Surgical instruments and methods of assembly
AssigneeCovidien LP
InventorsJoseph T. Eisinger, Patrick Mozdzierz
Life of this patent
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Abstract
A trocar assembly for use with a circular stapler includes a shaft, a trocar tip, and a band. The trocar tip is configured to mechanically engage a distal portion of the shaft. The trocar tip includes a first portion and a second portion. The first portion of the trocar tip is movable relative to the second portion of the trocar tip prior to assembly of the trocar tip. The band encircles part of the first portion of the trocar tip and part of the second portion of the trocar tip.
Claims20
A trocar assembly for use with a circular stapler, the trocar assembly comprising:
- a shaft;
- a trocar tip configured to mechanically engage a distal portion of the shaft, the trocar tip including a first portion and second portion, the first portion is movable relative to the second portion prior to assembly of the trocar tip;
- and
- a band encircling a part of the first portion of the trocar tip and a part of the second portion of the trocar tip.
A circular stapler comprising:
- a handle assembly;
- an elongated body extending from the handle assembly;
- and
- a shell assembly disposed adjacent a distal end of the elongated body and including a cartridge assembly and an anvil assembly, the cartridge assembly including a trocar assembly, and the anvil assembly including a retention rod configured to selectively engage a portion of the trocar assembly, the trocar assembly including:
- a shaft;
- a trocar tip configured to mechanically engage a distal portion of the shaft, the trocar tip having a first portion and second portion, the first portion is movable relative to the second portion between a first position where the first portion and the second portion are free from contact with each other and a second position where the first portion and the second portion are in contact with each other;
- and
- a band encircling a part of the first portion of the trocar tip and a part of the second portion of the trocar tip when the first portion and the second portion are in the second position, wherein the band is occluded from view when the retention rod of the anvil assembly properly engages the portion of the trocar assembly.
A method of assembling a trocar assembly of a surgical instrument, the method including:
- sliding a band around a part of a first portion of a trocar tip such that the band encircles the part of the first portion;
- inserting a part of a second portion of the trocar tip between the band and the part of the first portion of the trocar tip;
- and
- securing the first portion of the trocar tip to the second portion of the trocar tip.
Dependencies are inferred from the claim text.