Patent ID: 6929144

Claim:
A locking device of a pressure vessel provided with a door which seals a chamber comprising: a locking pin receiving member which is installed on one side of the front of said chamber and in which a locking pin receiving hole is formed in the vertical direction, a spindle receiving member which is installed in the front of said chamber in a position opposite said locking pin receiving member with an opening of said chamber in between and in which a hole is formed in the vertical direction, a support frame of which a portion of one side is fixed on the outer surface of said door and of which both ends extend beyond the boundary limited by the outer circumference of said door and of which one end is rotatably couple with said spindle receiving member by a spindle and thereby said door is rotated about said spindle and opens and closes said chamber, and a shifting member having a handle, a locking pin which can shift vertically within said support frame, and a connecting member which connects said handle and said locking pin, wherein a pass-through hole which can be inter-connected with the hole of said locking pin receiving hole, and a groove which extends in a longitudinal direction by a predetermined length from said pass-through hole to the center of said support frame, are formed on the other end of said support frame, and the connecting member of said shifting member can be inserted into said groove.