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US 4,092,136 AGranted
Air filtering system
AssigneesWilliam D. Farnham, Teddar S. Brooks
InventorDominic J. Zimbardi
Life of this patent
Estimating the term…
Abstract
An air filtering system includes a motor driven exhaust fan operable to draw air through a filter for particulate spray material, support means for supporting a dispenser adapted under operator control to dispense particulate spray material into the air and means responsive to operator removal and return of the dispenser to the support means for energizing and deenergizing the motor, respectively.
Claims2
An air filtering system for removing particulate material from the air, which comprises in combination:
- support means for removably and separately supporting a pair of spray devices adapted under operator control to dispense said particulate material into said air, one of said spray devices being an aerosol can type dispenser and another of said spray devices being a spray gun, said support means including a casing defining an upwardly opening recess sized to receive said dispenser;
- a filter for filtering said particulate material from said air when drawn therethrough;
- a fan means for drawing air containing said particulate material through said filter;
- an electric motor means for operating said fan means;
- and
- electrical circuit means for controlling operation of said motor means, said electrical circuit means including sensing means responsive to operator removal and return of said spray devices to said support means for energizing and deenergizing said motor means, respectively, said sensing means being operable to energize said motor means when either of said spray devices is removed from said support means by said operator, and said sensing means includes a pair of electrical switches supported within said casing and a pair of levers operatively associated one with each of said switches and supported for pivotal movement by said casing, a first of said levers having a portion thereof extending into said recess for engagement by said dispenser when received therewithin and a second of said levers having a portion thereof extending through a side wall of said casing and defining a supporting hook for engagement by said spray gun, said switches being normally closed switches forced to assume a circuit open condition by their associated levers upon engagement of said levers by said spray devices.
3 more elements
An air filtering system for removing particulate material from the air, which comprises in combination:
- support means for removably and separately supporting a pair of spray devices adapted under operator control to dispense said particulate material into said air, one of said spray devices being an aerosol can type dispenser and another of said spray devices being a spray gun, said support means including a casing defining an upwardly opening recess sized to receive said dispenser;
- a filter for filtering said particulate material from said air when drawn therethrough;
- a fan means for drawing air containing said particulate material through said filter;
- an electric motor means for operating said fan means;
- a floor standard mounted casing for housing said filter, said fan means and said motor means, the last said casing being open ended and of generally rectangular cross-section, said last said casing hingedly mounting adjacent one end thereof a cover plate movable between open and closed positions and an exhaust air diffusion device adjacent an opposite end thereof, said cover plate being formed with an air inlet opening and cooperating with a rim portion of said one end to removably peripherally clamp said filter therebetween;
- and
- electrical circuit means for controlling operation of said motor means, said electrical circuit means including sensing means responsive to operator removal and return of said spray devices to said support means for energizing and deenergizing said motor means, respectively, said sensing means being operable to energize said motor means when either of said spray devices is removed from said support means by said operator and said sensing means includes a pair of electrical switches supported within said casing of said support means and a pair of levers operatively associated one with each of said switches and supported for pivotal movement by said casing of said support means, a first of said levers having a portion thereof extending into said recess for engagement by said dispenser when received therewithin and a second of said levers having a portion thereof extending through a side wall of said casing of said support means and defining a supporting hook for engagement by said spray gun, said switches being normally closed switches forced to assume a circuit open condition by their associated levers upon engagement of said levers by said spray devices.
4 more elements
Dependencies are inferred from the claim text.