Patent ID: 7232230

Claim:
A drape assembly for maintaining a sterile field around a surgical microscope having at least one ocular port and an objective lens barrel having an inner peripheral wall defining a cavity, the assembly comprising: an elongated hollow enclosure of sheet-form material having a first end defining an access opening and a second end defining a hole; a cylindrical frame located on the enclosure second end, the cylindrical frame having an inner surface and an outer surface, the outer surface of the frame being engageable with the inner peripheral wall of the objective lens barrel for mounting the frame on the barrel within the cavity; a window support removably mountable within the cylindrical frame, the window support comprising a resilient circumferential band and a plurality of spaced integral tabs, the window support further having an outer diameter substantially the same as the inner diameter of the cylindrical frame and an outer surface removably engageable with the inner surface of the cylindrical frame; and a window matingly engaged with the window support, the frame, window support and window sealing the hole in the enclosure when the window support is removably mounted within the cylindrical frame.