Surgical wire and pin extractor
OwnerRobert H. Muncieinventor
Life of this patent
Estimating the term…
Abstract
The medical instrument disclosed includes a pair of jaws which are clamped to an end of a surgical wire or pin. The jaws are pressed together, not by the usual Jacobs' chuck arrangement, but by the operation of a cam lever. The lever is mounted in the hand-grip of the instrument. This arrangement makes it possible for the wire or pin to be gripped with a large force, yet to be gripped delicately and precisely so that damage to the surrounding tissue is kept to a minimum. The instrument is T-shaped as to its general shape, and the cam lever operates the jaws by means of a collet action by which a jaw member is axially moved within the hollow stem of the T. The inside end of the stem and a portion of the outer end of the jaw member forming a pair of opposed camming surfaces.
Claims14
A hand operated medical instrument for the purpose of gripping surgical wires, comprising:
- gripping means, having a pair of closable jaws with generally opposed gripping surfaces, with said jaws being adapted to grip surgical wire, and sleeve means for producing a camming action between said sleeve means and said jaws when relative axial movement takes place therebetween, thereby causing a change in the relative opening of said jaws;
- a hand-grip grippable in use by one hand of the user;
- lever means associated with said hand-grip, having a portion of said lever means spaced from said hand grip for displacement by said one hand of the user when in use;
- and
- connecting means between said gripping means and said lever means wherein the relative displacement of said connecting means, caused by a corresponding displacement of said lever means relative to said hand grip, moves said jaws and said sleeve means axially with respect to one another;
- wherein said sleeve means is a collet threadably engaged on a stern member and disposed at the end thereof opposite to said hand-grip;
- wherein said jaws include a male camming surface, and said collet includes a female camming surface, with said male and female camming surfaces being complementary;
- and
- wherein said lever provides a mechanical advantage whereby the force transmitted to the connecting means in is greater than the force used to displace said lever means, and wherein said displacement of said lever means relative to said hand grip is greater than said relative displacement of said connecting means.
A hand operated medical instrument for the purpose of gripping surgical wires, comprising:
- gripping means, having a plurality of closable jaws with generally opposed gripping surfaces, with said jaws being adapted to grip surgical wire, and sleeve means for producing a camming action between said sleeve means and said jaws when relative axial movement takes place therebetween, thereby causing a change in the relative opening of said jaws;
- a hand-grip grippable in use by one hand of the user;
- lever means associated with said hand-grip, having a portion of said lever means spaced from said hand grip for displacement by said one hand of the user when in use;
- and
- connecting means between said gripping means and said lever means wherein the relative displacement of said connecting means, caused by a corresponding displacement of said lever means relative to said hand grip, moves said jaws and said sleeve means axially with respect to one another;
- wherein said sleeve means is a collet threadably engaged on a stem member and disposed at the end thereof opposite to said hand-grip;
- wherein said lever provides a mechanical advantage whereby the force transmitted to the connecting means in is greater than the force used to displace said lever means, and wherein said displacement of said lever means relative to said hand grip is greater than said relative displacement of said connecting means.
Dependencies are inferred from the claim text.