发明名称 |
Surgical stapling instrument having preloaded firing assistance mechanism |
摘要 |
A surgical severing and stapling instrument clamps tissue in a staple applying assembly comprising a lower jaw of an elongate channel holding a staple cartridge and a pivotally opposed upper jaw (anvil). A firing handle drives a rack in a handle connected to a firing rod and bar that pass through an elongate shaft and into the staple applying assembly to sever and staple tissue. Upon release of the firing handle, a retraction spring assists in withdrawing the rack and other firing components. To advantageously assist in firing, a spring biased plunger is cocked prior to firing to impart assistance upon depression of the firing trigger. Alternatively, a torsion coil spring ratchet mechanism is preload to act through a gear into the rack to assist. As a further alternative, a retraction spring is preload and disengaged until the rack is fully fired.
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申请公布号 |
US7357287(B2) |
申请公布日期 |
2008.04.15 |
申请号 |
US20050238291 |
申请日期 |
2005.09.29 |
申请人 |
ETHICON ENDO-SURGERY, INC. |
发明人 |
SHELTON, IV FREDERICK E.;SWAYZE JEFFREY S.;TIMPERMAN EUGENE L.;FUGIKAWA LESLIE M. |
分类号 |
A61B17/072;A61B17/068 |
主分类号 |
A61B17/072 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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