US Patent 11849949 Surgical stapling device with firing lockout member

A surgical stapling device includes a tool assembly and a drive assembly. The tool assembly includes an anvil assembly, and a cartridge assembly that includes a channel member and a staple cartridge. The staple cartridge includes a cartridge body, staples, pushers, and an actuation sled. The drive assembly has a working member that is movable through the tool assembly to advance the actuation sled through the staple cartridge and actuate the tool assembly. The anvil assembly supports a lockout member that interacts with the drive assembly when the actuation sled is not positioned in a proximal portion of the cartridge body to prevent advancement of the drive assembly and firing of the stapling device.