Gear activated trocar assembly

Details Gear activated trocar assembly Gear activated trocar assembly

1994-04-06

1996-08-27

Thaler, Michael H.

Surgery

Instruments

606198, 604105, 604164, 604174, A61B 1700

Patent

active

055495958

ABSTRACT:
A trocar assembly is disclosed for use in inserting a laparoscopic instrument into the abdominal cavity during surgery and includes a cylindrical member activated by intermeshing gears to expand a cylindrical member having a normally retracted outer diameter when the trocar assembly is within the abdominal cavity, to resist withdrawing movement of the assembly from the abdominal cavity.

REFERENCES:
patent: 1155169 (1915-09-01), Starkweather
patent: 1665790 (1928-04-01), Novack
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patent: 4655219 (1987-04-01), Petruzzi
patent: 4994079 (1991-02-01), Genese et al.
patent: 4995868 (1991-02-01), Brazier
patent: 5002557 (1991-03-01), Hasson
patent: 5122122 (1992-06-01), Allgood
patent: 5147378 (1992-09-01), Markham
patent: 5197971 (1993-03-01), Bonutti

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