EP0634154A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improvement in the locking among the components of a multicomponent prosthesis for use in traumatology, orthopedics and veterinary medicine
Assignee: MEC HINT Srl
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Filing: 1994-07-14
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Granted: —
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Expires: 2014-07-14
Abstract
Abstract The present invention pertains to a multicomponent prosthesis for use in traumatology, orthopedics and veterinary medicine for joint prosthesis operations, which consists of at least a first component (11, 111) and a second component (112) [sic, (12, 112) - Tr.Ed.] which are connected by a first conical coupling (15, 115; 21, 121) and a second conical coupling (23, 26; 123, 126), which is coaxial and is tapered in the opposite direction to that of the first, conical coupling The second conical coupling is formed by a conical seat (23, 123) made in the second component (12, 112) of the prosthesis, by a female friction cone (13, 113) inserted into the conical seat (11, 111) [sic, (23, 123) - Tr.Ed.] and by a locking counterscrew (14) which is screwed onto the first component and interacts axially with the female friction cone (13) in order to immobilize it in the conical seat.
Inventors
- 👤 Ennio Alessio Monfardini
- 👤 Angelo Grassi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 20:42
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3662; A61F2/367; A61F2/3609; A61F2/3676; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30143; A61F2002/30159; A61F2002/30171; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2002/30339; A61F2002/30354; A61F2002/30405; A61F2002/30433; A61F2002/30474; A61F2002/30476; A61F2002/30484; A61F2002/30494; A61F2002/30507; A61F2002/30514; A61F2002/30515; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/3054; A61F2002/30594; A61F2002/30604; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30774; A61F2002/3079; A61F2002/30795; A61F2002/30797; A61F2002/3082; A61F2002/30827; A61F2002/30828; A61F2002/30878; A61F2002/30879; A61F2002/30886; A61F2002/30891; A61F2002/30892; A61F2002/3652; A61F2/3672; A61F2002/3674; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2220/0041; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2230/0028; A61F2230/005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
192 words
Multicomponent prosthesis for use in traumatology, orthopedics and veterinary medicine for joint prosthesis operations, consisting of at least a first component (11, 111) and a second component (112), which are connected at the adjoining ends by a first conical coupling (15, 115; 21, 121) which is tapered in one direction and is formed by a conical end (15, 115) at one end of the said first component (11, 111) which is inserted into a conical housing (21, 121) at the adjoining end of the said second component, characterized by a second conical coupling (23, 26; 123, 126), which is coaxial and is tapered in the opposite direction to that of the said first conical coupling, and which is formed by a conical seat (23, 123) made on the said second component (12, 112) of the prosthesis, by a female friction cone (13, 113), which is applied and is axially adjustable in the said second component, and by a locking counterscrew (14) which is screwed onto the said first component and interacts with the said female friction cone (13) in order to immobilize it in the conical seat of the said second component.
Claim 2
Dependent Claim
49 words
Multicomponent prosthesis in accordance with claim 1, in which the first component (11) and the second component (12) are the distal part and the proximal part, respectively, of a hip prosthesis or for another operation, with a spherical head being able to be fixed to the said second component.
Claim 3
Dependent Claim
180 words
Multicomponent prosthesis in accordance with claim 1, in which a shank (16) is provided at the smaller end of the conical end (15) of the first component (11), which [shank] has an external thread (17) and an axial hole (18) with an internal thread (19), in which, in the second component (12), the conical seat (23) for the female friction cone (13) is opposite the conical housing (21) for the said conical end (15) of the first component and ends from the opposite part of the said conical housing (21) with a cylindrical hole section (24), in which the female friction cone (13) is screwed onto the said external thread (17) of the said shank (16) in order to engage in the said conical seat (23) in opposition to the action of the said conical end (15) in the said conical housing (21), and in which the said counter-screw (14) is screwed into the threaded axial hole (18, 19) of the said shank (16) and bears a head (30, 31) which is supported on the said female friction cone (13).
Claim 4
Dependent Claim
32 words
Multicomponent prosthesis in accordance with claim 3, in which the external thread (17) and the internal thread (19) of the said shank (16) of the first component (11) have the same pitch.
Claim 5
Dependent Claim
32 words
Multicomponent prosthesis in accordance with claim 3, in which the external thread (17) and the internal thread (19) of the said shank (16) of the first component (11) have a different pitch.
Claim 6
Dependent Claim
28 words
Multicomponent prosthesis in accordance with one of the above claims, in which a spring washer (33) is arranged between the female friction cone (13) and the counterscrew (14).
Claim 7
Dependent Claim
31 words
Multicomponent prosthesis in accordance with claims 1 to 5, in which the said female friction cone (113) and the said counterscrew (114) are integrated in order to form a single piece.
Claim 8
Dependent Claim
94 words
Multicomponent prosthesis in accordance with any of the above claims, in which the second component (112) consists of two sections (112a, 112b) which are coupled in a complementary manner by means of at least partially toothed contact surfaces (130, 131), a first section (112a) having a conical housing (121) for accommodating the conical end (115) of the first component (11), while the second section (112b) bears a spherical head (120) and is fixed on the first section by means of screwing the female friction cone (13, 113)-counterscrew (14, 114) unit onto the first component.
Claim 9
Dependent Claim
69 words
Multicomponent prosthesis in accordance with claim 8, in which the first section (112a) has, axially to the conical housing (121), a cylindrical seat (121a), and in which the second section (112b) has an expandable base neck (112') intended to be inserted and to be locked in the said cylindrical seat (121a) as a result of screwing the female friction cone (13, 113)-counterscrew (14, 114) unit onto the first component.
Claim 10
Dependent Claim
44 words
Multicomponent prosthesis in accordance with one of the above claims, in which part of the conical end (15) of the first component is grooved or toothed on the periphery or is integrated with a cylindrical section that is grooved or toothed on the periphery.
Claim 11
Dependent Claim
31 words
Multicomponent prosthesis in accordance with the above claims, comprising, in addition, at least a means for radially or tagentially locking the said female friction cone and/or the said counterscrew against unscrewing.
References Cited (Backward Citations)
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