Chimney cleaning and inspection hatch - has grooved inner frame forming sliding sleeve for inserted compressible joining material

摘要

The cleaning and inspection hatch for mounting in a chimney, air vent shaft etc, comprises an inner tube, a layer of insulating material, and brick cladding, together with a lockable door hinging on a frame, and an inner frame. The door frame (1), inner chamber section (5) and inner frame (6) together have an overall depth equal to the distance between the outside of the chimney (17) with rendering surface (14) and the surface (18) of the inside wall (7). The inner frame is grooved, with an inserted inlay (10) of compressible jointing material and sharp top and bottom edges (11,12) forming a sliding sleeve accommodating this material. Both frames (1,6) protrude beyond the inner chamber section and form a fixed anchorage in the cladding without additional securing devices.