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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | UP-0242761 (2005-10-04) |
| 등록번호 | US-7641091 (2010-02-11) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 472 인용 특허 : 46 |
A staple drive assembly includes an actuation sled and at least one staple pusher. The staple drive assembly is adapted to fit within a staple cartridge having a plurality of staples and a corresponding number of retention slots. The at least one staple pusher includes at least one pusher plate for
A staple drive assembly includes an actuation sled and at least one staple pusher. The staple drive assembly is adapted to fit within a staple cartridge having a plurality of staples and a corresponding number of retention slots. The at least one staple pusher includes at least one pusher plate for releasably engaging a backspan of a staple. The staple pusher may include a plurality of pusher plates that may be laterally and longitudinally spaced apart. An actuation member has at least one angled camming surface for engaging a complimentary angled surface of the at least one staple pusher. Camming engagement between the actuation member and the at least one staple pusher causes vertical movement of the at least one staple pusher. Lateral and longitudinal offset of the actuation member camming surfaces and the corresponding staple pusher following surfaces improves stability and control of the staple pusher during firing.
What is claimed is: 1. A staple pusher comprising: a body defining a longitudinal axis, the body including: a first cam surface configured to facilitate camming motion and being angled at a first oblique angle relative to the longitudinal axis, the first cam surface having a proximal end and a dist
What is claimed is: 1. A staple pusher comprising: a body defining a longitudinal axis, the body including: a first cam surface configured to facilitate camming motion and being angled at a first oblique angle relative to the longitudinal axis, the first cam surface having a proximal end and a distal end; a second cam surface configured to facilitate camming motion and being angled at a second oblique angle relative to the longitudinal axis, the second cam surface having a proximal end and a distal end, wherein the second cam surface is longitudinally and laterally offset from the first cam surface; and at least one pusher plate supported by the first and second cam surfaces, the at least one pusher plate having a first end coupled to the body and a second end configured to receive a staple. 2. The staple pusher of claim 1, wherein each cam surface defines a first receiving angle and a second receiving angle. 3. The staple pusher of claim 2, wherein the first receiving angle is greater than the second receiving angle. 4. The staple pusher of claim 3, wherein the first receiving angle is about 35° and the second receiving angle is about 20°. 5. The staple pusher of claim 4, wherein the cam surfaces are substantially parallel to each other. 6. The staple pusher of claim 5, wherein each pusher plate is substantially parallel to the cam surfaces. 7. The staple pusher of claim 1, wherein the first cam surface is longitudinally offset from the second cam surface by about two-thirds of a length of the at least one pusher plate. 8. The staple pusher of claim 1, wherein the first oblique angle is different from the second oblique angle. 9. The staple pusher of claim 1, wherein the first and second cam surfaces define a gap therebetween.
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