Patent US4473070A successfully refreshed from Google Patents.
US4473070A
Expired / Lapsed
US
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Intramedullary reamer
Assignee: MICHIGAN A CONSTITUTIONAL Corp OF MI, University of, Regents of
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Filing: 1983-01-05
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Granted: 1984-09-25
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Expires: 2003-01-05
Abstract
Abstract An intramedullary reamer comprising a tapered cylindrical body member, a groove extending along the opposite sides and across the small end of the body member, a plurality of longitudinally disposed valleys disposed in advance of the groove to facilitate removal of cutting chips and a replaceable blade adapted to fit into the groove in the body member, the cutting edge of the blade being exposed above said groove, the open end of the blade being provided with locking means to secure the blade to the body member.
Inventors
- 👤 Larry S. Matthews
- 👤 Steven A. Goldstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:49
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/164; A61B17/32; B; B23; B23D; B23D77/00; B23D77/12; Y; Y10; Y10S; Y10S408/00; Y10S408/713; Y10T; Y10T408/00; Y10T408/89; Y10T408/896; Y10T408/909
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
An intramedullary reamer comprising: a tapered cylindrical body member having a large end and a small end, the small end being rounded, a groove extending along the opposite sides and across the small end of said body member, a plurality of longitudinally disposed valleys disposed in advance of the groove to facilitate removal of cutting chips, and a blade having a right leg and a left leg joined by a connecting portion, the blade being integrally formed and adapted to fit into the groove in the body member, the cutting edge of the blade being exposed above said groove, the open end of said blade being provided with locking means to secure said blade to said body member.
Claim 2
Dependent Claim
118 words
An intramedullary reamer comprising: a tapered cylindrical body member having a large end and a small end, the small end being rounded, a groove extending along the opposite sides and across the small end of said body member, a plurality of longitudinally disposed valleys disposed in advance of the groove to facilitate removal of cutting chips, and a blade having a right leg and a left leg joined by a connecting portion, the blade being integrally formed and adapted to fit into the groove in the body member, the cutting edge of the blade being exposed above said groove, the open end of said blade being provided with locking means to secure said blade to said body member.
Claim 3
Dependent Claim
10 words
The reamer of claim 1 where said blade is replaceable.
Claim 4
Dependent Claim
34 words
The reamer of claim 1 wherein the locking means comprises projections which extend from said blade to engage the large end of said body member when said blade is fitted over said body member.
Claim 5
Dependent Claim
33 words
The reamer of claim 3 wherein the opposing outer corners of said projections are truncated to facilitate spreading of the open end of said blade for removing said blade from said body member.
Claim 6
Dependent Claim
60 words
The reamer of claim 1 additionally comprising a blade removing member which comprises a cylinder portion and a truncated cone member provided on at least one end surface of said cylinder portion, a longitudinally disposed slot extending from the surface of the cylinder portion to the center thereof, said slot extending through said cylinder portion and said truncated cone member.
Claim 7
Dependent Claim
10 words
The reamer of claim 1 wherein said blade is U-shaped.
Claim 8
Dependent Claim
43 words
The reamer of claim 1 wherein said cylindrical body member is provided with a longitudinal central bore and the distal end portion of said blade is bent so as not to block the opening in the distal end of said cylindrical body member.
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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) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |