Expandable spinal jack for installation between upper and lower succeeding superior articular processes
AssigneeLinares Medical Devices, LLC
InventorMiguel A. Linares
Life of this patent
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Abstract
A spinal jack adapted for installation between first and second vertebral processes, including first and second inter-expandable jack halves arranged between retracted and expanded positions. Each of the jack halves further includes gripping portions adapted for engaging the vertebral processes. A geared mechanism provides for expanding or retracting the jack halves in order to establish a corrected adjusted orientation between the processes.
Claims12
A spinal jack adapted for installation between first and second vertebral processes, comprising:
- an upper spinal jack body and a lower spinal jack body, each of said bodies including gripping portions adapted for engaging the vertebral processes;
- a rotatable and geared driver incorporated into one of said bodies and engaging a pair of beveled slaved gears;
- and
- said slaved gears further including inner displaceable portions, opposing threads being established between said slaved gears and said inner displaceable portions which, upon rotation of said slaved gears, laterally displacing said inner portions to engage opposing and progressively stepped ratchet locations configured into stems extending between said bodies to define an adjusted separation distance between said bodies.
A spinal jack adapted for installation between first and second vertebral processes, comprising:
- an upper spinal jack body and a lower spinal jack body, each of said bodies including gripping portions adapted for engaging the vertebral processes;
- a rotatable and geared driver incorporated into one of said bodies and engaging a pair of beveled slaved gears, a pair of inner portions of said slaved gears being laterally outwardly displaced into engagement with stems extending between said bodies to define an adjusted separation distance;
- and
- a rubberized skirt configured as a wound roll seated within a circumferentially extending pocket extending within a base circumference of one of said jack bodies when said jack bodies are in a closed position, an opposite end of said skirt anchored to an opposing perimeter end face location in the other of said jack bodies such that, and upon expanding said jack bodies, said skirt unrolls to provide a barrier between an exterior environment and an expanding interior defined between said bodies.
Dependencies are inferred from the claim text.