Claims
- 1. An improvement in ligature tying instrument comprising a hemostat-like plier in which grasping jaw members are flexibly pivoted together intermediate their ends; means for releasably securing said jaws in grasping position on a ligature wire;
- wherein the improvement comprises a balanced and substantially symmetrical instrument having one handle member extended as a polygonal rod rigidly fixed in the long axis of the instrument for purposes of spinning the instrument about a longitudinal centerline, when said instrument is locked in the grasping position;
- wherein the grasping face of the jaw members is concave except right at the tip, such that closure of the jaws tends to force the grasped wires toward the long axis of the instrument for purposes of centering the wires and maintaining their central position during the twisting, tucking and breaking process.
- 2. An instrument as in claim 1; wherein, the grasping faces of the jaw members are serrated such that the peaks of the individual serrations would lie in a concave surface.
- 3. An instrument as in claim 1; wherein, the face of the grasping portion of the jaw member has serrations which are serrated, forming a compounding of serrations.
- 4. An instrument as in claim 1; wherein, the general contour of the face of the grasping portion of the jaw member is cylindrical in part and conical in part, whereby increased pressure is applied at the tip of the jaw member allowing twisted wires to be broken at the tip in a controlled manner.
- 5. An instrument as in claim 1; wherein, the general contour of the face of the grasping portion of the jaw member is cylindrical in part and spherical in part, whereby increased pressure is applied at the tip of the jaw member allowing twisted wires to be broken at the tip in a controlled manner.
Parent Case Info
This is a continuation in part of my copending application Ser. No. 12,004, filed Feb. 14, 1979, now abandoned; and this contains material from the original application and new material not previously claimed. Reference is also made to my disclosure document #068679.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
Country |
479719 |
Feb 1938 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Trylon Surgical Instruments Catalog, p. B58 (1971) found in A.U. 335. |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
12004 |
Feb 1979 |
|