Methods and apparatuses for additively manufactured tubular passages, additively manufactured manifolds, and additively manufactured heaters are provided.

Methods and apparatuses for additively manufactured tubular passages, additively manufactured manifolds, and additively manufactured heaters are provided.

A duct apparatus comprises a first duct section (9) and a second duct section (9), each duct section being provided with a connector assembly (1,1) for use in connecting the first duct section to the second duct section. Each connector assembly comprises a plurality of flange elements (2), and a plurality of corner elements (3). Each flange element includes attachment means for attachment of an end face of the duct section thereto, and each corner element engages with two flange elements. The first duct section is attached to the second duct section using a two-sided adhesive tape (13) applied around the perimeter of the connector assembly of the first duct section. The two-sided tape both adheres the first section to the second duct suction and provides a seal between the two duct sections. A method of connecting a first duct section to a second duct section using the duct apparatus is also provided.

A duct apparatus comprises a first duct section (9) and a second duct section (9), each duct section being provided with a connector assembly (1,1) for use in connecting the first duct section to the second duct section. Each connector assembly comprises a plurality of flange elements (2), and a plurality of corner elements (3). Each flange element includes attachment means for attachment of an end face of the duct section thereto, and each corner element engages with two flange elements. The first duct section is attached to the second duct section using a two-sided adhesive tape (13) applied around the perimeter of the connector assembly of the first duct section. The two-sided tape both adheres the first section to the second duct suction and provides a seal between the two duct sections. A method of connecting a first duct section to a second duct section using the duct apparatus is also provided.

A waveguide connecting apparatus including two waveguide connecting clamps each including a pair of clamp pieces positioned to oppose each other and sandwich outer peripheral portions of flanges positioned to oppose each other. A fastener pressing the pair of clamp pieces against the outer peripheral portions of the flanges. Each clamp piece includes two abutting members having first faces abutting against faces on the opposite side of faces that oppose each other of the flanges positioned to oppose each other. Second faces abutting against side faces of the waveguides, and third faces serving as tapered faces of the flanges, on the opposite side of the faces opposing each other. A pressing member with a substantially V-shaped cross section, having two inclined faces engaging with the respective third faces of the abutting members, and holding the two abutting members such that the two abutting members are respectively movable in the directions of inclination of the inclined faces with which the two abutting members respectively engage. The two waveguide connecting clamps are positioned such that directions in which the pairs of clamp pieces oppose each other intersect each other.

A duct flange structure which has a higher strength and which is easier to handle and manufacture. The duct flange structure is arranged in an end portion of a duct body having a substantially quadrilateral shape in section that includes a flange portion formed by bending an extension portion extending from an opening edge of each of wall plates constituting the duct body, the flange portion being constituted by a vertical portion extending outside substantially vertically to the wall plate and a horizontal portion extending substantially parallel to the wall plate from the vertical portion, the vertical portion and the horizontal portion being formed by folding and superposing the extension portion in two layers so as to form two adjacent wall portions.

A duct flange structure which has a higher strength and which is easier to handle and manufacture. The duct flange structure is arranged in an end portion of a duct body having a substantially quadrilateral shape in section that includes a flange portion formed by bending an extension portion extending from an opening edge of each of wall plates constituting the duct body, the flange portion being constituted by a vertical portion extending outside substantially vertically to the wall plate and a horizontal portion extending substantially parallel to the wall plate from the vertical portion, the vertical portion and the horizontal portion being formed by folding and superposing the extension portion in two layers so as to form two adjacent wall portions.

A fire-rated conduit assembly. The fire-rated conduit assembly comprises a plurality of pre-fabricated, e.g. factory fabricated, modular sections that are configured to be mechanically assembled to form a continuous fire-rated conduit which is suitable for allowing movement of air, transporting of combustible or hazardous materials, and/or enclosing building mechanical and services.

Methods and apparatuses for additively manufactured tubular passages, additively manufactured manifolds, and additively manufactured heaters are provided.

Methods and apparatuses for additively manufactured tubular passages, additively manufactured manifolds, and additively manufactured heaters are provided.