Pivot screw for bipolar surgical instruments

Details Pivot screw for bipolar surgical instruments Pivot screw for bipolar surgical instruments

1998-06-29

2000-04-25

Dvorak, Linda C. M.

Surgery

Instruments

Electrical application

606 51, 606 52, 606174, 606208, A61B 1736

Patent

active

060539143

ABSTRACT:
A bipolar electrosurgical instrument having an improved pivot screw design is disclosed. The bipolar electrosurgical instrument has a first half which has a first pivot surface and a first bore. The first bore has a first stepped portion and an elongated portion proximate to the first pivot surface. A second half has a second pivot surface and a second bore having a second stepped portion. An insulating material is disposed on the first pivot surface and the elongated portion of the first bore. A first insert having a third bore in which the third bore has first threads is disposed in the second bore and prevented from entering the first bore by the second stepped portion. A second insert having a fourth bore is disposed in the second bore between the second stepped portion and the first insert and prevented from entering the first bore by the second stepped portion. Lastly, a pivot screw having a head and a second thread is disposed in the first, second, and third bores such that the head is prevented from entering the second bore by the first stepped portion and where the second thread passes through the first, second, and fourth bores, into the third bore engaging with the first thread whereby the first half is fastened to the second half for sliding contact between the first and second pivot surfaces.

REFERENCES:
patent: 5649958 (1997-07-01), Grimm et al.
patent: 5697949 (1997-12-01), Giurtino et al.
patent: 5921984 (1999-07-01), Sutcu et al.

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