Patent ID: 6986225

Claim:
A system engaged with and pivotally supporting a frame having opposing faces, the frame being mounted on a casing, the system engaging either one face or an opposing face, the system comprising: a pivot located between the casing and the frame at opposing positions along an axis which passes through the center of the frame for rotating the frame thereabout from 0-180 degrees; deformable sealing elements positioned about a periphery of the frame and attached to one of either the casing or the frame for sealing between the casing and the frame; connectors located on opposing faces of the frame and on opposing sides of the pivot to permit the frame to be alternately connected to the casing by the one face of the frame or by the opposing face of the frame; and an opening and closing device, alternately connectable between the casing and the connector on the one face and the connector on the opposing face of the frame so that, when connected, the opening and closing device can be actuated to open and close the frame relative to the casing, and when not connected, the frame can be rotated about the pivot to permit pivoting 180°.