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US 6,648,935 B2Granted
Dual stage extraction blower for removing contaminants from an air stream
OwnerJames E. Petersen, Jr.inventor
Life of this patent
Estimating the term…
Abstract
A two stage extracting blower that cleans liquid and solid contaminants from supply air, and provides high velocity air for cooling equipment, personnel and/or structures. In a first air cleaning stage, the blower uses air velocity and the centrifugal force of a rotating impeller to separate heavier contaminants entrained in a dirty air stream into a rear partitioned chamber of the blower housing. In a second air cleaning stage, the blower uses centrifugal forces imparted by the impeller on lighter contaminants to cause the contaminants to be collected in a skimmer provided in the partially cleansed air stream prior to release of the air stream from the blower.
Claims47
An extracting blower, comprising:
- a. a fan housing having a longitudinal axis, a front chamber and a rear chamber with an interior wall disposed within the housing to separate the front chamber from the rear chamber;
- b. a first opening in the fan housing and a second opening in the interior wall;
- c. a rotatable impeller having a longitudinal axis, located within the fan housing, the impeller disposed to extend from the rear chamber to the front chamber through the second opening in the interior wall, the impeller including a plurality of impeller blades extending outwardly from the longitudinal axis of the impeller and extending substantially along the longitudinal axis of the fan housing and through the second opening;
- d. the fan housing having a side wall, a front wall, and a rear wall, including a tangential section extending tangentially from the side wall, the tangential section, a portion of each of the side wall, front wall, and rear wall, forming a chute internally defined by a forward portion and a rear portion, wherein the forward portion of the chute is in fluid communication with the front chamber of the fan housing and the rear portion of the chute is in fluid communication with the rear chamber of the fan housing;
- e. a skimmer disposed within the forward portion of the chute, the skimmer comprising a contaminant deflection wall extending substantially along the longitudinal axis of the fan housing between the front wall and the interior wall, the contaminant deflection wall lying in a plane which is substantially parallel with the longitudinal axis of the impeller.
2 more elements
An extracting blower, comprising:
- a. a first stage air cleaning apparatus having a centrifugal impeller disposed to extend between a front clean air chamber and a rear contaminant chamber;
- b. a second stage air cleaning apparatus having an air chute in fluid communication with the front clean air chamber and a skimmer disposed within the clean air chute, the skimmer comprising a contaminant deflection wall;
- and
- c. a cowling attached adjacent the first stage air cleaning apparatus, the cowling comprising a first front wall spaced apart from the first stage air cleaning apparatus, and a side wall disposed between the first front wall and the first stage cleaning apparatus so as to form a downward facing opening for drawing air into the blower.
1 more element
An extracting blower, comprising:
- a. a fan housing in which is defined a front chamber and a rear chamber with an interior wall disposed within the housing to separate the front chamber from the rear chamber;
- b. a first opening in the fan housing and a second opening in the interior wall;
- c. a rotatable impeller located within the fan housing, the impeller disposed to extend from the rear chamber to the front chamber through the second opening in the interior wall, the impeller including a back plate oriented within the rear chamber and a plurality of impeller blades extending through the second opening from the back plate;
- d. the housing including a tangential section extending therefrom, the tangential section forming a chute internally defined by a forward portion and a rear portion, wherein the forward portion is in fluid communication with the front chamber and the rear portion is in fluid communication with the rear chamber;
- e. a skimmer disposed within the forward portion of the chute, the skimmer comprising a contaminant deflection wall;
- and
- f. a cowling attached adjacent the first opening, the cowling comprising a first front wall spaced apart from the blower housing, and a side wall disposed between the first front wall and the blower housing so as to form a downward facing opening for drawing air into the blower.
4 more elements
An extracting blower, comprising:
- a. a fan housing in which is defined a front chamber and a rear chamber with an interior wall disposed within the housing to separate the front chamber from the rear chamber;
- b. a first opening in the fan housing and a second opening in the interior wall;
- c. a rotatable impeller located within the fan housing, the impeller disposed to extend from the rear chamber to the front chamber through the second opening in the interior wall, the impeller including a back plate oriented within the rear chamber and a plurality of impeller blades extending through the second opening from the back plate, the impeller blades are defined by a leading edge, a trailing edge and an outer edge, wherein at least one of the impeller blades is provided with a notch adjacent the outer edge;
- d. the housing including a tangential section extending therefrom, the tangential section forming a chute internally defined by a forward portion and a rear portion, wherein the forward portion is in fluid communication with the front chamber and the rear portion is in fluid communication with the rear chamber;
- and
- e. a skimmer disposed within the forward portion of the chute, the skimmer comprising a contaminant deflection wall.
3 more elements
An extracting blower, comprising:
- a. a fan housing in which is defined a front chamber and a rear chamber with an interior wall disposed within the housing to separate the front chamber from the rear chamber;
- b. a first opening in the fan housing and a second opening in the interior wall;
- c. a rotatable impeller located within the fan housing, the impeller disposed to extend from the rear chamber to the front chamber through the second opening in the interior wall, the impeller including a back plate oriented within the rear chamber and a plurality of impeller blades extending through the second opening from the back plate, at least one impeller blade is oriented to form an acute angle between the impeller blade and the back plate in the direction of rotation of the impeller;
- d. the housing including a tangential section extending therefrom, the tangential section forming a chute internally defined by a forward portion and a rear portion, wherein the forward portion is in fluid communication with the front chamber and the rear portion is in fluid communication with the rear chamber;
- and
- e. a skimmer disposed within the forward portion of the chute, the skimmer comprising a contaminant deflection wall.
3 more elements
An extracting blower, comprising:
- a. a fan housing in which is defined a front chamber and a rear chamber with an interior wall disposed within the housing to separate the front chamber from the rear chamber;
- b. a first opening in the fan housing and a second opening in the interior wall;
- c. a rotatable impeller located within the fan housing, the impeller disposed to extend from the rear chamber to the front chamber through the second opening in the interior wall, the impeller including a back plate oriented within the rear chamber and a plurality of impeller blades extending through the second opening from the back plate;
- d. the housing including a tangential section extending therefrom, the tangential section forming a chute internally defined by a forward portion and a rear portion, wherein the forward portion is in fluid communication with the forward chamber and the rear portion is in fluid communication with the rear chamber;
- e. a skimmer disposed within the forward portion of the chute, the skimmer comprising a contaminant deflection wall;
- and
- f. an exterior side wall having an inner surface and an outer surface and defining the front chamber, the rear chamber and the chute, wherein the skimmer is attached to the inner surface of the exterior side wall.
4 more elements
An extracting blower, comprising:
- a. a first stage air cleaning apparatus having a centrifugal impeller disposed to extend between a front clean air chamber and a rear contaminant chamber;
- b. a second stage air cleaning apparatus having an air chute in fluid communication with the front clean air chamber and a skimmer disposed within the clean air chute, the skimmer comprising a contaminant deflection wall;
- and
- c. a plurality of impeller blades disposed upon the impeller blades defined by a leading edge, a trailing edge and an outer edge, wherein at least one of the impeller blades is provided with a notch adjacent the outer edge.
1 more element
An extracting blower, comprising:
- a. a first stage air cleaning apparatus having a centrifugal impeller disposed to extend between a front clean air chamber and a rear contaminant chamber, the centrifugal impeller having a back plate, a hub axially attached thereto and impeller blades extending therefrom, the impeller blades defined by a leading edge, a trailing edge and an outer edge, wherein at least one impeller blade is oriented to form an acute angle between the impeller blade and the back plate in the direction of rotation of the impeller;
- and
- b. a second stage air cleaning apparatus having an air chute in fluid communication with the front clean air chamber and a skimmer disposed within the clean air chute, the skimmer comprising a contaminant deflection wall.
An extracting blower, comprising:
- a. a first stage air cleaning apparatus having a centrifugal impeller disposed to extend between a front clean air chamber and a rear contaminant chamber;
- b. a second stage air cleaning apparatus having an air chute in fluid communication with the front clean air chamber and a skimmer disposed within the clean air chute, the skimmer comprising a contaminant deflection wall;
- and
- c. an exterior side wall having an inner surface and an outer surface and defining the front chamber, the rear chamber and further defining the chute of the second stage air cleaning apparatus, the skimmer being attached to the inner surface of the exterior side wall.
1 more element
Dependencies are inferred from the claim text.