GB2467109A

GB2467109A - Method of installing a duct from inside a room

Info

Publication number: GB2467109A
Application number: GB0812256A
Authority: GB
Inventors: Peter Arezina
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-04
Filing date: 2008-07-04
Publication date: 2010-07-28
Anticipated expiration: 2028-07-04
Also published as: GB2467109B; GB0812256D0

Abstract

A method of installing a duct comprises passing a first (external) duct 4 from inside a room through a hole in a wall 3, 11 until a closed (collapsed / folded) flexible shroud 1 and a plurality of spring biased non-return stops 2 at the end of the first duct passes out of the wall. When passed through the wall, the shroud and stops bias open and the first duct is withdrawn towards the room whereby the shroud and stop engage and seal with an outside face of the wall and prevent the first duct from passing back though the wall. A second (internal) duct 9 is passed through the wall to slidably engage with the first duct and a tensioning device 6 is used to tension the first and second ducts together to the required thickness of the wall. A rubber sealing gland seals 8 the first duct with the wall. A disposable pull ring (15, fig 4) may be attached to the tensioning device to assist in pulling the first duct back into position, it is removed when installing the second duct, re-attached when tensioning the first and second ducts together and removed / discarded thereafter.

Description

IMPROVEMENTS TO VENTILATION DUCT INSTALLATION

Background to the invention

A well known problem when installing such systems as extraction vents, air conditioning vents, or boiler flues, is that access to the outside of the building is always required so that grilles, cowls, dampers and covers can be fixed. This does not pose a great problem when the installation is at ground floor level but due to new Health and Safety laws, it is no longer possible to carry out such external work above first floor level without the use scaffolding.

Even at first floor level, and before the statutory requirement to now use scaffolding, using heavy power tools while holding on to a ladder has always been a high risk operation. The use of scaffolding is expensive, it requires erection by specialist trained erectors and it therefor makes what was once a simple, if high risk installation, now very expensive and time consumng.

Summery of this invention This invention seeks to completely eliminate the need for access to the outside of a building allowing for all installation work to be carried out from inside of the building and therefore the need for scaffolding It relates to a system allowing venting and ducting installations to be installed completely from inside of a building.

The drawings are made on 9 sheets in which: Drawing Sheet I I Fig 1 shows an sectioned installed view of the components of this invention.

Sheet 2 / Fig 2 shows stage 1 of a typical installation.

Sheet 3 / Fig 3 shows stage 2 of a typical installation.

Sheet 4 / Fig 4 shows stage 3 of a typical installation.

Sheet 5 I Fig S shows stage 4 of a typical installation Sheet 6 / Fig 6 shows stage 5 of a typical installation Sheet 7 / Fig 7 shows stage 6 of a typical installation Sheet 8 / Fig 8 shows an enlarged view of the tensioning system.

Sheet 9 / Fig 9 shows an enlarged view of the Gland and Sprung Stop.

A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings. -_____________________________ The VENT / DUCT INSTALLATiON SYSTEM described in figures 1 to 9 is assembled and used as follows and describes only one typical application of the invention: NOTE: The Vertical Datum (19) is shown on each sheet of the drawings and X shows the top of the datum.

General description of the components of the invention The invention is comprised of the External Duct assembly, the Internal Duct assembly, and the Shutter Grille assembly.

The External Duct assembly has a Flexible Shroud (1) which is made from a rubber or thermoplastic rubber type material and which is attached to the External Duct (4). In the front of the External Duct (4) is mounted a Fixed Grille (5). In a number of equi-spaced positions around the circumference of the External Duct (4) are positioned suitable recesses (17) each retaining a sprung Stop (2) with the Springs (16) (Fig 9) biasing the Stops (2) in the direction of arrow "C". Also fixed to the External Duct (4) is a Sealing Gland (8) which is made from a rubber or thermoplastic rubber type material and which provides a seal between the External Duct (4) and the External Wall (3). Formed as part of the External Duct (4) are ribs, in the centre of which is a Boss (4/1) through which the Tensioning Rod(6) is passed. The Tensioning Rod (6) is sprung with a Spring (7). The Tensioning Rod (6) has a part plain shaft (611) and at it's other end has multiple concentric "D" forms (6/2).

The Internal Duct assembly is made up from the Internal Duct (9) which at one end is a sliding fit onto the External Duct (4) and at its other end is a fit into the core hole drilled into the Internal Wall (ii) and has a number of Fixing Lugs (9/i) around the circumference.

Formed as part of the Internal Duct (9) are ribs, in the centre of which is a Boss (9/2) through which the Tensioning Rod (6) is passed. Within the boss (9/2) is a Clip (10) (Fig 8) through which the multiple concentric "D "fonns (6/2) on the Tension Rod (6) which clip in the direction of arrow "A" on the Clip (10) and will not return in direction of arrow B. The Shutter Grille assembly is made up from the Grille Case (12) which is a sliding fit within the Internal Duct (9) and the Grille Vanes (13) which fit, and pivot in the direction of arrows "E" within the Grille Case (12).

Description of the installation and function of this invention A core hole of a diameter suitable to install the invention is drilled from the inside of the building. In the case of a cavity wall, through the internal wall (11) and the external wall (3) in the direction of arrow B as shown in Figs 1,2,3,4,5,6,and7; and in the case of a solid wall a core hole of a diameter suitable to install the invention is drilled from the inside of the building.

through the wall in the direction of arrow B which is not shown in the drawings. The External Duct assembly as shown in Figs 2,3,4 and 5 is passed through the Internal Wall (11) (Fig 2) and through the External Wall (3) (Fig 3&4) ) in the direction of arrow B. As the External Duct assembly is passed through the wall (11 and 3) the Flexible Shroud (1) and the sprung biased multiple Stops (2) are closed in the direction of arrows "D" (Fig 3) and as the External Duct assembly passes through the External Wall (3) the Flexible Shroud (1) and the sprung biased multiple Stops (2) open in the direction of arrows "C" (Fig 4). The Disposable Pull Ring (15) is attached to the end of the Tensioning Rod (6) (Fig 4) and the External Duct assembly is pulled back in the direction of arrow "A" (Fig 5) through the core hole by the Disposable Pull Ring (15) to the position where the Flexible Shroud (1) covers any edge break out around the core hole and seals against the External Wall (3) and the sprung biased multiple Stops (2) locate against the External Wall (3) and prevent the External Duct assembly from pulling back through the core hole. The Sealing Gland (8) seals between the External Duct (4) and the core hole in the External Wall (3) (Fig 5 and 9). The Internal Duct assembly is passed into the core hole in the Internal Wall (11) in the direction of arrow "B"and the Tensioning Rod (6) is passed through the boss (9/2) where the multiple concentric "D" forms (612) displace the Clip (10) (Fig8) which prevents the Tensioning Rod (6) returning through the boss (9/2) in the direction of arrow "B" The Disposable Pull Ring (15) (Fig 8) is reattached to the end of the Tensioning Rod(6) and pulled in the direction of arrow "A" while pushing the External Duct assembly in the direction of arrow "B" until the tension created between the Clip (10) and the spring loading from the Spring (7) holds the installation in place. The Internal Duct assembly is then screwed to the Internal Wall (11) by means of the Multiple Lugs (9/1). The Disposable Pull Ring (15) is removed and discard and the Tensioning Rod (6) can be cut off (6/3) (Fig 1) and the Shutter Grille assembly pushed into position (Fig 1 and 7) . The additional appliance (14) (either a boiler flu, ventilation ducting or similar) is then attached.

Claims

CLAIMS1 A Vent / Duct installation system which comprises an external duct to which a flexible shroud and sprung biased non-return stops are fitted which allow the external duct assembly to be passed through a suitable hole in a wall which closes the flexible shroud and sprung biased non-return stops flat to the external duct until it passes through the other side of the wall when the flexible shroud and sprung biased non-return stops open to their biased positions so that when the external duct is withdrawn back towards the wall the flexible shroud and sprung biased non-return stops seal and engage with the other side of the wall stopping the external duct from passing back through the wall; and which comprises also, an internal duct which engages with the external duct and fixes to the inside of the wall and also a means of tensioning the external and internal duct together to the thickness of the wall.
2 A Vent / Duct installation system as claimed in claim 1 which has a means of retaining various designs of grilles and cowls at the flexible shroud end of the external duct and a means of sealing between the external duct and the hole in the wall, through which the external and internal duct passes.
3 A Vent / Duct installation system as claimed in claims 1 and 2 and which accepts a non-return Shutter Grille assembly within the internal duct.
4 In combination a Vent / Duct installation system as claimed in any preceding claim.A Vent / Duct installation system substantially as hereinbefore described with reference to Figs. 1 to 9 of the accompanying drawings. ----_____________