Shoulder hold-down and locking mechanism therefor for use with a surgical frame

A locking mechanism, the locking mechanism comprising:

• an arm portion including a first shaft portion and a second shaft portion, the arm portion including a first end, an opposite second end, and a mid-longitudinal axis extending through the first end and the second end, the first shaft portion including a channel extending from at least adjacent the first end to at least adjacent the second end along the mid-longitudinal axis, the channel receiving portions of the second shaft portion therein, the first shaft portion including a first exterior surface, the second shaft portion including a second exterior surface, the first shaft portion adjacent the first end of the arm portion including a first aperture on a first side of the channel, the first shaft portion adjacent the first end of the arm portion including a second aperture on a second side of the channel, and the second shaft portion adjacent the first end of the arm portion including a third aperture;
• a lever-spring portion having a handle portion, a spring portion, and a collar portion,
• the handle portion being fixedly attached to the spring portion;
• the spring portion including a first side portion and a second side portion, the first side portion and the second side portion of the spring portion being spaced apart from one another, the first side portion of the spring portion including a fourth aperture and a fifth aperture formed thereon, and the second side portion of the spring portion including a sixth aperture and a seventh aperture formed thereon,
• the collar portion including a first side portion and a second side portion, the first side portion and the second side portion of the collar portion being spaced apart from one another, the first side portion of the collar portion including a first post portion and a eighth aperture, the second side portion of the collar portion including a second post portion and a ninth aperture, end portions of each of the first shaft portion and the second shaft portion adjacent the first end of the arm portion being received between the first side portion and the second side portion of the collar portion, and portions of the first side portion and the second side portion of the collar portion being received between the first side portion and the second side portion of the spring portion;
• and
• one of a first rod and a first fastener extending through the first aperture, the second aperture, the fourth aperture, and the sixth aperture to attach the first shaft portion of the arm portion and the lever-spring portion, to one another, one of a second rod and a second fastener extending through the first aperture, the second aperture, the third aperture, the eighth aperture, and the ninth aperture to attach the first shaft portion of the arm portion, the second shaft portion of the arm portion, and the collar portion to one another, and the first post portion being received in the fifth aperture and the second post portion being received in the sixth aperture to attach the spring portion and the collar portion to one another;
• wherein movement of the handle portion from an unactuated position to an actuated position causes pivotal movement of the first portion and the second portion of the spring portion about the one of the first rod and the first fastener, and causes corresponding movement of the first post portion and the second post portion toward the mid-longitudinal axis of the arm portion that causes movement of the one of the second rod and the second fastener toward the one of the first rod and the first fastener, movement of the one of the second rod and the second fastener toward the one of the first rod and the first fastener causing the second shaft portion to move at least partially out of the channel in the first shaft portion to expand the first shaft portion and the second shaft portion relative to one another.

A locking mechanism, the locking mechanism comprising:

• an arm portion including a first shaft portion and a second shaft portion, the arm portion including a first end, an opposite second end, and a mid-longitudinal axis extending through the first end and the second end, the first shaft portion including a channel extending from at least adjacent the first end to at least adjacent the second end along the mid-longitudinal axis, the channel receiving portions of the second shaft portion therein, the first shaft portion including a first exterior surface, the second shaft portion including a second exterior surface, the first shaft portion adjacent the first end of the arm portion including a first aperture on a first side of the channel, the first shaft portion adjacent the first end of the arm portion including a second aperture on a second side of the channel, and the second shaft portion adjacent the first end of the arm portion including a third aperture;
• a lever-spring portion having a handle portion, a spring portion, and a collar portion,
• the handle portion being fixedly attached to the spring portion;
• the spring portion including a first side portion and a second side portion, the first side portion and the second side portion of the spring portion being spaced apart from one another, the first side portion of the spring portion including a fourth aperture and a fifth aperture formed thereon, and the second side portion of the spring portion including a sixth aperture and a seventh aperture formed thereon,
• the collar portion including a first side portion and a second side portion, the first side portion and the second side portion of the collar portion being spaced apart from one another, the first side portion of the collar portion including a first post portion and a eighth aperture, the second side portion of the collar portion including a second post portion and a ninth aperture, end portions of each of the first shaft portion and the second shaft portion adjacent the first end of the arm portion being received between the first side portion and the second side portion of the collar portion, and portions of the first side portion and the second side portion of the collar portion being received between the first side portion and the second side portion of the spring portion;
• and
• one of a first rod and a first fastener extending through the first aperture, the second aperture, the fourth aperture, and the sixth aperture to attach the first shaft portion of the arm portion and the lever-spring portion to one another, one of a second rod and a second fastener extending through the first aperture, the second aperture, the third aperture, the eighth aperture, and the ninth aperture to attach the first shaft portion of the arm portion, the second shaft portion of the arm portion, and the collar portion to one another, and the first post portion being received in the fifth aperture and the second post portion being received in the sixth aperture to attach the spring portion and the collar portion to one another;
• wherein movement of the handle portion from an unactuated position to an actuated position causes pivotal movement of the first portion and the second portion of the spring portion about the one of the first rod and the first fastener, and causes corresponding movement of the first post portion and the second post portion toward the mid-longitudinal axis of the arm portion that causes movement of the one of the second rod and the second fastener toward the one of the first rod and the first fastener, movement of the one of the second rod and the second fastener toward the one of the first rod and the first fastener causing the second shaft portion to move at least partially out of the channel in the first shaft portion to expand the first shaft portion and the second shaft portion relative to one another;
• and
• wherein return movement of the handle portion from the actuated position to the unactuated position is resisted by flexion of portions of the spring portion.