US20050159101A1 - Pivotal direct drive motor for exhaust assembly - Google Patents
Pivotal direct drive motor for exhaust assembly Download PDFInfo
- Publication number
- US20050159101A1 US20050159101A1 US10/924,532 US92453204A US2005159101A1 US 20050159101 A1 US20050159101 A1 US 20050159101A1 US 92453204 A US92453204 A US 92453204A US 2005159101 A1 US2005159101 A1 US 2005159101A1
- Authority
- US
- United States
- Prior art keywords
- recited
- wall
- exhaust assembly
- exhaust
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/02—Roof ventilation
- F24F7/025—Roof ventilation with forced air circulation by means of a built-in ventilator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
Definitions
- the present invention relates generally to exhaust fans, and more particularly to exhaust fans of the type that draw contaminated air from one or more fume hoods dispersed throughout a building, mix the contaminated air with ambient air to dilute the contaminants, and vent the diluted air from the building into the ambient environment.
- an exhaust assembly including an outer wall that defines a cavity therein having an air inlet formed at its bottom end, and an inner wall fastened to the outer wall and positioned in the cavity to divide it into a centrally located chamber and a surrounding annular space.
- a fan chamber is disposed at the bottom of the cavity and retains a fan coupled to a fan shaft to draw exhaust air in through the air inlet and blow it upward through the annular space.
- a drive chamber is disposed inside the outer wall and adjacent the fan chamber.
- a motor is pivotally mounted in the drive chamber. The motor is pivotable between a first engaged position in which a motor shaft is coupled to the fan shaft for driving the fan, and a second disengaged pivoted position.
- an exhaust assembly is mounted onto a roof of a building for removing contaminated air from one or more building exhaust vents.
- the exhaust assembly includes an air inlet receiving the contaminated air, at least one ambient air entrainment zone mixing ambient air with the contaminated air to produce diluted air, and an air outlet exhausting the diluted air.
- a fan is coupled to a fan shaft to draw the contaminated air through the air inlet and blow it towards the air outlet.
- a pivotally mounted motor drives a motor shaft that is removably coupled to the fan shaft.
- an exhaust assembly includes a housing separating a drive chamber from a fan chamber.
- a motor is pivotally mounted in the drive chamber, and includes a motor shaft.
- the housing defines an inlet end and an outlet end.
- a fan is disposed in the fan chamber and coupled to a fan shaft that is, in turn, coupled to the motor shaft to draw air through the air inlet and blow it towards the outlet.
- At least one passageway extends through the housing. The passageway provides access to the motor.
- FIG. 1 is a schematic perspective view of a building ventilation system constructed in accordance with principles of the present invention
- FIG. 2 is a side elevation view of an exhaust assembly constructed in accordance with the preferred embodiment
- FIG. 3 is a perspective view with parts cut away of the plenum which forms part of the exhaust assembly of FIG. 2 ;
- FIG. 4 is a perspective view of a housing which forms part of the plenum of FIG. 3 ;
- FIGS. 5A-5E are views of the plenum which forms part of the exhaust assembly of FIG. 2 ;
- FIGS. 6A-6B are exploded views of the plenum of FIGS. 5A-5E showing the dampers therein.
- FIG. 7 is a sectional side elevation view of the exhaust assembly illustrated in FIG. 2 ;
- FIG. 8 is an exploded perspective view of the fan assembly of FIG. 7 ;
- FIG. 9 is an enlarged sectional side elevation view similar to FIG. 7 but illustrating the fan motor in a pivoted position
- FIG. 10 is a partial view of the fan assembly of FIG. 7 with parts cut away;
- FIG. 11 is a view in cross-section taken along the plane 11 - 11 shown in FIG. 7 ;
- FIG. 12 is a view in cross-section taken along the plane 12 - 12 shown in FIG. 7 ;
- FIG. 13 is a view in cross-section taken along the plane 13 - 13 shown in FIG. 7 ;
- FIG. 14 is a view in cross-section taken along the plane 14 - 15 shown in FIG. 7 ;
- FIG. 15 is a schematic diagram of the fan assembly showing the parameters which determine the desired performance
- FIG. 16 is a pictorial view with parts cut away of a second embodiment of the exhaust assembly of the present invention.
- FIG. 17 is an elevation view of the exhaust assembly of FIG. 16 .
- a building ventilation system 20 includes one or more fume hoods 22 of the type commonly installed in commercial kitchens, laboratories, manufacturing facilities, or other appropriate locations throughout a building that create noxious or other gasses that are to be vented from the building.
- each fume hood 22 defines a chamber 28 that is open at a front of the hood for receiving surrounding air.
- the upper end of chamber 28 is linked to the lower end of a conduit 32 that extends upwards from the hood 22 to a manifold 34 .
- Manifold 34 is further connected to a riser 38 that extends upwards to a roof 40 or other upper surface of the building.
- the upper end of riser 38 is, in turn, connected to an exhaust assembly 42 that is mounted on top of roof 40 and extends upwards away from the roof for venting gasses from the building.
- exhaust assembly 42 includes a plenum 44 disposed at the base of the assembly that receives exhaust from riser 38 and mixes it with fresh air.
- a fan assembly 46 is connected to, and extends upwards from, plenum 44 .
- Fan assembly 46 includes a fan wheel that draws exhaust upward through the plenum 44 and blows it out through a windband 52 disposed at its upper end.
- exhaust assembly 42 draws an airflow that travels from each connected fume hood 22 , through chamber 28 , conduits 32 , manifold 34 , riser 38 and plenum 44 . This exhaust air is mixed with fresh air before being expelled upward at high velocity through an opening in the top of the windband 52 .
- a conventional damper 36 is disposed in conduit 32 at a location slightly above each hood 22 , and is automatically actuated between a fully open orientation (as illustrated) and a fully closed orientation to control exhaust flow through the chamber 28 . Hence, the volume of air that is vented through each hood 22 is controlled.
- the building can be equipped with more than one exhaust assembly 42 , each such assembly 42 being operably coupled either to a separate group of fume hoods 22 or to manifold 34 . Accordingly, each exhaust assembly 42 can be responsible for venting noxious gasses from a particular zone within the building 26 , or a plurality of exhaust assemblies 42 can operate in tandem off the same manifold 34 .
- the manifold 34 may be coupled to a general room exhaust in building 26 .
- An electronic control system (not shown) may be used to automatically control the operation of the system.
- plenum 44 includes a rectangular housing having a horizontal upper wall 54 that includes an exhaust outlet 92 from the plenum 44 , and an opposing lower wall 56 that includes an exhaust inlet 64 .
- a pair of opposing vertical side walls 58 and an integrally connected vertical rear wall 60 extend between the upper and lower walls 54 and 56 to define an internal mixing chamber 59 .
- Plenum 44 further includes a vertical front wall 62 disposed opposite the rear wall 60 .
- a hood 66 extends outwardly from front wall 62 to provide a bypass air inlet extending through an opening 82 extending through wall 62 , and into chamber 59 .
- the hood 66 includes opposing vertical side walls 68 , a horizontal lower wall 72 , and an opposing angled upper wall 70 that together define a front opening that can be covered by a front porous screen 74 that enables ambient (bypass) air to flow through and into plenum 44 .
- Upper wall 70 is angled down from the upper end of the plenum front wall 62 , and extends out a distance beyond lower hood wall 27 to provide a rain hood that protects the interior plenum components from entrainment of snow, water, and debris.
- An upward-turned lip 79 that surrounds the outer periphery of upper wall 70 prevents water from spilling into the bypass air stream.
- a damper 84 is mounted in an opening 82 formed in the plenum front wall 62 and beneath the hood 70 .
- Damper 84 includes damper blades 86 that are controlled to regulate the flow rate of fresh air into plenum 44 . This flow of fresh air is indicated by Arrow B in FIG. 3 .
- Damper 84 can be controlled electronically to enable a flow of bypass air into plenum 44 , which ensures that the total air flow through the fan assembly 46 remains constant despite fluctuations in the flow rate of exhaust air to be removed from the building via exhaust assembly 42 .
- a support bracket 88 extends horizontally across the inner surfaces of walls 58 , 60 , and 62 at the upper end of chamber 59 , and collectively support an isolation damper 90 that isolates the outdoor ambient air entering through the fan assembly 46 when the fan is not in operation. As shown best in FIGS. 6A and 6B the isolation damper 90 is slidably attached to the plenum 44 .
- the damper 90 may be activated by gravity backdraft or it may be activated by a shaft as well known by a skilled artisan.
- the riser 38 ( FIG. 1 ) may be extended above the roof 40 and connected to an inlet opening formed in a side wall 58 of the plenum 44 .
- a gutter is formed around the interior base perimeter of the plenum chamber 59 to collect and drain liquid.
- the gutter is formed by a flange 89 that extends inward from walls 58 , 60 , and 62 at the lower end of chamber 59 , and a lip 91 that extends up from the inner edge of flange 89 .
- Gutter is linked to a drain 95 extending through side wall 58 to provide for the transport of condensate that forms in chamber 59 .
- all four side walls of the plenum 44 are constructed with identical panels 61 that can be selectively removed to orient the plenum 44 in any desired direction.
- a panel 61 is removed, a large opening is formed in the plenum wall.
- a panel 61 is removed on one wall to form the front wall 62 to which hood 66 is attached.
- the panels 61 and hole patterns are the same on all four sides of the plenum 44 , which enables complete freedom to place the hood 66 in the desired orientation.
- the removable panels 61 on the sides of the plenum 44 also enable multiple plenums 44 to be combined with a single riser 38 .
- the plenums 44 are mounted adjacent one another and the panels 61 in their abutting walls are removed to form a single, enlarged chamber 63 . Any number of plenums 44 may be combined in this manner with complete flexibility in their orientation.
- the location of their hoods 66 is provided by the same removable panels 61 and mounting holes on all four walls of the plenum 44 in the manner described above.
- the removable panels 61 also enable access to the interior of the plenum 44 from any direction. This enables routine maintenance and repairs to be made without having to remove the entire exhaust assembly 42 from the riser 38 or the fan assembly 46 from the plenum 44 .
- fan assembly 46 sits on top of the plenum 44 and includes a cylindrical outer wall 100 that is welded to a rectangular base plate 102 .
- a set of eight gussets 104 is welded around the lower end of the outer wall 100 to help support it in an upright position.
- Supported inside the outer wall 100 is a cylindrical shaped inner wall 106 which divides the chamber formed by the outer wall 100 into three parts: a central drive chamber 108 , a surrounding annular space 110 located between the inner and outer walls 106 and 100 , and a fan chamber 112 located beneath drive chamber 108 .
- a fan shaft 114 is disposed in drive chamber 108 and is rotatably fastened by a bearing 118 to a bottom plate 116 that is welded to the bottom end of inner wall 106 .
- Fan shaft 114 extends down into the fan chamber 112 to support a fan wheel 120 at its lower end, and extends up into drive chamber 108 where it is connected to a motor shaft 152 via a conventional coupling 122 .
- Motor shaft 152 extends through a horizontal plate 124 that extends across the interior of the drive chamber 108 and is supported from below by a set of gussets 126 spaced around the interior of the drive chamber 108 .
- fan wheel 120 includes a dish-shaped wheelback 130 having a set of main fan blades 132 fastened to its lower surface that support a frustum-shaped rim 136 that extends around the perimeter of the fan blades. The lower edge of this rim 136 fits around a circular-shaped upper lip of an inlet cone 138 that fastens to, and extends upward from the base plate 102 .
- the fan wheel 120 is a mixed flow fan wheel such as that sold commercially by Greenheck Fan Corporation under the trademark MODEL QEI and described in pending U.S. patent application Ser. No. 10/297,450 which is incorporated herein by reference.
- exhaust air from the plenum 44 is drawn upward through the air inlet formed by the inlet cone 138 and blown radially outward and upward into the annular space 110 as shown by arrows 140 ( FIG. 11 ).
- Wheelback 130 can also include, if desired, a set of auxiliary fan blades 134 fastened to its upper surface that produce a radially outward directed air flow. Because shaft 114 and lower bearing 118 should provide a good seal with the bottom plate 116 , no source of air should be available and this air flow is not well defined. However, if a leak should occur, an air flow pattern is established in which air is drawn from the drive chamber 108 and directed radially outward through a gap formed between the upper rim of the fan wheel 130 and the bottom plate 116 . As a result, exhaust air cannot escape into the drive chamber 108 even if a leak should occur.
- each passageway is formed by aligned elongated openings formed through the outer wall 100 and inner wall 106 which are connected by a passage wall 144 .
- the passage wall 144 encircles the passageway and isolates it from the annular space 110 through which it extends.
- FIG. 11 one can look through either of the passageways and see a fan drive motor 150 and its associated components, fan shaft 114 , and coupling 122 . Maintenance personnel thus have easy access to these elements for inspection and repair.
- fan drive motor 150 is located in drive chamber 108 and is mounted to horizontal support plate 124 .
- motor 150 is affixed to the upper surface of a mounting bracket 154 , which is fastened to the upper surface of plate 124 via bolts 156 or like fasteners in order to provide structural integrity during operation.
- Mounting bracket 154 includes a flat horizontally extending rectangular plate 160 and a pair of strengthening flanges 168 extending up from opposing outer ends of the plate. Flanges 168 extend in a direction substantially parallel to an axis extending perpendicular between the passageways.
- Motor shaft 152 extends down through mounting bracket 154 , and is connected directly to the fan shaft 114 via coupling 122 such that motor rotatably drives fan wheel 120 during operation.
- bolts 156 can be removed, and coupling 122 can be loosened such that motor shaft 152 becomes disengaged from fan shaft 114 .
- Motor 150 can be manually pivoted about hinge 158 at any angle between 0° and 180° (with respect to bracket 154 and plate 124 ) to provide the needed access to the components inside chamber 18 .
- motor 150 pivots at an angle of about 90° such that the vertical surfaces of flanges 168 proximal hinge 158 provide a stop with respect to motor 150 pivoting beyond 90°.
- the vertical flange surfaces could be positioned to provide additional clearance with respect to plate 124 , thereby allowing the motor to pivot beyond 90°.
- a stop in the form of flange 145 could extend from wall 144 ( FIG. 9 ) and protrude a desired distance to engage upper surface of bracket once motor 150 has pivoted to the desired angle.
- a portion of motor 150 can extend through one of the passageways while access to components inside drive chamber 108 can be achieved via the other passageway.
- hinge 158 can be disassembled in the usual manner (e.g., by removing the hinge pin) in order to facilitate removal of motor 150 from assembly 42 .
- the exhaust air moves up through the annular space 110 and exits through an annular-shaped nozzle 162 formed at the upper ends of walls 100 and 106 as indicated by arrows 164 .
- the nozzle 162 is formed by flaring the upper end 166 of inner wall 106 such that the cross-sectional area of the nozzle 162 is substantially less than the cross-sectional area of the annular space 110 .
- exhaust gas velocity is significantly increased as it exits through the nozzle 162 .
- vanes 170 are mounted in the annular space 110 around its circumference to straighten the path of the exhaust air as it leaves the fan and travels upward. The action of vanes 170 has been found to increase the entrainment of ambient air into the exhaust as will be described further below.
- a windband 52 is mounted on the top of fan assembly 46 and around nozzle 162 .
- a set of brackets 54 is attached around the perimeter of the outer wall 100 . Brackets 54 extend upward and radially outward from the top rim of outer wall 100 , and fasten to the windband 52 .
- Windband 52 is essentially frustum-shaped with a large circular bottom opening coaxially aligned with the annular nozzle 162 about a central axis 56 .
- the bottom end of the windband 52 is flared by an inlet bell 58 and the bottom rim of the inlet bell 58 is aligned substantially coplanar with the rim of the nozzle 162 .
- the top end of the windband 52 is terminated by a circular cylindrical ring section 60 that defines the exhaust outlet of the exhaust assembly 42 .
- the windband 52 is dimensioned and positioned relative to the nozzle 162 to entrain a maximum amount of ambient air into the exhaust air exiting the nozzle 162 .
- the ambient air enters through an annular gap formed between the nozzle 162 and the inlet bell 58 as indicated by arrows 62 . It mixes with the swirling, high velocity exhaust exiting through nozzle 162 , and the mixture is expelled through the exhaust outlet at the top of the windband 52 .
- the flared inlet bell 58 at the bottom of the windband 52 has been found to increase ambient air entrainment by several percent. This improvement in air entrainment is relatively insensitive to the angle of the flare and to the size of the inlet bell 58 .
- Another feature which significantly improves fan system operation is the shape of the nozzle 162 . It is common practice in this art to shape the nozzle such that the exhaust is directed radially inward to “focus” along the central axis 56 . This can be achieved by tapering the outer wall radially inward or by tapering both the inner and outer walls radially inward to direct the exhaust towards the central axis 56 . It is a discovery of the present invention that ambient air entrainment can be increased and pressure losses decreased by shaping the nozzle 162 such that exhaust air is directed radially outward rather than radially inward towards the central axis 56 . In the preferred embodiment this is achieved by flaring the top end 166 of the inner wall 106 .
- Air entrainment is increased by several percent and pressure loss can be reduced up to 30% with this structure. It is believed the increase in air entrainment is due to the larger nozzle perimeter that results from not tapering the outer wall 100 radially inward. It is believed that the reduced pressure loss is due to the fact that most of the upward exhaust flow through the annular space 110 is near the outer wall 100 and that by keeping this outer wall 100 straight, less exhaust air is diverted, or changed in direction by the nozzle 162 .
- ambient air is also drawn in through the passageways and mixed with the exhaust air as indicated by arrows 170 .
- This ambient air flows out the open top of the flared inner wall 100 and mixes with the exhaust emanating from the surrounding nozzle 162 .
- the ambient air is thus mixed from the inside of the exhaust.
- a sloped roof 172 is formed above the top end of the fan shaft 114 .
- the roof 172 seals off the drive chamber 108 from the open top end of the inner wall 106 , and it is sloped such that rain will drain out the passageways.
- the slope of roof 172 also provides additional clearance to enable unobstructed pivoting of motor 150 .
- roof 172 can be eliminated to more easily facilitate the removal of motor 150 from assembly 42 , which can be easily achieved by lifting motor 150 up through windband 52 .
- the structure of the exhaust assembly lends itself to customization to meet the specific needs of users.
- user specifications include volume of exhaust air, plume height, amount of dilution with ambient air, and assembly height above roof top.
- User objectives include minimizing cost.
- Such customization is achieved by selecting the size, or horsepower, of the fan motor 150 , and by changing the four system parameters illustrated in FIG. 15 .
- Table 1 illustrates how windband length changes the amount of entrained ambient air in the exhaust and Table 2 illustrates how windband exit diameter changes the amount of ambient air entrainment.
- Table 2 illustrates how windband exit diameter changes the amount of ambient air entrainment.
- Table 3 illustrates how the amount of entrained ambient and changes as a finction of nozzle exit area and Table 4 illustrates the relationship between the amount of entrained ambient air and windband entry area.
- an alternative embodiment of the invention is substantially the same as the preferred embodiment described above except the nozzle end of the fan assembly 46 is modified to add an additional, second nozzle assembly 50 .
- the outer wall 100 of the fan assembly is tapered radially inward at its upper end to form a first nozzle 53 with the inner wall 106 which extends straight upward, beyond the nozzle 53 .
- the second nozzle assembly 50 is a frustum-shaped element which is fastened to the extended portion of the inner wall 106 by brackets 55 . It is flared around its bottom end to form an inlet bell 57 similar to that on the windband 52 .
- the second nozzle assembly 50 is concentric about the inner wall 106 , and its top end is coplanar with the top end of the inner wall 106 to form an annular-shaped second nozzle 59 therebetween.
- Brackets 61 fasten around the perimeter of the second nozzle assembly 50 and extend upward and radially outward to support the windband 52 .
- the windband 52 is also aligned coaxial with the inner wall 106 and second nozzle assembly 50 and its lower end is substantially coplanar with the top end of the second nozzle 59 .
- the annular space between the lower end of the second nozzle assembly 50 and the outer wall 100 forms a first gap through which ambient air enters as indicated by arrows 63 .
- This air is entrained with the swirling exhaust air exiting the first nozzle 53 to dilute it.
- the annular space between the lower end of the windband 52 and the second nozzle assembly 50 forms a second gap through which ambient air enters as indicated by arrows 65 .
- This air is entrained with the once diluted exhaust air exiting the second nozzle 59 to further dilute the exhaust.
- further ambient air which enters through the passageways and flows out the top end of the inner wall 106 as shown in FIG. 16 by arrow 67 also dilutes the exhaust before it is expelled at high velocity out the exhaust outlet at the top of the windband 52 .
Abstract
Description
- This claims the benefit of U.S. Provisional Patent Application No. 60/537,609 filed Jan. 20, 2004 and further claims the benefit of U.S. Provisional Patent Application No. 60/558,074 filed Jul. 15, 2004, the disclosure of each of which is hereby incorporated by reference as if set forth in their entirety herein.
- The present invention relates generally to exhaust fans, and more particularly to exhaust fans of the type that draw contaminated air from one or more fume hoods dispersed throughout a building, mix the contaminated air with ambient air to dilute the contaminants, and vent the diluted air from the building into the ambient environment.
- There are many different types of exhaust systems for buildings. In most of these the objective is to simply draw air from inside the building in an efficient manner. In building such as laboratories, fumes are produced by chemical and biological processes, which may have an unpleasant odor, is noxious or toxic. One solution is to exhaust such fumes through a tall exhaust stack which releases the fumes far above ground and roof level. Such exhaust stacks, however, are expensive to build and are unsightly.
- Another solution is to mix the fumes with fresh air to dilute the contaminated air, and exhaust the diluted air upwards from the top of the building at a high velocity. The exhaust is thus diluted and blown high above the building. Examples of such systems are described in U.S. Pat. Nos. 4,806,076; 5,439,349 and 6,112,850. Unfortunately, prior systems are expensive, difficult to maintain and not easily adaptable to meet a wide range of performance specifications.
- In accordance with one aspect of the present invention, an exhaust assembly is provided including an outer wall that defines a cavity therein having an air inlet formed at its bottom end, and an inner wall fastened to the outer wall and positioned in the cavity to divide it into a centrally located chamber and a surrounding annular space. A fan chamber is disposed at the bottom of the cavity and retains a fan coupled to a fan shaft to draw exhaust air in through the air inlet and blow it upward through the annular space. A drive chamber is disposed inside the outer wall and adjacent the fan chamber. A motor is pivotally mounted in the drive chamber. The motor is pivotable between a first engaged position in which a motor shaft is coupled to the fan shaft for driving the fan, and a second disengaged pivoted position.
- In accordance with another aspect of the invention, an exhaust assembly is mounted onto a roof of a building for removing contaminated air from one or more building exhaust vents. The exhaust assembly includes an air inlet receiving the contaminated air, at least one ambient air entrainment zone mixing ambient air with the contaminated air to produce diluted air, and an air outlet exhausting the diluted air. A fan is coupled to a fan shaft to draw the contaminated air through the air inlet and blow it towards the air outlet. A pivotally mounted motor drives a motor shaft that is removably coupled to the fan shaft.
- In accordance with yet another aspect of the invention, an exhaust assembly includes a housing separating a drive chamber from a fan chamber. A motor is pivotally mounted in the drive chamber, and includes a motor shaft. The housing defines an inlet end and an outlet end. A fan is disposed in the fan chamber and coupled to a fan shaft that is, in turn, coupled to the motor shaft to draw air through the air inlet and blow it towards the outlet. At least one passageway extends through the housing. The passageway provides access to the motor.
- In the following description, reference is made to the accompanying drawings, which form a part hereof, and in which there is shown by way of illustration, and not limitation, a preferred embodiment of the invention. Such embodiment also does not define the scope of the invention and reference must therefore be made to the claims for this purpose.
- Reference is hereby made to the following drawings in which like reference numerals correspond to like elements throughout, and in which:
-
FIG. 1 is a schematic perspective view of a building ventilation system constructed in accordance with principles of the present invention; -
FIG. 2 is a side elevation view of an exhaust assembly constructed in accordance with the preferred embodiment; -
FIG. 3 is a perspective view with parts cut away of the plenum which forms part of the exhaust assembly ofFIG. 2 ; -
FIG. 4 is a perspective view of a housing which forms part of the plenum ofFIG. 3 ; -
FIGS. 5A-5E are views of the plenum which forms part of the exhaust assembly ofFIG. 2 ; -
FIGS. 6A-6B are exploded views of the plenum ofFIGS. 5A-5E showing the dampers therein. -
FIG. 7 is a sectional side elevation view of the exhaust assembly illustrated inFIG. 2 ; -
FIG. 8 is an exploded perspective view of the fan assembly ofFIG. 7 ; -
FIG. 9 is an enlarged sectional side elevation view similar toFIG. 7 but illustrating the fan motor in a pivoted position; -
FIG. 10 is a partial view of the fan assembly ofFIG. 7 with parts cut away; -
FIG. 11 is a view in cross-section taken along the plane 11-11 shown inFIG. 7 ; -
FIG. 12 is a view in cross-section taken along the plane 12-12 shown inFIG. 7 ; -
FIG. 13 is a view in cross-section taken along the plane 13-13 shown inFIG. 7 ; -
FIG. 14 is a view in cross-section taken along the plane 14-15 shown inFIG. 7 ; -
FIG. 15 is a schematic diagram of the fan assembly showing the parameters which determine the desired performance; -
FIG. 16 is a pictorial view with parts cut away of a second embodiment of the exhaust assembly of the present invention; and -
FIG. 17 is an elevation view of the exhaust assembly ofFIG. 16 . - Referring initially to
FIG. 1 , abuilding ventilation system 20 includes one ormore fume hoods 22 of the type commonly installed in commercial kitchens, laboratories, manufacturing facilities, or other appropriate locations throughout a building that create noxious or other gasses that are to be vented from the building. In particular, eachfume hood 22 defines achamber 28 that is open at a front of the hood for receiving surrounding air. The upper end ofchamber 28 is linked to the lower end of aconduit 32 that extends upwards from thehood 22 to amanifold 34. Manifold 34 is further connected to ariser 38 that extends upwards to aroof 40 or other upper surface of the building. The upper end ofriser 38 is, in turn, connected to anexhaust assembly 42 that is mounted on top ofroof 40 and extends upwards away from the roof for venting gasses from the building. - Referring also to
FIG. 2 ,exhaust assembly 42 includes aplenum 44 disposed at the base of the assembly that receives exhaust fromriser 38 and mixes it with fresh air. Afan assembly 46 is connected to, and extends upwards from,plenum 44.Fan assembly 46 includes a fan wheel that draws exhaust upward through theplenum 44 and blows it out through awindband 52 disposed at its upper end. Each of these components is described in more detail below. During operation,exhaust assembly 42 draws an airflow that travels from each connectedfume hood 22, throughchamber 28,conduits 32,manifold 34,riser 38 andplenum 44. This exhaust air is mixed with fresh air before being expelled upward at high velocity through an opening in the top of thewindband 52. - The control of this system typically includes both mechanical and electronic control elements. A
conventional damper 36 is disposed inconduit 32 at a location slightly above eachhood 22, and is automatically actuated between a fully open orientation (as illustrated) and a fully closed orientation to control exhaust flow through thechamber 28. Hence, the volume of air that is vented through eachhood 22 is controlled. - The building can be equipped with more than one
exhaust assembly 42, eachsuch assembly 42 being operably coupled either to a separate group offume hoods 22 or tomanifold 34. Accordingly, eachexhaust assembly 42 can be responsible for venting noxious gasses from a particular zone within the building 26, or a plurality ofexhaust assemblies 42 can operate in tandem off thesame manifold 34. In addition, the manifold 34 may be coupled to a general room exhaust in building 26. An electronic control system (not shown) may be used to automatically control the operation of the system. - Referring now to
FIGS. 3-5E ,plenum 44 includes a rectangular housing having a horizontalupper wall 54 that includes anexhaust outlet 92 from theplenum 44, and an opposinglower wall 56 that includes anexhaust inlet 64. A pair of opposingvertical side walls 58 and an integrally connected verticalrear wall 60 extend between the upper andlower walls internal mixing chamber 59. -
Plenum 44 further includes a verticalfront wall 62 disposed opposite therear wall 60. Ahood 66 extends outwardly fromfront wall 62 to provide a bypass air inlet extending through anopening 82 extending throughwall 62, and intochamber 59. Thehood 66 includes opposingvertical side walls 68, a horizontallower wall 72, and an opposing angledupper wall 70 that together define a front opening that can be covered by a frontporous screen 74 that enables ambient (bypass) air to flow through and intoplenum 44.Upper wall 70 is angled down from the upper end of theplenum front wall 62, and extends out a distance beyond lower hood wall 27 to provide a rain hood that protects the interior plenum components from entrainment of snow, water, and debris. An upward-turnedlip 79 that surrounds the outer periphery of upper wall 70 (SeeFIG. 5C ) prevents water from spilling into the bypass air stream. - A
damper 84 is mounted in anopening 82 formed in theplenum front wall 62 and beneath thehood 70.Damper 84 includesdamper blades 86 that are controlled to regulate the flow rate of fresh air intoplenum 44. This flow of fresh air is indicated by Arrow B inFIG. 3 .Damper 84 can be controlled electronically to enable a flow of bypass air intoplenum 44, which ensures that the total air flow through thefan assembly 46 remains constant despite fluctuations in the flow rate of exhaust air to be removed from the building viaexhaust assembly 42. - The exhaust air and bypass air mix inside
chamber 59 to produce once-diluted exhaust air that travels upwards throughexhaust outlet 92 to thefan assembly 46 as indicated inFIG. 3 by Arrow C.A support bracket 88 extends horizontally across the inner surfaces ofwalls chamber 59, and collectively support anisolation damper 90 that isolates the outdoor ambient air entering through thefan assembly 46 when the fan is not in operation. As shown best inFIGS. 6A and 6B theisolation damper 90 is slidably attached to theplenum 44. Thedamper 90 may be activated by gravity backdraft or it may be activated by a shaft as well known by a skilled artisan. - In an alternative embodiment the riser 38 (
FIG. 1 ) may be extended above theroof 40 and connected to an inlet opening formed in aside wall 58 of theplenum 44. - Referring particularly to
FIG. 4 , a gutter is formed around the interior base perimeter of theplenum chamber 59 to collect and drain liquid. The gutter is formed by aflange 89 that extends inward fromwalls chamber 59, and alip 91 that extends up from the inner edge offlange 89. Gutter is linked to adrain 95 extending throughside wall 58 to provide for the transport of condensate that forms inchamber 59. - As shown best in
FIGS. 5A-5C , all four side walls of theplenum 44 are constructed withidentical panels 61 that can be selectively removed to orient theplenum 44 in any desired direction. When apanel 61 is removed, a large opening is formed in the plenum wall. Apanel 61 is removed on one wall to form thefront wall 62 to whichhood 66 is attached. Thepanels 61 and hole patterns are the same on all four sides of theplenum 44, which enables complete freedom to place thehood 66 in the desired orientation. - A shown best in
FIGS. 5D and 5E , theremovable panels 61 on the sides of theplenum 44 also enablemultiple plenums 44 to be combined with asingle riser 38. Theplenums 44 are mounted adjacent one another and thepanels 61 in their abutting walls are removed to form a single, enlargedchamber 63. Any number ofplenums 44 may be combined in this manner with complete flexibility in their orientation. The location of theirhoods 66 is provided by the sameremovable panels 61 and mounting holes on all four walls of theplenum 44 in the manner described above. - The
removable panels 61 also enable access to the interior of theplenum 44 from any direction. This enables routine maintenance and repairs to be made without having to remove theentire exhaust assembly 42 from theriser 38 or thefan assembly 46 from theplenum 44. - Referring to
FIGS. 7, 8 , and 10fan assembly 46 sits on top of theplenum 44 and includes a cylindricalouter wall 100 that is welded to arectangular base plate 102. A set of eightgussets 104 is welded around the lower end of theouter wall 100 to help support it in an upright position. Supported inside theouter wall 100 is a cylindrical shapedinner wall 106 which divides the chamber formed by theouter wall 100 into three parts: acentral drive chamber 108, a surroundingannular space 110 located between the inner andouter walls fan chamber 112 located beneathdrive chamber 108. - A
fan shaft 114 is disposed indrive chamber 108 and is rotatably fastened by abearing 118 to abottom plate 116 that is welded to the bottom end ofinner wall 106.Fan shaft 114 extends down into thefan chamber 112 to support afan wheel 120 at its lower end, and extends up intodrive chamber 108 where it is connected to amotor shaft 152 via aconventional coupling 122.Motor shaft 152 extends through ahorizontal plate 124 that extends across the interior of thedrive chamber 108 and is supported from below by a set ofgussets 126 spaced around the interior of thedrive chamber 108. - As best illustrated in
FIG. 10 ,fan wheel 120 includes a dish-shaped wheelback 130 having a set ofmain fan blades 132 fastened to its lower surface that support a frustum-shapedrim 136 that extends around the perimeter of the fan blades. The lower edge of thisrim 136 fits around a circular-shaped upper lip of aninlet cone 138 that fastens to, and extends upward from thebase plate 102. Thefan wheel 120 is a mixed flow fan wheel such as that sold commercially by Greenheck Fan Corporation under the trademark MODEL QEI and described in pending U.S. patent application Ser. No. 10/297,450 which is incorporated herein by reference. When thefan wheel 120 is rotated, exhaust air from theplenum 44 is drawn upward through the air inlet formed by theinlet cone 138 and blown radially outward and upward into theannular space 110 as shown by arrows 140 (FIG. 11 ). -
Wheelback 130 can also include, if desired, a set ofauxiliary fan blades 134 fastened to its upper surface that produce a radially outward directed air flow. Becauseshaft 114 andlower bearing 118 should provide a good seal with thebottom plate 116, no source of air should be available and this air flow is not well defined. However, if a leak should occur, an air flow pattern is established in which air is drawn from thedrive chamber 108 and directed radially outward through a gap formed between the upper rim of thefan wheel 130 and thebottom plate 116. As a result, exhaust air cannot escape into thedrive chamber 108 even if a leak should occur. - As best illustrated in
FIGS. 7 and 8 , access to drivechamber 108 from outside thefan assembly 46 is provided by two passageways formed on opposite sides. Each passageway is formed by aligned elongated openings formed through theouter wall 100 andinner wall 106 which are connected by apassage wall 144. Thepassage wall 144 encircles the passageway and isolates it from theannular space 110 through which it extends. As shown best inFIG. 11 one can look through either of the passageways and see afan drive motor 150 and its associated components,fan shaft 114, andcoupling 122. Maintenance personnel thus have easy access to these elements for inspection and repair. - Referring now to
FIGS. 7 and 9 , and 11,fan drive motor 150 is located indrive chamber 108 and is mounted tohorizontal support plate 124. Specifically,motor 150 is affixed to the upper surface of a mountingbracket 154, which is fastened to the upper surface ofplate 124 viabolts 156 or like fasteners in order to provide structural integrity during operation. Mountingbracket 154 includes a flat horizontally extendingrectangular plate 160 and a pair of strengtheningflanges 168 extending up from opposing outer ends of the plate.Flanges 168 extend in a direction substantially parallel to an axis extending perpendicular between the passageways. -
Motor shaft 152 extends down through mountingbracket 154, and is connected directly to thefan shaft 114 viacoupling 122 such that motor rotatably drivesfan wheel 120 during operation. When maintenance operations are to be performed onmotor 150 or its associated components insidedrive chamber 108,bolts 156 can be removed, andcoupling 122 can be loosened such thatmotor shaft 152 becomes disengaged fromfan shaft 114. - Advantageously, one edge of mounting
bracket 154 is connected tohorizontal plate 124 via ahinge 158 that permits mountingbracket 154 to pivot relative tohorizontal plate 124 once fastener(s) 156 have been removed. Preferably hinge 158 is oriented perpendicular to an axis extending perpendicular between through the passageways. In this regard, hinge extends perpendicular to flanges 168.Hinge 158permits mounting bracket 154 andmotor 150 to be pivoted between a first position in whichshafts coupling 122 andfasteners 156 can connectbracket 154 toplate 124, and towards one of the passageways in the direction of Arrow A to a second position whereby inspection and maintenance can be performed. Wedge-shapedflanges 168 provide additional structural support for bracket at locationsproximal hinge 158 where increased forces result from motor pivoting. -
Motor 150 can be manually pivoted abouthinge 158 at any angle between 0° and 180° (with respect tobracket 154 and plate 124) to provide the needed access to the components inside chamber 18. In one aspect of the invention,motor 150 pivots at an angle of about 90° such that the vertical surfaces offlanges 168proximal hinge 158 provide a stop with respect tomotor 150 pivoting beyond 90°. Alternatively, the vertical flange surfaces could be positioned to provide additional clearance with respect toplate 124, thereby allowing the motor to pivot beyond 90°. In this instance, a stop in the form of flange 145 could extend from wall 144 (FIG. 9 ) and protrude a desired distance to engage upper surface of bracket oncemotor 150 has pivoted to the desired angle. Once pivoted, a portion ofmotor 150 can extend through one of the passageways while access to components insidedrive chamber 108 can be achieved via the other passageway. - It should be appreciated that
hinge 158 can be disassembled in the usual manner (e.g., by removing the hinge pin) in order to facilitate removal ofmotor 150 fromassembly 42. - Referring also to
FIG. 8 , the exhaust air moves up through theannular space 110 and exits through an annular-shapednozzle 162 formed at the upper ends ofwalls arrows 164. Thenozzle 162 is formed by flaring theupper end 166 ofinner wall 106 such that the cross-sectional area of thenozzle 162 is substantially less than the cross-sectional area of theannular space 110. As a result, exhaust gas velocity is significantly increased as it exits through thenozzle 162. As shown best inFIGS. 11 and 13 ,vanes 170 are mounted in theannular space 110 around its circumference to straighten the path of the exhaust air as it leaves the fan and travels upward. The action ofvanes 170 has been found to increase the entrainment of ambient air into the exhaust as will be described further below. - Referring particularly to
FIGS. 8 and 11 , awindband 52 is mounted on the top offan assembly 46 and aroundnozzle 162. A set ofbrackets 54 is attached around the perimeter of theouter wall 100.Brackets 54 extend upward and radially outward from the top rim ofouter wall 100, and fasten to thewindband 52.Windband 52 is essentially frustum-shaped with a large circular bottom opening coaxially aligned with theannular nozzle 162 about acentral axis 56. The bottom end of thewindband 52 is flared by aninlet bell 58 and the bottom rim of theinlet bell 58 is aligned substantially coplanar with the rim of thenozzle 162. The top end of thewindband 52 is terminated by a circularcylindrical ring section 60 that defines the exhaust outlet of theexhaust assembly 42. - Referring particularly to
FIG. 11 , thewindband 52 is dimensioned and positioned relative to thenozzle 162 to entrain a maximum amount of ambient air into the exhaust air exiting thenozzle 162. The ambient air enters through an annular gap formed between thenozzle 162 and theinlet bell 58 as indicated byarrows 62. It mixes with the swirling, high velocity exhaust exiting throughnozzle 162, and the mixture is expelled through the exhaust outlet at the top of thewindband 52. - A number of features on this system serve to enhance the entrainment of ambient air and improve fan efficiency. The flared
inlet bell 58 at the bottom of thewindband 52 has been found to increase ambient air entrainment by several percent. This improvement in air entrainment is relatively insensitive to the angle of the flare and to the size of theinlet bell 58. The same is true of thering section 60 at the top of thewindband 52. In addition to any improvement thering section 60 may provide by increasing the axial height of thewindband 52, it has been found to increase ambient air entrainment by 5% to 8%. Testing has shown that minor changes in its length do not significantly alter this performance enhancement. - It has been discovered that ambient air entrainment is maximized by minimizing the overlap between the rim of the
nozzle 162 and the bottom rim of thewindband 52. In the preferred embodiment these rims are aligned substantially coplanar with each other such that there is no overlap. - Another feature which significantly improves fan system operation is the shape of the
nozzle 162. It is common practice in this art to shape the nozzle such that the exhaust is directed radially inward to “focus” along thecentral axis 56. This can be achieved by tapering the outer wall radially inward or by tapering both the inner and outer walls radially inward to direct the exhaust towards thecentral axis 56. It is a discovery of the present invention that ambient air entrainment can be increased and pressure losses decreased by shaping thenozzle 162 such that exhaust air is directed radially outward rather than radially inward towards thecentral axis 56. In the preferred embodiment this is achieved by flaring thetop end 166 of theinner wall 106. Air entrainment is increased by several percent and pressure loss can be reduced up to 30% with this structure. It is believed the increase in air entrainment is due to the larger nozzle perimeter that results from not tapering theouter wall 100 radially inward. It is believed that the reduced pressure loss is due to the fact that most of the upward exhaust flow through theannular space 110 is near theouter wall 100 and that by keeping thisouter wall 100 straight, less exhaust air is diverted, or changed in direction by thenozzle 162. - Referring particularly to
FIG. 7 , ambient air is also drawn in through the passageways and mixed with the exhaust air as indicated byarrows 170. This ambient air flows out the open top of the flaredinner wall 100 and mixes with the exhaust emanating from the surroundingnozzle 162. The ambient air is thus mixed from the inside of the exhaust. - As shown in
FIGS. 7, 8 , 11 and 12, to protect the fan drive elements in thedrive chamber 108 from the elements, asloped roof 172 is formed above the top end of thefan shaft 114. Theroof 172 seals off thedrive chamber 108 from the open top end of theinner wall 106, and it is sloped such that rain will drain out the passageways. The slope ofroof 172 also provides additional clearance to enable unobstructed pivoting ofmotor 150. In another aspect of the invention,roof 172 can be eliminated to more easily facilitate the removal ofmotor 150 fromassembly 42, which can be easily achieved by liftingmotor 150 up throughwindband 52. - In addition to the performance enhancements discussed above, the structure of the exhaust assembly lends itself to customization to meet the specific needs of users. Such user specifications include volume of exhaust air, plume height, amount of dilution with ambient air, and assembly height above roof top. User objectives include minimizing cost. Such customization is achieved by selecting the size, or horsepower, of the
fan motor 150, and by changing the four system parameters illustrated inFIG. 15 . - Nozzle Exit Area:
- Increasing this parameter decreases required motor HP, decreases ambient air entrainment, decreases plume rise. Decreasing this parameter increases required motor HP, increases ambient air entrainment, increases plume rise.
- Windband Exit Area:
- Increasing this parameter increases ambient air entrainment, does not significantly affect plume rise or fan flow. Decreasing this parameter decreases ambient air entrainment, does not significantly affect plume rise or fan flow.
- Windband Length:
- Increasing this parameter increases ambient air entrainment, increases plume rise, does not affect fan flow. Decreasing this parameter decreases ambient air entrainment, decreases plume rise, does not affect fan flow.
- Windband Entry Area (Minor Effect)
- Increasing this parameter increases ambient air entrainment, increases plume rise, does not affect fan flow. Decreasing this parameter decreases ambient air entrainment, decreases plume rise, does not affect fan flow.
- For example, for a specified system, Table 1 illustrates how windband length changes the amount of entrained ambient air in the exhaust and Table 2 illustrates how windband exit diameter changes the amount of ambient air entrainment.
TABLE 1 Windband Length Dilution 39 inch 176% 49 inch 184% 59 inch 190% -
TABLE 2 Windband Exit Diameter Dilution 17 inch 165% 21 inch 220% 25 inch 275% - Table 3 illustrates how the amount of entrained ambient and changes as a finction of nozzle exit area and Table 4 illustrates the relationship between the amount of entrained ambient air and windband entry area.
TABLE 3 Nozzle Exit Area Dilution .79 ft 2120% .52 ft2 140% .43 ft2 165% -
TABLE 4 Windband Entry Area Dilution 10.3 ft2 176% 12.9 ft2 178% - In Tables 1-4 the dilution is calculated by dividing the windband exit flow by the flow through the fan assembly.
- Referring particularly to
FIGS. 16 and 17 , an alternative embodiment of the invention is substantially the same as the preferred embodiment described above except the nozzle end of thefan assembly 46 is modified to add an additional,second nozzle assembly 50. In this second embodiment theouter wall 100 of the fan assembly is tapered radially inward at its upper end to form afirst nozzle 53 with theinner wall 106 which extends straight upward, beyond thenozzle 53. Thesecond nozzle assembly 50 is a frustum-shaped element which is fastened to the extended portion of theinner wall 106 bybrackets 55. It is flared around its bottom end to form aninlet bell 57 similar to that on thewindband 52. Thesecond nozzle assembly 50 is concentric about theinner wall 106, and its top end is coplanar with the top end of theinner wall 106 to form an annular-shapedsecond nozzle 59 therebetween.Brackets 61 fasten around the perimeter of thesecond nozzle assembly 50 and extend upward and radially outward to support thewindband 52. Thewindband 52 is also aligned coaxial with theinner wall 106 andsecond nozzle assembly 50 and its lower end is substantially coplanar with the top end of thesecond nozzle 59. In this alternative embodiment it is also possible to form thefirst nozzle 53 by flaring theinner wall 106 outward rather than tapering theouter wall 100. - Referring particularly to
FIG. 17 , the annular space between the lower end of thesecond nozzle assembly 50 and theouter wall 100 forms a first gap through which ambient air enters as indicated byarrows 63. This air is entrained with the swirling exhaust air exiting thefirst nozzle 53 to dilute it. Similarly, the annular space between the lower end of thewindband 52 and thesecond nozzle assembly 50 forms a second gap through which ambient air enters as indicated byarrows 65. This air is entrained with the once diluted exhaust air exiting thesecond nozzle 59 to further dilute the exhaust. As with the first embodiment, further ambient air which enters through the passageways and flows out the top end of theinner wall 106 as shown inFIG. 16 byarrow 67 also dilutes the exhaust before it is expelled at high velocity out the exhaust outlet at the top of thewindband 52. - The above description has been that of the preferred embodiment of the present invention, and it will occur to those having ordinary skill in the art that many modifications may be made without departing from the spirit and scope of the invention. In order to apprise the public of the various embodiments that may fall in the scope of the present invention, the following claims are made.
Claims (41)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/924,532 US20050159101A1 (en) | 2004-01-20 | 2004-08-24 | Pivotal direct drive motor for exhaust assembly |
US11/003,257 US7320636B2 (en) | 2004-01-20 | 2004-12-03 | Exhaust fan assembly having flexible coupling |
EP05705885A EP1723340A2 (en) | 2004-01-20 | 2005-01-19 | Pivotal direct drive motor for exhaust assembly |
PCT/US2005/001719 WO2005072213A2 (en) | 2004-01-20 | 2005-01-19 | Exhaust fan assembly having flexible coupling |
PCT/US2005/001642 WO2005072202A2 (en) | 2004-01-20 | 2005-01-19 | Pivotal direct drive motor for exhaust assembly |
MXPA05000802A MXPA05000802A (en) | 2004-01-20 | 2005-01-19 | Exhaust fan assembly having flexible coupling. |
EP05705919A EP1718871A2 (en) | 2004-01-20 | 2005-01-19 | Exhaust fan assembly having flexible coupling |
SG200705355-6A SG134331A1 (en) | 2004-01-20 | 2005-01-19 | Pivotal direct drive motor for exhaust assembly |
CA2493426A CA2493426C (en) | 2004-01-20 | 2005-01-19 | Exhaust fan assembly having flexible coupling |
HK08104448.2A HK1114659A1 (en) | 2004-01-20 | 2008-04-22 | Exhaust fan assembly having flexible coupling |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US53760904P | 2004-01-20 | 2004-01-20 | |
US58807404P | 2004-07-15 | 2004-07-15 | |
US10/924,532 US20050159101A1 (en) | 2004-01-20 | 2004-08-24 | Pivotal direct drive motor for exhaust assembly |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/003,257 Continuation-In-Part US7320636B2 (en) | 2004-01-20 | 2004-12-03 | Exhaust fan assembly having flexible coupling |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050159101A1 true US20050159101A1 (en) | 2005-07-21 |
Family
ID=34753704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/924,532 Abandoned US20050159101A1 (en) | 2004-01-20 | 2004-08-24 | Pivotal direct drive motor for exhaust assembly |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050159101A1 (en) |
EP (1) | EP1723340A2 (en) |
SG (1) | SG134331A1 (en) |
WO (1) | WO2005072202A2 (en) |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009091477A1 (en) * | 2008-01-18 | 2009-07-23 | Mpc Inc. | Control system for exhaust gas fan system |
WO2012031295A1 (en) * | 2010-09-03 | 2012-03-08 | Twin City Fan Companies, Ltd. | Tubular inline exhaust fan assembly |
US8579602B1 (en) | 2010-12-17 | 2013-11-12 | Loren Cook Company | Isolated de-coupling of fan drive in exhaust assembly |
US8616842B2 (en) | 2009-03-30 | 2013-12-31 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and method |
US20140187136A1 (en) * | 2004-01-20 | 2014-07-03 | Greenheck Fan Corporation | Exhaust fan assembly |
US20150016990A1 (en) * | 2012-02-07 | 2015-01-15 | Stego-Holding Gmbh | Fan and arrangement having such a fan |
US9151295B2 (en) | 2008-05-30 | 2015-10-06 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
USD746971S1 (en) | 2012-05-15 | 2016-01-05 | Airius Ip Holdings, Llc | Air moving device |
US9335061B2 (en) | 2008-05-30 | 2016-05-10 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US9459020B2 (en) | 2008-05-30 | 2016-10-04 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US9631627B2 (en) | 2004-03-15 | 2017-04-25 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US9702576B2 (en) | 2013-12-19 | 2017-07-11 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
USD805176S1 (en) | 2016-05-06 | 2017-12-12 | Airius Ip Holdings, Llc | Air moving device |
USD820967S1 (en) | 2016-05-06 | 2018-06-19 | Airius Ip Holdings Llc | Air moving device |
US10024531B2 (en) | 2013-12-19 | 2018-07-17 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US10054130B1 (en) | 2017-06-19 | 2018-08-21 | Dekalb Blower Inc. | Rotary seal for an industrial fan assembly |
US10221861B2 (en) | 2014-06-06 | 2019-03-05 | Airius Ip Holdings Llc | Columnar air moving devices, systems and methods |
US10245546B1 (en) | 2018-08-22 | 2019-04-02 | H & H Inventions & Enterprises, Inc. | Exhaust gas purification method and system |
US10356943B2 (en) | 2017-06-19 | 2019-07-16 | Dekalb Blower Inc. | Industrial fan assembly |
US10465704B2 (en) * | 2015-11-25 | 2019-11-05 | Twin City Companies, Ltd. | Media concentration device and method |
US10487852B2 (en) | 2016-06-24 | 2019-11-26 | Airius Ip Holdings, Llc | Air moving device |
US10605258B2 (en) | 2017-06-19 | 2020-03-31 | Dekalb Blower Inc. | Forward curved blade impeller for an industrial fan assembly |
US10605262B2 (en) | 2017-06-19 | 2020-03-31 | Dekalb Blower Inc. | Axial blade impeller for an industrial fan assembly |
USD885550S1 (en) | 2017-07-31 | 2020-05-26 | Airius Ip Holdings, Llc | Air moving device |
USD886275S1 (en) | 2017-01-26 | 2020-06-02 | Airius Ip Holdings, Llc | Air moving device |
USD887541S1 (en) | 2019-03-21 | 2020-06-16 | Airius Ip Holdings, Llc | Air moving device |
US10935040B2 (en) | 2017-06-19 | 2021-03-02 | The Boeing Company | Radial blade impeller for an industrial fan assembly |
US11374458B2 (en) | 2018-10-24 | 2022-06-28 | Dekalb Blower Inc. | Electric motor with fluid cooling |
US11598539B2 (en) | 2019-04-17 | 2023-03-07 | Airius Ip Holdings, Llc | Air moving device with bypass intake |
Citations (57)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US144586A (en) * | 1873-11-11 | Improvement in chimney-tops | ||
US297972A (en) * | 1884-05-06 | Ventilating-flue cap | ||
US352597A (en) * | 1886-11-16 | Feedeeic w | ||
US603881A (en) * | 1898-05-10 | Otto kuphal | ||
US736748A (en) * | 1902-04-14 | 1903-08-18 | Carl H A Beckman | Chimney-top and ventilator. |
US1126348A (en) * | 1914-06-24 | 1915-01-26 | Anthony M Basman | Ventilator-hood. |
US1296040A (en) * | 1918-02-23 | 1919-03-04 | John Bontya | Locomotive draft apparatus. |
US1346633A (en) * | 1919-09-29 | 1920-07-13 | Oscar E Cloud | Ventilator |
US1394735A (en) * | 1921-10-25 | Atyzi xl tobjjast | ||
US1891860A (en) * | 1930-12-12 | 1932-12-20 | Woolf Isaac | Chimney vent |
US1986176A (en) * | 1933-03-18 | 1935-01-01 | Zwerling Harry | Ventilator |
US1988810A (en) * | 1932-06-08 | 1935-01-22 | Frederick N Ross | Ventilator |
US2188564A (en) * | 1939-02-08 | 1940-01-30 | Floyd F Schultz | Draft regulator for chimneys |
US2265112A (en) * | 1940-04-23 | 1941-12-02 | Davies Charles | Ventilator |
US2363733A (en) * | 1941-08-15 | 1944-11-28 | Karol Josef | Ventilator |
US2478761A (en) * | 1946-01-28 | 1949-08-09 | Kool Vent Metal Awning Company | Ventilator head |
US2605693A (en) * | 1950-02-10 | 1952-08-05 | Meryle R Hansen | Ventilating cap for chimneys and the like |
US2619021A (en) * | 1949-08-04 | 1952-11-25 | Ilg Electric Ventilating Compa | Ventilator fan mounting |
US2714847A (en) * | 1953-03-13 | 1955-08-09 | Svebel Albert | Flue accelerator |
US2805615A (en) * | 1954-10-04 | 1957-09-10 | Loren Cook Company | Ventilators |
US2842041A (en) * | 1953-11-02 | 1958-07-08 | Burger Armin | Chimney attachment |
US2875678A (en) * | 1954-07-06 | 1959-03-03 | Shepherd Wyley | Ventilators |
US3045579A (en) * | 1959-12-07 | 1962-07-24 | Jenn Air Products Company Inc | Vertical discharge roof exhauster |
US3069071A (en) * | 1961-03-03 | 1962-12-18 | Westinghouse Electric Corp | Fans having radial flow rotors in axial flow casings |
US3087409A (en) * | 1959-12-03 | 1963-04-30 | Dura Vent Corp | Vent cowl |
US3115820A (en) * | 1962-06-15 | 1963-12-31 | Carl W Adelt | Chimney cap construction |
US3209670A (en) * | 1963-06-18 | 1965-10-05 | William Twickler & Sons Roofin | Ventilator for gas exhaust stacks |
US3229896A (en) * | 1963-11-05 | 1966-01-18 | American Agile Co | Vaneaxial fan |
US3283694A (en) * | 1964-03-04 | 1966-11-08 | Tempmaster Corp | Air mixing and sound attenuating unit |
US3285567A (en) * | 1963-11-29 | 1966-11-15 | Bristol Siddeley Engines Ltd | Axial flow turbines and compressors |
US3347147A (en) * | 1967-03-02 | 1967-10-17 | Ben O Howard | Exhauster including venturi means |
US3385197A (en) * | 1966-08-05 | 1968-05-28 | Greber Henry | Wind ejector for cooling towers and stacks |
US3537411A (en) * | 1969-01-15 | 1970-11-03 | John R Roy | Double shelled chimney stack |
US3719032A (en) * | 1971-10-26 | 1973-03-06 | G Cash | Induction condenser |
US3727566A (en) * | 1971-12-10 | 1973-04-17 | J Roy | Smokestack with vibration damper |
US3730073A (en) * | 1971-08-04 | 1973-05-01 | P Potter | Chimneys |
US3797373A (en) * | 1972-07-19 | 1974-03-19 | Npi Corp | Air curtain |
US3817162A (en) * | 1973-03-27 | 1974-06-18 | Research Corp | Flue stack outlet |
US4095514A (en) * | 1976-11-08 | 1978-06-20 | Airtek Corporation | Air pollution control device |
US4184417A (en) * | 1977-12-02 | 1980-01-22 | Ford Motor Company | Plume elimination mechanism |
US4204463A (en) * | 1978-07-18 | 1980-05-27 | Jack Carty | Stack design |
US4344370A (en) * | 1980-07-24 | 1982-08-17 | Industrial Air, Inc. | Apparatus for discharging exhaust gas at high velocity |
US4655121A (en) * | 1984-11-22 | 1987-04-07 | Heinrich Brinkmann Anlagenverpachtung Gmbh & Co. Kg | Chimney deflector hood |
US4742765A (en) * | 1985-12-21 | 1988-05-10 | Wilhelm Gebhardt Gmbh | Power roof ventilator |
US4768424A (en) * | 1984-10-23 | 1988-09-06 | Wilhelm Gebhardt And Co. Gmbh | Roof ventilator |
US4806076A (en) * | 1988-02-22 | 1989-02-21 | Strobic Air Corporation | Radial upblast exhaust fan apparatus |
US4922766A (en) * | 1988-01-06 | 1990-05-08 | Seong-Do Moon | Electric fan apparatus |
US4993314A (en) * | 1976-02-20 | 1991-02-19 | The United States Of America As Represented By The Secretary Of The Navy | Convectively cooled hot gas exhaust structure to reduce infrared radiation |
US5154584A (en) * | 1988-01-15 | 1992-10-13 | Henry Filters, Inc. | Pump for filtration systems |
US5185941A (en) * | 1990-06-01 | 1993-02-16 | Challenge Industries | Dryer blower cleanout door assembly |
US5326317A (en) * | 1991-10-18 | 1994-07-05 | Matsushita Seiko Co., Ltd. | Ventilator |
US5439349A (en) * | 1994-11-15 | 1995-08-08 | Kupferberg; Minel | Exhaust fan apparatus |
US5842832A (en) * | 1996-12-20 | 1998-12-01 | Thut; Bruno H. | Pump for pumping molten metal having cleaning and repair features |
US6112850A (en) * | 1999-09-07 | 2000-09-05 | Met Pro Corporation | Acoustic silencer nozzle |
US20010014284A1 (en) * | 1999-08-04 | 2001-08-16 | Mccabe Francis J. | Intake and exhaust damper with movable motor fan assembly |
US6431974B1 (en) * | 2000-03-29 | 2002-08-13 | Met Pro Corporation | Acoustic wind band |
US20030114098A1 (en) * | 2001-12-13 | 2003-06-19 | Alan Hill | Exhaust gas nozzle for fan |
-
2004
- 2004-08-24 US US10/924,532 patent/US20050159101A1/en not_active Abandoned
-
2005
- 2005-01-19 WO PCT/US2005/001642 patent/WO2005072202A2/en active Application Filing
- 2005-01-19 SG SG200705355-6A patent/SG134331A1/en unknown
- 2005-01-19 EP EP05705885A patent/EP1723340A2/en not_active Withdrawn
Patent Citations (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1394735A (en) * | 1921-10-25 | Atyzi xl tobjjast | ||
US297972A (en) * | 1884-05-06 | Ventilating-flue cap | ||
US352597A (en) * | 1886-11-16 | Feedeeic w | ||
US603881A (en) * | 1898-05-10 | Otto kuphal | ||
US144586A (en) * | 1873-11-11 | Improvement in chimney-tops | ||
US736748A (en) * | 1902-04-14 | 1903-08-18 | Carl H A Beckman | Chimney-top and ventilator. |
US1126348A (en) * | 1914-06-24 | 1915-01-26 | Anthony M Basman | Ventilator-hood. |
US1296040A (en) * | 1918-02-23 | 1919-03-04 | John Bontya | Locomotive draft apparatus. |
US1346633A (en) * | 1919-09-29 | 1920-07-13 | Oscar E Cloud | Ventilator |
US1891860A (en) * | 1930-12-12 | 1932-12-20 | Woolf Isaac | Chimney vent |
US1988810A (en) * | 1932-06-08 | 1935-01-22 | Frederick N Ross | Ventilator |
US1986176A (en) * | 1933-03-18 | 1935-01-01 | Zwerling Harry | Ventilator |
US2188564A (en) * | 1939-02-08 | 1940-01-30 | Floyd F Schultz | Draft regulator for chimneys |
US2265112A (en) * | 1940-04-23 | 1941-12-02 | Davies Charles | Ventilator |
US2363733A (en) * | 1941-08-15 | 1944-11-28 | Karol Josef | Ventilator |
US2478761A (en) * | 1946-01-28 | 1949-08-09 | Kool Vent Metal Awning Company | Ventilator head |
US2619021A (en) * | 1949-08-04 | 1952-11-25 | Ilg Electric Ventilating Compa | Ventilator fan mounting |
US2605693A (en) * | 1950-02-10 | 1952-08-05 | Meryle R Hansen | Ventilating cap for chimneys and the like |
US2714847A (en) * | 1953-03-13 | 1955-08-09 | Svebel Albert | Flue accelerator |
US2842041A (en) * | 1953-11-02 | 1958-07-08 | Burger Armin | Chimney attachment |
US2875678A (en) * | 1954-07-06 | 1959-03-03 | Shepherd Wyley | Ventilators |
US2805615A (en) * | 1954-10-04 | 1957-09-10 | Loren Cook Company | Ventilators |
US3087409A (en) * | 1959-12-03 | 1963-04-30 | Dura Vent Corp | Vent cowl |
US3045579A (en) * | 1959-12-07 | 1962-07-24 | Jenn Air Products Company Inc | Vertical discharge roof exhauster |
US3069071A (en) * | 1961-03-03 | 1962-12-18 | Westinghouse Electric Corp | Fans having radial flow rotors in axial flow casings |
US3115820A (en) * | 1962-06-15 | 1963-12-31 | Carl W Adelt | Chimney cap construction |
US3209670A (en) * | 1963-06-18 | 1965-10-05 | William Twickler & Sons Roofin | Ventilator for gas exhaust stacks |
US3229896A (en) * | 1963-11-05 | 1966-01-18 | American Agile Co | Vaneaxial fan |
US3285567A (en) * | 1963-11-29 | 1966-11-15 | Bristol Siddeley Engines Ltd | Axial flow turbines and compressors |
US3283694A (en) * | 1964-03-04 | 1966-11-08 | Tempmaster Corp | Air mixing and sound attenuating unit |
US3385197A (en) * | 1966-08-05 | 1968-05-28 | Greber Henry | Wind ejector for cooling towers and stacks |
US3347147A (en) * | 1967-03-02 | 1967-10-17 | Ben O Howard | Exhauster including venturi means |
US3537411A (en) * | 1969-01-15 | 1970-11-03 | John R Roy | Double shelled chimney stack |
US3730073A (en) * | 1971-08-04 | 1973-05-01 | P Potter | Chimneys |
US3719032A (en) * | 1971-10-26 | 1973-03-06 | G Cash | Induction condenser |
US3727566A (en) * | 1971-12-10 | 1973-04-17 | J Roy | Smokestack with vibration damper |
US3797373A (en) * | 1972-07-19 | 1974-03-19 | Npi Corp | Air curtain |
US3817162A (en) * | 1973-03-27 | 1974-06-18 | Research Corp | Flue stack outlet |
US4993314A (en) * | 1976-02-20 | 1991-02-19 | The United States Of America As Represented By The Secretary Of The Navy | Convectively cooled hot gas exhaust structure to reduce infrared radiation |
US4095514A (en) * | 1976-11-08 | 1978-06-20 | Airtek Corporation | Air pollution control device |
US4184417A (en) * | 1977-12-02 | 1980-01-22 | Ford Motor Company | Plume elimination mechanism |
US4204463A (en) * | 1978-07-18 | 1980-05-27 | Jack Carty | Stack design |
US4344370A (en) * | 1980-07-24 | 1982-08-17 | Industrial Air, Inc. | Apparatus for discharging exhaust gas at high velocity |
US4768424A (en) * | 1984-10-23 | 1988-09-06 | Wilhelm Gebhardt And Co. Gmbh | Roof ventilator |
US4655121A (en) * | 1984-11-22 | 1987-04-07 | Heinrich Brinkmann Anlagenverpachtung Gmbh & Co. Kg | Chimney deflector hood |
US4742765A (en) * | 1985-12-21 | 1988-05-10 | Wilhelm Gebhardt Gmbh | Power roof ventilator |
US4922766A (en) * | 1988-01-06 | 1990-05-08 | Seong-Do Moon | Electric fan apparatus |
US5154584A (en) * | 1988-01-15 | 1992-10-13 | Henry Filters, Inc. | Pump for filtration systems |
US4806076A (en) * | 1988-02-22 | 1989-02-21 | Strobic Air Corporation | Radial upblast exhaust fan apparatus |
US5185941A (en) * | 1990-06-01 | 1993-02-16 | Challenge Industries | Dryer blower cleanout door assembly |
US5326317A (en) * | 1991-10-18 | 1994-07-05 | Matsushita Seiko Co., Ltd. | Ventilator |
US5439349A (en) * | 1994-11-15 | 1995-08-08 | Kupferberg; Minel | Exhaust fan apparatus |
US5842832A (en) * | 1996-12-20 | 1998-12-01 | Thut; Bruno H. | Pump for pumping molten metal having cleaning and repair features |
US20010014284A1 (en) * | 1999-08-04 | 2001-08-16 | Mccabe Francis J. | Intake and exhaust damper with movable motor fan assembly |
US6112850A (en) * | 1999-09-07 | 2000-09-05 | Met Pro Corporation | Acoustic silencer nozzle |
US6431974B1 (en) * | 2000-03-29 | 2002-08-13 | Met Pro Corporation | Acoustic wind band |
US20030114098A1 (en) * | 2001-12-13 | 2003-06-19 | Alan Hill | Exhaust gas nozzle for fan |
US6676503B2 (en) * | 2001-12-13 | 2004-01-13 | Plasticair Inc. | Exhaust gas nozzle for fan |
Cited By (56)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140187136A1 (en) * | 2004-01-20 | 2014-07-03 | Greenheck Fan Corporation | Exhaust fan assembly |
US9636722B2 (en) * | 2004-01-20 | 2017-05-02 | Greenheck Fan Corporation | Exhaust fan assembly |
US11053948B2 (en) | 2004-03-15 | 2021-07-06 | Airius Ip Holdings, Llc | Temperature destratification systems |
US11365743B2 (en) | 2004-03-15 | 2022-06-21 | Airius Ip Holdings, Llc | Temperature destratification systems |
US10487840B2 (en) | 2004-03-15 | 2019-11-26 | Airius Ip Holdings, Llc | Temperature destratification systems |
US11703062B2 (en) | 2004-03-15 | 2023-07-18 | Airius Ip Holdings, Llc | Temperature destratification systems |
US9714663B1 (en) | 2004-03-15 | 2017-07-25 | Airius Ip Holdings, Llc | Temperature destratification systems |
US9631627B2 (en) | 2004-03-15 | 2017-04-25 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US9423128B2 (en) * | 2008-01-18 | 2016-08-23 | Mpc, Inc. | Control system for exhaust gas fan system |
US20110053488A1 (en) * | 2008-01-18 | 2011-03-03 | Mpc Inc. | Control system for exhaust gas fan system |
US10760791B2 (en) | 2008-01-18 | 2020-09-01 | Strobic Air Corporation | Control system for exhaust gas fan system |
WO2009091477A1 (en) * | 2008-01-18 | 2009-07-23 | Mpc Inc. | Control system for exhaust gas fan system |
US9335061B2 (en) | 2008-05-30 | 2016-05-10 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US9151295B2 (en) | 2008-05-30 | 2015-10-06 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US9970457B2 (en) | 2008-05-30 | 2018-05-15 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US9459020B2 (en) | 2008-05-30 | 2016-10-04 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US8616842B2 (en) | 2009-03-30 | 2013-12-31 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and method |
WO2012031295A1 (en) * | 2010-09-03 | 2012-03-08 | Twin City Fan Companies, Ltd. | Tubular inline exhaust fan assembly |
US20130011239A1 (en) * | 2010-09-03 | 2013-01-10 | Daniel Khalitov | Tubular inline exhaust fan assembly |
US8758101B2 (en) * | 2010-09-03 | 2014-06-24 | Twin City Fan Companies, Ltd. | Tubular inline exhaust fan assembly |
US8579602B1 (en) | 2010-12-17 | 2013-11-12 | Loren Cook Company | Isolated de-coupling of fan drive in exhaust assembly |
US10184489B2 (en) | 2011-06-15 | 2019-01-22 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US20150016990A1 (en) * | 2012-02-07 | 2015-01-15 | Stego-Holding Gmbh | Fan and arrangement having such a fan |
US10202979B2 (en) * | 2012-02-07 | 2019-02-12 | Stego-Holding Gmbh | Fan and arrangement having such a fan |
USD746971S1 (en) | 2012-05-15 | 2016-01-05 | Airius Ip Holdings, Llc | Air moving device |
USD783795S1 (en) | 2012-05-15 | 2017-04-11 | Airius Ip Holdings, Llc | Air moving device |
USD926963S1 (en) | 2012-05-15 | 2021-08-03 | Airius Ip Holdings, Llc | Air moving device |
US11221153B2 (en) | 2013-12-19 | 2022-01-11 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US10641506B2 (en) | 2013-12-19 | 2020-05-05 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US10024531B2 (en) | 2013-12-19 | 2018-07-17 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US11092330B2 (en) | 2013-12-19 | 2021-08-17 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US9702576B2 (en) | 2013-12-19 | 2017-07-11 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US10655841B2 (en) | 2013-12-19 | 2020-05-19 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US10221861B2 (en) | 2014-06-06 | 2019-03-05 | Airius Ip Holdings Llc | Columnar air moving devices, systems and methods |
US11236766B2 (en) | 2014-06-06 | 2022-02-01 | Airius Ip Holdings Llc | Columnar air moving devices, systems and methods |
US11713773B2 (en) | 2014-06-06 | 2023-08-01 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US10724542B2 (en) | 2014-06-06 | 2020-07-28 | Airius Ip Holdings, Llc | Columnar air moving devices, systems and methods |
US10465704B2 (en) * | 2015-11-25 | 2019-11-05 | Twin City Companies, Ltd. | Media concentration device and method |
USD820967S1 (en) | 2016-05-06 | 2018-06-19 | Airius Ip Holdings Llc | Air moving device |
USD805176S1 (en) | 2016-05-06 | 2017-12-12 | Airius Ip Holdings, Llc | Air moving device |
US11421710B2 (en) | 2016-06-24 | 2022-08-23 | Airius Ip Holdings, Llc | Air moving device |
US11105341B2 (en) | 2016-06-24 | 2021-08-31 | Airius Ip Holdings, Llc | Air moving device |
US10487852B2 (en) | 2016-06-24 | 2019-11-26 | Airius Ip Holdings, Llc | Air moving device |
USD886275S1 (en) | 2017-01-26 | 2020-06-02 | Airius Ip Holdings, Llc | Air moving device |
US10356943B2 (en) | 2017-06-19 | 2019-07-16 | Dekalb Blower Inc. | Industrial fan assembly |
US10935040B2 (en) | 2017-06-19 | 2021-03-02 | The Boeing Company | Radial blade impeller for an industrial fan assembly |
US10605262B2 (en) | 2017-06-19 | 2020-03-31 | Dekalb Blower Inc. | Axial blade impeller for an industrial fan assembly |
US10605258B2 (en) | 2017-06-19 | 2020-03-31 | Dekalb Blower Inc. | Forward curved blade impeller for an industrial fan assembly |
US10054130B1 (en) | 2017-06-19 | 2018-08-21 | Dekalb Blower Inc. | Rotary seal for an industrial fan assembly |
USD885550S1 (en) | 2017-07-31 | 2020-05-26 | Airius Ip Holdings, Llc | Air moving device |
US10905993B2 (en) | 2018-08-22 | 2021-02-02 | H & H Inventions & Enterprises, Inc. | Exhaust gas purification method and system |
US10245546B1 (en) | 2018-08-22 | 2019-04-02 | H & H Inventions & Enterprises, Inc. | Exhaust gas purification method and system |
US11374458B2 (en) | 2018-10-24 | 2022-06-28 | Dekalb Blower Inc. | Electric motor with fluid cooling |
USD887541S1 (en) | 2019-03-21 | 2020-06-16 | Airius Ip Holdings, Llc | Air moving device |
US11598539B2 (en) | 2019-04-17 | 2023-03-07 | Airius Ip Holdings, Llc | Air moving device with bypass intake |
US11781761B1 (en) | 2019-04-17 | 2023-10-10 | Airius Ip Holdings, Llc | Air moving device with bypass intake |
Also Published As
Publication number | Publication date |
---|---|
EP1723340A2 (en) | 2006-11-22 |
SG134331A1 (en) | 2007-08-29 |
WO2005072202A3 (en) | 2007-07-05 |
WO2005072202A2 (en) | 2005-08-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20050159101A1 (en) | Pivotal direct drive motor for exhaust assembly | |
US9636722B2 (en) | Exhaust fan assembly | |
US7320636B2 (en) | Exhaust fan assembly having flexible coupling | |
CA2493651C (en) | Exhaust fan assembly having a windband | |
US4506655A (en) | Compact double fan apparatus and method with grease-separating capabilities | |
CA1157221A (en) | Apparatus for discharging exhaust gas at high velocity | |
CN101133285A (en) | Pivotal direct drive motor for exhaust assembly | |
CA2313363C (en) | Acoustic wind band | |
US20050166809A1 (en) | Upblast fan nozzle with wind deflecting panels | |
US20060014484A1 (en) | Exhaust fan assembly having H-out nozzle | |
US3349998A (en) | Ventilating apparatus | |
JP2003083581A (en) | Air supply/exhaust apparatus | |
EP1426702A1 (en) | Industrial ventilation apparatus | |
JP2002340381A (en) | Air supply and exhaust equipment | |
KR200259895Y1 (en) | The air khen the face plate of the blower the structure | |
KR20130059794A (en) | Air conditioning ventilator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GREENHECK FAN CORPORATION, WISCONSIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HRDINA, TERRY LEE;KOEPPEL, SCOTT JAMES;SELIGER, MICHAEL GLENN;REEL/FRAME:017975/0917;SIGNING DATES FROM 20040823 TO 20040824 |
|
AS | Assignment |
Owner name: BANK OF AMERICA, N.A., AS COLLATERAL AGENT, ILLINO Free format text: NOTICE OF GRANT OF SECURITY INTEREST;ASSIGNOR:GREENHECK FAN CORPORATION;REEL/FRAME:019930/0208 Effective date: 20070928 Owner name: BANK OF AMERICA, N.A., AS COLLATERAL AGENT,ILLINOI Free format text: NOTICE OF GRANT OF SECURITY INTEREST;ASSIGNOR:GREENHECK FAN CORPORATION;REEL/FRAME:019930/0208 Effective date: 20070928 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |