Centrifugal blower assembly

Claim 2

A rotor for a centrifugal blower assembly comprising: a. at least one blower wheel having an axially desposed tubular hub b. a stub shaft mounted in each of the opposite ends of the tubular hub of said blower wheel, each of the stub shafts axially slidable in the tubular hub between an extended and a retracted position; and c. means cooperating between the tubular hub of said blower wheel and said stub shafts for controlling the axial movement thereof and for fixing said stub shafts for rotation with said blower wheel wherein said means comprises: 1. a set screw mounted adjacent to each of the opposite ends of the tubular hub, said set screws positioned for threaded movement into the bore of the tubular hub; and 2. a key-way formed in each of the stub shafts for engagement with their respective set screws for axially fixidly positioning said stub shafts within the tubular hub and for fixing said stub shafts for rotation with said blower wheel, said key-ways having closed ends for limiting the axial positioning of said stub shafts.

Claim 3

a key-way formed in each of the stub shafts for engagement with their respective set screws for axially fixidly positioning said stub shafts within the tubular hub and for fixing said stub shafts for rotation with said blower wheel, said key-ways having closed ends for limiting the axial positioning of said stub shafts.

Claim 4

a key-way formed in each of the stub shafts for engagement with their respective set screws for axially fixidly positioning said stub shafts within the tubular hub and for fixing said stub shafts for rotation with said blower wheel, said key-ways having closed ends for limiting the axial positioning of said stub shafts.

Claim 5

a pin mounted on each of said stub shafts and radially extending therefrom; and

Claim 6

a pin mounted on each of said stub shafts and radially extending therefrom; and

Claim 7

A rotor for a centrifugal blown assembly comprising: a. at least one blower wheel having an axially disposed tubular hub; b. a stub shaft mounted in each of the opposite ends of the tubular hub of said blower wheel, each of said stub shafts axially slidable in the tubular hub between an extended and a retracted position; and c. means cooperating between the tubular hub of said blower and said stub shafts for controlling the axial movements thereof and for fixing said stub shafts for rotation with said blower wheel, wherein said means comprises:

Claim 8

A rotor for a centrifugal blown assembly comprising: a. at least one blower wheel having an axially disposed tubular hub; b. a stub shaft mounted in each of the opposite ends of the tubular hub of said blower wheel, each of said stub shafts axially slidable in the tubular hub between an extended and a retracted position; and c. means cooperating between the tubular hub of said blower and said stub shafts for controlling the axial movements thereof and for fixing said stub shafts for rotation with said blower wheel, wherein said means comprises:

Claim 9

A centrifugal blower assembly comprising: a. a pair of spaced apart side walls each having a bearing mounted thereon, the bearings in axial alignment with respect to each other; b. a rotor having a tubular hub in each end of which an axially positionable stub shaft is mounted, each of the stub shafts axially extendable for rotatably journaling said rotor in the bearings of said side walls and axially retractable for disengaging said rotor from the bearings; c. means on said rotor and on the stub shafts for controlling axial movements of the stub shafts and for fixing the stub shafts for rotation with said rotor; d. a spiral-shaped surface mounted between said side walls, said spiral-shaped surface having a pair of fixed segments spacedly arranged to provide an access opening therebetween through which said rotor may be removed or installed, said spiral-shaped surface having a removable segment positioned to close the access opening; e. attaching means formed on the removable segment and on the fixed segments for demountably attaching the removable segment to each of the fixed segments; and f. support means formed on each of said side walls and on the opposite side edges of the removable segment for demountably attaching the removable segment to each of said side walls.

Claim 10

A centrifugal blower assembly comprising: a. a pair of spaced apart side walls each having a bearing mounted thereon, the bearings in axial alignment with respect to each other; b. a rotor having a tubular hub in each end of which an axially positionable stub shaft is mounted, each of the stub shafts axially extendable for rotatably journaling said rotor in the bearings of said side walls and axially retractable for disengaging said rotor from the bearings; c. means on said rotor and on the stub shafts for controlling axial movements of the stub shafts and for fixing the stub shafts for rotation with said rotor; d. a spiral-shaped surface mounted between said side walls, said spiral-shaped surface having a pair of fixed segments spacedly arranged to provide an access opening therebetween through which said rotor may be removed or installed, said spiral-shaped surface having a removable segment positioned to close the access opening; e. attaching means formed on the removable segment and on the fixed segments for demountably attaching the removable segment to each of the fixed segments; and f. support means formed on each of said side walls and on the opposite side edges of the removable segment for demountably attaching the removable segment to each of said side walls.

Claim 11

the tubular hub having a slot formed adjacent to each end thereof for slidingly receiving the pins of said stub shafts to limit axial movement thereof and for fixing said stub shafts for rotation with said blower wheel.

Claim 12

the tubular hub having a slot formed adjacent to each end thereof for slidingly receiving the pins of said stub shafts to limit axial movement thereof and for fixing said stub shafts for rotation with said blower wheel.

Claim 13

A centrifugal blower assembly as claimed in claim 3 wherein said means for controlling axial movement of the stub shafts and for fixing the stub shaFts for rotation with said rotor comprises: a. a set screw threadably mounted adjacent to each end of the tubular hub of said rotor; and b. a key-way formed in each of the stub shafts and positioned therein for frictional engagement with an adjacent one of said set screws.

Claim 14

A centrifugal blower assembly as claimed in claim 3 wherein said means for controlling axial movements of the stub shafts and for fixing the stub shafts for rotation with said rotor comprises: a. spring mounted within the tubular hub of said rotor between the inwardly disposed ends of the stub shafts, said spring biasingly engaging the stub shafts for urging them axially outwardly; b. a pin mounted in each of the stub shafts and radially extending therefrom; and c. the tubular hub of said rotor having a slot formed adjacent to each end of the tubular hub, each of said slots having an adjacent one of said pins axially slidably movable therein.

Claim 15

A centrifugal blower assembly as claimed in claim 3 wherein said support means comprises: a. a side flange formed on each of the opposite side edges of the removable segment of said spiral-shaped surface; and b. a pair of elongated members, each formed along its length into an arcuate path and formed into an offset in cross-section configuration, each of said elongated members attached to the interior of a different one of said side walls.

Claim 16

A centrifugal blower assembly as claimed in claim 3 wherein said support means comprises: a. a side flange formed on each of the opposite side edges of the removable segment of said spiral-shaped surface; and b. a plurality of offset tabs formed in each of said side walls, said tabs provided at spaced intervals and positioned in an arcuate path.