Abstract: An obturator for a trocar having a shaft, pin, and removable knife. The pin mounts to the shaft and secures the knife thereto.

Abstract: A safety shielded, reusable trocar consisting of a trocar cannula subassembly, a safety shield control mechanism, and a separate obturator subassembly. The trocar cannula subassembly includes an outer cannula attached to a main housing having a central bore in which a spring biased, inner cannula is slidably and removably inserted, and an upper housing, removably secured to the main housing, having a central bore which is aligned longitudinally with the bore of the main housing and in which sealing means is removably secured. The obturator subassembly includes an elongated obturator having a replaceable and rotatable knife, an elongated shaft, an arcuate shaped cap, and which extends through the upper housing, sealing means, main housing, inner cannula, and outer cannula.