Vertebral implant and setting tool therefor
AssigneeUlrich GmbH & Co. KG
InventorCarsten Neumann
Life of this patent
Estimating the term…
Abstract
A spinal implant for engagement between a pair of vertebrae has a pair of parts displaceable relative to each other along an axis and each adapted to engage a respective one of the vertebrae. One of the parts is formed with a screwthread engaging a nut that bears axially on the other of the parts and that is formed with an externally accessible array of gear teeth. This implant is set by a setting tool having a holder fittable with the other part, a rotary member in the holder, and a gear on the rotary member meshable with the teeth of the one part when the holder is fitted to the other part.
Claims14
A spinal implant for engagement between a pair of vertebrae, the implant comprising:
- a first tubular element having an upper threaded part;
- a second tubular element forming an unthreaded part coaxial with and outside the threaded part, the parts being displaceable relative to each other along an axis and each adapted to engage a respective one of the vertebrae;
- and
- a nut threadedly engaging the screwthread of the threaded part, bearing axially on the unthreaded part, and formed with an externally accessible array of gear teeth, the unthreaded part having a rim against which the nut fits and being formed with a radially throughgoing notch opening at the rim.
In combination:
- a spinal implant for engagement between a pair of vertebrae, the implant comprising
- a first tubular element having an upper threaded part,
- an a second tubular element forming an unthreaded part, the parts being displaceable relative to each other along an axis and each adapted to engage a respective one of the vertebrae, and
- a nut threadedly engaging the screwthread of the threaded part, bearing axially on the unthreaded part, and formed with an externally accessible array of gear teeth;
- and
- a setting tool comprising
- a holder fittable with the unthreaded part,
- a shaft in the holder having a pair of ends,
- a gear on one of the ends of the shaft meshable with the teeth of the threaded part when the holder is fitted to the unthreaded part,
- a hand wheel on the other end of the shaft, and
- a core rod having an inner end screwable into the unthreaded part.
In combination:
- a spinal implant comprising:
- an outer unthreaded tubular sleeve part centered on an axis,
- an inner tubular core part having an upper external screwthread and coaxially received in the outer part,
- means including interengaging formations on the parts for permitting them to move axially relative to each other while preventing them from rotating about the axis relative to each other, and
- a nut threaded on the screwthread of the core part, bearing axially on the sleeve part, and formed with an array of externally accessible gear teeth;
- and
- a setting tool comprising:
- an elongated body having inner and outer ends,
- a holder on the inner end fittable with the sleeve part,
- a shaft extending through the body and having an inner end projecting at the holder from the body and carrying a gear meshing with the teeth of the nut, and
- a rod extending through the shaft and having an inner end screwable into the sleeve part.
Dependencies are inferred from the claim text.