US4751922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible medullary reamer
Assignee: Howmedica Osteonics Corp
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Filing: 1986-06-27
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Granted: 1988-06-21
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Expires: 2006-06-27
Abstract
Abstract An improved flexible medullary reamer for shaping the medullary space of bones. The shaft is comprised of a single solid element. To permit the use of an elongated guide element, the shaft may be axially bored throughout its length. Attached to the shaft's opposite ends respectively, a cutting head and a means of connecting the shaft to a drive mechanism. To compliment the shaft, said cutting head and connecting means may be centrally bored.
Inventors
- 👤 Al DiPietropolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:04
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/164; B; B23; B23Q; B23Q5/00; B23Q5/02; B23Q5/04; B23Q5/043; A61B17/1613; A61B17/1615; A61B17/1617; A61B17/1631
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
87 words
In a flexible medullary rotational reamer for clearing, enlarging or otherwise modifying the medullary space of bones, having a flexible shaft with a cutting head at one end and an adaptor piece at its opposite end for connecting said shaft to a rotational drive element thereby causing rotation of the shaft, said shaft having a small diameter axial bore throughout its length to receive an elongated guide element, the improvement comprising: said flexible shaft being comprised of a material from the group consisting of carbon fiber composites.
Claim 2
Dependent Claim
87 words
In a flexible medullary rotational reamer for clearing, enlarging or otherwise modifying the medullary space of bones, having a flexible shaft with a cutting head at one end and an adaptor piece at its opposite end for connecting said shaft to a rotational drive element thereby causing rotation of the shaft, said shaft having a small diameter axial bore throughout its length to receive an elongated guide element, the improvement comprising: said flexible shaft being comprised of a material from the group consisting of carbon fiber composites.
Claim 3
Dependent Claim
67 words
In a flexible medullary rotational reamer for clearing, enlarging or otherwise modifying the medullary space of bones, having a flexible shaft with a cutting head at one end and an adaptor piece at its opposite end for connecting said shaft to a rotational drive element thereby causing rotation of the shaft, said shaft being comprised of a material from the group consisting of thermoplastics and composites thereof.
Claim 4
Dependent Claim
67 words
In a flexible medullary rotational reamer for clearing, enlarging or otherwise modifying the medullary space of bones, having a flexible shaft with a cutting head at one end and an adaptor piece at its opposite end for connecting said shaft to a rotational drive element thereby causing rotation of the shaft, said shaft being comprised of a material from the group consisting of thermoplastics and composites thereof.
Claim 5
Dependent Claim
21 words
The flexible medullary rotational reamer of claim 1 wherein said shaft is formed by extrusion, pultrusion, molding, laminating, machining or bonding.
Claim 6
Dependent Claim
23 words
The flexible medullary rotational reamer of claim 1 wherein at least one of said adaptor and cutting head is secured to said shaft.
Claim 7
Dependent Claim
65 words
A flexible medullary rotational reamer for clearing, enlarging or otherwise modifying the medullary space of bones, comprising: a flexible monolithic shaft comprised of a material from the group consisting of fiber reinforced composites, said shaft with a rotational cutting head at one end thereof and a rotational drive coupling at an opposite end thereof, said shaft having an axial bore for accepting a guide element.
Claim 8
Dependent Claim
65 words
A flexible medullary rotational reamer for clearing, enlarging or otherwise modifying the medullary space of bones, comprising: a flexible monolithic shaft comprised of a material from the group consisting of fiber reinforced composites, said shaft with a rotational cutting head at one end thereof and a rotational drive coupling at an opposite end thereof, said shaft having an axial bore for accepting a guide element.
Claim 9
Dependent Claim
59 words
A flexible medullary rotational reamer for clearing, enlarging or otherwise modifying the medullary space of bones, comprising: a flexible monolithic shaft comprised of a synthetic plastic material, said shaft with a rotational cutting head at one end thereof and a rotational drive coupling at an opposite end thereof, said shaft having an axial bore for accepting a guide element.
Claim 10
Dependent Claim
59 words
A flexible medullary rotational reamer for clearing, enlarging or otherwise modifying the medullary space of bones, comprising: a flexible monolithic shaft comprised of a synthetic plastic material, said shaft with a rotational cutting head at one end thereof and a rotational drive coupling at an opposite end thereof, said shaft having an axial bore for accepting a guide element.
Claim 11
Dependent Claim
27 words
The flexible medullary rotational reamer of claim 5 or claim 6 wherein said shaft is comprised of a material from the group consisting of thermoplastics and thermosets.
Claim 12
Dependent Claim
23 words
The flexible medullary rotational reamer of claim 5 or claim 6 wherein said shaft has an axial bore for accepting a guide element.
Claim 13
Dependent Claim
26 words
The flexible medullary rotational reamer of claim 5 or claim 6 wherein said shaft is formed by extrusion, pultrusion, molding, laminating, wrapping, braiding, machining or bonding.
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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) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |