US4895572A
Expired / Lapsed
US
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Interlocking femoral prosthesis device
Assignee: Individual
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Filing: 1988-11-25
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Granted: 1990-01-23
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Expires: 2008-11-25
Abstract
Abstract The present invention relates to a new and improved design for a device utilized as an interlocking femoral prosthesis under medical circumstances wherein either the femoral bone is fractured or there exists total hip failure requiring a hip replacement. By having the interlocking femoral prosthesis device be of an overall length, as in the case of a fracture, such that the lower portion of said device extends below the point of fracture of said femur and by utilizing three surgical screws for securing the interlocking femoral prosthesis within the femur canal, two of said screws passing distally through two elliptical holes formed within the interlocking femoral prosthesis, same being located below the fracture line of said femur when said device is implanted as related to a fracture situation and one of said screws passing proximally through one circular hole formed within the interlocking femoral prosthesis, at its upper portion which is positioned as in the case of a fracture, above the location of said fracture, when said device is implanted as related to a fracture situation, there is achieved the overall objects and advantages of the invention. Additionally, by having that portion of the device that is adjacent to the upper circular hole formed therein by of a porous construction, there is further achieved additional means for said device to anchor itself during the healing process to the femoral bone.
Inventors
- 👤 Ira Chernoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:15
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/84; A61B17/86; A61B17/8625; A61B17/863; A61F2/30721; A61F2/30749; A61F2/30767; A61F2/3607; A61F2/3662; A61F2/367; A61F2/3676; A61F2/28; A61F2002/2825; A61F2002/2835; A61F2/30771; A61F2002/30772; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/3678; A61F2002/368; A61F2220/00; A61F2220/0008
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
161 words
An interlocking femoral prosthesis capable of implanting within the human body, wherein said interlocking femoral prosthesis comprises: (a) a spherical shaped member structurally affixed to an arched cylindrical neck member, said arched cylindrical neck member being structurally affixed to a blunted shaft member, there being formed through said arched cylindrical neck member a singular circular opening, the axis of said circular opening passing through the center axis of said arched cylindrical shaft member there being formed through the lower portion of said blunted shaft member a first elliptical opening spaced from a second elliptical opening, said elliptical openings having the axis of each of said elliptical openings being parallel to each other and perpendicular to the axis of said circular opening; (b) a first screw member capable of insertion through said singular circular opening; (c) a second screw member capable of insertion through said first elliptical opening; and (d) a third screw member capable of insertion through said second elliptical opening.
Claim 2
Dependent Claim
161 words
An interlocking femoral prosthesis capable of implanting within the human body, wherein said interlocking femoral prosthesis comprises: (a) a spherical shaped member structurally affixed to an arched cylindrical neck member, said arched cylindrical neck member being structurally affixed to a blunted shaft member, there being formed through said arched cylindrical neck member a singular circular opening, the axis of said circular opening passing through the center axis of said arched cylindrical shaft member there being formed through the lower portion of said blunted shaft member a first elliptical opening spaced from a second elliptical opening, said elliptical openings having the axis of each of said elliptical openings being parallel to each other and perpendicular to the axis of said circular opening; (b) a first screw member capable of insertion through said singular circular opening; (c) a second screw member capable of insertion through said first elliptical opening; and (d) a third screw member capable of insertion through said second elliptical opening.
Claim 3
Dependent Claim
39 words
An interlocking femoral prosthesis capable of implanting within the human body, wherein said interlocking femoral prosthesis is of unitary construction as described in claim 1 wherein said arched cylindrical neck member is of a porous structure about its surface.
Claim 4
Independent Claim
409 words
The method of implanting an interlocking femoral prosthesis within the femur of the human body for purposes of assisting in the healing of a fracture thereof wherein said interlocking femoral prosthesis is of a unitary construction having formed at one end thereof a spherical shaped member structurally affixed to an arched cylindrical neck member, said arched cylindrical neck member being structurally affixed to a blunted shaft member, there being formed through said arched cylindrical neck member a singular circular opening, the axis of said circular opening passing through the center axis of said arched cylindrical shaft member and there being formed through the lower portion of said blunted shaft member a pair of spaced elliptical openings the axis of each said pair of spaced elliptical openings being parallel to each other and perpendicular to the axis of said circular opening, comprising the steps of: (a) Inserting into the femoral canal of said blunted shaft member of said interlocking femoral prosthesis as well as said arched cylindrical neck member such that said pair of spaced elliptical openings formed through the lower portion of said blunted shaft member of said interlocking femoral prosthesis are located below the point of fracture of said femur while said singular circular opening formed through said arched cylindrical neck member of said interlocking femoral prosthesis occurs above said point of fracture of said femur; (b) Aligning said interlocking femoral prosthesis about the vertical axis of said blunted shaft member of said interlocking femoral prosthesis such that the singular circular opening formed through said arched cylindrical neck member is capable of receiving a surgical screw therethrough such that said surgical screw passes through said arched cylindrical neck member of said interlocking femoral prosthesis proximally to said femur while said pair of spaced elliptical openings formed through said lower portion of said blunted shaft member of said interlocking femoral prosthesis are each capable of receiving a surgical screw therethrough such that each of said surgical screws pass through said blunted shaft member of said interlocking femoral prosthesis distally to said femur; (c) Placing of a surgical screw through body tissue proximally to said femur and through said circular opening formed through said arched cylindrical neck member of said interlocking femoral prosthesis; and (d) Placing of a pair of surgical screws through body tissue distally to said femur and through each of said pair of spaced elliptical openings formed through said blunted shaft member of said interlocking femoral prosthesis.
Claim 5
Independent Claim
409 words
The method of implanting an interlocking femoral prosthesis within the femur of the human body for purposes of assisting in the healing of a fracture thereof wherein said interlocking femoral prosthesis is of a unitary construction having formed at one end thereof a spherical shaped member structurally affixed to an arched cylindrical neck member, said arched cylindrical neck member being structurally affixed to a blunted shaft member, there being formed through said arched cylindrical neck member a singular circular opening, the axis of said circular opening passing through the center axis of said arched cylindrical shaft member and there being formed through the lower portion of said blunted shaft member a pair of spaced elliptical openings the axis of each said pair of spaced elliptical openings being parallel to each other and perpendicular to the axis of said circular opening, comprising the steps of: (a) Inserting into the femoral canal of said blunted shaft member of said interlocking femoral prosthesis as well as said arched cylindrical neck member such that said pair of spaced elliptical openings formed through the lower portion of said blunted shaft member of said interlocking femoral prosthesis are located below the point of fracture of said femur while said singular circular opening formed through said arched cylindrical neck member of said interlocking femoral prosthesis occurs above said point of fracture of said femur; (b) Aligning said interlocking femoral prosthesis about the vertical axis of said blunted shaft member of said interlocking femoral prosthesis such that the singular circular opening formed through said arched cylindrical neck member is capable of receiving a surgical screw therethrough such that said surgical screw passes through said arched cylindrical neck member of said interlocking femoral prosthesis proximally to said femur while said pair of spaced elliptical openings formed through said lower portion of said blunted shaft member of said interlocking femoral prosthesis are each capable of receiving a surgical screw therethrough such that each of said surgical screws pass through said blunted shaft member of said interlocking femoral prosthesis distally to said femur; (c) Placing of a surgical screw through body tissue proximally to said femur and through said circular opening formed through said arched cylindrical neck member of said interlocking femoral prosthesis; and (d) Placing of a pair of surgical screws through body tissue distally to said femur and through each of said pair of spaced elliptical openings formed through said blunted shaft member of said interlocking femoral prosthesis.
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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) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |