Endoscopic reposable surgical clip applier

An endoscopic assembly configured for selective connection to a handle assembly and actuatable by a trigger of the handle assembly, the endoscopic assembly comprising:

• an outer tube defining a lumen therethrough, the outer tube including a proximal end and a distal end;
• a pair of jaws fixedly supported and extending from the distal end of the outer tube, the pair of jaws being movable between an open position and a closed position, wherein the pair of jaws are configured to form a surgical clip loaded therewithin when the pair of jaws are actuated from the open position to the closed position;
• and
• a drive assembly slidably supported in the lumen of the outer tube, the drive assembly including:
• a shaft pusher tube slidably supported in the lumen of the outer tube, the shaft pusher tube including a proximal end, a distal end and defining a lumen therethrough, wherein a radial flange is provided at the proximal end of the shaft pusher tube;
• and
• a closure drive rod slidably disposed within the lumen of the shaft pusher tube, the closure drive rod having a proximal end projecting from the proximal end of the outer tube and engagable by the trigger of the handle assembly, and a distal end configured to selectively engage the pair of jaws to move the pair of jaws to the closed position, wherein a shoulder is provided at the proximal end of the closure drive rod;
• and
• a biasing member interposed between the shoulder of the closure drive rod and the radial flange of the shaft pusher tube.

A reposable surgical clip applier, comprising:

• a handle assembly including:
• a housing;
• and
• a trigger pivotally connected to the housing, the trigger including an actuating end disposed within the housing;
• an endoscopic assembly selectively connectable to the housing of the handle assembly, the endoscopic assembly including:
• an outer tube defining a lumen therethrough and a window in a distal end thereof;
• a pair of jaws fixedly supported and extending from a distal end of the outer tube;
• and
• a drive assembly slidably supported in the lumen of the outer tube, the drive assembly including:
• a shaft pusher tube slidably supported in the lumen of the outer tube, the shaft pusher tube including a proximal end, a distal end and defining a lumen therethrough, wherein a radial flange is provided at the proximal end of the shaft pusher tube;
• a closure drive rod slidably disposed within the lumen of the shaft pusher tube, the closure drive rod having a proximal end projecting from the proximal end of the outer tube and engagable by the actuating end of the trigger, and a distal end selectively engagable with the pair of jaws to approximate the pair of jaws, wherein a shoulder is provided at the proximal end of the closure drive rod;
• and
• a biasing member interposed between the shoulder of the closure drive rod and the radial flange of the shaft pusher tube;
• and
• a clip cartridge assembly selectively disposable within the window of the outer tube, and selectively connectable to the distal end of the shaft pusher tube, the clip cartridge assembly including:
• a clip tray;
• a plurality of surgical clips slidably supported in the clip tray;
• a clip follower slidably disposed within the clip tray and disposed proximal of the plurality of surgical clips;
• a biasing member tending to urge the clip follower in a distal direction;
• and
• a clip pusher bar slidably supported adjacent the clip tray, wherein the clip pusher bar includes a proximal end configured for engagement by the distal end of the shaft pusher tube, and a distal end configured to engage a distal-most clip of the plurality of surgical clips.