Device destined to be coupled to at least one support, and in particular a surgical implant destined to be coupled to a bone
Disclosed herein is a device destined to be coupled to at least one support, and in particular a surgical implant destined to be coupled to a bone. The invention relates generally to a device ( 1 ) including a fixing element ( 3 ) including a head ( 3 A) and a pin ( 3 B) destined to be anchored in a support. The device further includes an assembly part ( 4 ) including a through hole ( 5 ), and a ring ( 6 ) housed in a manner that can be oriented within the through hole ( 5 ). The ring ( 6 ) has a passage ( 6 A) shaped so as to allow passage of the pin ( 3 B) and to stop the head ( 3 A). The ring ( 6 ) is expandable according to its axial direction between a configuration wherein the ring ( 6 ) can be oriented and a configuration wherein the ring ( 6 ) is blocked.
1. A device ( 1 ) destined to be coupled to at least one support ( 2 ), said device ( 1 ) comprising:
a fixing element including a head and a pin destined to be inserted in an axial direction in the support;
an assembly part including at least one through hole; and
a ring having a longitudinal axis corresponding to said axial direction and housed in a manner that can be oriented within said through hole, said ring being equipped with a passage extending substantially in said axial direction and being shaped on the one hand to allow passage of pin therethrough and on the other hand to realize a means of stoppage for head;
wherein the ring is expandable according to substantially said axial direction between an initial configuration wherein ring can be oriented relative to hole and an expanded configuration wherein ring is blocked relative to hole.
2. The device ( 1 ) according to claim 1 wherein the through hole ( 5 ) and ring ( 6 ) are shaped to realize a spherical kinematic joint between assembly part ( 4 ) and ring ( 6 ) when ring ( 6 ) is in the initial configuration.
3. The device ( 1 ) according to claim 1 wherein the through hole ( 5 ) and ring ( 6 ) are shaped to realize a spherical kinematic joint catch between ring ( 6 ) and assembly part ( 4 ) when ring ( 6 ) is in the initial configuration, said spherical joint catch substantially prohibiting the rotation of ring ( 6 ) around its axial direction (X-X′).
4. The device ( 1 ) according to claim 3 wherein the ring ( 6 ) includes at least one radial fin ( 6 C, 6 D) destined to cooperate with a corresponding groove ( 7 C, 7 D) of complementary shape arranged longitudinally on the lateral wall ( 5 A) of through hole ( 5 ), such as to substantially prohibit the rotation of ring ( 6 ) around its axial direction (X-X′).
5. The device ( 1 ) according to claim 1 wherein the passage ( 6 A) includes a countersink with internal threading ( 8 ) defining a bore with internal threading ( 8 A) and a root ( 8 B), which root ( 8 B) forms a support surface and a means of stoppage for said head ( 3 A), said device including a check screw ( 9 ) destined to be tightened into countersink ( 8 ) against said head ( 3 A), this tightening causing axial expansion of ring ( 6 ).
6. The device ( 1 ) according to claim 5 wherein the ring ( 6 ) includes a first item and a second item ( 10 , 11 ) superimposed, and wherein the substantially axial expansion of ring ( 6 ) towards its expanded configuration corresponds to a relative separation of said first and second items ( 10 , 11 ) according substantially to the axial direction (X-X′).
7. The device according to claim 6 wherein said first and second items ( 10 , 11 ) are distinct and connected together by at least one bracket ( 12 ) that has a flexible nature.
8. The device ( 1 ) according to claim 6 wherein said first and second items ( 10 , 11 ) are independent one from the other.
9. The device ( 1 ) according to claim 6 wherein the countersink with internal threading ( 8 ) is distributed over the first and second items ( 10 , 11 ) such that the bore with internal threading ( 8 A) belongs to the first item ( 10 ) while root ( 8 B) belongs to the second item ( 11 ).
10. The device ( 1 ) according to claim 6 wherein said first item ( 10 ) and through hole ( 5 ) are shaped to realize a spherical kinematic joint catch between the first item ( 10 ) and the assembly part ( 4 ) when ring ( 6 ) is in the initial configuration, said spherical joint prohibiting substantially the rotation of the first item ( 10 ) around its axial direction (X-X′).
11. The device ( 1 ) according to claim 10 wherein the first item ( 10 ) includes at least one radial fin ( 6 C, 6 D) destined to cooperate with a corresponding groove ( 7 C, 7 D) of complementary shape arranged longitudinally on the lateral wall ( 5 A) of through hole ( 5 ), such as to substantially prohibit the rotation of the first item ( 10 ) around its axial direction (X-X′).
12. The device ( 1 ) according to claim 5 wherein the fixing element ( 3 ) is a screw.
13. The device ( 1 ) according to claim 12 wherein the countersink ( 8 ) is threaded internally according to a direction that is inverse to that of the external threading ( 3 C) of the screw ( 3 ).
14. The device ( 1 ) according to claim 1 wherein the through hole ( 5 ) is arranged between an upper side ( 4 A) and an opposite lower side ( 4 B) of the assembly part ( 4 ), transversal section ( 13 ) of said hole ( 5 ) at the level of the upper side ( 4 A) and/or lower side ( 4 B) being shaped to allow the introduction in through hole ( 5 ) of ring ( 6 ) in initial configuration only when said ring ( 6 ) is introduced via its edge ( 6 B).
15. The device ( 1 ) according to claim 14 wherein the transversal section ( 13 ) of said hole ( 5 ) at the level of the upper side ( 4 A) and/or lower side ( 4 B) has a substantially circular general shape, with two additional undercuts ( 14 , 15 ) diametrically opposed.
16. The device ( 1 ) according to claim 1 wherein the support ( 2 ) is of a bone nature, while assembly part ( 4 ) is an implant or surgical ancillary.
17. The device ( 1 ) according to claim 16 wherein the assembly part ( 4 ) is an osteosynthesis plate.