Patent US5156628A successfully refreshed from Google Patents.
US5156628A
Expired / Lapsed
US
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Shaft prosthesis
Assignee: Johnson and Johnson Professional Products GmbH
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Filing: 1991-12-04
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Granted: 1992-10-20
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Expires: 2011-12-04
Abstract
Abstract A prosthesis includes a tubular, curved shaft having a shaft cavity, a length, proximal and distal ends; and an outer diameter and a wall thickness both decreasing towards the distal end. The shaft cavity is closed throughout, and the tubular shaft has, in a zone of the distal end, a flattened, essentially plate-shaped wall portion having a length coextensive with the length of the shaft, and a thickness of approximately between 0.5 and 1.5 mm.
Inventors
- 👤 Curt Kranz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:32
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F5/00; A61F2/30767; A61F2/30771; A61F2/3662; A61F2/367; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30014; A61F2002/30316; A61F2002/30317; A61F2002/30322; A61F2002/30324; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30451; A61F2002/30535; A61F2002/30593; A61F2002/30878; A61F2002/30891; A61F2002/30894; A61F2/3094; A61F2002/30975; A61F2/3609; A61F2002/3625; A61F2002/365; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/0058; A61F2250/00; A61F2250/0014; A61F2250/0026; A61F2250/0029; A61F2250/0036; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
83 words
In a prosthesis including a tubular, curved shaft having a shaft cavity, a length, proximal and distal ends; said shaft having an outer diameter and a wall thickness both decreasing towards the distal end; the improvement wherein said shaft cavity is closed throughout and further wherein said tubular shaft has, in a zone of the distal end, a flattened, essentially plate-shaped wall portion having a length coextensive with the length of the shaft, and a thickness of approximately between 0.5 and 1.5 mm.
Claim 2
Dependent Claim
83 words
In a prosthesis including a tubular, curved shaft having a shaft cavity, a length, proximal and distal ends; said shaft having an outer diameter and a wall thickness both decreasing towards the distal end; the improvement wherein said shaft cavity is closed throughout and further wherein said tubular shaft has, in a zone of the distal end, a flattened, essentially plate-shaped wall portion having a length coextensive with the length of the shaft, and a thickness of approximately between 0.5 and 1.5 mm.
Claim 3
Dependent Claim
25 words
A prosthesis as defined in claim 1, wherein the length portion of said plate-shaped wall portion is approximately one third the length of said shaft.
Claim 4
Dependent Claim
26 words
A prosthesis as defined in claim 1, wherein said shaft has, along said plate-shaped wall portion, the shape of a tube of essentially semicircular cross section.
Claim 5
Dependent Claim
21 words
A prosthesis as defined in claim 1, wherein said shaft is formed of two longitudinal half shells secured to one another.
Claim 6
Dependent Claim
33 words
A prosthesis as defined in claim 1, wherein said shaft is curved and has an inner, medial part and an outer, lateral part; said plate-shaped wall portion being situated in said medial part.
Claim 7
Dependent Claim
59 words
A prosthesis as defined in claim 5, wherein said plate-shaped wall portion has a substantially uniform wall thickness and further wherein the medial part has a portion adjoining said plate-shaped wall portion and having a length substantially one half of the length of said plate-shaped wall portion; said portion of said medial part having a continuously decreasing wall thickness.
Claim 8
Dependent Claim
71 words
A prosthesis as defined in claim 1, wherein said shaft has a first length portion situated between said plate-shaped wall portion and said proximal end; a second length portion situated between said first length portion and said distal end and including said plate-shaped wall portion; said shaft having a cross-sectional area decreasing in said first length portion at a greater rate towards said distal end than in said second length portion.
Claim 9
Dependent Claim
46 words
A prosthesis as defined in claim 7, wherein said shaft has a longitudinal axis and further wherein said plate-shaped wall portion has a steeper inclination relative to said longitudinal axis towards said distal end than a shaft length portion situated diametrically opposite said plate-shaped wall portion.
Claim 10
Dependent Claim
16 words
A prosthesis as defined in claim 1, wherein said shaft has a profiled outer surface portion.
Claim 11
Dependent Claim
24 words
A prosthesis as defined in claim 9, wherein said profiled outer surface portion comprises a plurality of spacedly distributed nubs having a spherical surface.
Claim 12
Dependent Claim
60 words
A prosthesis as defined in claim 10, wherein said shaft has a non-profiled surface adjoining said profiled outer surface portion; said non-profiled surface having a surface contour situated at least as high as the highest elevation of said nubs; the profiled outer surface portion having a depth whose ratio to the wall thickness of the shaft is less than 1:4.
Claim 13
Dependent Claim
39 words
A prosthesis as defined in claim 9, wherein said shaft has a Shenton's arch; and further wherein said profiled outer surface portion extends in a region of Shenton's arch parallel to a plane of maximum curvature of the shaft.
Claim 14
Dependent Claim
21 words
A prosthesis as defined in claim 12, wherein a profiled outer surface portion is provided on opposite sides of said shaft.
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) | 1995-10-20 | 1996-04-20 | 1996-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-20 | 2000-04-20 | 2000-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-20 | 2004-04-20 | 2004-10-20 | $7700.00 | Window Closed / Lapsed |