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US 11,446,161 B2Granted
Translating dual axis adjustable interbody fusion spinal system
AssigneeAdcura, Inc.
InventorsAndrew Rogers, Robyn Burrows-Ownbey, Eric Blossey
Life of this patent
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Abstract
An interbody fusion device employs a torque transfer mechanism to transfer torque to a driving mechanism responsible for expansion of the interbody fusion device in a direction non-parallel to a longitudinal axis of the driving mechanism.
Claims24
An interbody fusion device, comprising:
- a housing comprising a first shell member and a second shell member, at least the first shell member comprises a plurality of riser members;
- a driving mechanism operable to expand and/or contract the housing, the driving mechanism comprising an axle having a longitudinal axis and a screw member having a through-opening adapted to allow the axle to pass;
- a gear assembly operable to transfer torque to the driving mechanism, the gear assembly comprising a first translating gear coupled to the axle and a first driving gear configured to receive torque applied from a direction non-parallel to the longitudinal axis of the axle and drive the first translating gear, whereby application of torque to the first driving gear causes the first translating gear and the axle to rotate about the longitudinal axis, causing the screw member to rotate with and travel along the axle, wherein the screw member is engageable with the plurality of riser members, whereby rotation of the screw member causes the first shell member and the second shell member to move relative to each other to effect expansion and/or contraction of the housing.
An interbody fusion device, comprising:
- a housing comprising a first shell member and a second shell member;
- a first driving mechanism arranged in the housing at a first lateral area, a second driving mechanism arranged in the housing at a second lateral area, the first driving mechanism comprising a first axle having a longitudinal axis, and the second driving mechanism comprising a second axle having a longitudinal axis;
- a first gear assembly operable to transmit torque to the first driving mechanism, the first gear assembly comprising a translating gear coupled to the first axle and a driving gear configured to receive torque applied from a direction non-parallel to the longitudinal axis of the first axle and drive the translating gear, whereby application of torque to the driving gear causes the translating gear and the first axle to rotate about the longitudinal axis of the first axle, thereby actuating the first driving mechanism to effect expansion and/or contraction of the housing at the first lateral area;
- and
- a second gear assembly operable to transmit torque to the second driving mechanism, the second gear assembly comprising at least a first translating gear coupled to the second axle and a first driving gear configured to receive torque applied from a direction non-parallel to the longitudinal axis of the second axle and drive the first translating gear, whereby application of torque to the first driving gear causes the first translating gear and the second axle to rotate about the longitudinal axis of the second axle, thereby actuating the second driving mechanism to effect expansion and/or contraction of the housing at the second lateral area, wherein
- the first gear assembly is operable independently of the second gear assembly, whereby a degree of expansion and/or contraction of the housing at the first lateral area is independently adjustable, and/or
- the second gear assembly is operable independently of the first gear assembly, whereby a degree of expansion and/or contraction of the housing at the second lateral area is independently adjustable.
4 more elements
An interbody fusion device, comprising:
- a housing comprising a first shell member and a second shell member;
- a first driving mechanism arranged in the housing at a first lateral area, a second driving mechanism arranged in the housing at a second lateral area, the first driving mechanism comprising a first axle having a longitudinal axis, and the second driving mechanism comprising a second axle having a longitudinal axis;
- a first gear assembly operable to transmit torque to the first driving mechanism, the first gear assembly comprising a translating gear coupled to the first axle and a driving gear configured to receive torque applied from a direction non-parallel to the longitudinal axis of the first axle and drive the translating gear, whereby application of torque to the driving gear causes the translating gear and the first axle to rotate about the longitudinal axis of the first axle, thereby actuating the first driving mechanism to effect expansion and/or contraction of the housing at the first lateral area;
- and
- a second gear assembly operable to transmit torque to the second driving mechanism, the second gear assembly comprising at least a first translating gear coupled to the second axle and a first driving gear configured to receive torque applied from a direction non-parallel to the longitudinal axis of the second axle and drive the first translating gear, whereby application of torque to the first driving gear causes the first translating gear and the second axle to rotate about the longitudinal axis of the second axle, thereby actuating the second driving mechanism to effect expansion and/or contraction of the housing at the second lateral area, further comprising
- a first thrust bearing coupling the first axle and the second axle at a first end of the first axle and a first end of the second axle;
- a second thrust bearing coupling the first axle and the second axle at a second end of the first axle and a second end of the second axle, wherein
- the first thrust bearing and the second thrust bearing are configured to allow the first axle and the second axle to rotate about the longitudinal axis of the first axle and the second axle respectively, and prohibit translational movement of the first axle and the second axle respectively.
5 more elements
Dependencies are inferred from the claim text.