Rear-positioned filter mount for use with a box or cage fan for reducing dust emission and improving interior air quality

Abstract

A fan assembly including a pedestal supported and upwardly extending body. A control adjustable electric motor is secured to an upper end of the body. A fan subassembly includes a peripheral and depth defining shroud communicating a rear grate with a front grate. A plurality of rotatable fan blades are operated by the motor and extend from a hub rotatably supported within the shroud between the front and rear grates such that a rear induced vacuum results from rotation of the fan blades. A filter and associated bracketry secures the filter in communication with the rear grate in order to filter contaminants attracted via the induced vacuum forces to the rear of the fan during operation.

1 . A fan assembly, comprising:
 a pedestal supported and upwardly extending body;   a control adjustable electric motor secured to an upper end of said body;   a fan subassembly supported atop said motor housing and including a peripheral and depth defining shroud communicating a rear grate with a front grate;   a plurality of rotatable fan blades being operated by said motor and extending from a hub rotatably supported within said shroud between said front and rear grates such that a rear induced vacuum results from rotation of said fan blades; and   a filter and associated bracketry for securing said filter in communication with said rear grate in order to filter contaminants attracted via the induced vacuum forces to said rear of the fan during operation.   
   
   
       2 . The fan as described in  claim 1 , said body further comprising first and second elongate and telescoping members. 
   
   
       3 . The fan as described in  claim 2 , a coupling positioned between said telescoping members to adjust an overall length established therebetween. 
   
   
       4 . The fan as described in  claim 1 , a power cord extending to said motor housing. 
   
   
       5 . The fan as described in  claim 1 , said shroud further comprising a generally polygonal cross sectional shape, with said front grate further comprising a plurality of individual and substantially pie-shaped grid portions extending in a substantially planar fashion from an inwardly sloping edge of said shroud. 
   
   
       6 . The fan as described in  claim 1 , said filter further comprising a generally circular shape incorporating at least one of a honeycomb or waffle-like pattern. 
   
   
       7 . The fan as described in  claim 6 , further comprising a lower semi-circular shaped frame seating portion secured to said rear grate for receiving in seating fashion an outer perimeter of said filter. 
   
   
       8 . The fan as described in  claim 5 , further comprising a plurality of peripheral defined hooks for supporting said filter to said rear grate. 
   
   
       9 . The fan as described in  claim 1 , further comprising heat dissipating vents associated with a surface of a housing containing the control adjustable electric motor. 
   
   
       10 . The fan as described in  claim 2 , further comprising a rotatable coupling configured at a lower interface between said electric motor and said upper end of said telescoping body. 
   
   
       11 . The fan as described in  claim 10 , further comprising said coupling capable of pivoting said shroud and supported fan blades as well as rotating to any desired degree. 
   
   
       12 . The fan as described in  claim 11 , further comprising said fan controls facilitating rotation of said fan. 
   
   
       13 . The fan as described in  claim 1 , further comprising a shaft extending upwardly from said electric motor within the interior of said shroud and engaging a gear secured to an end of a brace in turn supported upon a rear surface of said shroud. 
   
   
       14 . The fan as described in  claim 1 , further comprising a divider incorporated into said shroud for permitting opening and closing of said shroud. 
   
   
       15 . The fan as described in  claim 1 , said shroud further comprising first and second separable halves supported by hinges. 
   
   
       16 . A fan assembly, comprising.
 a pedestal supported and upwardly extending body, said body further comprising first and second elongate and telescoping members separated by a length adjustable coupling;   a control adjustable electric motor secured to an upper end of said body within a housing;   a fan subassembly supported atop said motor housing and including a peripheral and depth defining shroud communicating a rear grate with a forwardly spaced front grate;   a plurality of rotatable fan blades being operated by said motor and extending from a hub rotatably supported within said shroud between said front and rear grates such that a rear induced vacuum results from rotation of said fan blades; and   a filter and associated bracketry for securing said filter in communication with said rear grate in order to filter contaminants attracted via the induced vacuum forces to said rear of the fan during operation.   
   
   
       17 . The fan as described in  claim 16 , said filter further comprising a generally circular shape incorporating at least one of a honeycomb or waffle-like pattern. 
   
   
       18 . The fan as described in  claim 17 , further comprising a lower semi-circular shaped frame seating portion secured to said rear grate for receiving in seating fashion an outer perimeter of said filter. 
   
   
       19 . The fan as described in  claim 16 , further comprising a plurality of peripheral defined hooks for supporting said filter to said rear grate. 
   
   
       20 . The fan as described in  claim 16 , further comprising a shaft extending upwardly from said electric motor with the interior of said shroud and engaging a gear secured to an end of a brace in turn supported upon a rear surface of said shroud.