US4777942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bone milling instrument
Assignee: Sulzer AG
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Filing: 1987-09-24
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Granted: 1988-10-18
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Expires: 2007-09-24
Abstract
Abstract The milling instrument has a caliper which is inserted into a medullary cavity and a spindle which is linked to the caliper at an angle. The spindle carries a milling cutter as well as a guide shoe at the distal end which slides within a guideway at the distal end of the caliper. The instrument is able to cut a circular arc corresponding to the boundary line between the spongiosa and cortical tissue in the region of the calcar arc.
Inventors
- 👤 Otto Frey
- 👤 Kurt Bider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:16
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/24; B23Q35/26; A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1739; A61B17/1742; A61B17/175; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/48; B23Q35/08; B23Q35/10; B23Q35/101; B23Q35/102; A61B17/1662; A61B17/1664; A61B17/1668; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/306216; Y10T409/306384
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
76 words
A bone milling instrument comprising a caliper having a distal end for insertion in a medullary cavity of a femur and a longitudinally extending guideway; a spindle having a guide shoe at a distal end slidably mounted in said guideway and a milling cutter thereon for milling a curve in an area of a calcar arc of the femur; and means linking said spindle to said caliper to dispose said spindle angularly relative to said caliper.
Claim 2
Dependent Claim
76 words
A bone milling instrument comprising a caliper having a distal end for insertion in a medullary cavity of a femur and a longitudinally extending guideway; a spindle having a guide shoe at a distal end slidably mounted in said guideway and a milling cutter thereon for milling a curve in an area of a calcar arc of the femur; and means linking said spindle to said caliper to dispose said spindle angularly relative to said caliper.
Claim 3
Dependent Claim
37 words
A bone milling instrument as set forth in claim 1 wherein said caliper has a stem disposed on a longitudinal axis and said guideway is disposed angularly of said stem between said distal end and said stem.
Claim 4
Dependent Claim
15 words
A bone milling instrument as set forth in claim 1 wherein said means is adjustable.
Claim 5
Dependent Claim
34 words
A bone milling instrument as set forth in claim 1 wherein said means includes a bar pivotally connected at one end to said caliper and pivotally connected at an opposite end to said spindle.
Claim 6
Dependent Claim
56 words
A bone milling instrument as set forth in claim 4 wherein said means further comprises a first slide box adjustably mounted longitudinally of said caliper and pivotally connected to said one end of said bar and a second slide box adjustably mounted longitudinally of said spindle end pivotally connected to said opposite end of said bar.
Claim 7
Dependent Claim
22 words
A bone milling instrument as set forth in claim 4 wherein said bar is removably connected to said caliper and said spindle.
Claim 8
Dependent Claim
57 words
A bone milling instrument comprising a caliper for insertion in a medullary cavity of a femur, said caliper having a longitudinally extending guideway adjacent a distal end; and a rotatable spindle having a distal end slidably mounted in said guideway and a milling cutter thereon for milling in an area of a calcar arc of the femur.
Claim 9
Dependent Claim
57 words
A bone milling instrument comprising a caliper for insertion in a medullary cavity of a femur, said caliper having a longitudinally extending guideway adjacent a distal end; and a rotatable spindle having a distal end slidably mounted in said guideway and a milling cutter thereon for milling in an area of a calcar arc of the femur.
Claim 10
Dependent Claim
40 words
A bone milling instrument as set forth in claim 7 which further comprises a bar pivotally connected at one end to said caliper and pivotally connected at an opposite end to said spindle to link said spindle to said caliper.
Claim 11
Dependent Claim
54 words
A bone milling instrument as set forth in claim 7 which further comprises a first slide box adjustably mounted longitudinally of said caliper and pivotally connected to said one end of said bar and a second slide box adjustably mounted longitudinally of said spindle and pivotally connected to said opposite end of said bar.
Claim 12
Dependent Claim
37 words
A bone milling instrument as set forth in claim 9 wherein said caliper has a stem disposed on a longitudinal axis and said guideway is disposed angularly of said stem between said distal end and said stem.
Claim 13
Dependent Claim
37 words
A bone milling instrument as set forth in claim 7 wherein said caliper has a stem disposed on a longitudinal axis and said guideway is disposed angularly of said stem between said distal end and said stem.
Claim 14
Dependent Claim
29 words
A bone milling instrument as set forth in claim 7 wherein said spindle has a spherical guide shoe at said distal end for sliding and rotating in said guideway.
Claim 15
Dependent Claim
22 words
A bone milling instrument as set forth in claim 8 wherein said bar is removably connected to said caliper and said spindle.
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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) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |