Patent ID: 6499439
Filing Date: 2002-12-31
Classification: F23M

Abstract:
A sight glass assembly comprising(a) a frame casing having a front face, side walls, an upper wall, a lower wall, an opening in the front face, and securment extensions which extend from at least two of the side walls; (b) a piece of planar transparent material having an outer perimeter dimensioned to fit within the walls of the frame, and to span the opening in the front face, wherein the walls extend over the edges of the transparent material; (c) a generally planar gasket having an outer perimeter greater than an outer perimeter of the casing, and an opening having a perimeter less than the outer perimeter of the transparent material wherein the securement extensions are configured to engage with a structure having an opening generally aligned with the openings in the gasket and the frame to provide a sight glass through the opening in the structure.