Surgical stapler

Claim 1

A surgical stapler, comprising: a first jaw having a plurality of staple extruding pieces thereon; a second jaw having at least one row of anvil grooves, each said anvil groove comprising at least one arc-shaped bottom surface comprising a single arc having a length substantially equal to the height of the leg portions of a staple, and said anvil grooves of said at least one row being arranged aslant relative to the direction of said at least one row of anvil grooves; a cartridge holding member mounted between said first and second jaws and having a cartridge hole; a staple cartridge having at least one row of staple chambers therein into which staples can be inserted, said staple cartridge being detachably fitted into said cartridge hole in said cartridge holding member, said staple chambers being located opposite to said staple extruding pieces and said anvil grooves, and said staple chambers of said at least one row being arranged aslant relative to the direction of said at least one row of staple chambers; wherein said first jaw, said cartridge holding member and said second jaw are pivotally connected by a first axial pin, a first handle is connected to said first jaw by a second axial pin, and a second handle is connected to said second jaw through a third axial pin; wherein said first and second handles are pivotally connected by a fourth axial pin so as to open and close said first and second jaws by operating said first and second handles; and wherein each said anvil groove has two said arc-shaped bottom surfaces staggered in position relative to each other in the lengthwise direction.