In an outer sheathed endoscope, an outer sheath (20) for shielding a flexible insertion portion (11, 12, 13) from the outside is disposed to detachably cover the flexible insertion portion (11, 12, 13). The basal end of the flexible insertion portion is connected to an operation portion (15). In the...http://www.google.se/patents/US20030220545?utm_source=gb-gplus-sharePatent US20030220545 - Outer sheathed endoscope
