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US 8,425,521 B2Granted
Tensioning device for surgical elements
AssigneeStryker Trauma GmbH
InventorsAxel Bernhard Cremer, This Aebi
Life of this patent
Estimating the term…
Abstract
A tensioning device for surgical elements is described. The tensioning device comprises a fixation device, a clamping device, a spring device, and a force deflecting device that interacts with the clamping device. The force deflecting device is designed to convert the spring force exerted by the spring device on the clamping device into a clamping force exerted by the clamping device on the surgical element.
Claims21
A tensioning device for surgical elements comprising:
- a fixation device, designed for the torque-proof fixation of a surgical element mounted in a surgical element receiving opening therein which extends along a longitudinal axis;
- a clamping device, designed for the exertion of an essentially radial inward clamping force on the surgical element;
- a spring device, which works to exert spring force on the clamping device, whereby the spring force is essentially exerted in an axial direction;
- and
- a force deflecting device that interacts with the clamping device, which is designed to convert at least a part of the spring force exerted on the clamping device into at least part of the clamping force exerted on the surgical element, the force deflecting device having inner surfaces angled towards the surgical element receiving opening, wherein one of said angled inner surfaces is angled towards the longitudinal axis and another of said angled inner surface is angled away from the longitudinal axis, the angled inner surfaces of the force deflecting device engageable with the clamping device.
2 more elements
A tensioning device for inserting surgical elements into bone comprising:
- an axially extending body portion having a drive shaft section at a first body portion end, a hollow shaft section adjacent a body portion second end and first and second axially spaced circumferential stop surfaces intermediate the first and second ends, the first stop surface closer to the first body portion end and the second stop surface closer to the second body portion end, the stop surfaces extending transversely to a longitudinal axis of the body portion;
- a clamping element having a plurality of deflectable gripping elements at a gripping end thereof and a mounting portion slidably engaging an outer surface of the hollow shaft section of the body portion;
- a biasing element mounted on an outer surface of the hollow shaft section at a location thereon closer to the body portion first end than the clamping element, a first end of the biasing element engaging the second circumferential stop surface and the clamping element mounting portion at a second biasing element end;
- a deflector surrounding the clamping element and the biasing element fixedly mounted on an outer surface of the hollow shaft portion and having a first end engaging the first stop surface and a second end defining a surgical element receiving opening and having inner surfaces angled towards the surgical element receiving opening, wherein one of said angled inner surfaces is angled towards the longitudinal axis and another of said angled inner surface is angled away from the longitudinal axis, the angled inner surfaces of the deflector engageable with outer surfaces of the deflectable gripping elements of the clamping element.
1 more element
Dependencies are inferred from the claim text.