Hook with rotating saddle and rotatable mono axial pedicle screw
AssigneeBlackstone Medical, Inc.
InventorsMichael Hammer, Tara Ziolo
Life of this patent
Estimating the term…
Abstract
Disclosed herein are a hook with rotating saddle and a rotatable mono axial pedicle screw. In an embodiment, the disclosed hook may include at least one body comprising a hook member and a saddle member. The hook member and saddle member may be rotatably mounted to one another so as to rotate with respect to each other only about a common axis, and the saddle member may be configured for connection to an end of a connecting member. A surgical screw system may include receiver and screw members engagable with one another such that when engaged, only rotation of the receiving member about the longitudinal axis of the screw member and restrain against substantially all other translational or rotational movement.
Claims12
A surgical hook apparatus comprising:
- at least one body comprising a hook member and a saddle member, the hook member and the saddle member each provided with a cavity defined therein,
- a compression member having a first diameter, the compression member being operable to be received within the cavity of the hook member and the cavity of the saddle member,
- a set screw operable to be threaded within a connecting cavity defined in an upper portion of the cavity of the saddle member, and
- a plurality of balls disposed in a channel defined in and between the hook member and saddle member, wherein the channel is sized to retain the balls,
- wherein the hook member and saddle member are rotatably mounted to one another so as to rotate with respect to each other only about a common axis,
- wherein the saddle member is configured to receive and connect to a first connecting member,
- wherein the hook member is configured to receive and connect to a second connecting member,
- wherein when the set screw is provided in engagement within the saddle member and against the first connecting member, the first connecting member is operable to allow the compression member to be disposed at a second diameter in outwardly-biased engagement with at least one of the hook member and the saddle member, the second diameter being greater than the first diameter,
- wherein the outwardly-biased engagement compressively retains the plurality of balls in the channel so as to rotatably mount the hook member and saddle member to one another and to restrain against substantially all other translational or rotational movement between the hook member and the saddle member.
Dependencies are inferred from the claim text.