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 for 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 at least a first aperture adjacent the channel, and the second shaft portion adjacent the first end of the arm portion including a second 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 at least a first side portion, the first side portion of the spring portion including a third aperture and a fourth aperture formed thereon,
• the collar portion including at least a first side portion, the first side portion of the collar portion including a first post portion and a fifth aperture, end portions of each of the first shaft portion and the second shaft portion adjacent the first end of the arm portion being positioned adjacent the first side portion of the collar portion, and portions of the first side portion of the collar portion being positioned adjacent the first side portion of the spring portion;
• and
• one of a first rod and a first fastener extending through the first aperture and the third aperture to attach the first shaft portion of the arm portion and the lever-spring portion, one of a second rod and a second fastener extending through the first aperture, the second aperture, and the fifth 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 fourth 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 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 for 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 at least a first aperture adjacent at least one side of the channel, and the second shaft portion adjacent the first end of the arm portion including a second aperture;
• a lever-spring portion having a handle portion and a spring portion,
• the handle portion being fixedly attached to the spring portion;
• the spring portion including at least a first side portion, the first side portion of the spring portion including a third aperture and a fourth aperture formed thereon,
• a collar portion including at least a first side portion, the first side portion of the collar portion including a first post portion and a fifth aperture, end portions of each of the first shaft portion and the second shaft portion adjacent the first end of the arm portion being positioned adjacent the first side portion of the collar portion, and portions of the first side portion of the collar portion being positioned adjacent the first side portion of the spring portion;
• and
• one of a first rod and a first fastener extending through the first aperture, and the third aperture to attach the first shaft portion of the arm portion and the lever-spring portion, one of a second rod and a second fastener extending through the first aperture, the second aperture, and the fifth 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 fourth aperture to attach the spring portion and the collar portion to one another;
• wherein movement of the one of the second rod and the second fastener toward the one of the first rod and the first fastener via movement of the handle portion from an unactuated position to an actuated position causes 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.