Abstract: The surgical instrument system disclosed is particularly useful for endoscopic procedures. In the preferred embodiment, a hemostatic clip applicator can be directly connected to a trigger assembly or indirectly connected to the trigger assembly through the use of an extension. The connection between the extension and the clip applicator is secured to prevent accidental release during the procedure. The applicator receives a longitudinal input and translates the input into relative component motion through the use of gearing to apply the clips. The handle stem assembly in an alternative embodiment has a drive rod configuration that connects to a closure member so as not only to provide the distal biasing force, but also to provide, if needed, a proximal pulling force to assist in release of the jaw if it becomes necessary.

Abstract: The present invention provides a means for applying a substantially constant force to move clips in queue within an applicator, as well as means for more effectively dispensing the endmost clip from a column of abrasive clips within an applicator. The constant force means generally comprises a constant force spring which is movably secured at both ends within a chamber in the applicator such that the pressure exerted between the ends of the constant force spring forces the clips in queue toward the jaws of the applicator. The dispensing means generally comprises a spring that applies sufficient pressure against the endmost clip in a column of abrasive clips to dispense the endmost clip from the column while preventing the next endmost clip from being dispensed until after the endmost clip has been forced into the jaws of the applicator and applied.