by squeezing said first and second grips; a foot plate fixedly connected to said base and engageable with bone tissue to be cut to place said tissue in the path of said rotary cutter between the cutter and the plate, and wherein squeezing said grips impinges said cutter on said tissue when so placed.
Claim 2
Independent Claim
131 words
A device to position a high-speed rotary bone cutter relative to the bone tissue being cut, said device comprising: a base having a first grip attached thereto; a carrier with a fixture means for securing a rotary cutter thereto; mounting means connecting said base and said carrier for guided relative movement therebetween; a second grip, connected to the carrier and cooperating with said first grip to enable an operator of the device to selectively impart said movement by squeezing said first and second grips; a foot plate fixedly connected to said base and engageable with bone tissue to be cut to place said tissue in the path of said rotary cutter between the cutter and the plate, and wherein squeezing said grips impinges said cutter on said tissue when so placed.
Claim 3
Dependent Claim
38 words
A device according to claim 1 wherein said mounting means connects the carrier to the base for rectilinear movement towards and away from the foot plate and includes a stop to limit movement away from the foot plate.
Claim 4
Dependent Claim
44 words
A device according to claim 1 wherein the first grip comprises a finger engageable portion fixed to and extending generally perpendicular from the base and said second grip is in apposition to the first grip and adapted to be engaged by an operator's palm.
Claim 5
Dependent Claim
17 words
A device according to claim 3 further comprising means resiliently biasing the first and second grips apart.
Claim 6
Dependent Claim
28 words
A device according to claim 1 wherein said foot plate is carried by an extension connected to and extending generally parallel to the path of said guide movement.
Claim 7
Dependent Claim
34 words
A device according to claim 5 wherein the extension has a distal end proportioned to extend adjacent said cutter and the foot plate extends from said end toward the path of said guided movement.
Claim 8
Dependent Claim
28 words
A device according to claim 5 further comprising means to selectively release the extension from the base to enable the foot plate to be removed from the base.
Claim 9
Dependent Claim
16 words
A device according to claim 5 wherein the foot plate converges to a thin distal edge.
Claim 10
Dependent Claim
129 words
In combination with a motor having a stationary body with a rotationally driven bit extending from one end thereof, a rotary cutting device comprising: a carrier fixedly secured to said body in a disposition wherein the bit extends longitudinally relative thereof; a base; means mounting the carrier on the base for guided longitudinal movement relative thereto; a squeeze grip connected between the base and carrier to impart said relative movement to the carrier; and a foot plate connected to the base in spaced relationship to the carrier and the bit, said foot plate being aligned with the path through which the bit moves upon longitudinal movement of the carrier relative to the base so as to impinge said bit into a workpiece entrapped between said foot plate and bit.
Claim 11
Dependent Claim
129 words
In combination with a motor having a stationary body with a rotationally driven bit extending from one end thereof, a rotary cutting device comprising: a carrier fixedly secured to said body in a disposition wherein the bit extends longitudinally relative thereof; a base; means mounting the carrier on the base for guided longitudinal movement relative thereto; a squeeze grip connected between the base and carrier to impart said relative movement to the carrier; and a foot plate connected to the base in spaced relationship to the carrier and the bit, said foot plate being aligned with the path through which the bit moves upon longitudinal movement of the carrier relative to the base so as to impinge said bit into a workpiece entrapped between said foot plate and bit.
Claim 12
Dependent Claim
28 words
A combination according to claim 9 wherein said foot plate is carried by an extension connected to and extending generally parallel to the path of said guided movement.
Claim 13
Dependent Claim
16 words
A combination according to claim 10 wherein the foot plate converges to a thin distal edge.
Claim 14
Independent Claim
70 words
A method of cutting bone tissue comprising the steps of: mounting a rotationally driven cutter bit for guided movement toward a foot plate, providing squeezable means for actuating said guided movement, positioning said bone tissue in engagement with said foot plate within the extent of said guided movement, and manually squeezing said squeezable means to advance said rotating cutter bit into engagement with said bone tissue and thereby cutting same.
Claim 15
Independent Claim
70 words
A method of cutting bone tissue comprising the steps of: mounting a rotationally driven cutter bit for guided movement toward a foot plate, providing squeezable means for actuating said guided movement, positioning said bone tissue in engagement with said foot plate within the extent of said guided movement, and manually squeezing said squeezable means to advance said rotating cutter bit into engagement with said bone tissue and thereby cutting same.
Claim 16
Dependent Claim
52 words
A method according to claim 12, further comprising the step of applying a retaining force simultaneously with the step of squeezing, and retaining force comprising pulling said foot plate against the tissue to be cut to thereby reduce any tendency of said foot plate to slip from engagement with said bone tissue.
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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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |