Connection device

A connection device for the adjustable connection of a first support rod with either a bone screw or a second support rod in a surgical fixation system, said connection device comprising:

• (a) an external component having a cylindrical hole;
• (b) a cylindrical internal component, said internal component being adapted to be slidingly positioned on said cylindrical hole;
• (c) the internal and external components having roughened surfaces in contact with one another, when said inner component is positioned in said hole, said surfaces enhancing frictional contact between said components;
• (d) said internal component having a first slot and at least one through opening, said through opening being transverse to the axis of said internal component, for receiving said support rod or bone screw;
• and
• (e) loading means for loading said connection device by causing relative sliding motion of said components;
• whereby said support rod or bone screw can be locked in place, when inserted in said through opening, by means of the loading means causing the components to slide axially in relation to each other and the flexible deformation of said internal component through its first slot occurring when said internal component is slid against the inserted support rod or bone screw by said loading means and thereby pressed against the external component.

A connection device for the adjustable connection of a first support rod with either a bone screw or a second support rod in a surgical fixation system, said connection device comprising:

• (a) an external component having a cylindrical hole and an internal cone;
• (b) an internal component adapted to be slidingly positioned in said cylindrical hole;
• (c) said internal component having a threaded segment, a first slot and at least one through opening, said through opening being transverse to the axis of the internal component, for receiving a support rod or bone screw;
• and
• (d) loading means for loading said connection device by causing relative sliding motion of said components, said loading means comprising a nut for engaging said threaded segment of said internal component, thereby to urge said internal component into contact with the external component;
• said nut having a lug for engagement with the internal cone of said external component;
• whereby said support rod or bone screw can be locked in place, when inserted in said through opening, by means of the loading means causing the components to slide axially in relation to each other and the flexible deformation of said internal component through its first slot occurring when said internal component is slid against the inserted support rod or bone screw by said loading means and thereby pressed against the external component.

A connection device for the adjustable connection of a first support rod with either a bone screw or a second support rod in a surgical fixation system, said connection device comprising:

• (a) an external component having a cylindrical hole;
• (b) a cylindrical internal component adapted to be slidingly positioned in said cylindrical hole, said internal component having a first slot, a first through opening transverse to the axis of said central component for receiving a first support rod, a second through opening for receiving a bone screw or second support rod;
• (c) loading means comprising a threaded axial hole and a set screw adapted to be seated in said threaded axial hole, to bear upon a first support rod in said first through opening and to urge said first support rod against said external component thereby to urge said external component against the bone screw or second support rod in said second through opening
• whereby said support rods or bone screw can be locked in place, when inserted in said through openings, by means of the loading means causing the components to slide axially in relation to each other and the flexible deformation of said internal component through its first slot occurring when said internal component is slid against the inserted support rod or bone screw by said loading means and thereby pressed against the external component.

A connection device for the adjustable connection of a first support rod with either a bone screw or a second support rod in a surgical fixation system, said connection device comprising:

• (a) an external component having a cylindrical hole;
• (b) a cylindrical internal component adapted to be axially slidingly positioned in said cylindrical hole, said internal component having a first slot and a first through opening transverse to the axis of said internal component for receiving a bone screw or second support rod and a second through opening for receiving a first support rod;
• and
• (c) loading means comprising a threaded axial hole in said internal component and a set screw adapted to be seated in said threaded axial hole, to bear upon the bone screw or second support rod in said first through opening, and to urge said bone screw or second support rod against said external component, thereby to urge said external component against the first support rod in said second through opening;
• whereby said support rods or bone screw can be locked in place, when inserted in said through openings, by means of the loading means causing the components to slide axially in relation to each other and the flexible deformation of said internal component through its first slot occurring when said internal component is slid against the inserted support rod or bone screw by said loading means and thereby pressed against the external component.

A connection device for the adjustable connection of a first support rod with either a bone screw or a second support rod in a surgical fixation system, said connection device comprising:

• (a) an external component having a cylindrical hole;
• (b) a cylindrical internal component adapted to be slidingly positioned in said cylindrical hole, said internal component having a threaded segment, a cylindrical segment with a transverse through slot for receiving a support rod and a swivel hook or pedicle screw, and
• (c) loading means comprising a nut engaging the threaded segment of said internal component to bear upon said external component urging said external component against a support rod inserted into said recess
• whereby said support rod or bone screw can be locked in place, when inserted in said through slot, by mans of the loading means causing the components to slide axially in relation to each other and the flexible deformation of said internal component through its slot occurring when said internal component is slid against the inserted support rod or bone screw by said loading means and thereby pressed against the external component.

A connection device for the adjustable connection of a first support rod with either a bone screw or a second support rod in a surgical fixation system, said connection device comprising:

• (a) an external component having a cylindrical hole;
• (b) a cylindrical internal component adapted to be axially slidingly positioned in said external component, said internal component having an end, a slot at said end and a double hole through opening comprising first and second holes offset in relation to one another, said first hole, positioned toward said end of said internal equipment, having a smaller diameter than the second hole, or any support rod or bone screw to be inserted;
• and
• (c) loading means for loading said connection device by causing relative sliding motion of said components whereby said support rod or bone screw can be locked in place, when inserted in said through opening, by means of the loading means causing the components to slide axially in relation to each other and the flexible deformation of said internal component through its slot occurring when said internal component is slid against the inserted support rod or bone screw by said loading means and thereby pressed against the external component.