Surgical stapler and methods

Abstract From the Canadian patent

Abstract of the Disclosure A surgical stapler includes a moving driver and an anvil moving in the same direction as the driver to pick off a staple from a supply and to, transport it to a forming station. The anvil is there stopped, but the driver continues to move forwardly forming the staple about the anvil. The anvil is locked against retraction until the driver is partially retracted in order to facilitate staple ejection. A drive linkage includes a four-bar linkage and a trigger mounted cam drive for dispersing required input forces over the trigger movement and minimizing force variations and maximum input. Modular features and construction provide use and manufacturing advantages. …