| 摘要 |
A surgical instrument including a handle portion, a body portion, a movable handle, a tool assembly, a drive beam and a closure apparatus is disclosed. At least one of the closure apparatus and a contact surface of the tool assembly include a plastic surface. The body portion extends distally from the handle portion. The movable handle is located on the handle portion and is in mechanical cooperation with a drive member. The tool assembly includes an anvil, a cartridge assembly and a contact surface. The drive beam includes a proximal engagement portion and is configured to engage a portion of the drive member. The closure apparatus is configured to engage the contact surface of the tool assembly. At least a partial actuation of the movable handle moves the closure apparatus distally into engagement with the contact surface to approximate the anvil and the cartridge assembly. |
| 主权项 |
1. A surgical instrument comprising:
a body portion; a tool assembly supported on a distal end of the body portion, the tool assembly including a cartridge assembly, and an anvil assembly pivotally connected to the cartridge assembly such that the tool assembly is repositionable between an open position and a closed position; and a closure apparatus distally movable through the tool assembly to reposition the tool assembly from the open position to the closed position, the closure apparatus having upper and lower flange portions formed from a first material, and a vertical beam portion interconnecting the upper and lower flange portions, the upper and lower flange portions each including internal and external surfaces extending transversely in relation to the vertical beam portion, the closure apparatus further including an insert formed from a second material different than the first material, the insert being positioned within a hole formed in at least one of the upper and lower flange portions and extending between the internal and external surfaces thereof, the insert extending onto at least a portion of the internal surface of at least one of the upper flange portion and the lower flange portion. |
