#$%^&*AU2018200867A120180920.pdf#####ADAPTER WITH CENTERING MECHANISM FOR ARTICULATION JOINT ABSTRACT A joint assembly (300) comprising: a proximal joint housing (310) defining a first longitudinal axis (A-A) and including a first hinge positioned (312) at a distal portion of the proximal joint housing (310)； a first ring (330) pivotally coupled to the first hinge (312) about a first pivot axis orthogonal to and intersecting the first longitudinal axis (A-A)； a joint cover (350) having a first cover portion and a second cover portion, the first cover portion pivotally coupled to the first hinge (312) about a second pivot axis orthogonal to and intersecting the first pivot axis and the first longitudinal axis, the first and second pivot axes intersecting the first longitudinal axis at a first joint center； a second ring (386) pivotally coupled to the second cover portion of the joint cover about a third pivot axis； a second hinge pivotally coupled to the second ring (386) about a fourth pivot axis orthogonal to the third pivot axis, the third and fourth pivot axes intersecting at a second joint center spaced from the first joint center, a cover axis of the joint cover defined between the first and second joint centers； and a biasing mechanism (340) engaged with the first ring (350) and the joint cover to bias the joint cover towards an aligned configuration in which the cover axis is aligned with the first longitudinal axis (A-A).4/19 620 622 610 612 11 300 208A FIG. 5
