Surgical instrument with integral knife blade
First Claim
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1. A surgical instrument comprising:
- an end effector including two opposed jaws coupled to an elongated shaft;
a housing included in one of the two opposed jaws, the housing including a housing proximal end and a housing distal end, the housing having a housing receptacle;
a drive member slidably mounted in the housing; and
a knife member movably supported within the housing, the knife member including;
a body portion;
a first protrusion extending from the body portion transversely to a cutting plane of the knife member, the first protrusion being accommodated by the housing receptacle and retained within the housing receptacle via engagement with the receptacle and an upper surface of the drive member during a first movement of the drive member toward the housing distal end from a first position to a second position, the first protrusion being dislodged from the housing receptacle during a second movement of the drive member toward the housing distal end from the second position to a third position; and
a cutting blade attached to the body portion and configured to cut tissue along the cutting plane when the knife member is moved toward the housing distal end.
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Abstract
A cartridge of a surgical instrument includes a housing, a lead screw mounted for rotation in the housing, a drive member operatively coupled with the lead screw, and a knife member. The knife member is driven distally by the drive member and is configured to cut when moved distally. During an initial distal movement of the drive member, the knife member is coupled with the housing to restrain the knife member from moving distally. Subsequent to the initial distal movement of the drive member, the drive member drives the knife member toward the distal end.
825 Citations
14 Claims
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1. A surgical instrument comprising:
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an end effector including two opposed jaws coupled to an elongated shaft; a housing included in one of the two opposed jaws, the housing including a housing proximal end and a housing distal end, the housing having a housing receptacle; a drive member slidably mounted in the housing; and a knife member movably supported within the housing, the knife member including; a body portion; a first protrusion extending from the body portion transversely to a cutting plane of the knife member, the first protrusion being accommodated by the housing receptacle and retained within the housing receptacle via engagement with the receptacle and an upper surface of the drive member during a first movement of the drive member toward the housing distal end from a first position to a second position, the first protrusion being dislodged from the housing receptacle during a second movement of the drive member toward the housing distal end from the second position to a third position; and a cutting blade attached to the body portion and configured to cut tissue along the cutting plane when the knife member is moved toward the housing distal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification