Patent ID: 6639745
Filing Date: 2003-10-28
Classification: A61G,G02B

Abstract:
An observation window of a hyperbaric oxygen chamber, comprising a frame having an annular holding portion defining a central observation hole; the frame being joined to a wall of the chamber by means of solder welding with the central observation hole being aligned with a hole of the wall; the holding portion having an annular trench on an inner side of an outward end thereof;a transparent member having an annular slope on an outer side of one end thereof, and an annular recess formed adjacent to an inner end of the annular slope on an outer side thereof; the transparent member being closely fitted into the holding portion with the annular recess being faced with the annular trench of the holding portion, and with an O-shaped ring being fitted between the annular recess and the annular trench to prevent gas from traveling through a joint between the transparent member and the frame plus to prevent the transparent member from falling off the frame.