Rollably positioned, adjustably directable clean air delivery supply assembly, for use in weather protected environments to provide localized clean air, where activities require clean air quality per strict specifications

A rollably positioned, passable through doorways, adjustably directed clean air supply assembly, for use in weather controlled environments to direct clean air through a designated volume of air, where an activity is being undertaken, which requires very clean air per strict specifications, comprising:

• a. lower hollow housing having in turn:
• i. a center vertical section of this lower hollow housing;
• and
• ii. a rear vertical section of this lower hollow housing, which is
• iii. secured to the center vertical section, to provide a positively air sealed interior receiving volume plenum structure for an interior powered air moving assembly and to provide air flow passageways for incoming air to enter this lower hollow housing and to enter the intake of a interior powered air moving assembly, and for air to leave an interior powered air moving assembly and to leave this lower hollow housing;
• b. a charcoal pre-filter assembly secured outside to the front of the front vertical section of the lower hollow housing comprising, in turn:
• i. a filter door housing, with intake louvers;
• ii. a charcoal pre-filter fitted within the filter door housing;
• ii. a filter retainer holding the charcoal pre-filter within the filter door housing;
• and a
• iii. baffle positioned on the front vertical section of the lower hollow housing to redirect air leaving the charcoal pre-filter around this baffle before entering the air flow passageway in the lower hollow housing and continuing on to an intake of an interior powered air moving assembly, whereby the use of the baffle serves to deflect the sound level of an interior powered air moving assembly, and also serves to avoid the channeling of the incoming air through only the central area of the charcoal pre-filter;
• c. an interior powered air moving assembly secured inside to the rear vertical section of the lower hollow housing, comprising, in turn:
• i. a mounting structure of the rear vertical section;
• ii. an electric motor shaft secured to this mounting structure;
• iii. an armature secured to this electric motor shaft;
• iv. a backward inclined impeller rotatably positioned about electric motor shaft;
• v. an electrical field secured to this impeller to complete an electrical motor which is thereby positioned inside the backward inclined impeller, and secured to the mounting structure, whereby the backward inclined impeller rotates it to draw air in axially and to discharge air radially;
• d. horizontal extending legs secured to the lower hollow housing at the bottom thereof;
• e. casters secured to and depending from the legs at the ends thereof;
• f. a tower hollow housing having in turn:
• i. a front vertical section of this tower hollow housing;
• and
• ii. a rear vertical section of this tower hollow housing, which is secured to the top vertical section, and the secured vertical sections provide an interior receiving volume structure which serves as an air flow passageway;
• and whereas this tower hollow housing receives, in part, a vertically positioned telescoping structural tube plenum, positions a power assembly used in raising and lowering the telescoping structural tube plenum, and positions a control assembly;
• g. a power assembly in the tower hollow housing, used in raising and lowering a telescoping structural tube plenum, and thereby raising and lowering a top filter head assembly, having in turn:
• i. an electrical motor;
• ii. a lead screw powered by the electrical motor, and
• iii. a guide block movable on the lead screw and adapted to contact and to move a telescoping structural tube plenum;
• h. a control assembly in the tower hollow housing, used in controlling the operation of the electrical motor of the interior powered air moving assembly, and in controlling the operation of the electrical motor of the power assembly used in raising and lowering a telescoping structural tube plenum assembly;
• i. a telescoping structural tube plenum assembly movably receivable, in part, in the tower hollow housing for vertical movement by the power assembly upon operations of the control assembly;
• a tilt adjustment assembly secured in part to the structural tube assembly, comprising in turn:
• i. spaced vertical support arms, having holes, secured to the telescoping structural tube plenum assembly;
• ii. a bolt serving as s shaft to be extended through the holes of spaced vertical support arms;
• iii. a pivot bracket for rotation about the bolt serving as a shaft;
• iv. at least one positioning assembly for moving and holding the pivot bracket to selected angular positions, comprising, in turn, spaced fiber friction plates arranged along the bolt serving as a shaft;
• spaced steel friction plates located in the spaces between the spaced fiber friction plates and also arranged along the bolt serving as a shaft, with the steel friction plates interfitting with the pivot bracket to rotate with it;
• a torsion spring having both a coil portion thereof fitted about the bolt, serving as a shaft, and an extending arm for movably contacting all the steel friction plates to restrain them as a group, when this group is frictionally opposing rotary movement of the pivot bracket;
• a bushing both for positioning about the bolt, serving as a shaft, for receiving, the spaced fiber friction spaced plates and steel friction plates;
• a mandrel for positioning about the bolt, serving as a shaft, and fitting into the coil portion of the torsion spring;
• belleville washers serving as conical spring washers fitted about the bushing fitted about the bolt, serving as a shaft, and positioned at the respective sides of the overall grouping of the spaced fiber friction plates and the spaced steel friction plates;
• compression washers for placement over the bolt, serving as a shaft, and one of them is located between the pivot bracket and one of the spaced support arms, and the other is located between the belleville washer, and one of the spaced steel friction plates;
• a compression cap for placement over the bolt, serving as a shaft, and located adjacent to one of the belleville washers;
• a washer for placement over the bolt, serving as a shaft, and located adjacent to the compression cap;
• a self locking torsion adjustment nut for placement over the bolt, serving as a shaft, and located adjacent the washer to hold together this tilt adjustment assembly, when the assembly thereof about the bolt, serving as a shaft, has been completed, whereby the pivot bracket is controllably adjusted from a vertical position, through selectable angular positions, to a horizontal position;
• j. a self sealing bellows for fitting over the tilt adjustment assembly, and secured at the lower end thereof to the telescoping structural tube plenum assembly at the top thereof, and arranged for securement at the top thereof to a top filter head assembly, to thereby direct the pre-filtered air through the interior of this bellows, when this air is flowing between the respective filters;
• and
• k. a self sealing bellows for fitting over the tilt adjustment assembly, and secured at the lower end thereof to the telescoping structural tube plenum assembly at the top thereof, and arranged for securement at the top thereof to a top filter head assembly, to thereby direct the pre-filtered air through the interior of this bellows, when this air is flowing between the respective filters;
• and
• l. a top filter hood assembly, tiltably secured to the telescoping structural tube plenum assembly, by utilizing the tilt adjustment assembly, and this top filter head assembly comprises:
• a hood top contoured to receive the pre-filtered air arriving through the bellows and equally distribute this air throughout the hood top, and then directing this final filtered air in a ninety degree direction;
• a gasketed high efficiency particle arrestor filter fitted partially into the hood top to receive, to filter, and to pass on the final-filtered air;
• a grill fitted adjacent the high efficiency particle arrestor filter, serving to hold and to protect this filter, and to further disperse the flow of the filtered air;
• a hood bezel fitted about the grill, and the high efficiency particle arrestor filter, and secured to the hood top, and the bellows at the top thereof is secured to this top filter head assembly.