Clamp assembly for fixing a navigation tracker to a portion of bone

A surgical attachment system for fixing a navigation tracker to a portion of bone, the surgical attachment system comprising:

• an extension arm with a first end and a second end, an arm axis being defined between the first and second ends;
• an attachment interface at the first end of the extension arm and being configured to detachably couple to the navigation tracker;
• and
• a clamp assembly disposed at the second end of the extension arm and comprising:
• a first clamp jaw comprising a first engagement surface;
• a second clamp jaw comprising a second engagement surface, wherein the second clamp jaw faces the first clamp jaw and is pivotal about a first fixed pivot that is fixed relative to the first clamp jaw;
• a linear driver comprising a shaft that is configured to linearly translate;
• a first linkage pivotal at one end about a second fixed pivot that is fixed relative to the first clamp jaw, and coupled at an opposing end to the shaft at a first moving pivot;
• a second linkage coupled at one end to the shaft at the first moving pivot, and coupled at an opposing end to the second clamp jaw at a second moving pivot;
• and
• wherein the linear driver is configured to linearly translate the shaft to apply force to the first moving pivot in a first direction to pivot the second clamp jaw towards the first clamp jaw, and to apply force to the first moving pivot in a second direction opposite to the first direction to pivot the second clamp jaw away from the first clamp jaw.

An assembly comprising:

• a navigation tracker;
• and
• a surgical attachment system for fixing the navigation tracker to a portion of bone, the surgical attachment system comprising:
• an extension arm with a first end and a second end, an arm axis being defined between the first and second ends;
• an attachment interface at the first end of the extension arm and coupled to the navigation tracker;
• and
• a clamp assembly disposed at the second end of the extension arm and comprising:
• a first clamp jaw comprising a first engagement surface;
• a second clamp jaw comprising a second engagement surface, wherein the second clamp jaw faces the first clamp jaw and is pivotal about a first fixed pivot that is fixed relative to the first clamp jaw;
• a linear driver comprising a shaft that is configured to linearly translate;
• a first linkage pivotal at one end about a second fixed pivot that is fixed relative to the first clamp jaw, and coupled at an opposing end to the shaft at a first moving pivot;
• a second linkage coupled at one end to the shaft at the first moving pivot, and coupled at an opposing end to the second clamp jaw at a second moving pivot;
• and
• wherein the linear driver is configured to linearly translate the shaft to apply force to the first moving pivot in a first direction to pivot the second clamp jaw towards the first clamp jaw, and to apply force to the first moving pivot in a second direction opposite to the first direction to pivot the second clamp jaw away from the first clamp jaw.