Device for Securing to a Support, Assembling Piece for this Device, and Method for Securing a Device to a Support
The invention relates to a device ( 1 ) comprising an assembling piece ( 3 ) provided with a hole ( 4 ), and a fixing element ( 5 ) having a shank ( 6 ) as well as head ( 7 ). The device ( 1 ) has a locking screw ( 8 a ) of the head ( 7 ), characterized in that the hole ( 4 ) is shaped for producing a stop ( 9 ) for the head and for enabling the head ( 7 ), when it rests against the stop ( 9 ), to be displaced inside the hole ( 4 ) in the plane of the cross-section of the hole ( 4 ), the hole ( 4 ) having an inside thread in which the locking screw ( 8 A) is to be screwed so that the locking screw ( 8 A) rests against the head ( 7 ) and thus presses the latter against the stop ( 9 ). The invention also relates to fixing devices, in particular, surgical implants.
1 . A device ( 1 ) for securing to a support ( 2 ), said device ( 1 ) comprising firstly an assembly part ( 3 ) provided with at least one hole ( 4 ) defining a hole section, and secondly a fastener member ( 5 ) for fastening the assembly part ( 3 ) to the support ( 2 ), said fastener member ( 5 ) comprising a shank ( 6 ) designed to be anchored in the support ( 2 ) and a head ( 7 ) surmounting said shank ( 6 ) and designed to be received within the hole ( 4 ), said device ( 1 ) including at least one lock screw ( 8 A, 8 B) for locking the head ( 7 ) to secure the head ( 7 ) to the assembly part ( 3 ), the device being characterized in that the hole ( 4 ) is shaped to constitute an abutment ( 9 ) for the head ( 7 ), said hole ( 4 ) also being shaped and dimensioned so that the head ( 7 ), when bearing against the abutment ( 9 ), can be moved within the hole ( 4 ) in translation substantially in the plane of the section of the hole ( 4 ), the hole ( 4 ) including at least one internal thread ( 4 A, 4 B, 4 C) into which the lock screw ( 8 A, 8 B) is designed to be screwed so that said lock screw ( 8 A, 8 B) bears against the head ( 7 ) and thus presses it against the abutment ( 9 ).
2 . A device ( 1 ) according to claim 1 , characterized in that the hole ( 4 ) includes at least a portion of oblong shape.
3 . A device ( 1 ) according to claim 1 , characterized in that the hole ( 4 ) is of oblong shape.
4 . A device ( 1 ) according to claim 2 , characterized in that the hole ( 4 ) is of oblong shape.
5 . A device ( 1 ) according to claim 1 , characterized in that said shank ( 6 ) is threaded.
6 . A device ( 1 ) according to claim 2 , characterized in that said shank ( 6 ) is threaded.
7 . A device ( 1 ) according to claim 3 , characterized in that said shank ( 6 ) is threaded.
8 . A device ( 1 ) according to claim 1 , characterized in that the abutment ( 9 ) forms a bearing surface for the head ( 7 ), said bearing surface extending substantially in a bearing plane ( 14 ).
9 . A device ( 1 ) according to claim 8 , characterized in that the assembly part ( 3 ) includes an internal face ( 3 C) for placing the support ( 2 ), the bearing plane ( 14 ) being substantially inclined relative to said internal face ( 3 C).
10 . A device ( 1 ) according to claim 1 , characterized in that the hole ( 4 ) includes firstly a bottom stage ( 10 ) for placing the support ( 2 ) and including a bottom orifice ( 10 A) presenting a section constriction ( 10 B) to form said abutment ( 9 ), and secondly a top stage ( 11 ) having at least one internally threaded top orifice ( 11 A) for enabling the lock screw ( 8 A, 8 B) to be screwed therein.
11 . A device ( 1 ) according to claim 10 , characterized in that the bottom orifice ( 10 A) is oblong in shape extending in a longitudinal direction (Y-Y′), the head ( 7 ) coming to bear against the section constriction ( 10 B) and being capable of sliding within the bottom orifice ( 10 A) along the direction (Y-Y′).
12 . A device ( 1 ) according to claim 10 , characterized in that the top stage ( 10 ) comprises a plurality of internally threaded top orifices ( 110 A, 111 A, 112 A) positioned side by side to form a single resulting top orifice ( 11 A) while enabling the lock screw ( 8 A, 8 B) to be screwed into each of said internally threaded top orifices ( 110 A, 111 A, 112 A).
13 . A device ( 1 ) according to claim 11 , characterized in that the top stage ( 10 ) comprises a plurality of internally threaded top orifices ( 110 A, 111 A, 112 A) positioned side by side to form a single resulting top orifice ( 11 A) while enabling the lock screw ( 8 A, 8 B) to be screwed into each of said internally threaded top orifices ( 110 A, 111 A, 112 A).
14 . A device ( 1 ) according to any one of claim 1 , characterized in that the support ( 2 ) is a bony support, and the assembly part ( 3 ) is a surgical instrument or implant.
15 . A device ( 1 ) according to claim 14 , characterized in that the assembly part ( 3 ) is an osteosynthesis plate, and in particular an epiphyseal plate or a shaft plate.
16 . An assembly part ( 3 ) for a device ( 1 ) in accordance with claim 1 .
17 . A method of securing a device ( 1 ) to a support ( 2 ), said device ( 1 ) comprising firstly an assembly part ( 3 ) provided with at least one hole ( 4 ) defining a hole section ( 4 ), and secondly a fastener member ( 5 ) for fastening the assembly part ( 3 ) to the support ( 2 ), said fastener member ( 5 ) comprising a shank ( 6 ) together with a head ( 7 ) surmounting said shank ( 6 ) and designed to be received within the hole ( 4 ), said method comprising a step of positioning the head ( 7 ) in the hole ( 4 ), an anchoring step during which the shank ( 6 ) is anchored in the support ( 2 ), and a step of securing the head ( 7 ) with the assembly part ( 3 ) with the help of at least one lock screw ( 8 A, 8 B), the method being characterized in that the hole ( 4 ) is shaped to form an abutment ( 9 ) for the head ( 7 ), said hole ( 4 ) also being shaped and dimensioned so that the head ( 7 ), when bearing against the abutment ( 9 ), can be moved within the hole ( 4 ) in translation substantially in the plane of the section of the hole ( 4 ), the hole ( 4 ) including at least one internal thread ( 4 A, 4 B, 4 C) in which the lock screw ( 8 A, 8 B) is designed to be screwed, said step of securing the head ( 7 ) with the assembly part ( 3 ) comprising screwing the lock screw ( 8 A, 8 B) into said internal thread ( 4 A, 4 B, 4 C) so that said lock screw ( 8 A, 8 B) bears against the head ( 7 ) and thus presses it against the abutment ( 9 ).
18 . A method according to claim 17 , characterized in that it includes a step of moving the head ( 7 ) relative to the hole ( 4 ), within which the head ( 7 ) is moved relative to the hole ( 4 ) in translation substantially in the plane of the section of the hole ( 4 ).
19 . A method according to claim 18 , characterized in that the movement step is performed after the anchoring step, by moving the assembly part ( 3 ) relative to the support ( 2 ).