Patent AU-2021250876-A1 (AU)
Title: The Portable Ventilation Fan – Blower Wet Back Stop Invention
Inventor: NORTON MATHEW
IPC: B28D7/02
Filed: 2021-10-12
Abstract: The Portable Ventilation Fan - Blower Wet 
Back Stop Invention 
5 
Abstract 
This invention, the Dust Ventilation Fan - Blower Wet 
Back stop Invention, specifically relates to a new modified, repurposed, 
10 Portable, Ventilation Dust Fan - invention and design, that incorporates 
all known design features as currently used on popular, widely sold, 
hand Portable, Axial Type Ventilation Fans, but consists of 2 new 
designs able to be attached too and used with the wet back stop invention 
previously patented No 2021103585, that uses a smaller 100mm duct 
15 attachment architecture to operate a water spray feature, created by the 
push or pull of air into the vessel, the first Dust Ventilation Fan design 
relates to a trolley mounted apparatus, that has a co-adjoined, axial 
ventilation fan at the front air intake section of a centrifugal ventilation 
fan design, designed for the dual purpose of providing a powerful large 
20 dust fume receptacle at the front of the apparatus, via an extendable, 
hood attachment feature, but uses a centrifugal ventilation fan design to 
provide the attachment architecture to the back stop vessel and additional 
air push means to feed and operate the wet back stop apparatus, this new 
invention also relates to a new secondary Portable Dust Ventilation Fan 
25 design whereby, that has a reducer duct system design, at the rear of the 
apparatus - most commonly of 120mm - 150mm size, for hose 
attachment to air intake section to an off the shelf; centrifugal fan 
product range, serves the same purpose as described in the first Dust 
Ventilation Fan design invention, both new designs serve, a similar but 
30 vital technical need and that is to provide greater air pressure and push 
air into a wet stop apparatus, that also provides for a more dynamic water 
spray action inside the wet back stop vessel, for improved dust 
suppression, Both new axial, centrifugal fan combination designs can
contain a new extended front end cylindrical section to the axial fan 
35 section of the apparatus,, whereby the motor and safety grate is recessed 
further back inside the cylindrical housing ofthe ventilation fan, for the 
purpose of creating a cutting work space inside the apparatus, whereby 
small angle grinders, can be used for cutting tile and stone and direct the 
dust directly into the fume, or alternatively the front end design can 
40 contain identical design features, as is currently used at the rear of 
portable axial ventilators, whereby a flexible sausage duct system, can 
instead be attached to the front section of the axial fan via use of the 
same cylinder housing edge design, and strap - nylon slide bar grip 
attachment used at the rear of commonly sold portable ventilator fans, 
45 that facilitates the attachment of various fume extension devices, in 
particular a fume collector design of identical duplicate design as the 
cylindrical fume housing design itself; but without an internal motor 
attached, that eliminates the problem of air turbulence created by the 
close proximity of the fans to the frontend of the fume, that provides a 
50 safer, more legally compliant engineered dust management solution for 
cutting, stone, tile, bricks, and silica material.  
(Name of applicant) Date 
55 (MATHEW RAYMUND NORTON) 12 Oct 2021 
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