The present invention provides a pre-embedded/pre-built-in hole creating apparatus for buildings, including: a pipe casing for a pipe or a pipeline system of the building to pass there through; at least one thermal-expandable foam detachably accommodated within the pipe casing; an inspection annulus detachably joined with the pipe casing; and a slide cover installed onto the pipe casing and secured to the building structure. The at least one thermal-expandable foam in the hole creating apparatus embedded in the building structure can be removed via the detachable structure for inspection and replacement so as to maintain the flame-retardant function of the hole creating apparatus. Said apparatus further includes an annular shielding plate providing functions of airtight and smoke blocking for the through pipes as well as includes an identifying device providing information, tracking and service associated with the apparatus in order to guarantee long term safety.

The present invention provides a pre-embedded/pre-built-in hole creating apparatus for buildings, including: a pipe casing for a pipe or a pipeline system of the building to pass there through; at least one thermal-expandable foam detachably accommodated within the pipe casing; an inspection annulus detachably joined with the pipe casing; and a slide cover installed onto the pipe casing and secured to the building structure. The at least one thermal-expandable foam in the hole creating apparatus embedded in the building structure can be removed via the detachable structure for inspection and replacement so as to maintain the flame-retardant function of the hole creating apparatus. Said apparatus further includes an annular shielding plate providing functions of airtight and smoke blocking for the through pipes as well as includes an identifying device providing information, tracking and service associated with the apparatus in order to guarantee long term safety.

A wire harness grommet includes a grommet body including a first flared portion, a second flared portion and a narrow portion between the first flared portion and the second flared portion. The first flared portion has a wire receiving opening extending therethrough for receiving one or more wires. A pull handle has a first end located at a first side of the first flared portion and a second end located at an opposite, second side of the first flared portion forming a closed loop.

A wire harness grommet includes a grommet body including a first flared portion, a second flared portion and a narrow portion between the first flared portion and the second flared portion. The first flared portion has a wire receiving opening extending therethrough for receiving one or more wires. A pull handle has a first end located at a first side of the first flared portion and a second end located at an opposite, second side of the first flared portion forming a closed loop.

A fastening system for a pipe passing through an insulating side panel of an air handling unit. The panel includes two parallel walls separated by a layer of insulating material, a hole provided through the walls and a layer of insulating material for passing the pipe. The fastening system includes two bellows fixed on each of the parallel walls of the pane around the hole. Each bellow includes a frame fixed on one of the walls and a deformable portion fixed to the frame. The deformable portion includes a wide portion which connects the deformable portion to the frame, and a narrow portion fitted around the pipe.

A fastening system for a pipe passing through an insulating side panel of an air handling unit. The panel includes two parallel walls separated by a layer of insulating material, a hole provided through the walls and a layer of insulating material for passing the pipe. The fastening system includes two bellows fixed on each of the parallel walls of the pane around the hole. Each bellow includes a frame fixed on one of the walls and a deformable portion fixed to the frame. The deformable portion includes a wide portion which connects the deformable portion to the frame, and a narrow portion fitted around the pipe.

A sealing membrane assembly including a flange having a body with a through passage. A first sealing membrane defines a first flexible panel with a first axial sealed opening extending therethrough. The first axial sealed opening extends at an acute angle. A second sealing membrane defines a second flexible panel with a second axial sealed opening extending therethrough. The second axial sealed opening extends at an obtuse angle. The first and second sealing membranes are secured relative to the flange such that the first and second axial sealed openings crisscross one another and the first and second sealing membranes seal the through passage except through the first and second sealed openings.

A sealing membrane assembly including a flange having a body with a through passage. A first sealing membrane defines a first flexible panel with a first axial sealed opening extending therethrough. The first axial sealed opening extends at an acute angle. A second sealing membrane defines a second flexible panel with a second axial sealed opening extending therethrough. The second axial sealed opening extends at an obtuse angle. The first and second sealing membranes are secured relative to the flange such that the first and second axial sealed openings crisscross one another and the first and second sealing membranes seal the through passage except through the first and second sealed openings.

A drain coupler includes a drain coupler body having a lower opening and an upper opening. A pliable seal is carried by or adjacent the upper opening, the pliable seal operable to form a water-tight seal about an exterior of a metallic throat section of a drain. Coupler engagement structure is carried by the drain coupler adjacent the upper opening of the drain coupler body. Cap engagement structure is carried by a cap. The cap engagement structure and the coupler engagement structure cooperatively enable removable engagement of the cap over the upper opening of the drain coupler body to temporarily cover the upper opening of the drain coupler. The cap is removable to allow insertion of the metallic throat section in the pliable seal.

A drain coupler includes a drain coupler body having a lower opening and an upper opening. A pliable seal is carried by or adjacent the upper opening, the pliable seal operable to form a water-tight seal about an exterior of a metallic throat section of a drain. Coupler engagement structure is carried by the drain coupler adjacent the upper opening of the drain coupler body. Cap engagement structure is carried by a cap. The cap engagement structure and the coupler engagement structure cooperatively enable removable engagement of the cap over the upper opening of the drain coupler body to temporarily cover the upper opening of the drain coupler. The cap is removable to allow insertion of the metallic throat section in the pliable seal.