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US4743263A
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Adaptable isoelastic hip-endoprosthesis
Assignee: Czech Technical University in Prague
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Filing: 1985-09-24
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Granted: 1988-05-10
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Expires: 2005-09-24
Abstract
Abstract Adaptable isoelastic hip endoprosthesis comprising a joint piece connected to a shaft of the endoprosthesis which shaft is to be implanted in the femur, said shaft being composed of at least two spirally twisted elastic rods. Such rods can be of the same cross section, can have a variable cross section, and can have the same or different lengths.
Inventors
- 👤 Miroslav Petrtyl
- 👤 Rudolf Pavlansky
- 👤 Jaroslav Valenta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:53
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3662; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30289; A61F2002/30316; A61F2002/30535; A61F2002/30563; A61F2002/30565; A61F2002/30579; A61F2002/30593; A61F2002/30602; A61F2/30767; A61F2/30771; A61F2002/3085; A61F2002/30851; A61F2/3609; A61F2002/3625; A61F2002/3631; A61F2002/3678; A61F2002/3698; A61F2230/00; A61F2230/0063; A61F2230/0091
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
Adaptable isoelastic hip endoprosthesis for insertion into a prepared cavity comprising a joint part connected to a shaft of the endoprosthesis, said shaft of the endoprosthesis being composed of at least two spirally twisted elastic rods having a turn larger than the diameter of said cavity whereby upon insertion of said shaft into said cavity prestresses said elastic rods in a radial direction thereby allowing said rods to adjust to the anatomical shape of said cavity; wherein the spirally twisted elastic rods have a variable cross section and are provided at their lower end with stabilization bodies.
Claim 2
Dependent Claim
97 words
Adaptable isoelastic hip endoprosthesis for insertion into a prepared cavity comprising a joint part connected to a shaft of the endoprosthesis, said shaft of the endoprosthesis being composed of at least two spirally twisted elastic rods having a turn larger than the diameter of said cavity whereby upon insertion of said shaft into said cavity prestresses said elastic rods in a radial direction thereby allowing said rods to adjust to the anatomical shape of said cavity; wherein the spirally twisted elastic rods have a variable cross section and are provided at their lower end with stabilization bodies.
Claim 3
Dependent Claim
101 words
Adaptable isoelastic hip endoprosthesis for insertion into a prepared cavity comprising a joint part connected to a shaft of the endoprosthesis, said shaft of the endoprosthesis being composed of at least two spirally twisted elastic rods having a turn larger than the diameter of said cavity whereby upon insertion of said shaft into said cavity prestresses said elastic rods in a radial direction thereby allowing said rods to adjust to the anatomical shape of said cavity; wherein the spirally twisted elastic rods have a variable cross section, are of unequal length, and are provided at their lower end with stabilization bodies.
Claim 4
Dependent Claim
101 words
Adaptable isoelastic hip endoprosthesis for insertion into a prepared cavity comprising a joint part connected to a shaft of the endoprosthesis, said shaft of the endoprosthesis being composed of at least two spirally twisted elastic rods having a turn larger than the diameter of said cavity whereby upon insertion of said shaft into said cavity prestresses said elastic rods in a radial direction thereby allowing said rods to adjust to the anatomical shape of said cavity; wherein the spirally twisted elastic rods have a variable cross section, are of unequal length, and are provided at their lower end with stabilization bodies.
Claim 5
Dependent Claim
109 words
Adaptable isoelastic hip endoprosthesis comprising a joint part connected to a shaft of the endoprosthesis for insertion into a prepared cavity, said shaft of the endoprosthesis being composed of at least two spirally twisted elastic rods having a turn larger than the diameter of said cavity whereby upon insertion of said shaft into said cavity prestresses said elastic rods in a radial direction thereby allowing said rods to adjust to the anatomical shape of said cavity; wherein the spirally twisted elastic rods have a variable cross section, are of unequal length, and are provided at their lower end with stabilization bodies and are firmly connected at said lower ends.
Claim 6
Dependent Claim
109 words
Adaptable isoelastic hip endoprosthesis comprising a joint part connected to a shaft of the endoprosthesis for insertion into a prepared cavity, said shaft of the endoprosthesis being composed of at least two spirally twisted elastic rods having a turn larger than the diameter of said cavity whereby upon insertion of said shaft into said cavity prestresses said elastic rods in a radial direction thereby allowing said rods to adjust to the anatomical shape of said cavity; wherein the spirally twisted elastic rods have a variable cross section, are of unequal length, and are provided at their lower end with stabilization bodies and are firmly connected at said lower ends.
References Cited (Backward Citations)
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Cited
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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) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |