Endoscopic clip appliers
First Claim
1. In an instrument for applying surgical ligating clips, said instrument comprising a housing, a first activating mechanism for feeding the clips successively to a position in which they may be crimped and a second activating mechanism for crimping a clip at said position, the improvement comprising:
- trigger means for selectively enabling the operation of said first activating mechanism, said trigger means comprising;
pawl means operatively secured to said first activating mechanism and adapted to slide within said housing along a predetermined track;
a pawl post attached to said pawl means and deflectable from a normal, unbiased position to a biased position as said pawl means slides proximally;
ramp means fixedly situated relative to said predetermined track and adapted to have said pawl post slidably move along said ramp means as said pawl means slides proximally;
stop means to engage said pawl post to prevent it from moving distally beyond a predetermined point along said track;
means operable by a user of said instrument to disengage said pawl post from said stop means.
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Accused Products
Abstract
A hemostatic clip applier is disclosed showing improvements which enable the user to selectively trigger the feeding of a clip to the jaws of the applier when desired. A cantilevered trigger button is integrally formed with the housing of the applier so as to be depressible by the user. The trigger button is provided with an internal cam surface which cooperates with a pawl and ratchet mechanism to release the pawl at a selected point in the cycle of operation of the applier and thereby feed a clip to the applier jaws.
469 Citations
6 Claims
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1. In an instrument for applying surgical ligating clips, said instrument comprising a housing, a first activating mechanism for feeding the clips successively to a position in which they may be crimped and a second activating mechanism for crimping a clip at said position, the improvement comprising:
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trigger means for selectively enabling the operation of said first activating mechanism, said trigger means comprising; pawl means operatively secured to said first activating mechanism and adapted to slide within said housing along a predetermined track; a pawl post attached to said pawl means and deflectable from a normal, unbiased position to a biased position as said pawl means slides proximally; ramp means fixedly situated relative to said predetermined track and adapted to have said pawl post slidably move along said ramp means as said pawl means slides proximally; stop means to engage said pawl post to prevent it from moving distally beyond a predetermined point along said track; means operable by a user of said instrument to disengage said pawl post from said stop means. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification