A seal assembly for permitting hand assisted laparoscopic procedures includes a seal cap having a seal positioned within a housing. The housing includes a lower seal ring having a track which supports an upper seal ring for relative rotational motion, wherein the seal is supported between the upper seal ring and the lower seal ring for rotation between an open orientation and a closed orientation. The upper seal ring includes a first ring member and a second ring member oriented for movement relative thereto, wherein a latching mechanism is positioned between the first ring member and the second ring member for selectively controlling movement of the first ring member relative to the second ring member. The seal assembly also includes a rotational control mechanism controlling motion of the upper seal ring relative to the lower seal ring.