Surgical stapler with improved operating lever mounting arrangement
First Claim
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1. An endoscopic surgical stapler, comprising:
- a frame including a handle portion configured to be held by a surgeon;
an elongated endoscopic portion joined to an extending from said frame, said endoscopic portion being insertable into a patient for effecting a plurality of surgical steps;
a staple cartridge portion at a distal end of said endoscopic portion, said cartridge containing a plurality of surgical staples;
an anvil positioned at said distal end of said endoscopic portion generally adjacent said staple cartridge;
a first operating linkage connected to said anvil for moving said anvil toward said cartridge to clamp tissue between said anvil and said cartridge;
a second operating linkabe for driving said staples out of said cartridge, and against said anvil for deforming said staples;
a first mounting boss on said frame defining a first generally annular bearing surface, and a second mounting boss on said frame defining a second generally annular bearing surface having an effective diameter substantially less than an effective diameter of said first bearing surface, said second mounting boss being positioned generally within and in spaced relationship to said first mounting boss, said first mounting boss having a C-shaped configuration defining a gap in the first bearing surface generally at a rearward portion thereof, said second mounting boss including a support strut extending generally from said second bearing surface into said gap defined by said first mounting boss; and
first and second operating levers respectively operatively connected with said first and second operating linkages, and respectively pivotally mounted on said first and second mounting bosses.
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Abstract
A surgical instrument, illustrated as an endoscopic surgical stapler, includes first and second operating linkages respectively operatively connected with first and second operating levers pivotally mounted on a frame of the instrument. An improved mounting arrangement is provided for the operating levers in the form of first and second mounting bosses. The mounting bosses are formed separately in order to isolate forces exerted thereon by the operating levers attendant to use of the instrument.
2033 Citations
8 Claims
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1. An endoscopic surgical stapler, comprising:
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a frame including a handle portion configured to be held by a surgeon; an elongated endoscopic portion joined to an extending from said frame, said endoscopic portion being insertable into a patient for effecting a plurality of surgical steps; a staple cartridge portion at a distal end of said endoscopic portion, said cartridge containing a plurality of surgical staples; an anvil positioned at said distal end of said endoscopic portion generally adjacent said staple cartridge; a first operating linkage connected to said anvil for moving said anvil toward said cartridge to clamp tissue between said anvil and said cartridge; a second operating linkabe for driving said staples out of said cartridge, and against said anvil for deforming said staples; a first mounting boss on said frame defining a first generally annular bearing surface, and a second mounting boss on said frame defining a second generally annular bearing surface having an effective diameter substantially less than an effective diameter of said first bearing surface, said second mounting boss being positioned generally within and in spaced relationship to said first mounting boss, said first mounting boss having a C-shaped configuration defining a gap in the first bearing surface generally at a rearward portion thereof, said second mounting boss including a support strut extending generally from said second bearing surface into said gap defined by said first mounting boss; and first and second operating levers respectively operatively connected with said first and second operating linkages, and respectively pivotally mounted on said first and second mounting bosses. - View Dependent Claims (2, 3, 4)
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5. A surgical instrument, comprising:
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a frame including a handle portion; a portion joined to and extending from said frame for effecting a plurality of surgical steps; a first operating linkage for effecting a first surgical step; a second operating linkage for effecting a second surgical step; a first mounting boss on said frame defining a first generally annular bearing surface, and a second mounting boss on said frame defining a second generally annular bearing surface axially spaced from and having an effective diameter substantially less than an effective diameter of said first bearing surface, said second mounting boss being positioned generally within and in spaced relationship to said first mounting boss, said first annular bearing surface being positioned closer to a wall of said frame than said second annular bearing surface; and first and second operating levers respectively operatively connected with said first and second operating linkages, and respectively pivotally mounted on said first and second mounting bosses. - View Dependent Claims (6, 7, 8)
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Specification