Paragraph Number

119

In one embodiment, the middle 1006 may include a section 1012 that includes a planar surface 1014. The planar surface 1014 of the section 1012 may serve as part of the lock-out mechanism 130. For example in one embodiment, the set screw 908 may bias against the planar surface 1014 of the pin 158 to prevent rotation of the pin 158. In the illustrated embodiment, the section 1012 has a D-shaped cross-section. In one embodiment, the D-shaped cross-section of the section 1012 may be offset 90 degrees from a D-shaped cross-section of the proximal end 1002 that includes the flat part 1008. In one example embodiment, the 90-degree offset enables a needle 172 to register/measure no imbalance when the lock-out mechanism 130 is activated to prevent rotation of the pin 158.

Added by DJM 2 2021