초록 ▼

The present invention relates to an apparatus for applying hemostatic or ligating clips. The apparatus is provided with a unitary chassis on which all other components are attached. A clip housing is disposed at the forward end of the apparatus and stores a plurality of abuttingly arranged forward f

The present invention relates to an apparatus for applying hemostatic or ligating clips. The apparatus is provided with a unitary chassis on which all other components are attached. A clip housing is disposed at the forward end of the apparatus and stores a plurality of abuttingly arranged forward facing clips that are fed one at a time to the jaws. Upon closure of the handles, the jaws are drawn rearwardly into the apparatus and cammed closed to deform a clip positioned between the jaws. Upon release of the handles, the apparatus returns to its unactuated position and advances a clip to the jaws. The apparatus includes a lockout member to prevent actuation of the apparatus while a clip is in transition from the clip housing to the jaws.

대표청구항 ▼

An apparatus for applying hemostatic clips comprising: a one piece elongate chassis running the length of the apparatus for supplying structural strength to the apparatus, said chassis having a front portion and a rear portion; a pair of opposed jaws associated with said front portion of said chassi

An apparatus for applying hemostatic clips comprising: a one piece elongate chassis running the length of the apparatus for supplying structural strength to the apparatus, said chassis having a front portion and a rear portion; a pair of opposed jaws associated with said front portion of said chassis for deforming a clip about a blood vessel; clip housing and feed means overlying said front portion of said chassis and communicating with said jaws for storing said clips and for advancing said clips to said jaws, said clip housing and feed means including a channel shaped skirt having a bottom and two upstanding, opposed side walls, a ratchet advancer slidably supported within said skirt for supporting a plurality of the clips, a housing cover disposed in overlying relation to said ratchet advancer and attached to said skirt to create a clip storage cavity for enclosing said clips, said housing cover being provided with a ratchet surface disposed in spaced overlying relationship with said ratchet advancer, pawl means for advancing the clips through the housing, said pawl means having means for alternately engaging the ratchet advancer as the ratchet advancer moves forward such that the pawl means is moved forward with the ratchet advancer, and for engaging the ratchet surface as the ratchet advancer moves rearward to prevent rearward movement of the pawl means, and spring means for transferring the forwardmost clip from the clip housing and feed means to the clip positioning and deforming means; clip positioning and deforming means for receiving a clip from said clip housing and feed means, advancing the clip to said jaws and deforming the clip about a vessel, said clip positioning and deforming means including a reciprocating drawbar disposed on said forward portion of said chassis and having a forward and a rearward end, said forward end defined by a pair of resilient jaw arms, said jaw arms incorporating said opposed jaws at the distal ends thereof, a resilient clip load platform subtending said jaw arms and operatively associated with said clip housing and feed means to receive the forwardmost clip from said clip housing and feed means and position the clip for advancement to said jaws, a resilient tissue stop extending from said clip load platform and subtending said jaws for preventing a vessel from forcing a clip positioned between said jaws rearwardly into the apparatus during actuation, and an elongate clip advancer reciprocably disposed between said drawbar and said front portion of said chassis for advancing individual clips to said jaws from said clip load platform; and transmission means for actuating said clip housing and feed means and said clip positioning and deforming means, said transmission means including a pair of handles pivotally connected to said rear portion of said chassis and movable between a first open position and a second closed position, a trigger spring for assisting in returning said handles to said first open position after being moved to said second closed position, a gear housing fixably mounted to said rear portion of said chassis, a reciprocating drawbar extension slideably mounted within said gear housing for engaging the rearward end of said drawbar, said drawbar extension further including an integral gear rack, a pair of links interconnecting said handles and said draw bar extension to transfer the radial movement of said handles into linear movement of said draw bar extension, a compound gear and an idler gear rotatably mounted on said gear housing and each having an upper and lower portion, said upper portion of said compound gear defining a pinion gear and engaging the rack gear of said draw bar extension, and said lower portion of said compound gear defining a gear segment for engaging and rotating said lower portion of said idler gear, said upper portion of said idler gear defining a pinion gear and engaging and reciprocating said rack gear of said ram, and a draw bar spring connected between said rearward end of said draw bar and said chassis to bias said draw bar in a forward position when said apparatus is in an unactuated position.