EP0636346A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Device for preventive support of the femur
Assignee: Individual
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Filing: 1993-07-23
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Granted: —
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Expires: 2013-07-23
Abstract
Abstract Hip joints are reinforced preventively by a device composed of a tubular element (5) fashioned from biocompatible material, accommodated by a socket (6) drilled in the femoral bone (1) parallel with and ajacent to an axis (X1) connecting the ball (2) and the diaphysis (4), and two independent locking assemblies (7, 8) operating unidirectionally and in mutual opposition, also of biocompatible material, by which the tubular element (5) can be deformed and manipulated in such a manner as to lodge stably in the surrounding bone tissue of the socket (6), establishing a load-bearing axis (A) that functions as a bridge between the weaker axis (X1) and the main axis (X2) of the femur.
Inventors
- 👤 Massimo Santangelo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 23:28
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/74; A61B17/742; A61B17/72; A61B17/7233; A61B17/7258; A61B17/7266; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30518; A61F2002/3052; A61F2220/00; A61F2220/0025; Y; Y10; Y10S; Y10S606/00; Y10S606/907
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
169 words
A device for preventive support of the femur, in particular the extremity of a femoral bone (1) consisting in a ball (2) associated with a neck portion (3) extending along a first axis (X1) disposed at an angle (α) relative to a rectilinear second axis (X2) substantially coinciding with that of the femoral diaphysis (4) to which the neck portion is attached, characterized, in that it comprises: - a tubular element (5) fashioned in biocompatible material, stably insertable into a blind socket (6) created in the femoral bone (1) parallel with and in the region of the first axis (X1); - first and second locking means (7, 8) fashioned in biocompatible material, operating unidirectionally and in mutual opposition, and designed to determine a partial variation in the external shape of the tubular element (5) such as will allow of securing the tubular element stably against the bone surface of the socket (6) and establishing a load-bearing axis (A) that bridges the first axis (X1) and the second axis (X2).
Claim 2
Dependent Claim
113 words
A device as in claim 1, wherein the first locking means (7) consist in a tapered expansion pin (9), insertable coaxially and helically into the tubular element (5) to assume a position interposed between one end (5b) of the tubular element and the second locking means (8), of which the position internally of the tubular element (5) is determined by screw means (10) occupying the remaining end (5a) of the tubular element, rigidly associated with a cap (11) serving to block the corresponding end (5a) of the tubular element and disposed facing the inserted end (9a) of the tapered pin (9), which affords a threaded hole (12) for coupling to the screw means.
Claim 3
Dependent Claim
68 words
A device as in claim 2, wherein the wall of the tubular element (5) is embodied with a plurality of longitudinal cuts (13), uniformly distributed in the angular direction, such that the effect of screwing the tapered pin (9) toward the cap (11) is to induce a deformation whereby at least one end portion of the tubular element (5) is restrained axially in relation to the socket (6).
Claim 4
Dependent Claim
45 words
A device as in claim 2, wherein the end of the tapered pin (9) remote from the end (9a) affording the threaded hole (12) is embodied with a travel limiting shoulder (14) designed to abut with the corresponding end (5b) of the tubular element (5).
Claim 5
Dependent Claim
100 words
A device as in claim 2, wherein the second locking means (8) comprise a set of deformable prongs (15) permanently anchored at one end to a ring (16) inserted into the tubular element (5) and affording a central hole (17) to admit the screw means (10), also a circular expansion cone (19), interposed between the ring (16) and the tapered pin (9) and affording a central threaded hole (20), by which the prongs (15) are spread apart forcibly one from another and caused to project through and beyond respective slots (18) afforded by the wall of the tubular element (5).
Claim 6
Dependent Claim
45 words
A device as in claim 5, wherein the prongs (15) are at least three in number and distributed uniformly around the axis of the tubular element (5), each affording a sharp edge (21) at the end remote from the end anchored to the ring (16).
References Cited (Backward Citations)
US2699774A
Cited
DE2260839B1
Cited
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