Variable closure surgical stapling apparatus with retractable anvil

A surgical apparatus for suturing skin with deformable staples comprising:

• a housing having an elongated drive track with one end thereof adapted to be placed against the skin;
• means for feeding staples to said drive track at a point adjacent said one end;
• anvil means of generally crescent-shaped configuration having opposed ends, with one end thereof including a forming member and with the remaining end thereof including a locking projection, said anvil means being pivotally mounted to said housing, adjacent said one end of said drive track with said forming member extending into said drive track;
• an elongated anvil release element mounted for reciprocal movement in said drive track above said anvil means, and with the lower end thereof including an aperture disposed adjacent to and above said locking projection of said anvil means;
• and
• an elongated driver element mounted for reciprocal movement in said drive track and disposed over said staple and in coplanar relationship with said anvil release element, said driver element being interposed between said anvil means and said anvil release element, said driver element including an aperture disposed above said locking member of said anvil means and with the lower end of said driver element including a configuration to aid in deforming said staple such that upon downward actuation of said driver element, the latter bears upon the staple such that it is deformed about said forming member in said drive track and wherein said staple is released from said apparatus by the downward actuation of said anvil release element in a manner such that said apertures in said elements are in register, adjacent said locking projection of said anvil means, thereby enabling said anvil means to pivot, with said locking member being received in said aligned apertures such that said forming member is retracted from said drive track permitting the release of said deformed staple.