Surgical sagittal saw for actuating a saw blade with an oscillating head, the saw having a coupling assembly for releaseably holding the saw blade

A surgical saw for use with a blade assembly having a blade bar, at least one drive rod moveably disposed within the blade bar and a blade head that is oscillated by the at least one drive rod, said saw comprising:

• a housing including a head, said head having a surface for receiving the blade assembly blade bar;
• a motor disposed in said housing;
• an oscillating drive assembly mounted to said housing head that includes at least one drive member that is moveably mounted to said head adjacent the surface on which the blade assembly bar is received, said oscillating drive member shaped to receive the blade assembly at least one drive rod, wherein said oscillating drive assembly is connected to said motor and configured to, upon actuation of said motor, oscillate the at least one drive member so that the oscillation of the at least one drive member results in the reciprocation of the at least drive rod;
• a coupling member separate from said oscillating drive assembly that is moveably mounted to said housing head so as to extend above the housing head surface, said coupling member shaped to extend at least partially over the blade assembly blade bar and having a run state in which said coupling member presses against the blade bar to hold the blade bar to the housing head surface and a load state in which the coupling member allows the insertion/removal of the blade bar from the housing head surface;
• and
• a manually actuated control member moveably attached to said housing and connected to said coupling member for moving said coupling member between the run and load states.

A surgical saw for use with a blade assembly having a blade bar, at least one drive rod moveably disposed within the blade bar and a blade head that is oscillated by the at least one drive rod, said saw comprising:

• a housing including a head, said head having a surface for receiving the blade assembly blade bar;
• a motor disposed in said housing;
• an oscillating drive assembly mounted to said housing head that includes at least one drive member that is moveably mounted to said head adjacent the surface on which the blade assembly bar is received, said oscillating drive member shaped to receive the blade assembly at least one drive rod, wherein said oscillating drive assembly is connected to said motor and configured to, upon actuation of said motor, oscillate the at least one drive member so that the oscillation of the at least one drive member results in the reciprocation of the at least drive rod;
• a coupling member separate from said oscillating drive assembly is moveably mounted to said housing head so as to extend above the housing head surface, said coupling member being shaped to extend at least partially over the blade assembly blade bar and having a run state in which said coupling member presses against the blade bar to hold the blade bar to the housing head surface and a load state in which the coupling member allows the insertion/removal of the blade bar from the housing head surface;
• a manually actuated control member moveably attached to said housing head and connected to said coupling member for moving the coupling member between the run and load states;
• and
• a first biasing member that abuts said coupling member and that is connected to said control member so that the actuation of said control member to place said coupling member in the run state results in the displacement of said first biasing element that results in said first biasing element holding said coupling member in the run state.

A surgical saw for use with a blade assembly having a blade bar, at least one drive rod moveably disposed within the blade bar and a blade head that is oscillated by the at least one drive rod, said saw comprising:

• a housing including a head, said head having a surface for receiving the blade assembly blade bar;
• a motor disposed in said housing;
• an oscillating drive assembly mounted to said housing head that includes at least one drive member that is moveably mounted to said head adjacent the surface on which the blade assembly bar is received, said oscillating drive member shaped to receive the blade assembly at least one drive rod, wherein said oscillating drive assembly is connected to said motor and configured to, upon actuation of said motor, oscillate the at least one drive member so that the oscillation of the at least one drive member results in the reciprocation of the at least drive rod;
• a coupling rod mounted to said housing head, said coupling rod shaped to have a head that is positioned to extend over the blade assembly blade bar, said coupling rod being slidably mounted to said housing head so as to move between a run position in which said rod head is located adjacent the housing head surface so as to hold the blade assembly blade bar against said housing head and a load position in which said coupling rod is spaced from the housing head surface so as to allow removal of the blade assembly blade bar;
• and
• a control member moveably mounted to said housing, said control member being connected to said coupling rod so that the manual actuation of said control member moves said coupling rod between the run and load positions.